MICROCHIP PIC24FJ32GA102T-I/ML

PIC24FJ64GA104 Family
Data Sheet
28/44-Pin, 16-Bit General Purpose
Flash Microcontrollers
with nanoWatt XLP Technology
 2010 Microchip Technology Inc.
DS39951C
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,
PIC32 logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Octopus, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2010, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN:978-1-60932-440-7
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS39951C-page 2
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
28/44-Pin, 16-Bit General Purpose Flash Microcontrollers
with nanoWatt XLP Technology
Power Management Modes:
Special Microcontroller Features
(continued):
• Selectable Power Management modes with nanoWatt
XLP Technology for Extremely Low Power:
- Deep Sleep mode allows near total power-down
(20 nA typical and 500 nA with RTCC or WDT),
along with the ability to wake-up on external triggers,
or self-wake on programmable WDT or RTCC alarm
- Extreme low-power DSBOR for Deep Sleep,
LPBOR for all other modes
- Sleep mode shuts down peripherals and core for
substantial power reduction, fast wake-up
- Idle mode shuts down the CPU and peripherals for
significant power reduction, down to 4.5 A typical
- Doze mode enables CPU clock to run slower than
peripherals
- Alternate Clock modes allow on-the-fly switching to
a lower clock speed for selective power reduction
during Run mode, down to 15 A typical
• Flash Program Memory:
- 10,000 erase/write cycle endurance (minimum)
- 20-year data retention minimum
- Selectable write protection boundary
• Fail-Safe Clock Monitor Operation:
- Detects clock failure and switches to on-chip
FRC Oscillator
• On-Chip 2.5V Regulator
• Power-on Reset (POR), Power-up Timer (PWRT)
and Oscillator Start-up Timer (OST)
• Two Flexible Watchdog Timers (WDT) for Reliable
Operation:
- Standard programmable WDT for normal operation
- Extreme low-power WDT with programmable
period of 2 ms to 26 days for Deep Sleep mode
• In-Circuit Serial Programming™ (ICSP™) and
In-Circuit Debug (ICD) via 2 Pins
• JTAG Boundary Scan Support
High-Performance CPU:
• Modified Harvard Architecture
• Up to 16 MIPS Operation @ 32 MHz
• 8 MHz Internal Oscillator with:
- 4x PLL option
- Multiple divide options
• 17-Bit x 17-Bit Single-Cycle Hardware
Fractional/integer Multiplier
• 32-Bit by 16-Bit Hardware Divider
• 16 x 16-Bit Working Register Array
• C Compiler Optimized Instruction Set Architecture:
- 76 base instructions
- Flexible addressing modes
• Linear Program Memory Addressing, up to 12 Mbytes
• Linear Data Memory Addressing, up to 64 Kbytes
• Two Address Generation Units for Separate Read and
Write Addressing of Data Memory
Analog Features:
• 10-Bit, up to 13-Channel Analog-to-Digital (A/D)
Converter:
- 500 ksps conversion rate
- Conversion available during Sleep and Idle
• Three Analog Comparators with Programmable
Input/Output Configuration
• Charge Time Measurement Unit (CTMU):
- Supports capacitive touch sensing for touch
screens and capacitive switches
- Provides high-resolution time measurement and
simple temperature sensing
Special Microcontroller Features:
Operating Voltage Range of 2.0V to 3.6V
Self-Reprogrammable under Software Control
5.5V Tolerant Input (digital pins only)
High-Current Sink/Source (18 mA/18 mA) on All I/O pins
PIC24FJ
Device
Program Memory
(Bytes)
SRAM
(Bytes)
Remappable
Pins
Timers
16-Bit
Capture
Input
Compare/PWM
Output
UART w/
IrDA®
SPI
I2C™
10-Bit A/D
(ch)
Comparators
PMP/PSP
RTCC
CTMU
Remappable Peripherals
Pins
•
•
•
•
32GA102
28
32K
8K
16
5
5
5
2
2
2
10
3
Y
Y
Y
64GA102
28
64K
8K
16
5
5
5
2
2
2
10
3
Y
Y
Y
32GA104
44
32K
8K
26
5
5
5
2
2
2
13
3
Y
Y
Y
64GA104
44
64K
8K
26
5
5
5
2
2
2
13
3
Y
Y
Y
 2010 Microchip Technology Inc.
DS39951C-page 3
PIC24FJ64GA104 FAMILY
Peripheral Features:
• Two UART modules:
- Supports RS-485, RS-232 and LIN/J2602
- On-chip hardware encoder/decoder for IrDA®
- Auto-wake-up on Start bit
- Auto-Baud Detect (ABD)
- 4-level deep FIFO buffer
• Five 16-Bit Timers/Counters with Programmable
Prescaler
• Five 16-Bit Capture Inputs, each with a Dedicated Time
Base
• Five 16-Bit Compare/PWM Outputs, each with a
Dedicated Time Base
• Programmable, 32-Bit Cyclic Redundancy Check (CRC)
Generator
• Configurable Open-Drain Outputs on Digital I/O Pins
• Up to 3 External Interrupt Sources
• Peripheral Pin Select:
- Allows independent I/O mapping of many peripherals
- Up to 26 available pins (44-pin devices)
- Continuous hardware integrity checking and safety
interlocks prevent unintentional configuration changes
• 8-Bit Parallel Master Port (PMP/PSP):
- Up to 16-bit multiplexed addressing, with up to
11 dedicated address pins on 44-pin devices
- Programmable polarity on control lines
- Supports legacy Parallel Slave Port
• Hardware Real-Time Clock/Calendar (RTCC):
- Provides clock, calendar and alarm functions
- Functions even in Deep Sleep mode
• Two 3-Wire/4-Wire SPI modules (support 4 Frame
modes) with 8-Level FIFO Buffer
• Two I2C™ modules support Multi-Master/Slave mode
and 7-Bit/10-Bit Addressing
Pin Diagrams
28-Pin SPDIP, SOIC, SSOP(1)
Legend:
Note 1:
2:
DS39951C-page 4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PIC24FJXXGA102
MCLR
AN0/C3INC/VREF+/CN2/CTED1/RA0
AN1/C3IND/VREF-/CN3/CTED2/RA1
PGED1/AN2/C2INB/RP0/CN4/RB0
PGEC1/AN3/C2INA/RP1/CN5/RB1
AN4/C1INB/RP2/SDA2/CN6/RB2
AN5/C1INA/RP3/SCL2/CN7/RB3
VSS
OSCI/CLKI/C1IND/CN30/RA2
OSCO/CLKO/PMA0/CN29/RA3
SOSCI/C2IND/RP4/PMBE/CN1/RB4
SOSCO/SCLKI/T1CK/C2INC/CN0/PMA1/RA4
VDD
PGED3/RP5/ASDA1(2)/CN27/PMD7/RB5
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD
VSS
AN9/C3INA/RP15/CN11/PMCS1/RB15
AN10/C3INB/CVREF/RTCC/RP14/CN12/PMWR/RB14
AN11/C1INC/RP13/CN13/PMRD/REFO/RB13
AN12/RP12/CN14/PMD0/RB12
PGEC2/TMS/RP11/CN15/PMD1/RB11
PGED2/TDI/RP10/CN16/PMD2/RB10
VCAP/VDDCORE
DISVREG
TDO/RP9/SDA1/CN21/PMD3/RB9
TCK/RP8/SCL1/CN22/PMD4/RB8
RP7/INT0/CN23/PMD5/RB7
PGC3/EMUC3/RP6/ASCL1(2)/CN24/PMD6/RB6
RPn represents remappable peripheral pins.
Gray shading indicates 5.5V tolerant input pins.
Alternative multiplexing for SDA1 and SCL1 when the I2C1SEL bit is set.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
AN1/C3IND/VREF-/CN3/CTED2/RA1
AN0/C3INC/VREF+/CN2/CTED1/RA0
MCLR
28-Pin QFN(1,3)
VDD
VSS
AN9/C3INA/RP15/CN11/PMCS1/RB15
AN10/C3INB/CVREF/RTCC/RP14/CN12/PMWR/RB14
Pin Diagrams
28 27 26 25 24 23 22
AN5/C1INA/SCL2/RP3/CN7/RB3
VSS
OSCI/CLKI/C1IND/CN30/RA2
OSCO/CLKO/CN29/PMA0/RA3
PIC24FJXXGA102
SOSCI/C2IND/RP4/PMBE/CN1/RB4
8
Legend:
Note 1:
2:
3:
9 10 11 12 13 14
21
20
19
18
17
16
15
AN11/C1INC/RP13/CN13/PMRD/REFO/RB13
AN12/RP12/CN14/PMD0/RB12
PGEC2/TMS/RP11/CN15/PMD1/RB11
PGED2/TDI/RP10/CN16/PMD2/RB10
VCAP/VDDCORE
DISVREG
TDO/RP9/SDA1/CN21/PMD3/RB9
RP7/INT0/CN23/PMD5/RB7
TCK/RP8/SCL1/CN22/PMD4/RB8
AN4/C1INB/SDA2/RP2/CN6/RB2
1
2
3
4
5
6
7
SOSCO/SCLKI/T1CK/C2INC/CN0/PMA1/RA4
VDD
PGED3/RP5/ASDA1(2)/CN27/PMD7/RB5
PGEC3/RP6/ASCL1(2)/CN24/PMD6/RB6
PGED1/AN2/C2INB/RP0/CN4/RB0
PGEC1/AN3/C2INA/RP1/CN5/RB1
RPn represents remappable peripheral pins.
Gray shading indicates 5.5V tolerant input pins.
Alternative multiplexing for SDA1 and SCL1 when the I2C1SEL bit is set.
The back pad on QFN devices should be connected to VSS.
 2010 Microchip Technology Inc.
DS39951C-page 5
PIC24FJ64GA104 FAMILY
RP8/SCL1/CN22/PMD4/RB8
RP7/INT0/CN23/PMD5/RB7
PGEC3/RP6/ASCL1(2)/CN24/PMD6/RB6
PGED3/RP5/ASDA1(2)/CN27/PMD7/RB5
VDD
VSS
RP21/CN26/PMA3/RC5
RP20/CN25/PMA4/RC4
RP19/CN28/PMBE/RC3
TDI/PMA9/RA9
SOSCO/SCLKI/T1CK/C2INC/CN0/RA4
Pin Diagrams
44-PIN TQFP,
44
43
42
41
40
39
38
37
36
35
34
44-Pin QFN(1,3)
PIC24FJXXGA104
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
SOSCI/C1IND/RP4/CN1/RB4
TDO/PMA8/RA8
OSCO/CLKO/CN29/RA3
OSCI/CLKI/C1IND/CN30/RA2
VSS
VDD
AN8/RP18/PMA2/CN10/RC2
AN7/RP17/CN9/RC1
AN6/RP16/CN8/RC0
AN5/C1INA/RP3/SCL2/CN7/RB3
AN4/C1INB/RP2/SDA2/CN6/RB2
TMS/PMA10/RA10
TCK/PMA7/RA7
AN10/C3INB/CVREF/RTCC/RP14/CN12/PMWR/RB14
AN9/C3INA/RP15/CN11/RB15
AVSS
AVDD
MCLR
AN0/C3INC/VREF+/CN2/CTED1/RA0
AN1/C3IND/VREF-/CN3/CTED2/RA1
PGED1/AN2/C2INB/RP0/CN4/RB0
PGEC1/AN3/C2INA/RP1/CN5/RB1
RP9/SDA1/CN21/PMD3/RB9
RP22/CN18/PMA1/RC6
RP23/CN17/PMA0/RC7
RP24/CN20/PMA5/RC8
RP25/CN19/PMA6/RC9
DISVREG
VCAP/VDDCORE
PGED2/RP10/CN16/PMD2/RB10
PGEC2/RP11/CN15/PMD1/RB11
AN12/RP12/CN14/PMD0/RB12
AN11/C1INC/RP13/PMRD/REFO/CN13/RB13
Legend:
Note 1:
2:
3:
DS39951C-page 6
RPn represents remappable peripheral pins.
Gray shading indicates 5.5V tolerant input pins.
Alternative multiplexing for SDA1 and SCL1 when the I2C1SEL bit is set.
The back pad on QFN devices should be connected to VSS.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
Table of Contents
1.0 Device Overview .......................................................................................................................................................................... 9
2.0 Guidelines for Getting Started with 16-bit Microcontrollers ........................................................................................................ 19
3.0 CPU ........................................................................................................................................................................................... 25
4.0 Memory Organization ................................................................................................................................................................. 31
5.0 Flash Program Memory.............................................................................................................................................................. 51
6.0 Resets ........................................................................................................................................................................................ 59
7.0 Interrupt Controller ..................................................................................................................................................................... 65
8.0 Oscillator Configuration ............................................................................................................................................................ 101
9.0 Power-Saving Features............................................................................................................................................................ 111
10.0 I/O Ports ................................................................................................................................................................................... 121
11.0 Timer1 ...................................................................................................................................................................................... 143
12.0 Timer2/3 and Timer4/5 ............................................................................................................................................................ 145
13.0 Input Capture with Dedicated Timers ....................................................................................................................................... 151
14.0 Output Compare with Dedicated Timers .................................................................................................................................. 155
15.0 Serial Peripheral Interface (SPI)............................................................................................................................................... 165
16.0 Inter-Integrated Circuit (I2C™) ................................................................................................................................................. 175
17.0 Universal Asynchronous Receiver Transmitter (UART) ........................................................................................................... 183
18.0 Parallel Master Port (PMP)....................................................................................................................................................... 191
19.0 Real-Time Clock and Calendar (RTCC) .................................................................................................................................. 201
20.0 32-Bit Programmable Cyclic Redundancy Check (CRC) Generator ........................................................................................ 213
21.0 10-Bit High-Speed A/D Converter ............................................................................................................................................ 219
22.0 Triple Comparator Module........................................................................................................................................................ 229
23.0 Comparator Voltage Reference................................................................................................................................................ 233
24.0 Charge Time Measurement Unit (CTMU) ................................................................................................................................ 235
25.0 Special Features ...................................................................................................................................................................... 239
26.0 Development Support............................................................................................................................................................... 251
27.0 Instruction Set Summary .......................................................................................................................................................... 255
28.0 Electrical Characteristics .......................................................................................................................................................... 263
29.0 Packaging Information.............................................................................................................................................................. 283
Appendix A: Revision History............................................................................................................................................................. 297
Index ................................................................................................................................................................................................. 299
The Microchip Web Site ..................................................................................................................................................................... 305
Customer Change Notification Service .............................................................................................................................................. 305
Customer Support .............................................................................................................................................................................. 305
Reader Response .............................................................................................................................................................................. 306
Product Identification System ............................................................................................................................................................ 307
 2010 Microchip Technology Inc.
DS39951C-page 7
PIC24FJ64GA104 FAMILY
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DS39951C-page 8
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
1.0
DEVICE OVERVIEW
This document contains device-specific information for
the following devices:
• PIC24FJ32GA102
• PIC24FJ32GA104
• PIC24FJ64GA102
• PIC24FJ64GA104
The PIC24FJ64GA104 family provides an expanded
peripheral feature set and a new option for
high-performance applications which may need more
than an 8-bit platform, but do not require the power of a
digital signal processor.
1.1
1.1.1
Core Features
16-BIT ARCHITECTURE
Central to all PIC24F devices is the 16-bit modified
Harvard architecture, first introduced with Microchip’s
dsPIC® digital signal controllers. The PIC24F CPU core
offers a wide range of enhancements, such as:
• 16-bit data and 24-bit address paths with the
ability to move information between data and
memory spaces
• Linear addressing of up to 12 Mbytes (program
space) and 64 Kbytes (data)
• A 16-element working register array with built-in
software stack support
• A 17 x 17 hardware multiplier with support for
integer math
• Hardware support for 32 by 16-bit division
• An instruction set that supports multiple
addressing modes and is optimized for high-level
languages, such as ‘C’
• Operational performance up to 16 MIPS
1.1.2
POWER-SAVING TECHNOLOGY
All of the devices in the PIC24FJ64GA104 family
incorporate a range of features that can significantly
reduce power consumption during operation. Key
items include:
• On-the-Fly Clock Switching: The device clock
can be changed under software control to the
Timer1 source or the internal, Low-Power Internal
RC Oscillator during operation, allowing the user
to incorporate power-saving ideas into their
software designs.
• Doze Mode Operation: When timing-sensitive
applications, such as serial communications,
require the uninterrupted operation of peripherals,
the CPU clock speed can be selectively reduced,
allowing incremental power savings without
missing a beat.
 2010 Microchip Technology Inc.
• Instruction-Based Power-Saving Modes: There
are three instruction-based power-saving modes:
- Idle Mode – The core is shut down while leaving
the peripherals active.
- Sleep Mode – The core and peripherals that
require the system clock are shut down, leaving
the peripherals active that use their own clock or
the clock from other devices.
- Deep Sleep Mode – The core, peripherals
(except RTCC and DSWDT), Flash and SRAM
are shut down for optimal current savings to
extend battery life for portable applications.
1.1.3
OSCILLATOR OPTIONS AND
FEATURES
All of the devices in the PIC24FJ64GA104 family offer
five different oscillator options, allowing users a range
of choices in developing application hardware. These
include:
• Two Crystal modes using crystals or ceramic
resonators.
• Two External Clock modes offering the option of a
divide-by-2 clock output.
• A Fast Internal Oscillator (FRC) with a nominal
8 MHz output, which can also be divided under
software control to provide clock speeds as low as
31 kHz.
• A Phase Lock Loop (PLL) frequency multiplier
available to the external oscillator modes and the
FRC Oscillator, which allows clock speeds of up
to 32 MHz.
• A separate Low-Power Internal RC Oscillator
(LPRC) with a fixed 31 kHz output, which provides a low-power option for timing-insensitive
applications.
The internal oscillator block also provides a stable
reference source for the Fail-Safe Clock Monitor. This
option constantly monitors the main clock source
against a reference signal provided by the internal
oscillator and enables the controller to switch to the
internal oscillator, allowing for continued low-speed
operation or a safe application shutdown.
1.1.4
EASY MIGRATION
Regardless of the memory size, all devices share the
same rich set of peripherals, allowing for a smooth
migration path as applications grow and evolve. The
consistent pinout scheme used throughout the entire
family also aids in migrating from one device to the next
larger device.
The PIC24F family is pin-compatible with devices in the
dsPIC33 family, and shares some compatibility with the
pinout schema for PIC18 and dsPIC30 devices. This
extends the ability of applications to grow from the
relatively simple, to the powerful and complex, yet still
selecting a Microchip device.
DS39951C-page 9
PIC24FJ64GA104 FAMILY
1.2
Other Special Features
• Peripheral Pin Select: The Peripheral Pin Select
feature allows most digital peripherals to be
mapped over a fixed set of digital I/O pins. Users
may independently map the input and/or output of
any one of the many digital peripherals to any one
of the I/O pins.
• Communications: The PIC24FJ64GA104 family
incorporates a range of serial communication
peripherals to handle a range of application
requirements. There are two independent I2C™
modules that support both Master and Slave
modes of operation. Devices also have, through
the Peripheral Pin Select (PPS) feature, two
independent UARTs with built-in IrDA®
encoder/decoders and two SPI modules.
• Analog Features: All members of the
PIC24FJ64GA104 family include a 10-bit A/D
Converter module and a triple comparator
module. The A/D module incorporates programmable acquisition time, allowing for a channel to
be selected and a conversion to be initiated
without waiting for a sampling period, as well as
faster sampling speeds. The comparator module
includes three analog comparators that are
configurable for a wide range of operations.
• CTMU Interface: This module provides a
convenient method for precision time measurement and pulse generation, and can serve as an
interface for capacitive sensors.
• Parallel Master/Enhanced Parallel Slave Port:
One of the general purpose I/O ports can be
reconfigured for enhanced parallel data communications. In this mode, the port can be configured
for both master and slave operations, and
supports 8-bit and 16-bit data transfers with up to
12 external address lines in Master modes.
• Real-Time Clock/Calendar: This module
implements a full-featured clock and calendar with
alarm functions in hardware, freeing up timer
resources and program memory space for the use
of the core application.
DS39951C-page 10
1.3
Details on Individual Family
Members
Devices in the PIC24FJ64GA104 family are available
in 28-pin and 44-pin packages. The general block
diagram for all devices is shown in Figure 1-1.
The devices are differentiated from each other in
several ways:
• Flash Program Memory:
- PIC24FJ32GA1 devices – 32 Kbytes
- PIC24FJ64GA1 devices – 64 Kbytes
• Available I/O Pins and Ports:
- 28-pin devices – 21 pins on two ports
- 44-pin devices – 35 pins on three ports
• Available Interrupt-on-Change Notification (ICN)
Inputs:
- 28-pin devices – 21
- 44-pin devices – 31
• Available Remappable Pins:
- 28-pin devices – 16 pins
- 44-pin devices – 26 pins
• Available PMP Address Pins:
- 28-pin devices – 3 pins
- 44-pin devices – 12 pins
• Available A/D Input Channels:
- 28-pin devices – 10 pins
- 44-pin devices – 13 pins
All other features for devices in this family are identical.
These are summarized in Table 1-1.
A list of the pin features available on the
PIC24FJ64GA104 family devices, sorted by function, is
shown in Table 1-2. Note that this table shows the pin
location of individual peripheral features and not how
they are multiplexed on the same pin. This information
is provided in the pinout diagrams in the beginning of
this data sheet. Multiplexed features are sorted by the
priority given to a feature, with the highest priority
peripheral being listed first.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 1-1:
DEVICE FEATURES FOR THE PIC24FJ64GA104 FAMILY
Features
PIC24FJ32GA102
PIC24FJ64GA102 PIC24FJ32GA104 PIC24FJ64GA104
Operating Frequency
Program Memory (bytes)
Program Memory (instructions)
DC – 32 MHz
32K
64K
11,008
22,016
Data Memory (bytes)
64K
11,008
22,016
8,192
Interrupt Sources (soft vectors/
NMI traps)
I/O Ports
32K
45 (41/4)
Ports A and B
Ports A, B, C
Total I/O Pins
21
35
Remappable Pins
16
26
Timers:
5(1)
Total Number (16-bit)
32-Bit (from paired 16-bit timers)
2
Input Capture Channels
5(1)
Output Compare/PWM Channels
5(1)
Input Change Notification Interrupt
21
31
Serial Communications:
UART
2(1)
SPI (3-wire/4-wire)
2(1)
I2C™
2
Parallel Communications (PMP/PSP)
Yes
JTAG Boundary Scan
10-Bit Analog-to-Digital Module
(input channels)
Yes
10
Analog Comparators
3
CTMU Interface
Resets (and delays)
Instruction Set
Packages
Note 1:
13
Yes
POR, BOR, RESET Instruction, MCLR, WDT; Illegal Opcode,
REPEAT Instruction, Hardware Traps, Configuration Word Mismatch
(PWRT, OST, PLL Lock)
76 Base Instructions, Multiple Addressing Mode Variations
28-Pin QFN, SOIC, SSOP and SPDIP
44-Pin QFN and TQFP
Peripherals are accessible through remappable pins.
 2010 Microchip Technology Inc.
DS39951C-page 11
PIC24FJ64GA104 FAMILY
FIGURE 1-1:
PIC24FJ64GA104 FAMILY GENERAL BLOCK DIAGRAM
Data Bus
Interrupt
Controller
PORTA(1)
16
(9 I/O)
16
16
8
Data Latch
PSV & Table
Data Access
Control Block
Data RAM
PCH
PCL
Program Counter
Repeat
Stack
Control
Control
Logic
Logic
23
Address
Latch
PORTB
(16 I/O)
16
23
16
Read AGU
Write AGU
Address Latch
PORTC(1)
Program Memory
(10 I/O)
Data Latch
16
EA MUX
Literal Data
Address Bus
24
Inst Latch
16
16
RP(1)
Inst Register
RP0:RP25
Instruction
Decode &
Control
Divide
Support
Control Signals
OSCO/CLKO
OSCI/CLKI
Timing
Generation
FRC/LPRC
Oscillators
REFO
DISVREG
Power-up
Timer
Oscillator
Start-up Timer
Watchdog
Timer
Voltage
Regulator
BOR and
LVD(2)
Timer1
Timer2/3(3)
16-Bit ALU
Power-on
Reset
Precision
Band Gap
Reference
VDDCORE/VCAP
16 x 16
W Reg Array
17 x 17
Multiplier
VDD, VSS
Timer4/5(3)
16
MCLR
RTCC
10-Bit
ADC
Comparators(3)
PMP/PSP
IC
1-5(3)
Note
1:
2:
3:
PWM/OC
1-5(3)
ICNs(1)
SPI
1/2(3)
I2C
1/2
UART
1/2(3)
CTMU
Not all I/O pins or features are implemented on all device pinout configurations. See Table 1-2 for specific implementations by pin count.
BOR functionality is provided when the on-board voltage regulator is enabled.
These peripheral I/Os are only accessible through remappable pins.
DS39951C-page 12
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 1-2:
PIC24FJ64GA104 FAMILY PINOUT DESCRIPTIONS
Pin Number
Function
28-Pin
SPDIP/
SOIC/SSOP
28-Pin
QFN
44-Pin
QFN/
TQFP
I/O
Input
Buffer
AN0
2
27
19
I
ANA
AN1
3
28
20
I
ANA
AN2
4
1
21
I
ANA
AN3
5
2
22
I
ANA
AN4
6
3
23
I
ANA
AN5
7
4
24
I
ANA
AN6
—
—
25
I
ANA
AN7
—
—
26
I
ANA
AN8
—
—
27
I
ANA
AN9
26
23
15
I
ANA
AN10
25
22
14
I
ANA
AN11
24
21
11
I
ANA
AN12
23
20
10
I
ANA
ASCL1
15
12
42
I/O
I2C
2
Description
A/D Analog Inputs.
Alternate I2C1 Synchronous Serial Clock Input/Output.
ASDA1
14
11
41
I/O
I C
Alternate I2C1 Synchronous Serial Data Input/Output.
AVDD
—
—
17
P
—
Positive Supply for Analog modules.
AVSS
—
—
16
P
—
Ground Reference for Analog modules.
C1INA
7
4
24
I
ANA
Comparator 1 Input A.
C1INB
6
3
23
I
ANA
Comparator 1 Input B.
C1INC
24
21
11
I
ANA
Comparator 1 Input C.
C1IND
9
6
30
I
ANA
Comparator 1 Input D.
C2INA
5
2
22
I
ANA
Comparator 2 Input A.
C2INB
4
1
21
I
ANA
Comparator 2 Input B.
C2INC
12
9
34
I
ANA
Comparator 2 Input C.
C2IND
11
8
33
I
ANA
Comparator 2 Input D.
C3INA
26
23
15
I
ANA
Comparator 3 Input A.
C3INB
25
22
14
I
ANA
Comparator 3 Input B.
C3INC
2
27
19
I
ANA
Comparator 3 Input C.
C3IND
3
28
20
I
ANA
Comparator 3 Input D.
CLKI
9
6
30
I
ANA
Main Clock Input Connection.
10
7
31
O
—
CLKO
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
 2010 Microchip Technology Inc.
System Clock Output.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
DS39951C-page 13
PIC24FJ64GA104 FAMILY
TABLE 1-2:
PIC24FJ64GA104 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
Function
28-Pin
SPDIP/
SOIC/SSOP
28-Pin
QFN
44-Pin
QFN/
TQFP
I/O
Input
Buffer
CN0
12
9
34
I
ST
CN1
11
8
33
I
ST
CN2
2
27
19
I
ST
CN3
3
28
20
I
ST
CN4
4
1
21
I
ST
CN5
5
2
22
I
ST
CN6
6
3
23
I
ST
Description
Interrupt-on-Change Inputs.
CN7
7
4
24
I
ST
CN8
—
—
25
I
ST
CN9
—
—
26
I
ST
CN10
—
—
27
I
ST
CN11
26
23
15
I
ST
CN12
25
22
14
I
ST
CN13
24
21
11
I
ST
CN14
23
20
10
I
ST
CN15
22
19
9
I
ST
CN16
21
18
8
I
ST
CN17
—
—
3
I
ST
CN18
—
—
2
I
ST
CN19
—
—
5
I
ST
CN20
—
—
4
I
ST
CN21
18
15
1
I
ST
CN22
17
14
44
I
ST
CN23
16
13
43
I
ST
CN24
15
12
42
I
ST
CN25
—
—
37
I
ST
CN26
—
—
38
I
ST
CN27
14
11
41
I
ST
CN28
—
—
36
I
ST
CN29
10
7
31
I
ST
CN30
9
6
30
I
ST
CTED1
2
27
19
I
ANA
CTMU External Edge Input 1.
CTED2
3
28
20
I
ANA
CTMU External Edge Input 2.
CVREF
25
22
14
O
—
Comparator Voltage Reference Output.
DISVREG
19
16
6
I
ST
Voltage Regulator Disable.
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
DS39951C-page 14
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 1-2:
PIC24FJ64GA104 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
28-Pin
SPDIP/
SOIC/SSOP
28-Pin
QFN
44-Pin
QFN/
TQFP
I/O
Input
Buffer
INT0
16
13
43
I
ST
External Interrupt Input.
MCLR
1
26
18
I
ST
Master Clear (device Reset) Input. This line is brought low to
cause a Reset.
Function
Description
OSCI
9
6
30
I
ANA
Main Oscillator Input Connection.
OSCO
10
7
31
O
ANA
Main Oscillator Output Connection.
PGEC1
5
2
22
I/O
ST
PGED1
4
1
21
I/O
ST
In-Circuit Debugger/Emulator/ICSP Programming Data.
PGEC2
22
19
9
I/O
ST
In-Circuit Debugger/Emulator/ICSP Programming Clock.
PGED2
21
18
8
I/O
ST
In-Circuit Debugger/Emulator/ICSP Programming Data.
PGEC3
15
12
42
I/O
ST
In-Circuit Debugger/Emulator/ICSP Programming Clock.
PGED3
14
11
41
I/O
ST
In-Circuit Debugger/Emulator/ICSP Programming Data.
PMA0
10
7
3
I/O
ST
Parallel Master Port Address Bit 0 Input (Buffered Slave
modes) and Output (Master modes).
PMA1
12
9
2
I/O
ST
Parallel Master Port Address Bit 1 Input (Buffered Slave
modes) and Output (Master modes).
PMA2
—
—
27
O
—
Parallel Master Port Address (Demultiplexed Master modes).
PMA3
—
—
38
O
—
PMA4
—
—
37
O
—
PMA5
—
—
4
O
—
PMA6
—
—
5
O
—
PMA7
—
—
13
O
—
PMA8
—
—
32
O
—
PMA9
—
—
35
O
—
PMA10
—
—
12
O
PMCS1
26
23
15
I/O
In-Circuit Debugger/Emulator/ICSP™ Programming Clock.
—
ST/TTL Parallel Master Port Chip Select 1 Strobe/Address Bit 15.
PMBE
11
8
36
O
PMD0
23
20
10
I/O
PMD1
22
19
9
I/O
ST/TTL Parallel Master Port Data (Demultiplexed Master mode) or
ST/TTL Address/Data (Multiplexed Master modes).
PMD2
21
18
8
I/O
ST/TTL
PMD3
18
15
1
I/O
ST/TTL
PMD4
17
14
44
I/O
ST/TTL
PMD5
16
13
43
I/O
ST/TTL
PMD6
15
12
42
I/O
ST/TTL
PMD7
14
11
41
I/O
ST/TTL
PMRD
24
21
11
O
—
Parallel Master Port Read Strobe.
25
22
14
O
—
Parallel Master Port Write Strobe.
PMWR
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
 2010 Microchip Technology Inc.
—
Parallel Master Port Byte Enable Strobe.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
DS39951C-page 15
PIC24FJ64GA104 FAMILY
TABLE 1-2:
PIC24FJ64GA104 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
Input
Buffer
28-Pin
SPDIP/
SOIC/SSOP
28-Pin
QFN
RA0
2
27
19
I/O
ST
RA1
3
28
20
I/O
ST
RA2
9
6
30
I/O
ST
RA3
10
7
31
I/O
ST
RA4
12
9
34
I/O
ST
RA7
—
—
13
I/O
ST
RA8
—
—
32
I/O
ST
Function
44-Pin
QFN/
TQFP
I/O
RA9
—
—
35
I/O
ST
RA10
—
—
12
I/O
ST
RB0
4
1
21
I/O
ST
RB1
5
2
22
I/O
ST
RB2
6
3
23
I/O
ST
RB3
7
4
24
I/O
ST
RB4
11
8
33
I/O
ST
RB5
14
11
41
I/O
ST
RB6
15
12
42
I/O
ST
RB7
16
13
43
I/O
ST
RB8
17
14
44
I/O
ST
RB9
18
15
1
I/O
ST
RB10
21
18
8
I/O
ST
RB11
22
19
9
I/O
ST
RB12
23
20
10
I/O
ST
RB13
24
21
11
I/O
ST
RB14
25
22
14
I/O
ST
RB15
26
23
15
I/O
ST
RC0
—
—
25
I/O
ST
RC1
—
—
26
I/O
ST
RC2
—
—
27
I/O
ST
RC3
—
—
36
I/O
ST
RC4
—
—
37
I/O
ST
RC5
—
—
38
I/O
ST
RC6
—
—
2
I/O
ST
RC7
—
—
3
I/O
ST
RC8
—
—
4
I/O
ST
RC9
—
—
5
I/O
ST
24
21
11
O
—
REFO
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
DS39951C-page 16
Description
PORTA Digital I/O.
PORTB Digital I/O.
PORTC Digital I/O.
Reference Clock Output.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 1-2:
PIC24FJ64GA104 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
28-Pin
SPDIP/
SOIC/SSOP
28-Pin
QFN
44-Pin
QFN/
TQFP
I/O
Input
Buffer
RP0
4
1
21
I/O
ST
RP1
5
2
22
I/O
ST
RP2
6
3
23
I/O
ST
Function
Description
Remappable Peripheral (input or output).
RP3
7
4
24
I/O
ST
RP4
11
8
33
I/O
ST
RP5
14
11
41
I/O
ST
RP6
15
12
42
I/O
ST
RP7
16
13
43
I/O
ST
RP8
17
14
44
I/O
ST
RP9
18
15
1
I/O
ST
RP10
21
18
8
I/O
ST
RP11
22
19
9
I/O
ST
RP12
23
20
10
I/O
ST
RP13
24
21
11
I/O
ST
RP14
25
22
14
I/O
ST
RP15
26
23
15
I/O
ST
RP16
—
—
25
I/O
ST
RP17
—
—
26
I/O
ST
RP18
—
—
27
I/O
ST
RP19
—
—
36
I/O
ST
RP20
—
—
37
I/O
ST
RP21
—
—
38
I/O
ST
RP22
—
—
2
I/O
ST
RP23
—
—
3
I/O
ST
RP24
—
—
4
I/O
ST
RP25
—
—
5
I/O
ST
RTCC
25
22
14
O
—
Real-Time Clock Alarm/Seconds Pulse Output.
I2C1 Synchronous Serial Clock Input/Output.
SCL1
17
14
44
I/O
I2C
SCL2
7
4
24
I/O
I2C
I2C2 Synchronous Serial Clock Input/Output.
SDA1
18
15
1
I/O
I2C
I2C1 Data Input/Output.
SDA2
6
3
23
I/O
I2C
I2C2 Data Input/Output.
SOSCI
11
8
33
I
ANA
Secondary Oscillator/Timer1 Clock Input.
SOSCO
12
9
34
O
ANA
Secondary Oscillator/Timer1 Clock Output.
T1CK
12
9
34
I
ST
Timer1 Clock Input.
TCK
17
14
13
I
ST
JTAG Test Clock Input.
TDI
21
18
35
I
ST
JTAG Test Data Input.
TDO
18
15
32
O
—
JTAG Test Data Output.
22
19
12
I
ST
JTAG Test Mode Select Input.
TMS
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
 2010 Microchip Technology Inc.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
DS39951C-page 17
PIC24FJ64GA104 FAMILY
TABLE 1-2:
PIC24FJ64GA104 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
Function
28-Pin
SPDIP/
SOIC/SSOP
28-Pin
QFN
44-Pin
QFN/
TQFP
I/O
Input
Buffer
Description
VCAP
20
17
7
P
—
External Filter Capacitor Connection (regulator enabled).
VDD
13, 28
10, 25
28, 40
P
—
Positive Supply for Peripheral Digital Logic and I/O Pins.
VDDCORE
20
17
7
P
—
Positive Supply for Microcontroller Core Logic (regulator
disabled).
VREF-
3
28
20
I
ANA
A/D and Comparator Reference Voltage (low) Input.
VREF+
2
27
19
I
ANA
A/D and Comparator Reference Voltage (high) Input.
8, 27
5, 24
29, 39
P
—
VSS
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
DS39951C-page 18
Ground Reference for Logic and I/O Pins.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
• All VDD and VSS pins
(see Section 2.2 “Power Supply Pins”)
• All AVDD and AVSS pins, regardless of whether or
not the analog device features are used
(see Section 2.2 “Power Supply Pins”)
• MCLR pin
(see Section 2.3 “Master Clear (MCLR) Pin”)
• ENVREG/DISVREG and VCAP/VDDCORE pins
(PIC24FJ devices only)
(see Section 2.4 “Voltage Regulator Pins
(ENVREG/DISVREG and VCAP/VDDCORE)”)
These pins must also be connected if they are being
used in the end application:
• PGECx/PGEDx pins used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes
(see Section 2.5 “ICSP Pins”)
• OSCI and OSCO pins when an external oscillator
source is used
(see Section 2.6 “External Oscillator Pins”)
Additionally, the following pins may be required:
• VREF+/VREF- pins used when external voltage
reference for analog modules is implemented
Note:
VDD
R2
VSS
R1
(1) (1)
(EN/DIS)VREG
MCLR
VCAP/VDDCORE
C1
C7
PIC24FXXXX
C6(2)
VSS
VDD
VDD
VSS
C3(2)
C5(2)
VSS
The following pins must always be connected:
C2(2)
VDD
Getting started with the PIC24FJ64GA104 family of
16-bit microcontrollers requires attention to a minimal
set of device pin connections before proceeding with
development.
RECOMMENDED
MINIMUM CONNECTIONS
VDD
Basic Connection Requirements
FIGURE 2-1:
AVSS
2.1
GUIDELINES FOR GETTING
STARTED WITH 16-BIT
MICROCONTROLLERS
AVDD
2.0
C4(2)
Key (all values are recommendations):
C1 through C6: 0.1 F, 20V ceramic
C7: 10 F, 6.3V or greater, tantalum or ceramic
R1: 10 kΩ
R2: 100Ω to 470Ω
Note 1:
2:
See Section 2.4 “Voltage Regulator Pins
(ENVREG/DISVREG and VCAP/VDDCORE)”
for explanation of ENVREG/DISVREG pin
connections.
The example shown is for a PIC24F device
with five VDD/VSS and AVDD/AVSS pairs.
Other devices may have more or less pairs;
adjust the number of decoupling capacitors
appropriately.
The AVDD and AVSS pins must always be
connected, regardless of whether any of
the analog modules are being used.
The minimum mandatory connections are shown in
Figure 2-1.
 2010 Microchip Technology Inc.
DS39951C-page 19
PIC24FJ64GA104 FAMILY
2.2
2.2.1
Power Supply Pins
DECOUPLING CAPACITORS
The use of decoupling capacitors on every pair of
power supply pins, such as VDD, VSS, AVDD and
AVSS is required.
Consider the following criteria when using decoupling
capacitors:
• Value and type of capacitor: A 0.1 F (100 nF),
10-20V capacitor is recommended. The capacitor
should be a low-ESR device with a resonance
frequency in the range of 200 MHz and higher.
Ceramic capacitors are recommended.
• Placement on the printed circuit board: The
decoupling capacitors should be placed as close
to the pins as possible. It is recommended to
place the capacitors on the same side of the
board as the device. If space is constricted, the
capacitor can be placed on another layer on the
PCB using a via; however, ensure that the trace
length from the pin to the capacitor is no greater
than 0.25 inch (6 mm).
• Handling high-frequency noise: If the board is
experiencing high-frequency noise (upward of
tens of MHz), add a second ceramic type capacitor in parallel to the above described decoupling
capacitor. The value of the second capacitor can
be in the range of 0.01 F to 0.001 F. Place this
second capacitor next to each primary decoupling
capacitor. In high-speed circuit designs, consider
implementing a decade pair of capacitances as
close to the power and ground pins as possible
(e.g., 0.1 F in parallel with 0.001 F).
• Maximizing performance: On the board layout
from the power supply circuit, run the power and
return traces to the decoupling capacitors first,
and then to the device pins. This ensures that the
decoupling capacitors are first in the power chain.
Equally important is to keep the trace length
between the capacitor and the power pins to a
minimum, thereby reducing PCB trace
inductance.
2.2.2
TANK CAPACITORS
On boards with power traces running longer than six
inches in length, it is suggested to use a tank capacitor
for integrated circuits including microcontrollers to
supply a local power source. The value of the tank
capacitor should be determined based on the trace
resistance that connects the power supply source to
the device, and the maximum current drawn by the
device in the application. In other words, select the tank
capacitor so that it meets the acceptable voltage sag at
the device. Typical values range from 4.7 F to 47 F.
DS39951C-page 20
2.3
Master Clear (MCLR) Pin
The MCLR pin provides two specific device
functions: device Reset, and device programming
and debugging. If programming and debugging are
not required in the end application, a direct
connection to VDD may be all that is required. The
addition of other components, to help increase the
application’s resistance to spurious Resets from
voltage sags, may be beneficial. A typical
configuration is shown in Figure 2-1. Other circuit
designs may be implemented, depending on the
application’s requirements.
During programming and debugging, the resistance
and capacitance that can be added to the pin must
be considered. Device programmers and debuggers
drive the MCLR pin. Consequently, specific voltage
levels (VIH and VIL) and fast signal transitions must
not be adversely affected. Therefore, specific values
of R1 and C1 will need to be adjusted based on the
application and PCB requirements. For example, it is
recommended that the capacitor, C1, be isolated
from the MCLR pin during programming and
debugging operations by using a jumper (Figure 2-2).
The jumper is replaced for normal run-time
operations.
Any components associated with the MCLR pin
should be placed within 0.25 inch (6 mm) of the pin.
FIGURE 2-2:
EXAMPLE OF MCLR PIN
CONNECTIONS
VDD
R1
R2
JP
MCLR
PIC24FXXXX
C1
Note 1:
R1  10 k is recommended. A suggested
starting value is 10 k. Ensure that the
MCLR pin VIH and VIL specifications are met.
2:
R2  470 will limit any current flowing into
MCLR from the external capacitor, C, in the
event of MCLR pin breakdown, due to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS). Ensure that the MCLR pin
VIH and VIL specifications are met.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
Note:
Voltage Regulator Pins
(ENVREG/DISVREG and
VCAP/VDDCORE)
FIGURE 2-3:
The on-chip voltage regulator enable/disable pin
(ENVREG or DISVREG, depending on the device
family) must always be connected directly to either a
supply voltage or to ground. The particular connection
is determined by whether or not the regulator is to be
used:
• For ENVREG, tie to VDD to enable the regulator,
or to ground to disable the regulator
• For DISVREG, tie to ground to enable the
regulator or to VDD to disable the regulator
Refer to Section 25.2 “On-Chip Voltage Regulator”
for details on connecting and using the on-chip
regulator.
When the regulator is enabled, a low-ESR (<5Ω)
capacitor is required on the VCAP/VDDCORE pin to
stabilize the voltage regulator output voltage. The
VCAP/VDDCORE pin must not be connected to VDD, and
must use a capacitor of 10 F connected to ground. The
type can be ceramic or tantalum. A suitable example is
the Murata GRM21BF50J106ZE01 (10 F, 6.3V) or
equivalent. Designers may use Figure 2-3 to evaluate
ESR equivalence of candidate devices.
The placement of this capacitor should be close to
VCAP/VDDCORE. It is recommended that the trace
length not exceed 0.25 inch (6 mm). Refer to
Section 28.0 “Electrical Characteristics” for
additional information.
When the regulator is disabled, the VCAP/VDDCORE pin
must be tied to a voltage supply at the VDDCORE level.
Refer to Section 28.0 “Electrical Characteristics” for
information on VDD and VDDCORE.
FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED VCAP
10
This section applies only to PIC24FJ
devices with an on-chip voltage regulator.
1
ESR ()
2.4
0.1
0.01
0.001
0.01
Note:
2.5
0.1
1
10
100
Frequency (MHz)
1000 10,000
Data for Murata GRM21BF50J106ZE01 shown.
Measurements at 25°C, 0V DC bias.
ICSP Pins
The PGECx and PGEDx pins are used for In-Circuit
Serial Programming (ICSP) and debugging purposes.
It is recommended to keep the trace length between
the ICSP connector and the ICSP pins on the device as
short as possible. If the ICSP connector is expected to
experience an ESD event, a series resistor is recommended, with the value in the range of a few tens of
ohms, not to exceed 100Ω.
Pull-up resistors, series diodes and capacitors on the
PGECx and PGEDx pins are not recommended as they
will interfere with the programmer/debugger communications to the device. If such discrete components are
an application requirement, they should be removed
from the circuit during programming and debugging.
Alternatively, refer to the AC/DC characteristics and
timing requirements information in the respective
device Flash programming specification for information
on capacitive loading limits and pin input voltage high
(VIH) and input low (VIL) requirements.
For device emulation, ensure that the “Communication
Channel Select” (i.e., PGECx/PGEDx pins) programmed
into the device matches the physical connections for the
ICSP to the Microchip debugger/emulator tool.
For more information on available Microchip
development tools connection requirements, refer to
Section 26.0 “Development Support”.
 2010 Microchip Technology Inc.
DS39951C-page 21
PIC24FJ64GA104 FAMILY
2.6
External Oscillator Pins
FIGURE 2-4:
Many microcontrollers have options for at least two
oscillators: a high-frequency primary oscillator and a
low-frequency Secondary Oscillator (refer to
Section 8.0 “Oscillator Configuration” for details).
The oscillator circuit should be placed on the same
side of the board as the device. Place the oscillator
circuit close to the respective oscillator pins with no
more than 0.5 inch (12 mm) between the circuit
components and the pins. The load capacitors should
be placed next to the oscillator itself, on the same side
of the board.
Use a grounded copper pour around the oscillator circuit to isolate it from surrounding circuits. The
grounded copper pour should be routed directly to the
MCU ground. Do not run any signal traces or power
traces inside the ground pour. Also, if using a two-sided
board, avoid any traces on the other side of the board
where the crystal is placed.
Single-Sided and In-line Layouts:
Copper Pour
(tied to ground)
For additional information and design guidance on
oscillator circuits, please refer to these Microchip
Application Notes, available at the corporate web site
(www.microchip.com):
• AN826, “Crystal Oscillator Basics and Crystal
Selection for rfPIC™ and PICmicro® Devices”
• AN849, “Basic PICmicro® Oscillator Design”
• AN943, “Practical PICmicro® Oscillator Analysis
and Design”
• AN949, “Making Your Oscillator Work”
Primary Oscillator
Crystal
DEVICE PINS
Primary
Oscillator
OSCI
C1
`
OSCO
GND
C2
`
SOSCO
SOSC I
Secondary
Oscillator
Crystal
Layout suggestions are shown in Figure 2-4. In-line
packages may be handled with a single-sided layout
that completely encompasses the oscillator pins. With
fine-pitch packages, it is not always possible to completely surround the pins and components. A suitable
solution is to tie the broken guard sections to a mirrored
ground layer. In all cases, the guard trace(s) must be
returned to ground.
In planning the application’s routing and I/O assignments, ensure that adjacent port pins and other signals
in close proximity to the oscillator are benign (i.e., free
of high frequencies, short rise and fall times and other
similar noise).
SUGGESTED PLACEMENT
OF THE OSCILLATOR
CIRCUIT
`
Sec Oscillator: C1
Sec Oscillator: C2
Fine-Pitch (Dual-Sided) Layouts:
Top Layer Copper Pour
(tied to ground)
Bottom Layer
Copper Pour
(tied to ground)
OSCO
C2
Oscillator
Crystal
GND
C1
OSCI
DEVICE PINS
DS39951C-page 22
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
2.7
Configuration of Analog and
Digital Pins During ICSP
Operations
If an ICSP compliant emulator is selected as a debugger, it automatically initializes all of the A/D input pins
(ANx) as “digital” pins. Depending on the particular
device, this is done by setting all bits in the ADnPCFG
register(s), or clearing all bit in the ANSx registers.
All PIC24F devices will have either one or more
ADnPCFG registers or several ANSx registers (one for
each port); no device will have both. Refer to
Section 21.0 “10-Bit High-Speed A/D Converter”)
for more specific information.
The bits in these registers that correspond to the A/D
pins that initialized the emulator must not be changed
by the user application firmware; otherwise,
communication errors will result between the debugger
and the device.
If your application needs to use certain A/D pins as
analog input pins during the debug session, the user
application must modify the appropriate bits during
initialization of the ADC module, as follows:
• For devices with an ADnPCFG register, clear the
bits corresponding to the pin(s) to be configured
as analog. Do not change any other bits, particularly those corresponding to the PGECx/PGEDx
pair, at any time.
• For devices with ANSx registers, set the bits
corresponding to the pin(s) to be configured as
analog. Do not change any other bits, particularly
those corresponding to the PGECx/PGEDx pair,
at any time.
When a Microchip debugger/emulator is used as a
programmer, the user application firmware must
correctly configure the ADnPCFG or ANSx registers.
Automatic initialization of this register is only done
during debugger operation. Failure to correctly
configure the register(s) will result in all A/D pins being
recognized as analog input pins, resulting in the port
value being read as a logic '0', which may affect user
application functionality.
2.8
Unused I/Os
Unused I/O pins should be configured as outputs and
driven to a logic low state. Alternatively, connect a 1 kΩ
to 10 kΩ resistor to VSS on unused pins and drive the
output to logic low.
 2010 Microchip Technology Inc.
DS39951C-page 23
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 24
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
3.0
Note:
CPU
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 2. “CPU” (DS39703).
The PIC24F CPU has a 16-bit (data), modified Harvard
architecture with an enhanced instruction set and a
24-bit instruction word with a variable length opcode
field. The Program Counter (PC) is 23 bits wide and
addresses up to 4M instructions of user program
memory space. A single-cycle instruction prefetch
mechanism is used to help maintain throughput and
provides predictable execution. All instructions execute
in a single cycle, with the exception of instructions that
change the program flow, the double-word move
(MOV.D) instruction and the table instructions.
Overhead-free program loop constructs are supported
using the REPEAT instructions, which are interruptible at
any point.
PIC24F devices have sixteen, 16-bit working registers
in the programmer’s model. Each of the working
registers can act as a data, address or address offset
register. The 16th working register (W15) operates as
a Software Stack Pointer for interrupts and calls.
The upper 32 Kbytes of the data space memory map
can optionally be mapped into program space at any
16K word boundary defined by the 8-bit Program Space
Visibility Page Address (PSVPAG) register. The program
to data space mapping feature lets any instruction
access program space as if it were data space.
The Instruction Set Architecture (ISA) has been
significantly enhanced beyond that of the PIC18, but
maintains an acceptable level of backward compatibility.
All PIC18 instructions and addressing modes are
supported either directly or through simple macros.
Many of the ISA enhancements have been driven by
compiler efficiency needs.
For most instructions, the core is capable of executing
a data (or program data) memory read, a working register (data) read, a data memory write and a program
(instruction) memory read per instruction cycle. As a
result, three parameter instructions can be supported,
allowing trinary operations (that is, A + B = C) to be
executed in a single cycle.
A high-speed, 17-bit by 17-bit multiplier has been
included to significantly enhance the core arithmetic
capability and throughput. The multiplier supports
Signed, Unsigned and Mixed mode, 16-bit by 16-bit or
8-bit by 8-bit integer multiplication. All multiply
instructions execute in a single cycle.
The 16-bit ALU has been enhanced with integer divide
assist hardware that supports an iterative non-restoring
divide algorithm. It operates in conjunction with the
REPEAT instruction looping mechanism and a selection
of iterative divide instructions to support 32-bit (or
16-bit), divided by 16-bit, integer signed and unsigned
division. All divide operations require 19 cycles to
complete, but are interruptible at any cycle boundary.
The PIC24F has a vectored exception scheme with up
to 8 sources of non-maskable traps and up to 118 interrupt sources. Each interrupt source can be assigned to
one of seven priority levels.
A block diagram of the CPU is shown in Figure 3-1.
3.1
Programmer’s Model
The programmer’s model for the PIC24F is shown in
Figure 3-2. All registers in the programmer’s model are
memory mapped and can be manipulated directly by
instructions. A description of each register is provided
in Table 3-1. All registers associated with the
programmer’s model are memory mapped.
The core supports Inherent (no operand), Relative,
Literal, Memory Direct and three groups of addressing
modes. All modes support Register Direct and various
Register Indirect modes. Each group offers up to seven
addressing modes. Instructions are associated with
predefined addressing modes depending upon their
functional requirements.
 2010 Microchip Technology Inc.
DS39951C-page 25
PIC24FJ64GA104 FAMILY
FIGURE 3-1:
PIC24F CPU CORE BLOCK DIAGRAM
PSV & Table
Data Access
Control Block
Data Bus
Interrupt
Controller
16
8
16
16
Data Latch
23
23
PCH
PCL
Program Counter
Loop
Stack
Control
Control
Logic
Logic
16
Data RAM
Address
Latch
23
16
RAGU
WAGU
Address Latch
Program Memory
EA MUX
Address Bus
Data Latch
ROM Latch
24
Control Signals
to Various Blocks
Instruction Reg
Hardware
Multiplier
Divide
Support
16
Literal Data
Instruction
Decode &
Control
16
16 x 16
W Register Array
16
16-Bit ALU
16
To Peripheral Modules
DS39951C-page 26
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 3-1:
CPU CORE REGISTERS
Register(s) Name
Description
W0 through W15
Working Register Array
PC
23-Bit Program Counter
SR
ALU STATUS Register
SPLIM
Stack Pointer Limit Value Register
TBLPAG
Table Memory Page Address Register
PSVPAG
Program Space Visibility Page Address Register
RCOUNT
Repeat Loop Counter Register
CORCON
CPU Control Register
FIGURE 3-2:
PROGRAMMER’S MODEL
15
Divider Working Registers
0
W0 (WREG)
W1
W2
Multiplier Registers
W3
W4
W5
W6
W7
Working/Address
Registers
W8
W9
W10
W11
W12
W13
W14
Frame Pointer
W15
Stack Pointer
0
SPLIM
0
22
0
0
PC
7
0
TBLPAG
7
0
PSVPAG
15
0
RCOUNT
SRH
SRL
— — — — — — — DC
IPL
2 1 0 RA N OV Z C
15
15
Stack Pointer Limit
Value Register
Program Counter
Table Memory Page
Address Register
Program Space Visibility
Page Address Register
Repeat Loop Counter
Register
0
ALU STATUS Register (SR)
0
— — — — — — — — — — — — IPL3 PSV — —
CPU Control Register (CORCON)
Registers or bits shaded for PUSH.S and POP.S instructions.
 2010 Microchip Technology Inc.
DS39951C-page 27
PIC24FJ64GA104 FAMILY
3.2
CPU Control Registers
REGISTER 3-1:
SR: ALU STATUS REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0
—
—
—
—
—
—
—
DC
bit 15
bit 8
R/W-0(1)
IPL2
R/W-0(1)
(2)
IPL1
(2)
R/W-0(1)
R-0
R/W-0
R/W-0
R/W-0
R/W-0
IPL0(2)
RA
N
OV
Z
C
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-9
Unimplemented: Read as ‘0’
bit 8
DC: ALU Half Carry/Borrow bit
1 = A carry out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized data)
of the result occurred
0 = No carry out from the 4th or 8th low-order bit of the result has occurred
bit 7-5
IPL<2:0>: CPU Interrupt Priority Level Status bits(1,2)
111 = CPU interrupt priority level is 7 (15); user interrupts disabled
110 = CPU interrupt priority level is 6 (14)
101 = CPU interrupt priority level is 5 (13)
100 = CPU interrupt priority level is 4 (12)
011 = CPU interrupt priority level is 3 (11)
010 = CPU interrupt priority level is 2 (10)
001 = CPU interrupt priority level is 1 (9)
000 = CPU interrupt priority level is 0 (8)
bit 4
RA: REPEAT Loop Active bit
1 = REPEAT loop in progress
0 = REPEAT loop not in progress
bit 3
N: ALU Negative bit
1 = Result was negative
0 = Result was non-negative (zero or positive)
bit 2
OV: ALU Overflow bit
1 = Overflow occurred for signed (2’s complement) arithmetic in this arithmetic operation
0 = No overflow has occurred
bit 1
Z: ALU Zero bit
1 = An operation which effects the Z bit has set it at some time in the past
0 = The most recent operation which effects the Z bit has cleared it (i.e., a non-zero result)
bit 0
C: ALU Carry/Borrow bit
1 = A carry out from the Most Significant bit of the result occurred
0 = No carry out from the Most Significant bit of the result occurred
Note 1:
2:
The IPL Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
The IPL Status bits are concatenated with the IPL3 bit (CORCON<3>) to form the CPU Interrupt Priority
Level (IPL). The value in parentheses indicates the IPL when IPL3 = 1.
DS39951C-page 28
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 3-2:
CORCON: CPU CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
—
U-0
—
—
U-0
R/C-0
(1)
—
IPL3
R/W-0
U-0
U-0
PSV
—
—
bit 7
bit 0
Legend:
C = Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-4
Unimplemented: Read as ‘0’
bit 3
IPL3: CPU Interrupt Priority Level Status bit(1)
1 = CPU interrupt priority level is greater than 7
0 = CPU interrupt priority level is 7 or less
bit 2
PSV: Program Space Visibility in Data Space Enable bit
1 = Program space visible in data space
0 = Program space not visible in data space
bit 1-0
Unimplemented: Read as ‘0’
Note 1:
3.3
x = Bit is unknown
User interrupts are disabled when IPL3 = 1.
Arithmetic Logic Unit (ALU)
The PIC24F ALU is 16 bits wide and is capable of addition, subtraction, bit shifts and logic operations. Unless
otherwise mentioned, arithmetic operations are 2’s
complement in nature. Depending on the operation, the
ALU may affect the values of the Carry (C), Zero (Z),
Negative (N), Overflow (OV) and Digit Carry (DC)
Status bits in the SR register. The C and DC Status bits
operate as Borrow and Digit Borrow bits, respectively,
for subtraction operations.
The ALU can perform 8-bit or 16-bit operations,
depending on the mode of the instruction that is used.
Data for the ALU operation can come from the W
register array, or data memory, depending on the
addressing mode of the instruction. Likewise, output
data from the ALU can be written to the W register array
or a data memory location.
 2010 Microchip Technology Inc.
The PIC24F CPU incorporates hardware support for
both multiplication and division. This includes a
dedicated hardware multiplier and support hardware
for 16-bit divisor division.
3.3.1
MULTIPLIER
The ALU contains a high-speed, 17-bit x 17-bit
multiplier. It supports unsigned, signed or mixed sign
operation in several multiplication modes:
1.
2.
3.
4.
5.
6.
7.
16-bit x 16-bit signed
16-bit x 16-bit unsigned
16-bit signed x 5-bit (literal) unsigned
16-bit unsigned x 16-bit unsigned
16-bit unsigned x 5-bit (literal) unsigned
16-bit unsigned x 16-bit signed
8-bit unsigned x 8-bit unsigned
DS39951C-page 29
PIC24FJ64GA104 FAMILY
3.3.2
DIVIDER
3.3.3
The divide block supports signed and unsigned integer
divide operations with the following data sizes:
1.
2.
3.
4.
32-bit signed/16-bit signed divide
32-bit unsigned/16-bit unsigned divide
16-bit signed/16-bit signed divide
16-bit unsigned/16-bit unsigned divide
The quotient for all divide instructions ends up in W0
and the remainder in W1. Sixteen-bit signed and
unsigned DIV instructions can specify any W register
for both the 16-bit divisor (Wn), and any W register
(aligned) pair (W(m + 1):Wm) for the 32-bit dividend.
The divide algorithm takes one cycle per bit of divisor,
so both 32-bit/16-bit and 16-bit/16-bit instructions take
the same number of cycles to execute.
TABLE 3-2:
Instruction
MULTI-BIT SHIFT SUPPORT
The PIC24F ALU supports both single bit and
single-cycle, multi-bit arithmetic and logic shifts.
Multi-bit shifts are implemented using a shifter block,
capable of performing up to a 15-bit arithmetic right
shift, or up to a 15-bit left shift, in a single cycle. All
multi-bit shift instructions only support Register Direct
Addressing for both the operand source and result
destination.
A full summary of instructions that use the shift
operation is provided below in Table 3-2.
INSTRUCTIONS THAT USE THE SINGLE AND MULTI-BIT SHIFT OPERATION
Description
ASR
Arithmetic shift right source register by one or more bits.
SL
Shift left source register by one or more bits.
LSR
Logical shift right source register by one or more bits.
DS39951C-page 30
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
4.0
MEMORY ORGANIZATION
As Harvard architecture devices, PIC24F microcontrollers feature separate program and data memory
spaces and busses. This architecture also allows the
direct access of program memory from the data space
during code execution.
4.1
Program Address Space
The program address memory space of the
PIC24FJ64GA104 family devices is 4M instructions.
The space is addressable by a 24-bit value derived
FIGURE 4-1:
from either the 23-bit Program Counter (PC) during program execution, or from table operation or data space
remapping, as described in Section 4.3 “Interfacing
Program and Data Memory Spaces”.
User access to the program memory space is restricted
to the lower half of the address range (000000h to
7FFFFFh). The exception is the use of TBLRD/TBLWT
operations which use TBLPAG<7> to permit access to
the Configuration bits and Device ID sections of the
configuration memory space.
Memory maps for the PIC24FJ64GA104 family of
devices are shown in Figure 4-1.
PROGRAM SPACE MEMORY MAP FOR PIC24FJ64GA104 FAMILY DEVICES
PIC24FJ32GA10X
PIC24FJ64GA10X
GOTO Instruction
Reset Address
Interrupt Vector Table
GOTO Instruction
Reset Address
Interrupt Vector Table
Reserved
Reserved
Alternate Vector Table
Alternate Vector Table
000000h
000002h
000004h
0000FEh
000100h
000104h
0001FEh
000200h
User Memory Space
User Flash
Program Memory
(11K instructions)
Flash Config Words
User Flash
Program Memory
(22K instructions)
Flash Config Words
Unimplemented
Read ‘0’
0057FEh
005800h
00ABFEh
00AC00h
Unimplemented
Read ‘0’
Configuration Memory Space
7FFFFFh
800000h
Reserved
Reserved
Device Config Registers
Device Config Registers
Reserved
Reserved
DEVID (2)
DEVID (2)
F7FFFEh
F80000h
F8000Eh
F80010h
FEFFFEh
FF0000h
FFFFFFh
Note:
Memory areas are not shown to scale.
 2010 Microchip Technology Inc.
DS39951C-page 31
PIC24FJ64GA104 FAMILY
4.1.1
PROGRAM MEMORY
ORGANIZATION
4.1.3
In PIC24FJ64GA104 family devices, the top four words
of on-chip program memory are reserved for configuration information. On device Reset, the configuration
information is copied into the appropriate Configuration
registers. The addresses of the Flash Configuration
Word for devices in the PIC24FJ64GA104 family are
shown in Table 4-1. Their location in the memory map
is shown with the other memory vectors in Figure 4-1.
The program memory space is organized in
word-addressable blocks. Although it is treated as
24 bits wide, it is more appropriate to think of each
address of the program memory as a lower and upper
word, with the upper byte of the upper word being
unimplemented. The lower word always has an even
address, while the upper word has an odd address
(Figure 4-2).
The Configuration Words in program memory are a
compact format. The actual Configuration bits are
mapped in several different registers in the configuration
memory space. Their order in the Flash Configuration
Words do not reflect a corresponding arrangement in the
configuration space. Additional details on the device
Configuration Words are provided in Section 25.1
“Configuration Bits”.
Program memory addresses are always word-aligned
on the lower word and addresses are incremented or
decremented by two during code execution. This
arrangement also provides compatibility with data
memory space addressing and makes it possible to
access data in the program memory space.
4.1.2
HARD MEMORY VECTORS
TABLE 4-1:
All PIC24F devices reserve the addresses between
00000h and 000200h for hard coded program execution vectors. A hardware Reset vector is provided to
redirect code execution from the default value of the
PC on device Reset to the actual start of code. A GOTO
instruction is programmed by the user at 000000h with
the actual address for the start of code at 000002h.
PIC24F devices also have two interrupt vector tables,
located from 000004h to 0000FFh and 000100h to
0001FFh. These vector tables allow each of the many
device interrupt sources to be handled by separate
ISRs. A more detailed discussion of the interrupt vector
tables is provided in Section 7.1 “Interrupt Vector
Table”.
FIGURE 4-2:
MSW
Address
Device
Program
Memory
(Words)
Configuration
Word
Addresses
PIC24FJ32GA1
11,008
0057F8h:
0057FEh
PIC24FJ64GA1
22,016
00ABF8h:
00ABFEh
least significant word
most significant word
16
8
PC Address
(LSW Address)
0
000000h
000002h
000004h
000006h
00000000
00000000
00000000
00000000
Program Memory
‘Phantom’ Byte
(read as ‘0’)
DS39951C-page 32
FLASH CONFIGURATION
WORDS FOR PIC24FJ64GA104
FAMILY DEVICES
PROGRAM MEMORY ORGANIZATION
23
000001h
000003h
000005h
000007h
FLASH CONFIGURATION WORDS
Instruction Width
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
4.2
Data Address Space
The PIC24F core has a separate, 16-bit wide data memory space, addressable as a single linear range. The
data space is accessed using two Address Generation
Units (AGUs), one each for read and write operations.
The data space memory map is shown in Figure 4-3.
All Effective Addresses (EAs) in the data memory space
are 16 bits wide and point to bytes within the data space.
This gives a data space address range of 64 Kbytes or
32K words. The lower half of the data memory space
(that is, when EA<15> = 0) is used for implemented
memory addresses, while the upper half (EA<15> = 1) is
reserved for the program space visibility area (see
Section 4.3.3 “Reading Data from Program Memory
Using Program Space Visibility”).
FIGURE 4-3:
PIC24FJ64GA104 family devices implement a total of
16 Kbytes of data memory. Should an EA point to a
location outside of this area, an all zero word or byte will
be returned.
4.2.1
DATA SPACE WIDTH
The data memory space is organized in
byte-addressable, 16-bit wide blocks. Data is aligned
in data memory and registers as 16-bit words, but all
data space EAs resolve to bytes. The Least Significant
Bytes (LSBs) of each word have even addresses, while
the Most Significant Bytes (MSBs) have odd
addresses.
DATA SPACE MEMORY MAP FOR PIC24FJ64GA104 FAMILY DEVICES
MSB
Address
0001h
07FFh
0801h
Implemented
Data RAM
1FFFh
2001h
MSB
LSB
SFR Space
Data RAM
27FFh
2801h
LSB
Address
0000h
07FEh
0800h
SFR
Space
Near
Data Space
1FFEh
2000h
27FEh
2800h
Unimplemented
Read as ‘0’
7FFFh
8001h
7FFFh
8000h
Program Space
Visibility Area
FFFFh
Note:
FFFEh
Data memory areas are not shown to scale.
 2010 Microchip Technology Inc.
DS39951C-page 33
PIC24FJ64GA104 FAMILY
4.2.2
DATA MEMORY ORGANIZATION
AND ALIGNMENT
A Sign-Extend (SE) instruction is provided to allow
users to translate 8-bit signed data to 16-bit signed
values. Alternatively, for 16-bit unsigned data, users
can clear the MSB of any W register by executing a
Zero-Extend (ZE) instruction on the appropriate
address.
To maintain backward compatibility with PIC® devices
and improve data space memory usage efficiency, the
PIC24F instruction set supports both word and byte
operations. As a consequence of byte accessibility, all
Effective Address calculations are internally scaled to
step through word-aligned memory. For example, the
core recognizes that Post-Modified Register Indirect
Addressing mode [Ws++] will result in a value of Ws + 1
for byte operations and Ws + 2 for word operations.
Although most instructions are capable of operating on
word or byte data sizes, it should be noted that some
instructions operate only on words.
4.2.3
The 8-Kbyte area between 0000h and 1FFFh is
referred to as the near data space. Locations in this
space are directly addressable via a 13-bit absolute
address field within all memory direct instructions. The
remainder of the data space is indirectly addressable.
Additionally, the whole data space is addressable using
MOV instructions, which support Memory Direct
Addressing with a 16-bit address field.
Data byte reads will read the complete word which contains the byte using the LSb of any EA to determine
which byte to select. The selected byte is placed onto
the LSB of the data path. That is, data memory and registers are organized as two parallel, byte-wide entities
with shared (word) address decode, but separate write
lines. Data byte writes only write to the corresponding
side of the array or register which matches the byte
address.
4.2.4
All word accesses must be aligned to an even address.
Misaligned word data fetches are not supported, so
care must be taken when mixing byte and word
operations or translating from 8-bit MCU code. If a
misaligned read or write is attempted, an address error
trap will be generated. If the error occurred on a read,
the instruction underway is completed; if it occurred on
a write, the instruction will be executed but the write will
not occur. In either case, a trap is then executed, allowing the system and/or user to examine the machine
state prior to execution of the address Fault.
SFR SPACE
The first 2 Kbytes of the near data space, from 0000h
to 07FFh, are primarily occupied with Special Function
Registers (SFRs). These are used by the PIC24F core
and peripheral modules for controlling the operation of
the device.
SFRs are distributed among the modules that they
control and are generally grouped together by module.
Much of the SFR space contains unused addresses;
these are read as ‘0’. A diagram of the SFR space,
showing where SFRs are actually implemented, is
shown in Table 4-2. Each implemented area indicates
a 32-byte region where at least one address is
implemented as an SFR. A complete listing of
implemented SFRs, including their addresses, is
shown in Tables 4-3 through 4-26.
All byte loads into any W register are loaded into the
Least Significant Byte. The Most Significant Byte is not
modified.
TABLE 4-2:
NEAR DATA SPACE
IMPLEMENTED REGIONS OF SFR DATA SPACE
SFR Space Address
xx00
xx20
000h
xx60
Core
100h
200h
xx40
ICN
Timers
I2
C™
xx80
Capture
xxA0
xxC0
xxE0
Interrupts
—
Compare
—
UART
SPI
—
—
—
300h
A/D
A/D/CTMU
—
—
—
—
—
—
400h
—
—
—
—
—
—
—
—
500h
—
—
—
—
—
—
—
—
600h
PMP
RTCC
700h
—
—
CRC/Comp Comparators
System/DS
NVM/PMD
I/O
PPS
—
—
—
—
—
Legend: — = No implemented SFRs in this block
DS39951C-page 34
 2010 Microchip Technology Inc.
 2010 Microchip Technology Inc.
TABLE 4-3:
CPU CORE REGISTERS MAP
Addr
WREG0
0000
Working Register 0
0000
WREG1
0002
Working Register 1
0000
WREG2
0004
Working Register 2
0000
WREG3
0006
Working Register 3
0000
WREG4
0008
Working Register 4
0000
WREG5
000A
Working Register 5
0000
WREG6
000C
Working Register 6
0000
WREG7
000E
Working Register 7
0000
WREG8
0010
Working Register 8
0000
WREG9
0012
Working Register 9
0000
WREG10
0014
Working Register 10
0000
WREG11
0016
Working Register 11
0000
WREG12
0018
Working Register 12
0000
WREG13
001A
Working Register 13
0000
WREG14
001C
Working Register 14
0000
WREG15
001E
Working Register 15
0800
SPLIM
0020
Stack Pointer Limit Value Register
xxxx
PCL
002E
Program Counter Low Word Register
PCH
0030
—
—
—
—
—
—
—
—
TBLPAG
0032
—
—
—
—
—
—
—
PSVPAG
0034
—
—
—
—
—
—
—
RCOUNT
0036
SR
0042
—
—
—
—
—
—
—
DC
IPL2
IPL1
IPL0
RA
N
OV
Z
C
CORCON
0044
—
—
—
—
—
—
—
—
—
—
—
—
IPL3
PSV
—
—
DISICNT
0052
—
—
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
0000
Program Counter Register High Byte
0000
—
Table Memory Page Address Register
0000
—
Program Space Visibility Page Address Register
0000
Repeat Loop Counter Register
xxxx
Disable Interrupts Counter Register
0000
0000
xxxx
DS39951C-page 35
PIC24FJ64GA104 FAMILY
File
Name
ICN REGISTER MAP
File
Addr
Name
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
CNEN1 0060
CN15IE
CN14IE
CN13IE
CN12IE
CN11IE
CN10IE(1)
CN9IE(1)
CN27IE
(1)
CNEN2 0062
—
Legend:
Note
1:
—
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
CN8IE(1)
CN7IE
CN6IE
CN5IE
CN4IE
CN3IE
CN2IE
CN1IE
CN0IE
0000
CN24IE
CN23IE
CN22IE
CN21IE
CN20IE(1)
CN19IE(1)
CN18IE(1)
CN17IE(1)
CN16IE
0000
CN11PUE CN10PUE(1) CN9PUE(1) CN8PUE(1) CN7PUE
CN6PUE
CN5PUE
CN4PUE
CN3PUE
CN2PUE
CN1PUE
CN0PUE
0000
CN30PUE CN29PUE CN28PUE(1) CN27PUE CN26PUE(1) CN25PUE(1) CN24PUE CN23PUE CN22PUE CN21PUE CN20PUE(1) CN19PUE(1) CN18PUE(1) CN17PUE(1) CN16PUE
0000
CN30IE
CN29IE
CNPU1 0068 CN15PUE CN14PUE CN13PUE
CNPU2 006A
Bit 8
(1)
CN28IE
CN12PUE
CN26IE
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Unimplemented in 28-pin devices; read as ‘0’.
(1)
CN25IE
PIC24FJ64GA104 FAMILY
DS39951C-page 36
TABLE 4-4:
 2010 Microchip Technology Inc.
 2010 Microchip Technology Inc.
TABLE 4-5:
File Name Addr
INTERRUPT CONTROLLER REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 0
All
Resets
0000
0080
NSTDIS
—
—
—
—
—
—
—
—
—
—
OSCFAIL
—
0082
ALTIVT
DISI
—
—
—
—
—
—
—
—
—
—
—
INT2EP
INT1EP
INT0EP
0000
IFS0
0084
—
—
AD1IF
U1TXIF
U1RXIF
SPI1IF
SPF1IF
T3IF
T2IF
OC2IF
IC2IF
—
T1IF
OC1IF
IC1IF
INT0IF
0000
IFS1
0086
U2TXIF
U2RXIF
INT2IF
T5IF
T4IF
OC4IF
OC3IF
—
—
—
—
INT1IF
CNIF
CMIF
MI2C1IF
SI2C1IF
0000
IFS2
0088
—
—
PMPIF
—
—
—
OC5IF
—
IC5IF
IC4IF
IC3IF
—
—
—
SPI2IF
SPF2IF
0000
IFS3
008A
—
RTCIF
—
—
—
—
—
—
—
—
—
—
—
MI2C2IF
SI2C2IF
—
0000
IFS4
008C
—
—
CTMUIF
—
—
—
—
LVDIF
—
—
—
—
CRCIF
U2ERIF
U1ERIF
—
0000
IEC0
0094
—
—
AD1IE
U1TXIE
U1RXIE
SPI1IE
SPF1IE
T3IE
T2IE
OC2IE
IC2IE
—
T1IE
OC1IE
IC1IE
INT0IE
0000
IEC1
0096
U2TXIE
U2RXIE
INT2IE
T5IE
T4IE
OC4IE
OC3IE
—
—
—
—
INT1IE
CNIE
CMIE
MI2C1IE
SI2C1IE
0000
IEC2
0098
—
—
PMPIE
—
—
—
OC5IE
—
IC5IE
IC4IE
IC3IE
—
—
—
SPI2IE
SPF2IE
0000
IEC3
009A
—
RTCIE
—
—
—
—
—
—
—
—
—
—
—
MI2C2IE
SI2C2IE
—
0000
IEC4
009C
—
—
CTMUIE
—
—
—
—
LVDIE
—
—
—
—
CRCIE
U2ERIE
U1ERIE
—
0000
IPC0
00A4
—
T1IP2
T1IP1
T1IP0
—
OC1IP2
OC1IP1
OC1IP0
—
IC1IP2
IC1IP1
IC1IP0
—
INT0IP2
INT0IP1
INT0IP0
4444
IPC1
00A6
—
T2IP2
T2IP1
T2IP0
—
OC2IP2
OC2IP1
OC2IP0
—
IC2IP2
IC2IP1
IC2IP0
—
—
—
—
4440
IPC2
00A8
—
—
SPI1IP2
SPI1IP1
SPI1IP0
—
SPF1IP2
SPF1IP1
SPF1IP0
—
T3IP2
T3IP1
T3IP0
4444
IPC3
00AA
—
—
—
—
—
—
—
—
—
AD1IP2
AD1IP1
AD1IP0
—
U1TXIP2
U1TXIP1
U1TXIP0
0044
IPC4
00AC
—
CNIP2
CNIP1
CNIP0
—
CMIP2
CMIP1
CMIP0
—
—
SI2C1IP2 SI2C1IP1
SI2C1IP0
4444
IPC5
00AE
—
—
—
—
—
—
—
—
—
—
—
—
—
INT1IP2
INT1IP1
INT1IP0
0004
IPC6
00B0
—
T4IP2
T4IP1
T4IP0
—
OC4IP2
OC4IP1
OC4IP0
—
OC3IP2
OC3IP1
OC3IP0
—
—
—
—
4440
IPC7
00B2
—
U2TXIP2
U2TXIP1
U2TXIP0
—
U2RXIP2 U2RXIP1 U2RXIP0
—
INT2IP2
INT2IP1
INT2IP0
—
T5IP2
T5IP1
T5IP0
4444
IPC8
00B4
—
—
—
—
—
—
—
—
—
SPI2IP2
SPI2IP1
SPI2IP0
—
SPF2IP2
SPF2IP1
SPF2IP0
0044
IPC9
00B6
—
IC5IP2
IC5IP1
IC5IP0
—
IC4IP2
IC4IP1
IC4IP0
—
IC3IP2
IC3IP1
IC3IP0
—
—
—
—
4440
IPC10
00B8
—
—
—
—
—
—
—
—
—
OC5IP2
OC5IP1
OC5IP0
—
—
—
—
0040
IPC11
00BA
—
—
—
—
—
—
—
—
—
PMPIP2
PMPIP1
PMPIP0
—
—
—
—
0040
IPC12
00BC
—
—
—
—
—
—
SI2C2IP2 SI2C2IP1
SI2C2IP0
—
—
—
—
0440
IPC15
00C2
—
—
—
—
—
IPC16
00C4
—
CRCIP2
CRCIP1
CRCIP0
—
IPC18
00C8
—
—
—
—
—
—
—
IPC19
00CA
—
—
—
—
—
—
INTTREG
00E0
CPUIRQ
—
VHOLD
—
ILR3
ILR2
Legend:
MI2C2IP2 MI2C2IP1 MI2C2IP0
RTCIP2
RTCIP1
RTCIP0
—
—
—
—
—
—
—
—
0400
—
U1ERIP2
U1ERIP1
U1ERIP0
—
—
—
—
4440
—
—
—
—
—
—
LVDIP2
LVDIP1
LVDIP0
0004
—
—
—
CTMUIP2 CTMUIP1 CTMUIP0
—
—
—
—
0040
ILR1
ILR0
—
VECNUM6 VECNUM5 VECNUM4 VECNUM3 VECNUM2 VECNUM1 VECNUM0
U2ERIP2 U2ERIP1 U2ERIP0
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
MI2C1IP2 MI2C1IP1 MI2C1IP0
0000
DS39951C-page 37
PIC24FJ64GA104 FAMILY
INTCON1
INTCON2
U1RXIP2 U1RXIP1 U1RXIP0
MATHERR ADDRERR STKERR
Bit 1
File Name
Addr
TIMER REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
TMR1
0100
Timer1 Register
PR1
0102
Timer1 Period Register
T1CON
0104
TON
—
TSIDL
—
—
—
—
—
—
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
0000
FFFF
TGATE
TCKPS1
TCKPS0
—
TSYNC
TCS
—
0000
TMR2
0106
Timer2 Register
0000
TMR3HLD
0108
Timer3 Holding Register (for 32-bit timer operations only)
0000
TMR3
010A
Timer3 Register
0000
PR2
010C
Timer2 Period Register
FFFF
PR3
010E
Timer3 Period Register
T2CON
0110
TON
—
TSIDL
—
—
—
—
T3CON
0112
TON
—
TSIDL
—
—
—
—
TMR4
0114
Timer4 Register
0000
TMR5HLD
0116
Timer5 Holding Register (for 32-bit operations only)
0000
TMR5
0118
Timer5 Register
0000
PR4
011A
Timer4 Period Register
FFFF
PR5
011C
Timer5 Period Register
T4CON
011E
TON
—
TSIDL
—
—
—
—
—
—
TGATE
TCKPS1
TCKPS0
T32
—
TCS
—
0000
T5CON
0120
TON
—
TSIDL
—
—
—
—
—
—
TGATE
TCKPS1
TCKPS0
—
—
TCS
—
0000
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
FFFF
—
—
TGATE
TCKPS1
TCKPS0
T32
—
TCS
—
0000
—
—
TGATE
TCKPS1
TCKPS0
—
—
TCS
—
0000
FFFF
PIC24FJ64GA104 FAMILY
DS39951C-page 38
TABLE 4-6:
 2010 Microchip Technology Inc.
 2010 Microchip Technology Inc.
TABLE 4-7:
File
Name
INPUT CAPTURE REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
IC1CON1
0140
—
—
ICSIDL
IC1CON2
0142
—
—
—
Bit 12
Bit 11
Bit 10
ICTSEL2 ICTSEL1 ICTSEL0
—
—
—
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
—
—
—
ICI1
ICI0
—
IC32
ICTRIG
TRIGSTAT
—
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
ICOV
ICBNE
ICM2
ICM1
ICM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
IC1BUF
0144
Input Capture 1 Buffer Register
IC1TMR
0146
Timer Value 1 Register
IC2CON1
0148
—
—
ICSIDL
IC2CON2
014A
—
—
—
IC2BUF
014C
Input Capture 2 Buffer Register
IC2TMR
014E
Timer Value 2 Register
IC3CON1
0150
—
—
ICSIDL
IC3CON2
0152
—
—
—
IC3BUF
0154
Input Capture 3 Buffer Register
IC3TMR
0156
Timer Value 3 Register
IC4CON1
0158
—
—
ICSIDL
IC4CON2
015A
—
—
—
IC4BUF
015C
Input Capture 4 Buffer Register
IC4TMR
015E
Timer Value 4 Register
IC5CON1
0160
—
—
ICSIDL
IC5CON2
0162
—
—
—
IC5BUF
0164
Input Capture 5 Buffer Register
0000
IC5TMR
0166
Timer Value 5 Register
xxxx
—
—
—
ICTSEL2 ICTSEL1 ICTSEL0
—
—
—
ICTSEL2 ICTSEL1 ICTSEL0
—
—
—
ICTSEL2 ICTSEL1 ICTSEL0
—
—
—
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
—
—
—
—
—
—
—
—
xxxx
—
—
ICI1
ICI0
IC32
ICTRIG
TRIGSTAT
—
ICOV
ICBNE
ICM2
ICM1
ICM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
0000
xxxx
—
—
ICI1
ICI0
IC32
ICTRIG
TRIGSTAT
—
ICOV
ICBNE
ICM2
ICM1
ICM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
0000
xxxx
—
—
ICI1
ICI0
IC32
ICTRIG
TRIGSTAT
—
ICOV
ICBNE
ICM2
ICM1
ICM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
0000
xxxx
—
—
ICI1
ICI0
IC32
ICTRIG
TRIGSTAT
—
ICOV
ICBNE
ICM2
ICM1
ICM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
DS39951C-page 39
PIC24FJ64GA104 FAMILY
Legend:
ICTSEL2 ICTSEL1 ICTSEL0
0000
File Name
Addr
OUTPUT COMPARE REGISTER MAP
Bit 15
Bit 14
Bit 13
—
OCSIDL
Bit 12
Bit 11
Bit 10
Bit 8
ENFLT2
ENFLT1
DCB0
OC32
Bit 7
Bit 6
Bit 5
ENFLT0
OCFLT2
OCFLT1
OCTRIG
TRIGSTAT
OCTRIS
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
OCFLT0
TRIGMODE
OCM2
OCM1
OCM0
0000
OC1CON1
0190
—
OC1CON2
0192
FLTMD
OC1RS
0194
Output Compare 1 Secondary Register
0000
OC1R
0196
Output Compare 1 Register
0000
OC1TMR
0198
Timer Value 1 Register
OC2CON1
019A
—
OC2CON2
019C
FLTMD
OC2RS
019E
Output Compare 2 Secondary Register
0000
OC2R
01A0
Output Compare 2 Register
0000
OC2TMR
01A2
Timer Value 2 Register
OC3CON1
01A4
—
OC3CON2
01A6
FLTMD
FLTOUT FLTTRIEN
—
OCSIDL
FLTOUT FLTTRIEN
—
OCSIDL
FLTOUT FLTTRIEN
OCTSEL2 OCTSEL1 OCTSEL0
Bit 9
OCINV
—
DCB1
OCTSEL2 OCTSEL1 OCTSEL0
OCINV
—
OCTSEL2 OCTSEL1 OCTSEL0
OCINV
—
xxxx
ENFLT2
ENFLT1
ENFLT0
OCFLT2
OCFLT1
DCB0
OC32
OCTRIG
TRIGSTAT
OCTRIS
DCB1
OCFLT0
TRIGMODE
OCM2
OCM1
OCM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000C
xxxx
ENFLT2
ENFLT1
ENFLT0
OCFLT2
OCFLT1
DCB0
OC32
OCTRIG
TRIGSTAT
OCTRIS
DCB1
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000C
OCFLT0
TRIGMODE
OCM2
OCM1
OCM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000C
OC3RS
01A8
Output Compare 3 Secondary Register
0000
OC3R
01AA
Output Compare 3 Register
0000
OC3TMR
01AC
Timer Value 3 Register
OC4CON1
01AE
—
OC4CON2
01B0
FLTMD
OC4RS
01B2
Output Compare 4 Secondary Register
0000
OC4R
01B4
Output Compare 4 Register
0000
OC4TMR
01B6
Timer Value 4 Register
OC5CON1
01B8
—
OC5CON2
01BA
FLTMD
OC5RS
01BC
Output Compare 5 Secondary Register
0000
OC5R
01BE
Output Compare 5 Register
0000
OC5TMR
01C0
Timer Value 5 Register
xxxx
Legend:
—
OCSIDL
FLTOUT FLTTRIEN
—
OCSIDL
FLTOUT FLTTRIEN
OCTSEL2 OCTSEL1 OCTSEL0
OCINV
—
OCINV
—
ENFLT1
ENFLT0
OCFLT2
OCFLT1
DCB0
OC32
OCTRIG
TRIGSTAT
OCTRIS
DCB1
OCTSEL2 OCTSEL1 OCTSEL0
xxxx
ENFLT2
ENFLT1
ENFLT0
OCFLT2
OCFLT1
DCB0
OC32
OCTRIG
TRIGSTAT
OCTRIS
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TRIGMODE
OCM2
OCM1
OCM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000C
xxxx
ENFLT2
DCB1
OCFLT0
OCFLT0
TRIGMODE
OCM2
OCM1
OCM0
0000
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000C
PIC24FJ64GA104 FAMILY
DS39951C-page 40
TABLE 4-8:
 2010 Microchip Technology Inc.
 2010 Microchip Technology Inc.
I2C™ REGISTER MAP
TABLE 4-9:
File Name
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
I2C1RCV
0200
—
—
—
—
—
—
—
—
Receive Register
0000
I2C1TRN
0202
—
—
—
—
—
—
—
—
Transmit Register
00FF
I2C1BRG
0204
—
—
—
—
—
—
—
I2C1CON
0206
I2CEN
—
I2CSIDL
SCLREL
IPMIEN
A10M
DISSLW
SMEN
GCEN
STREN
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
I2C1STAT
0208
—
—
—
BCL
GCSTAT
ADD10
IWCOL
I2COV
D/A
P
S
R/W
RBF
TBF
I2C1ADD
020A
—
—
—
—
—
—
I2C1MSK
020C
—
—
—
—
—
—
I2C2RCV
0210
—
—
—
—
—
—
—
—
I2C2TRN
0212
—
—
—
—
—
—
—
—
I2C2BRG
0214
—
—
—
—
—
—
—
I2C2CON
0216
I2CEN
—
I2CSIDL
SCLREL
IPMIEN
A10M
DISSLW
SMEN
GCEN
STREN
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
I2C2STAT
0218
—
—
—
BCL
GCSTAT
ADD10
IWCOL
I2COV
D/A
P
S
R/W
RBF
TBF
I2C2ADD
021A
—
—
—
—
—
—
Address Register
0000
021C
—
—
—
—
—
—
Address Mask Register
0000
I2C2MSK
ACKSTAT TRSTAT
0000
Address Register
1000
0000
0000
Address Mask Register
0000
Receive Register
0000
Transmit Register
00FF
Baud Rate Generator Register
0000
1000
0000
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-10:
File Name
Addr
U1MODE
U1STA
UART REGISTER MAPS
Bit 15
Bit 14
0220
UARTEN
—
0222
UTXISEL1 UTXINV
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
USIDL
IREN
RTSMD
—
UEN1
UEN0
UTXISEL0
—
UTXBRK
UTXEN
UTXBF
TRMT
Bit 7
Bit 6
WAKE
LPBACK
URXISEL1 URXISEL0
Bit 4
Bit 3
Bit 2
Bit 1
ABAUD
RXINV
BRGH
PDSEL1
PDSEL0
STSEL
0000
ADDEN
RIDLE
PERR
FERR
OERR
URXDA
0110
U1TXREG
0224
—
—
—
—
—
—
—
Transmit Register
U1RXREG
0226
—
—
—
—
—
—
—
Receive Register
U1BRG
0228
U2MODE
0230
UARTEN
U2STA
0232
UTXISEL1 UTXINV
Bit 0
xxxx
0000
Baud Rate Generator Prescaler Register
—
USIDL
IREN
RTSMD
—
UEN1
UEN0
UTXISEL0
—
UTXBRK
UTXEN
UTXBF
TRMT
WAKE
LPBACK
URXISEL1 URXISEL0
0000
ABAUD
RXINV
BRGH
PDSEL1
PDSEL0
STSEL
0000
ADDEN
RIDLE
PERR
FERR
OERR
URXDA
0110
U2TXREG
0234
—
—
—
—
—
—
—
Transmit Register
U2RXREG
0236
—
—
—
—
—
—
—
Receive Register
U2BRG
0238
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Baud Rate Generator Prescaler Register
All
Resets
Bit 5
xxxx
0000
0000
DS39951C-page 41
PIC24FJ64GA104 FAMILY
Legend:
ACKSTAT TRSTAT
Baud Rate Generator Register
File Name
SPI REGISTER MAPS
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
SPIBEC2 SPIBEC1 SPIBEC0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
0000
SPI1STAT
0240
SPIEN
—
SPISIDL
—
—
SRMPT
SPIROV
SRXMPT
SISEL2
SISEL1
SISEL0
SPITBF
SPIRBF
SPI1CON1
0242
—
—
—
DISSCK
DISSDO
MODE16
SMP
CKE
SSEN
CKP
MSTEN
SPRE2
SPRE1
SPRE0
PPRE1
PPRE0
0000
SPI1CON2
0244
FRMEN
SPIFSD
SPIFPOL
—
—
—
—
—
—
—
—
—
—
—
SPIFE
SPIBEN
0000
SRMPT
SPIROV
SRXMPT
SISEL2
SISEL1
SISEL0
SPITBF
SPIRBF
SPI1BUF
0248
SPI2STAT
0260
SPIEN
—
SPISIDL
—
—
SPI2CON1
0262
—
—
—
DISSCK
DISSDO
MODE16
SMP
CKE
SSEN
CKP
MSTEN
SPRE2
SPRE1
SPRE0
PPRE1
PPRE0
0000
SPI2CON2
0264
FRMEN
SPIFSD
SPIFPOL
—
—
—
—
—
—
—
—
—
—
—
SPIFE
SPIBEN
0000
SPI2BUF
Legend:
0268
0000
Transmit and Receive Buffer
0000
0000
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-12:
File
Name
Transmit and Receive Buffer
SPIBEC2 SPIBEC1 SPIBEC0
PORTA REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10(1)
Bit 9(1)
Bit 8(1)
Bit 7(1)
Bit 6
Bit 5
Bit 4
Bit 3
Bit2
Bit 1
Bit 0
All
Resets
TRISA
02C0
—
—
—
—
—
TRISA10
TRISA9
TRISA8
TRISA7
—
—
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
079F
PORTA
02C2
—
—
—
—
—
RA10
RA9
RA8
RA7
—
—
RA4
RA3
RA2
RA1
RA0
xxxx
LATA
02C4
—
—
—
—
—
LATA10
LATA9
LATA8
LATA7
—
—
LATA4
LATA3
LATA2
LATA1
LATA0
xxxx
ODCA
02C6
—
—
—
—
—
ODA10
ODA9
ODA8
ODA7
—
—
ODA4
ODA3
ODA2
ODA1
ODA0
0000
Legend:
Note 1:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 44-pin devices.
Bits are unimplemented in 28-pin devices; read as ‘0’.
TABLE 4-13:
File
Name
Addr
PORTB REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
TRISB
02C8
TRISB10
TRISB9
TRISB8
TRISB7
TRISB6
TRISB5
TRISB4
TRISB3
TRISB2
TRISB1
TRISB0
EFBF
PORTB
02CA
RB15
RB14
RB13
RB12
RB11
RB10
RB9
RB8
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx
LATB
02CC
LATB15
LATB14
LATB13
LATB12
LATB11
LATB10
LATB9
LATB8
LATB7
LATB6
LATB5
LATB4
LATB3
LATB2
LATB1
LATB0
xxxx
ODCB
02CE
ODB15
ODB14
ODB13
ODB12
ODB11
ODB10
ODB9
ODB8
ODB7
ODB6
ODB5
ODB4
ODB3
ODB2
ODB1
ODB0
0000
 2010 Microchip Technology Inc.
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-14:
File
Name
TRISB15 TRISB14 TRISB13 TRISB12 TRISB11
Bit 10
PORTC REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9(1)
Bit 8(1)
Bit 7(1)
Bit 6(1)
Bit 5(1)
Bit 4(1)
Bit 3(1)
Bit 2(1)
Bit 1(2(1)
Bit 0(1)
All
Resets
TRISC
02D0
—
—
—
—
—
—
TRISC9
TRISC8
TRISC7
TRISC6
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
03FF
PORTC
02D2
—
—
—
—
—
—
RC9
RC8
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
xxxx
LATC
02D4
—
—
—
—
—
—
LATC9
LATC8
LATC7
LATC6
LATC5
LATC4
LATC3
LATC2
LATC1
LATC0
xxxx
ODCC
02D6
—
—
—
—
—
—
ODC9
ODC8
ODC7
ODC6
ODC5
ODC4
ODC3
ODC2
ODC1
ODC0
0000
Legend:
Note 1:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 44-pin devices.
Bits are unimplemented in 28-pin devices; read as ‘0’.
PIC24FJ64GA104 FAMILY
DS39951C-page 42
TABLE 4-11:
 2010 Microchip Technology Inc.
TABLE 4-15:
File Name
PAD CONFIGURATION REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
PADCFG1
02FC
—
—
—
—
—
—
—
—
—
—
—
—
—
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-16:
Bit 2
Bit 1
RTSECSEL1 RTSECSEL0
Bit 0
All
Resets
PMPTTL
0000
ADC REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
ADC1BUF0
0300
ADC Data Buffer 0
xxxx
ADC1BUF1
0302
ADC Data Buffer 1
xxxx
ADC1BUF2
0304
ADC Data Buffer 2
xxxx
ADC1BUF3
0306
ADC Data Buffer 3
xxxx
ADC1BUF4
0308
ADC Data Buffer 4
xxxx
ADC1BUF5
030A
ADC Data Buffer 5
xxxx
ADC1BUF6
030C
ADC Data Buffer 6
xxxx
ADC1BUF7
030E
ADC Data Buffer 7
xxxx
ADC1BUF8
0310
ADC Data Buffer 8
xxxx
ADC1BUF9
0312
ADC Data Buffer 9
xxxx
ADC1BUFA
0314
ADC Data Buffer 10
xxxx
ADC1BUFB
0316
ADC Data Buffer 11
xxxx
ADC1BUFC
0318
ADC Data Buffer 12
xxxx
ADC1BUFD
031A
ADC Data Buffer 13
xxxx
ADC1BUFE
031C
ADC Data Buffer 14
xxxx
ADC1BUFF
031E
ADC Data Buffer 15
AD1CON1
0320
ADON
—
ADSIDL
—
—
Bit 9
Bit 8
FORM1
FORM0
Bit 7
Bit 6
SSRC2
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
xxxx
SSRC1
SSRC0
—
—
ASAM
SAMP
DONE
0000
0000
AD1CON2
0322
VCFG2
VCFG1
VCFG0
r
—
CSCNA
—
—
BUFS
—
SMPI3
SMPI2
SMPI1
SMPI0
BUFM
ALTS
AD1CON3
0324
ADRC
r
r
SAMC4
SAMC3
SAMC2
SAMC1
SAMC0
ADCS7
ADCS6
ADCS5
ADCS4
ADCS3
ADCS2
ADCS1
ADCS0
0000
AD1CHS
0328
CH0NB
—
—
CH0SB4
CH0SB3
CH0SB2
CH0SB1
CH0SB0
CH0NA
—
—
CH0SA4
CH0SA3
CH0SA2
CH0SA1
CH0SA0
0000
AD1PCFG
032C
PCFG15
PCFG14 PCFG13 PCFG12(1) PCFG11
PCFG10
PCFG9
PCFG8(1) PCFG7(1) PCFG6(1)
PCFG5
PCFG4
PCFG3
PCFG2
PCFG1
PCFG0
0000
CSSL10
CSSL9
CSSL8(1) CSSL7(1) CSSL6(1)
CSSL5
CSSL4
CSSL3
CSSL2
CSSL1
CSSL0
0000
AD1CSSL
Legend:
Note 1:
0330
DS39951C-page 43
CTMUCON
Addr
CSSL13 CSSL12
CSSL11
CTMU REGISTER MAP
Bit 15
033C CTMUEN
CTMUICON 033E
Legend:
CSSL14
— = unimplemented, read as ‘0’, r = reserved, maintain as ‘0’. Reset values are shown in hexadecimal.
Bits are not available on 28-pin devices; read as ‘0’.
TABLE 4-17:
File Name
CSSL15
(1)
ITRIM5
Bit 14
—
ITRIM4
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG EDG2POL EDG2SEL1 EDG2SEL0 EDG1POL EDG1SEL1 EDG1SEL0 EDG2STAT EDG1STAT
ITRIM3
ITRIM2 ITRIM1
ITRIM0
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
IRNG1
IRNG0
—
—
—
—
—
—
—
—
All
Resets
0000
0000
PIC24FJ64GA104 FAMILY
Addr
—
Bit 10
All
Resets
File Name
File Name Addr
PARALLEL MASTER/SLAVE PORT REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
PMCON
0600
PMPEN
—
PSIDL
PMMODE
0602
BUSY
IRQM1
IRQM0
INCM1
INCM0
PMADDR
0604
—
CS1
—
—
—
Bit 10
ADRMUX1 ADRMUX0
Bit 9
PTBEEN
Bit 8
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
0000
CSF1
CSF0
ALP
—
CS1P
BEP
WRSP
RDSP
WAITB1
WAITB0
WAITM3
WAITM2
WAITM1
WAITM0
WAITE1
WAITE0
0000
ADDR10(1) ADDR9(1) ADDR8(1) ADDR7(1) ADDR6(1) ADDR5(1) ADDR4(1) ADDR3(1) ADDR2(1)
ADDR1
ADDR0
0000
MODE16
PTWREN PTRDEN
Bit 7
MODE1
MODE0
PMDOUT1
Parallel Port Data Out Register 1 (Buffers 0 and 1)
0000
PMDOUT2 0606
Parallel Port Data Out Register 2 (Buffers 2 and 3)
0000
0000
PMDIN1
0608
Parallel Port Data In Register 1 (Buffers 0 and 1)
PMDIN2
060A
Parallel Port Data In Register 2 (Buffers 2 and 3)
PMAEN
060C
—
PTEN14
—
—
—
PMSTAT
060E
IBF
IBOV
—
—
IB3F
Legend:
Note 1:
IB2F
IB1F
IB0F
OBE
OBUF
—
—
OB3E
OB2E
PTEN1
PTEN0
0000
OB1E
OB0E
0000
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bits are not available on 28-pin devices; read as ‘0’.
TABLE 4-19:
File Name
0000
PTEN10(1) PTEN9(1) PTEN8(1) PTEN7(1) PTEN6(1) PTEN5(1) PTEN4(1) PTEN3(1) PTEN2(1)
Addr
REAL-TIME CLOCK AND CALENDAR REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
AMASK3
AMASK2
AMASK1
Bit 10
ALRMVAL
0620
ALCFGRPT
0622
RTCVAL
0624
RCFGCAL
0626
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-20:
Bit 9
Bit 8
Bit 7
Bit 6
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ARPT5
ARPT4
ARPT3
ARPT2
ARPT1
ARPT0
0000
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
xxxx
Alarm Value Register Window Based on ALRMPTR<1:0>
ALRMEN CHIME
AMASK0 ALRMPTR1 ALRMPTR0
ARPT7
ARPT6
xxxx
RTCC Value Register Window Based on RTCPTR<1:0>
RTCEN
—
RTCWREN RTCSYNC HALFSEC
RTCOE
RTCPTR1
RTCPTR0
CAL7
All
Resets
Bit 5
CAL6
xxxx
CRC REGISTER MAP
 2010 Microchip Technology Inc.
Addr
Bit 15
Bit 14
Bit 13
CRCCON1
0640
CRCEN
—
CSIDL
CRCCON2
0642
—
—
—
CRCXORL
0644
X15
X14
X13
X12
X11
X10
X9
X8
X7
X6
X5
X4
X3
X2
CRCXORH
0646
X31
X30
X29
X28
X27
X26
X25
X24
X23
X22
X21
X20
X19
X19
CRCDATL
0648
CRC Data Input Register Low Word
xxxx
CRCDATH
064A
CRC Data Input Register High Word
xxxx
CRCWDATL
064C
CRC Result Register Low Word
xxxx
CRCWDATH
064E
CRC Result Register High Word
xxxx
Legend:
Bit 12
Bit 11
Bit 10
Bit 4
Bit 3
VWORD4 VWORD3 VWORD2 VWORD1 VWORD0 CRCFUL CRCMPT CRCISEL
CRCGO
LENDIAN
—
—
—
0000
DWIDTH4 DWIDTH3 DWIDTH2 DWIDTH1 DWIDTH0
PLEN4
PLEN3
PLEN2
PLEN1
PLEN0
0000
X1
—
0000
X17
X16
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 9
Bit 8
Bit 7
Bit 6
—
—
Bit 5
—
Bit 2
Bit 1
Bit 0
All
Resets
File Name
0000
PIC24FJ64GA104 FAMILY
DS39951C-page 44
TABLE 4-18:
 2010 Microchip Technology Inc.
TABLE 4-21:
File Name
COMPARATORS REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
CMSTAT
0650
CMIDL
—
—
—
—
CVRCON
0652
—
—
—
—
—
CM1CON
0654
CEN
COE
CPOL
—
—
—
CEVT
COUT
CM2CON
065C
CEN
COE
CPOL
—
—
—
CEVT
COUT
CM3CON
0664
CEN
COE
CPOL
—
—
—
CEVT
COUT
Legend:
Bit 9
Bit 8
Bit 7
C3EVT
C2EVT
C1EVT
—
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
—
—
—
—
C3OUT
C2OUT
C1OUT
0000
CVROE
CVRR
CVRSS
CVR3
CVR2
CVR1
CVR0
0000
EVPOL1 EVPOL0
—
CREF
—
—
CCH1
CCH0
0000
EVPOL1 EVPOL0
—
CREF
—
—
CCH1
CCH0
0000
EVPOL1 EVPOL0
—
CREF
—
—
CCH1
CCH0
0000
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
CVREFP CVREFM1 CVREFM0 CVREN
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-22:
File Name
Bit 10
PERIPHERAL PIN SELECT REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
0680
—
—
—
INT1R4
INT1R3
INT1R2
INT1R1
INT1R0
—
—
—
—
—
—
—
—
1F00
0682
—
—
—
—
—
—
—
—
—
—
—
INT2R4
INT2R3
INT2R2
INT2R1
INT2R0
001F
RPINR3
0686
—
—
—
T3CKR4
T3CKR3
T3CKR2
T3CKR1
T3CKR0
—
—
—
T2CKR4
T2CKR3
T2CKR2
T2CKR1
T2CKR0
1F1F
RPINR4
0688
—
—
—
T5CKR4
T5CKR3
T5CKR2
T5CKR1
T5CKR0
—
—
—
T4CKR4
T4CKR3
T4CKR2
T4CKR1
T4CKR0
1F1F
RPINR7
068E
—
—
—
IC2R4
IC2R3
IC2R2
IC2R1
IC2R0
—
—
—
IC1R4
IC1R3
IC1R2
IC1R1
IC1R0
1F1F
RPINR8
0690
—
—
—
IC4R4
IC4R3
IC4R2
IC4R1
IC4R0
—
—
—
IC3R4
IC3R3
IC3R2
IC3R1
IC3R0
1F1F
RPINR9
0692
—
—
—
—
—
—
—
—
—
—
—
IC5R4
IC5R3
IC5R2
IC5R1
IC5R0
001F
RPINR11
0696
—
—
—
OCFBR4
OCFBR3
OCFBR2
OCFBR1
OCFBR0
—
—
—
OCFAR4
OCFAR3
OCFAR2
OCFAR1
OCFAR0
1F1F
RPINR18
06A4
—
—
—
U1CTSR4 U1CTSR3 U1CTSR2 U1CTSR1 U1CTSR0
—
—
—
U1RXR4
U1RXR3
U1RXR2
U1RXR1
U1RXR0
1F1F
RPINR19
06A6
—
—
—
U2CTSR4 U2CTSR3 U2CTSR2 U2CTSR1 U2CTSR0
—
—
—
U2RXR4
U2RXR3
U2RXR2
U2RXR1
U2RXR0
1F1F
RPINR20
06A8
—
—
—
SCK1R4
SCK1R3
SCK1R2
SCK1R1
SCK1R0
—
—
—
SDI1R4
SDI1R3
SDI1R2
SDI1R1
SDI1R0
1F1F
RPINR21
06AA
—
—
—
—
—
—
—
—
—
—
—
SS1R4
SS1R3
SS1R2
SS1R1
SS1R0
001F
RPINR22
06AC
—
—
—
SCK2R4
SCK2R3
SCK2R2
SCK2R1
SCK2R0
—
—
—
SDI2R4
SDI2R3
SDI2R2
SDI2R1
SDI2R0
1F1F
RPINR23
06AE
—
—
—
—
—
—
—
—
—
—
—
SS2R4
SS2R3
SS2R2
SS2R1
SS2R0
001F
RPOR0
06C0
—
—
—
RP1R4
RP1R3
RP1R2
RP1R1
RP1R0
—
—
—
RP0R4
RP0R3
RP0R2
RP0R1
RP0R0
0000
RPOR1
06C2
—
—
—
RP3R4
RP3R3
RP3R2
RP3R1
RP3R0
—
—
—
RP2R4
RP2R3
RP2R2
RP2R1
RP2R0
0000
RPOR2
06C4
—
—
—
RP5R4
RP5R3
RP5R2
RP5R1
RP5R0
—
—
—
RP4R4
RP4R3
RP4R2
RP4R1
RP4R0
0000
RPOR3
06C6
—
—
—
RP7R4
RP7R3
RP7R2
RP7R1
RP7R0
—
—
—
RP6R4
RP6R3
RP6R2
RP6R1
RP6R0
0000
RPOR4
06C8
—
—
—
RP9R4
RP9R3
RP9R2
RP9R1
RP9R0
—
—
—
RP8R4
RP8R3
RP8R2
RP8R1
RP8R0
0000
RPOR5
06CA
—
—
—
RP11R4
RP11R3
RP11R2
RP11R1
RP11R0
—
—
—
RP10R4
RP10R3
RP10R2
RP10R1
RP10R0
0000
RPOR6
06CC
—
—
—
RP13R4
RP13R3
RP13R2
RP13R1
RP13R0
—
—
—
RP12R4
RP12R3
RP12R2
RP12R1
RP12R0
0000
RPOR7
06CE
—
—
—
RP15R4
RP15R3
RP15R2
RP15R1
RP15R0
—
—
—
RP14R4
RP14R3
RP14R2
RP14R1
RP14R0
0000
RPOR8(1)
06D0
—
—
—
RP17R4
RP17R3
RP17R2
RP17R1
RP17R0
—
—
—
RP16R4
RP16R3
RP16R2
RP16R1
RP16R0
0000
RPOR9(1)
06D2
—
—
—
RP19R4
RP19R3
RP19R2
RP19R1
RP19R0
—
—
—
RP18R4
RP18R3
RP18R2
RP18R1
RP18R0
0000
RPOR10(1)
06D4
—
—
—
RP21R4
RP21R3
RP21R2
RP21R1
RP21R0
—
—
—
RP20R4
RP20R3
RP20R2
RP20R1
RP20R0
0000
RPOR11(1)
06D6
—
—
—
RP23R4
RP23R3
RP23R2
RP23R1
RP23R0
—
—
—
RP22R4
RP22R3
RP22R2
RP22R1
RP22R0
0000
RPOR12(1)
06D8
—
—
—
RP25R4
RP25R3
RP25R2
RP25R1
RP25R0
—
—
—
RP24R4
RP24R3
RP24R2
RP24R1
RP24R0
0000
Legend:
Note 1:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Registers are unimplemented in 28-pin devices; read as ‘0’.
PIC24FJ64GA104 FAMILY
DS39951C-page 45
RPINR0
RPINR1
SYSTEM REGISTER MAP
File Name
Addr
Bit 15
Bit 14
RCON
0740
TRAPR
IOPUWR
OSCCON
0742
—
COSC2
CLKDIV
0744
ROI
DOZE2
OSCTUN
0748
—
—
REFOCON
074E
ROEN
—
Legend:
Note 1:
2:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
The Reset value of the RCON register is dependent on the type of Reset event. See Section 6.0 “Resets” for more information.
The Reset value of the OSCCON register is dependent on both the type of Reset event and the device configuration. See Section 8.0 “Oscillator Configuration” for more information.
TABLE 4-24:
File Name
DSCON
Bit 13
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
EXTR
SWR
SWDTEN
WDTO
SLEEP
CLKLOCK
IOLOCK
LOCK
—
CF
Bit 2
Bit 1
Bit 11
—
—
—
DPSLP
CM
PMSLP
COSC1
COSC0
—
NOSC2
NOSC1
NOSC0
IDLE
BOR
DOZE1
DOZE0
DOZEN
RCDIV2
RCDIV1
RCDIV0
—
—
—
—
—
—
—
—
0100
—
—
—
—
—
—
—
—
TUN5
TUN4
TUN3
TUN2
TUN1
TUN0
0000
ROSSLP
ROSEL
RODIV3
RODIV2
RODIV1
RODIV0
—
—
—
—
—
—
—
—
0000
POSCEN SOSCEN
Bit 0
All
Resets
Bit 12
POR
Note 1
OSWEN
Note 2
DEEP SLEEP REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
758
DSEN
—
—
—
—
—
—
—
—
—
—
—
—
—
DSWAKE
075A
—
—
—
—
—
—
—
DSINT0
DSFLT
—
—
DSWDT
DSRTC
DSMCLR
DSGPR0
075C
Deep Sleep General Purpose Register 0
0000
DSGPR1
075E
Deep Sleep General Purpose Register 1
0000
Legend:
Note 1:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
The Deep Sleep registers are only reset on a VDD POR event.
TABLE 4-25:
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
NVMCON
0760
WR
WREN
WRERR
—
—
—
—
—
—
ERASE
—
NVMKEY
0766
—
—
—
—
—
—
—
—
Legend:
Note 1:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Reset value shown is for POR only. Value on other Reset states is dependent on the state of memory write or erase operations at the time of Reset.
 2010 Microchip Technology Inc.
File Name
—
DSPOR
0000
0001
NVM REGISTER MAP
File Name
TABLE 4-26:
DSBOR RELEASE
All
Resets(1)
Bit 4
—
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
NVMOP3 NVMOP2 NVMOP1 NVMOP0 0000(1)
NVMKEY Register<7:0>
0000
PMD REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
PMD1
0770
T5MD
T4MD
T3MD
T2MD
T1MD
—
—
—
I2C1MD
U2MD
U1MD
SPI2MD
SPI1MD
—
—
ADC1MD
0000
PMD2
0772
—
—
—
IC5MD
IC4MD
IC3MD
IC2MD
IC1MD
—
—
—
OC5MD
OC4MD
OC3MD
OC2MD
OC1MD
0000
PMD3
0774
—
—
—
—
—
CRCMD
—
—
—
—
—
I2C2MD
—
0000
PMD4
0776
—
—
—
—
—
—
—
—
—
LVDMD
—
0000
Legend:
CMPMD RTCCMD PMPMD
—
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
—
—
REFOMD CTMUMD
PIC24FJ64GA104 FAMILY
DS39951C-page 46
TABLE 4-23:
PIC24FJ64GA104 FAMILY
4.2.5
4.3
SOFTWARE STACK
In addition to its use as a working register, the W15
register in PIC24F devices is also used as a Software
Stack Pointer. The pointer always points to the first
available free word and grows from lower to higher
addresses. It predecrements for stack pops and
post-increments for stack pushes, as shown in
Figure 4-4. Note that for a PC push during any CALL
instruction, the MSB of the PC is zero-extended before
the push, ensuring that the MSB is always clear.
Note:
A PC push during exception processing
will concatenate the SRL register to the
MSB of the PC prior to the push.
The Stack Pointer Limit Value (SPLIM) register, associated with the Stack Pointer, sets an upper address
boundary for the stack. SPLIM is uninitialized at Reset.
As is the case for the Stack Pointer, SPLIM<0> is
forced to ‘0’ because all stack operations must be
word-aligned. Whenever an EA is generated using
W15 as a source or destination pointer, the resulting
address is compared with the value in SPLIM. If the
contents of the Stack Pointer (W15) and the SPLIM
register are equal, and a push operation is performed,
a stack error trap will not occur. The stack error trap will
occur on a subsequent push operation. Thus, for
example, if it is desirable to cause a stack error trap
when the stack grows beyond address 2000h in RAM,
initialize the SPLIM with the value, 1FFEh.
Similarly, a Stack Pointer underflow (stack error) trap is
generated when the Stack Pointer address is found to
be less than 0800h. This prevents the stack from
interfering with the Special Function Register (SFR)
space.
A write to the SPLIM register should not be immediately
followed by an indirect read operation using W15.
FIGURE 4-4:
Stack Grows Towards
Higher Address
0000h
CALL STACK FRAME
15
0
PC<15:0>
000000000 PC<22:16>
<Free Word>
W15 (before CALL)
W15 (after CALL)
POP : [--W15]
PUSH : [W15++]
 2010 Microchip Technology Inc.
Interfacing Program and Data
Memory Spaces
The PIC24F architecture uses a 24-bit wide program
space and a 16-bit wide data space. The architecture is
also a modified Harvard scheme, meaning that data
can also be present in the program space. To use this
data successfully, it must be accessed in a way that
preserves the alignment of information in both spaces.
Aside from normal execution, the PIC24F architecture
provides two methods by which program space can be
accessed during operation:
• Using table instructions to access individual bytes
or words anywhere in the program space
• Remapping a portion of the program space into
the data space (program space visibility)
Table instructions allow an application to read or write
to small areas of the program memory. This makes the
method ideal for accessing data tables that need to be
updated from time to time. It also allows access to all
bytes of the program word. The remapping method
allows an application to access a large block of data on
a read-only basis, which is ideal for look-ups from a
large table of static data; it can only access the least
significant word of the program word.
4.3.1
ADDRESSING PROGRAM SPACE
Since the address ranges for the data and program
spaces are 16 and 24 bits, respectively, a method is
needed to create a 23-bit or 24-bit program address
from 16-bit data registers. The solution depends on the
interface method to be used.
For table operations, the 8-bit Table Memory Page
Address (TBLPAG) register is used to define a 32K word
region within the program space. This is concatenated
with a 16-bit EA to arrive at a full 24-bit program space
address. In this format, the Most Significant bit of
TBLPAG is used to determine if the operation occurs in
the user memory (TBLPAG<7> = 0) or the configuration
memory (TBLPAG<7> = 1).
For remapping operations, the 8-bit Program Space
Visibility Page Address (PSVPAG) register is used to
define a 16K word page in the program space. When
the Most Significant bit of the EA is ‘1’, PSVPAG is concatenated with the lower 15 bits of the EA to form a
23-bit program space address. Unlike table operations,
this limits remapping operations strictly to the user
memory area.
Table 4-27 and Figure 4-5 show how the program EA is
created for table operations and remapping accesses
from the data EA. Here, P<23:0> refers to a program
space word, whereas D<15:0> refers to a data space
word.
DS39951C-page 47
PIC24FJ64GA104 FAMILY
TABLE 4-27:
PROGRAM SPACE ADDRESS CONSTRUCTION
Program Space Address
Access
Space
<23>
Instruction Access
(Code Execution)
User
0
TBLRD/TBLWT
(Byte/Word Read/Write)
User
TBLPAG<7:0>
Data EA<15:0>
0xxx xxxx
xxxx xxxx xxxx xxxx
Configuration
TBLPAG<7:0>
Data EA<15:0>
1xxx xxxx
xxxx xxxx xxxx xxxx
Access Type
<15>
<14:1>
<0>
PC<22:1>
0
0xx xxxx xxxx xxxx xxxx xxx0
Program Space Visibility
(Block Remap/Read)
Note 1:
<22:16>
User
0
PSVPAG<7:0>
Data EA<14:0>(1)
0
xxxx xxxx
xxx xxxx xxxx xxxx
Data EA<15> is always ‘1’ in this case, but is not used in calculating the program space address. Bit 15 of
the address is PSVPAG<0>.
FIGURE 4-5:
DATA ACCESS FROM PROGRAM SPACE ADDRESS GENERATION
Program Counter(1)
Program Counter
0
0
23 Bits
EA
Table Operations(2)
1/0
1/0
TBLPAG
8 Bits
16 Bits
24 Bits
Select
Program Space
(Remapping)
Visibility(1)
0
EA
1
0
PSVPAG
8 Bits
15 Bits
23 Bits
User/Configuration
Space Select
Byte Select
Note 1: The LSb of program space addresses is always fixed as ‘0’ in order to maintain word alignment of
data in the program and data spaces.
2: Table operations are not required to be word-aligned. Table read operations are permitted in the
configuration memory space.
DS39951C-page 48
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
4.3.2
DATA ACCESS FROM PROGRAM
MEMORY USING TABLE
INSTRUCTIONS
The TBLRDL and TBLWTL instructions offer a direct
method of reading or writing the lower word of any
address within the program space without going through
data space. The TBLRDH and TBLWTH instructions are
the only method to read or write the upper 8 bits of a
program space word as data.
The PC is incremented by two for each successive
24-bit program word. This allows program memory
addresses to directly map to data space addresses.
Program memory can thus be regarded as two, 16-bit
word-wide address spaces, residing side by side, each
with the same address range. TBLRDL and TBLWTL
access the space which contains the least significant
data word, and TBLRDH and TBLWTH access the space
which contains the upper data byte.
Two table instructions are provided to move byte or
word-sized (16-bit) data to and from program space.
Both function as either byte or word operations.
1.
TBLRDL (Table Read Low): In Word mode, it
maps the lower word of the program space
location (P<15:0>) to a data address (D<15:0>).
In Byte mode, either the upper or lower byte of
the lower program word is mapped to the lower
byte of a data address. The upper byte is
selected when the byte select is ‘1’; the lower
byte is selected when it is ‘0’.
FIGURE 4-6:
2.
TBLRDH (Table Read High): In Word mode, it
maps the entire upper word of a program address
(P<23:16>) to a data address. Note that
D<15:8>, the ‘phantom’ byte, will always be ‘0’.
In Byte mode, it maps the upper or lower byte of
the program word to D<7:0> of the data
address, as above. Note that the data will
always be ‘0’ when the upper ‘phantom’ byte is
selected (byte select = 1).
In a similar fashion, two table instructions, TBLWTH
and TBLWTL, are used to write individual bytes or
words to a program space address. The details of
their operation are explained in Section 5.0 “Flash
Program Memory”.
For all table operations, the area of program memory
space to be accessed is determined by the Table
Memory Page Address register (TBLPAG). TBLPAG
covers the entire program memory space of the
device, including user and configuration spaces. When
TBLPAG<7> = 0, the table page is located in the user
memory space. When TBLPAG<7> = 1, the page is
located in configuration space.
Note:
Only table read operations will execute in
the configuration memory space, and only
then, in implemented areas, such as the
Device ID. Table write operations are not
allowed.
ACCESSING PROGRAM MEMORY WITH TABLE INSTRUCTIONS
Program Space
TBLPAG
02
Data EA<15:0>
23
15
0
000000h
23
16
8
0
00000000
020000h
030000h
00000000
00000000
00000000
‘Phantom’ Byte
TBLRDH.B (Wn<0> = 0)
TBLRDL.B (Wn<0> = 1)
TBLRDL.B (Wn<0> = 0)
TBLRDL.W
800000h
 2010 Microchip Technology Inc.
The address for the table operation is determined by the data EA
within the page defined by the TBLPAG register.
Only read operations are shown; write operations are also valid in
the user memory area.
DS39951C-page 49
PIC24FJ64GA104 FAMILY
4.3.3
READING DATA FROM PROGRAM
MEMORY USING PROGRAM SPACE
VISIBILITY
The upper 32 Kbytes of data space may optionally be
mapped into any 16K word page of the program space.
This provides transparent access of stored constant
data from the data space without the need to use
special instructions (i.e., TBLRDL/H).
Program space access through the data space occurs if
the Most Significant bit (MSb) of the data space EA is ‘1’
and program space visibility is enabled by setting the
PSV bit in the CPU Control register (CORCON<2>). The
location of the program memory space to be mapped
into the data space is determined by the Program Space
Visibility Page Address register (PSVPAG). This 8-bit
register defines any one of 256 possible pages of
16K words in program space. In effect, PSVPAG functions as the upper 8 bits of the program memory
address, with the 15 bits of the EA functioning as the
lower bits. Note that by incrementing the PC by 2 for
each program memory word, the lower 15 bits of data
space addresses directly map to the lower 15 bits in the
corresponding program space addresses.
Data reads to this area add an additional cycle to the
instruction being executed, since two program memory
fetches are required.
Although each data space address, 8000h and higher,
maps directly into a corresponding program memory
address (see Figure 4-7), only the lower 16 bits of the
FIGURE 4-7:
24-bit program word are used to contain the data. The
upper 8 bits of any program space locations used as
data should be programmed with ‘1111 1111’ or
‘0000 0000’ to force a NOP. This prevents possible
issues should the area of code ever be accidentally
executed.
Note:
PSV access is temporarily disabled during
table reads/writes.
For operations that use PSV and are executed outside
a REPEAT loop, the MOV and MOV.D instructions will
require one instruction cycle in addition to the specified
execution time. All other instructions will require two
instruction cycles in addition to the specified execution
time.
For operations that use PSV which are executed inside
a REPEAT loop, there will be some instances that
require two instruction cycles in addition to the
specified execution time of the instruction:
• Execution in the first iteration
• Execution in the last iteration
• Execution prior to exiting the loop due to an
interrupt
• Execution upon re-entering the loop after an
interrupt is serviced
Any other iteration of the REPEAT loop will allow the
instruction accessing data, using PSV, to execute in a
single cycle.
PROGRAM SPACE VISIBILITY OPERATION
When CORCON<2> = 1 and EA<15> = 1:
Program Space
PSVPAG
02
23
15
Data Space
0
000000h
0000h
Data EA<14:0>
010000h
018000h
The data in the page
designated by
PSVPAG is mapped
into the upper half of
the data memory
space....
8000h
PSV Area
FFFFh
800000h
DS39951C-page 50
...while the lower
15 bits of the EA
specify an exact
address within the
PSV area. This
corresponds exactly to
the same lower 15 bits
of the actual program
space address.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
5.0
Note:
FLASH PROGRAM MEMORY
RTSP is accomplished using TBLRD (table read) and
TBLWT (table write) instructions. With RTSP, the user
may write program memory data in blocks of 64 instructions (192 bytes) at a time and erase program memory
in blocks of 512 instructions (1536 bytes) at a time.
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section
4.
“Program
Memory”
(DS39715).
5.1
Regardless of the method used, all programming of
Flash memory is done with the table read and table
write instructions. These allow direct read and write
access to the program memory space from the data
memory while the device is in normal operating mode.
The 24-bit target address in the program memory is
formed using the TBLPAG<7:0> bits and the Effective
Address (EA) from a W register specified in the table
instruction, as shown in Figure 5-1.
The PIC24FJ64GA104 family of devices contains internal Flash program memory for storing and executing
application code. The memory is readable, writable and
erasable when operating with VDD over 2.35V. (If the
regulator is disabled, VDDCORE must be over 2.25V.)
It can be programmed in four ways:
• In-Circuit Serial Programming™ (ICSP™)
• Run-Time Self-Programming (RTSP)
• Enhanced In-Circuit Serial Programming
(Enhanced ICSP)
The TBLRDL and the TBLWTL instructions are used to
read or write to bits<15:0> of program memory.
TBLRDL and TBLWTL can access program memory in
both Word and Byte modes.
ICSP allows a PIC24FJ64GA104 family device to be
serially programmed while in the end application circuit.
This is simply done with two lines for the programming
clock and programming data (which are named PGECx
and PGEDx, respectively), and three other lines for
power (VDD), ground (VSS) and Master Clear (MCLR).
This allows customers to manufacture boards with
unprogrammed devices and then program the microcontroller just before shipping the product. This also
allows the most recent firmware or a custom firmware
to be programmed.
FIGURE 5-1:
Table Instructions and Flash
Programming
The TBLRDH and TBLWTH instructions are used to read
or write to bits<23:16> of program memory. TBLRDH
and TBLWTH can also access program memory in Word
or Byte mode.
ADDRESSING FOR TABLE REGISTERS
24 Bits
Using
Program
Counter
Program Counter
0
0
Working Reg EA
Using
Table
Instruction
User/Configuration
Space Select
 2010 Microchip Technology Inc.
1/0
TBLPAG Reg
8 Bits
16 Bits
24-Bit EA
Byte
Select
DS39951C-page 51
PIC24FJ64GA104 FAMILY
5.2
RTSP Operation
The PIC24F Flash program memory array is organized
into rows of 64 instructions or 192 bytes. RTSP allows
the user to erase blocks of eight rows (512 instructions)
at a time and to program one row at a time. It is also
possible to program single words.
The 8-row erase blocks and single row write blocks are
edge-aligned, from the beginning of program memory, on
boundaries of 1536 bytes and 192 bytes, respectively.
When data is written to program memory using TBLWT
instructions, the data is not written directly to memory.
Instead, data written using table writes is stored in
holding latches until the programming sequence is
executed.
Any number of TBLWT instructions can be executed
and a write will be successfully performed. However,
64 TBLWT instructions are required to write the full row
of memory.
To ensure that no data is corrupted during a write, any
unused addresses should be programmed with
FFFFFFh. This is because the holding latches reset to
an unknown state, so if the addresses are left in the
Reset state, they may overwrite the locations on rows
which were not rewritten.
The basic sequence for RTSP programming is to set up
a Table Pointer, then do a series of TBLWT instructions
to load the buffers. Programming is performed by
setting the control bits in the NVMCON register.
Data can be loaded in any order and the holding
registers can be written to multiple times before
performing a write operation. Subsequent writes,
however, will wipe out any previous writes.
Note:
Writing to a location multiple times without
erasing is not recommended.
All of the table write operations are single-word writes
(2 instruction cycles), because only the buffers are written. A programming cycle is required for programming
each row.
DS39951C-page 52
5.3
JTAG Operation
The PIC24F family supports JTAG boundary scan.
Boundary scan can improve the manufacturing
process by verifying pin to PCB connectivity.
5.4
Enhanced In-Circuit Serial
Programming
Enhanced In-Circuit Serial Programming uses an
on-board bootloader, known as the program executive,
to manage the programming process. Using an SPI
data frame format, the program executive can erase,
program and verify program memory. For more
information on Enhanced ICSP, see the device
programming specification.
5.5
Control Registers
There are two SFRs used to read and write the
program Flash memory: NVMCON and NVMKEY.
The NVMCON register (Register 5-1) controls which
blocks are to be erased, which memory type is to be
programmed and when the programming cycle starts.
NVMKEY is a write-only register that is used for write
protection. To start a programming or erase sequence,
the user must consecutively write 55h and AAh to the
NVMKEY register. Refer to Section 5.6 “Programming
Operations” for further details.
5.6
Programming Operations
A complete programming sequence is necessary for
programming or erasing the internal Flash in RTSP
mode. During a programming or erase operation, the
processor stalls (waits) until the operation is finished.
Setting the WR bit (NVMCON<15>) starts the
operation and the WR bit is automatically cleared when
the operation is finished.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 5-1:
NVMCON: FLASH MEMORY CONTROL REGISTER
R/SO-0, HC(1)
R/W-0(1)
R/W-0, HS(1)
U-0
U-0
U-0
U-0
U-0
WR
WREN
WRERR
—
—
—
—
—
bit 15
bit 8
U-0
R/W-0(1)
U-0
U-0
R/W-0(1)
R/W-0(1)
R/W-0(1)
R/W-0(1)
—
ERASE
—
—
NVMOP3(2)
NVMOP2(2)
NVMOP1(2)
NVMOP0(2)
bit 7
bit 0
Legend:
SO = Settable Only bit
HC = Hardware Clearable bit
HS = Hardware Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
WR: Write Control bit(1)
1 = Initiates a Flash memory program or erase operation. The operation is self-timed and the bit is
cleared by hardware once the operation is complete.
0 = Program or erase operation is complete and inactive
bit 14
WREN: Write Enable bit(1)
1 = Enable Flash program/erase operations
0 = Inhibit Flash program/erase operations
bit 13
WRERR: Write Sequence Error Flag bit(1)
1 = An improper program or erase sequence attempt, or termination has occurred (bit is set
automatically on any set attempt of the WR bit)
0 = The program or erase operation completed normally
bit 12-7
Unimplemented: Read as ‘0’
bit 6
ERASE: Erase/Program Enable bit(1)
1 = Perform the erase operation specified by NVMOP<3:0> on the next WR command
0 = Perform the program operation specified by NVMOP<3:0> on the next WR command
bit 5-4
Unimplemented: Read as ‘0’
bit 3-0
NVMOP<3:0>: NVM Operation Select bits(1,2)
1111 = Memory bulk erase operation (ERASE = 1) or no operation (ERASE = 0)(3)
0011 = Memory word program operation (ERASE = 0) or no operation (ERASE = 1)
0010 = Memory page erase operation (ERASE = 1) or no operation (ERASE = 0)
0001 = Memory row program operation (ERASE = 0) or no operation (ERASE = 1)
Note 1:
2:
3:
These bits can only be reset on POR.
All other combinations of NVMOP<3:0> are unimplemented.
Available in ICSP™ mode only. Refer to device programming specification.
 2010 Microchip Technology Inc.
DS39951C-page 53
PIC24FJ64GA104 FAMILY
5.6.1
PROGRAMMING ALGORITHM FOR
FLASH PROGRAM MEMORY
4.
5.
The user can program one row of Flash program memory
at a time. To do this, it is necessary to erase the 8-row
erase block containing the desired row. The general
process is as follows:
1.
2.
3.
Read eight rows of program memory
(512 instructions) and store in data RAM.
Update the program data in RAM with the
desired new data.
Erase the block (see Example 5-1):
a) Set the NVMOP bits (NVMCON<3:0>) to
‘0010’ to configure for block erase. Set the
ERASE (NVMCON<6>) and WREN
(NVMCON<14>) bits.
b) Write the starting address of the block to be
erased into the TBLPAG and W registers.
c) Write 55h to NVMKEY.
d) Write AAh to NVMKEY.
e) Set the WR bit (NVMCON<15>). The erase
cycle begins and the CPU stalls for the duration of the erase cycle. When the erase is
done, the WR bit is cleared automatically.
EXAMPLE 5-1:
DS39951C-page 54
For protection against accidental operations, the write
initiate sequence for NVMKEY must be used to allow
any erase or program operation to proceed. After the
programming command has been executed, the user
must wait for the programming time until programming
is complete. The two instructions following the start of
the programming sequence should be NOPs, as shown
in Example 5-5.
ERASING A PROGRAM MEMORY BLOCK (ASSEMBLY LANGUAGE CODE)
; Set up NVMCON for block erase operation
MOV
#0x4042, W0
MOV
W0, NVMCON
; Init pointer to row to be ERASED
MOV
#tblpage(PROG_ADDR), W0
MOV
W0, TBLPAG
MOV
#tbloffset(PROG_ADDR), W0
TBLWTL W0, [W0]
DISI
#5
MOV
MOV
MOV
MOV
BSET
NOP
NOP
6.
Write the first 64 instructions from data RAM into
the program memory buffers (see Example 5-1).
Write the program block to Flash memory:
a) Set the NVMOP bits to ‘0001’ to configure
for row programming. Clear the ERASE bit
and set the WREN bit.
b) Write 55h to NVMKEY.
c) Write AAh to NVMKEY.
d) Set the WR bit. The programming cycle
begins and the CPU stalls for the duration
of the write cycle. When the write to Flash
memory is done, the WR bit is cleared
automatically.
Repeat steps 4 and 5, using the next available
64 instructions from the block in data RAM by
incrementing the value in TBLPAG, until all
512 instructions are written back to Flash
memory.
#0x55, W0
W0, NVMKEY
#0xAA, W1
W1, NVMKEY
NVMCON, #WR
;
; Initialize NVMCON
;
;
;
;
;
;
;
;
;
;
;
;
Initialize PM Page Boundary SFR
Initialize in-page EA[15:0] pointer
Set base address of erase block
Block all interrupts with priority <7
for next 5 instructions
Write the 55 key
Write the AA key
Start the erase sequence
Insert two NOPs after the erase
command is asserted
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
EXAMPLE 5-2:
ERASING A PROGRAM MEMORY BLOCK (C LANGUAGE CODE)
// C example using MPLAB C30
unsigned long progAddr = 0xXXXXXX;
unsigned int offset;
// Address of row to write
//Set up pointer to the first memory location to be written
TBLPAG = progAddr>>16;
// Initialize PM Page Boundary SFR
offset = progAddr & 0xFFFF;
// Initialize lower word of address
__builtin_tblwtl(offset, 0x0000);
// Set base address of erase block
// with dummy latch write
NVMCON = 0x4042;
// Initialize NVMCON
asm("DISI #5");
//
//
//
//
__builtin_write_NVM();
EXAMPLE 5-3:
Block all interrupts with priority <7
for next 5 instructions
C30 function to perform unlock
sequence and set WR
LOADING THE WRITE BUFFERS (ASSEMBLY LANGUAGE CODE)
; Set up NVMCON for row programming operations
MOV
#0x4001, W0
;
MOV
W0, NVMCON
; Initialize NVMCON
; Set up a pointer to the first program memory location to be written
; program memory selected, and writes enabled
MOV
#0x0000, W0
;
MOV
W0, TBLPAG
; Initialize PM Page Boundary SFR
MOV
#0x6000, W0
; An example program memory address
; Perform the TBLWT instructions to write the latches
; 0th_program_word
MOV
#LOW_WORD_0, W2
;
MOV
#HIGH_BYTE_0, W3
;
TBLWTL W2, [W0]
; Write PM low word into program latch
TBLWTH W3, [W0++]
; Write PM high byte into program latch
; 1st_program_word
MOV
#LOW_WORD_1, W2
;
MOV
#HIGH_BYTE_1, W3
;
TBLWTL W2, [W0]
; Write PM low word into program latch
TBLWTH W3, [W0++]
; Write PM high byte into program latch
; 2nd_program_word
MOV
#LOW_WORD_2, W2
;
MOV
#HIGH_BYTE_2, W3
;
TBLWTL W2, [W0]
; Write PM low word into program latch
TBLWTH W3, [W0++]
; Write PM high byte into program latch
•
•
•
; 63rd_program_word
MOV
#LOW_WORD_31, W2
;
MOV
#HIGH_BYTE_31, W3
;
TBLWTL W2, [W0]
; Write PM low word into program latch
TBLWTH W3, [W0]
; Write PM high byte into program latch
 2010 Microchip Technology Inc.
DS39951C-page 55
PIC24FJ64GA104 FAMILY
EXAMPLE 5-4:
LOADING THE WRITE BUFFERS (C LANGUAGE CODE)
// C example using MPLAB C30
#define NUM_INSTRUCTION_PER_ROW 64
unsigned int offset;
unsigned int i;
unsigned long progAddr = 0xXXXXXX;
unsigned int progData[2*NUM_INSTRUCTION_PER_ROW];
//Set up NVMCON for row programming
NVMCON = 0x4001;
// Address of row to write
// Buffer of data to write
// Initialize NVMCON
//Set up pointer to the first memory location to be written
TBLPAG = progAddr>>16;
// Initialize PM Page Boundary SFR
offset = progAddr & 0xFFFF;
// Initialize lower word of address
//Perform TBLWT instructions to write necessary number of latches
for(i=0; i < 2*NUM_INSTRUCTION_PER_ROW; i++)
{
__builtin_tblwtl(offset, progData[i++]);
// Write to address low word
__builtin_tblwth(offset, progData[i]);
// Write to upper byte
offset = offset + 2;
// Increment address
}
EXAMPLE 5-5:
INITIATING A PROGRAMMING SEQUENCE (ASSEMBLY LANGUAGE CODE)
DISI
#5
MOV
MOV
MOV
MOV
BSET
NOP
NOP
BTSC
BRA
#0x55, W0
W0, NVMKEY
#0xAA, W1
W1, NVMKEY
NVMCON, #WR
EXAMPLE 5-6:
; Block all interrupts with priority <7
; for next 5 instructions
;
;
;
;
;
;
;
;
NVMCON, #15
$-2
Write the 55 key
Write the AA key
Start the erase sequence
and wait for it to be
completed
INITIATING A PROGRAMMING SEQUENCE (C LANGUAGE CODE)
// C example using MPLAB C30
asm("DISI #5");
// Block all interrupts with priority < 7
// for next 5 instructions
__builtin_write_NVM();
// Perform unlock sequence and set WR
DS39951C-page 56
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
5.6.2
PROGRAMMING A SINGLE WORD
OF FLASH PROGRAM MEMORY
instructions write the desired data into the write latches
and specify the lower 16 bits of the program memory
address to write to. To configure the NVMCON register
for a word write, set the NVMOP bits (NVMCON<3:0>)
to ‘0011’. The write is performed by executing the
unlock sequence and setting the WR bit (see
Example 5-7).
If a Flash location has been erased, it can be programmed using table write instructions to write an
instruction word (24-bit) into the write latch. The
TBLPAG register is loaded with the 8 Most Significant
Bytes of the Flash address. The TBLWTL and TBLWTH
EXAMPLE 5-7:
PROGRAMMING A SINGLE WORD OF FLASH PROGRAM MEMORY
(ASSEMBLY LANGUAGE CODE)
; Setup a pointer to data Program Memory
MOV
#tblpage(PROG_ADDR), W0
;
MOV
W0, TBLPAG
;Initialize PM Page Boundary SFR
MOV
#tbloffset(PROG_ADDR), W0
;Initialize a register with program memory address
MOV
MOV
TBLWTL
TBLWTH
#LOW_WORD, W2
#HIGH_BYTE, W3
W2, [W0]
W3, [W0++]
;
;
; Write PM low word into program latch
; Write PM high byte into program latch
; Setup NVMCON for programming one word to data Program Memory
MOV
#0x4003, W0
;
MOV
W0, NVMCON
; Set NVMOP bits to 0011
DISI
MOV
MOV
MOV
MOV
BSET
NOP
NOP
#5
#0x55, W0
W0, NVMKEY
#0xAA, W0
W0, NVMKEY
NVMCON, #WR
EXAMPLE 5-8:
; Disable interrupts while the KEY sequence is written
; Write the key sequence
; Start the write cycle
; Insert two NOPs after the erase
; Command is asserted
PROGRAMMING A SINGLE WORD OF FLASH PROGRAM MEMORY
(C LANGUAGE CODE)
// C example using MPLAB C30
unsigned
unsigned
unsigned
unsigned
int offset;
long progAddr = 0xXXXXXX;
int progDataL = 0xXXXX;
char progDataH = 0xXX;
//Set up NVMCON for word programming
NVMCON = 0x4003;
// Address of word to program
// Data to program lower word
// Data to program upper byte
// Initialize NVMCON
//Set up pointer to the first memory location to be written
TBLPAG = progAddr>>16;
// Initialize PM Page Boundary SFR
offset = progAddr & 0xFFFF;
// Initialize lower word of address
//Perform TBLWT instructions to write latches
__builtin_tblwtl(offset, progDataL);
__builtin_tblwth(offset, progDataH);
asm(“DISI #5”);
__builtin_write_NVM();
 2010 Microchip Technology Inc.
//
//
//
//
//
//
Write to address low word
Write to upper byte
Block interrupts with priority < 7
for next 5 instructions
C30 function to perform unlock
sequence and set WR
DS39951C-page 57
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 58
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
6.0
Note:
RESETS
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 7. “Reset” (DS39712).
The Reset module combines all Reset sources and
controls the device Master Reset Signal, SYSRST. The
following is a list of device Reset sources:
•
•
•
•
•
•
•
•
•
POR: Power-on Reset
MCLR: Pin Reset
SWR: RESET Instruction
WDT: Watchdog Timer Reset
BOR: Brown-out Reset
CM: Configuration Mismatch Reset
TRAPR: Trap Conflict Reset
IOPUWR: Illegal Opcode Reset
UWR: Uninitialized W Register Reset
Any active source of Reset will make the SYSRST
signal active. Many registers associated with the CPU
and peripherals are forced to a known Reset state.
Most registers are unaffected by a Reset; their status is
unknown on POR and unchanged by all other Resets.
Note:
All types of device Reset will set a corresponding status
bit in the RCON register to indicate the type of Reset
(see Register 6-1). A Power-on Reset will clear all bits,
except for the BOR and POR bits (RCON<1:0>), which
are set. The user may set or clear any bit at any time
during code execution. The RCON bits only serve as
status bits. Setting a particular Reset status bit in
software will not cause a device Reset to occur.
The RCON register also has other bits associated with
the Watchdog Timer and device power-saving states.
The function of these bits is discussed in other sections
of this data sheet.
A simplified block diagram of the Reset module is
shown in Figure 6-1.
FIGURE 6-1:
Refer to the specific peripheral or CPU
section of this manual for register Reset
states.
Note:
The status bits in the RCON register
should be cleared after they are read so
that the next RCON register value after a
device Reset will be meaningful.
RESET SYSTEM BLOCK DIAGRAM
RESET
Instruction
Glitch Filter
MCLR
WDT
Module
Sleep or Idle
VDD Rise
Detect
POR
Brown-out
Reset
BOR
SYSRST
VDD
Enable Voltage Regulator
Trap Conflict
Illegal Opcode
Configuration Mismatch
Uninitialized W Register
 2010 Microchip Technology Inc.
DS39951C-page 59
PIC24FJ64GA104 FAMILY
RCON: RESET CONTROL REGISTER(1)
REGISTER 6-1:
R/W-0
TRAPR
bit 15
R/W-0
IOPUWR
U-0
—
U-0
—
U-0
—
R/CO-0, HS
DPSLP
R/W-0
CM
R/W-0
PMSLP
bit 8
R/W-0
EXTR
bit 7
R/W-0
SWR
R/W-0
SWDTEN(2)
R/W-0
WDTO
R/W-0,
SLEEP
R/W-0
IDLE
R/W-1
BOR
R/W-1
POR
bit 0
Legend:
R = Readable bit
-n = Value at POR
bit 15
bit 14
bit 13-11
bit 10
bit 9
bit 8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
Note 1:
2:
CO = Clearable Only bit
W = Writable bit
‘1’ = Bit is set
HS = Hardware Settable bit
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
TRAPR: Trap Reset Flag bit
1 = A Trap Conflict Reset has occurred
0 = A Trap Conflict Reset has not occurred
IOPUWR: Illegal Opcode or Uninitialized W Access Reset Flag bit
1 = An illegal opcode detection, an illegal address mode or uninitialized W register used as an Address
Pointer caused a Reset
0 = An illegal opcode or uninitialized W Reset has not occurred
Unimplemented: Read as ‘0’
DPSLP: Deep Sleep Mode Flag bit
1 = Deep Sleep has occurred
0 = Deep Sleep has not occurred
CM: Configuration Word Mismatch Reset Flag bit
1 = A Configuration Word Mismatch Reset has occurred
0 = A Configuration Word Mismatch Reset has not occurred
PMSLP: Program Memory Power During Sleep bit
1 = Program memory bias voltage remains powered during Sleep
0 = Program memory bias voltage is powered down during Sleep and voltage regulator enters Standby mode
EXTR: External Reset (MCLR) Pin bit
1 = A Master Clear (pin) Reset has occurred
0 = A Master Clear (pin) Reset has not occurred
SWR: Software Reset (Instruction) Flag bit
1 = A RESET instruction has been executed
0 = A RESET instruction has not been executed
SWDTEN: Software Enable/Disable of WDT bit(2)
1 = WDT is enabled
0 = WDT is disabled
WDTO: Watchdog Timer Time-out Flag bit
1 = WDT time-out has occurred
0 = WDT time-out has not occurred
SLEEP: Wake From Sleep Flag bit
1 = Device has been in Sleep mode
0 = Device has not been in Sleep mode
IDLE: Wake-up From Idle Flag bit
1 = Device has been in Idle mode
0 = Device has not been in Idle mode
All of the Reset status bits may be set or cleared in software. Setting one of these bits in software does not
cause a device Reset.
If the FWDTEN Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled, regardless of the
SWDTEN bit setting.
DS39951C-page 60
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
RCON: RESET CONTROL REGISTER(1) (CONTINUED)
REGISTER 6-1:
bit 1
BOR: Brown-out Reset Flag bit
1 = A Brown-out Reset has occurred. Note that BOR is also set after a Power-on Reset.
0 = A Brown-out Reset has not occurred
POR: Power-on Reset Flag bit
1 = A Power-on Reset has occurred
0 = A Power-on Reset has not occurred
bit 0
Note 1:
All of the Reset status bits may be set or cleared in software. Setting one of these bits in software does not
cause a device Reset.
If the FWDTEN Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled, regardless of the
SWDTEN bit setting.
2:
TABLE 6-1:
RESET FLAG BIT OPERATION
Flag Bit
Setting Event
Clearing Event
TRAPR (RCON<15>)
Trap Conflict Event
POR
IOPUWR (RCON<14>)
Illegal Opcode or Uninitialized W Register Access
POR
CM (RCON<9>)
Configuration Mismatch Reset
POR
EXTR (RCON<7>)
MCLR Reset
POR
SWR (RCON<6>)
RESET Instruction
WDTO (RCON<4>)
WDT Time-out
SLEEP (RCON<3>)
PWRSAV #SLEEP Instruction
POR
IDLE (RCON<2>)
PWRSAV #IDLE Instruction
POR
POR
PWRSAV Instruction, POR
BOR (RCON<1>)
POR, BOR
—
POR (RCON<0>)
POR
—
DPSLP (RCON<10>)
PWRSAV #SLEEP instruction with DSCON <DSEN> set
Note:
6.1
POR
All Reset flag bits may be set or cleared by the user software.
Clock Source Selection at Reset
If clock switching is enabled, the system clock source at
device Reset is chosen as shown in Table 6-2. If clock
switching is disabled, the system clock source is always
selected according to the oscillator Configuration bits.
Refer to Section 8.0 “Oscillator Configuration” for
further details.
TABLE 6-2:
Reset Type
POR
BOR
MCLR
WDTO
OSCILLATOR SELECTION vs.
TYPE OF RESET (CLOCK
SWITCHING ENABLED)
Clock Source Determinant
FNOSC Configuration bits
(CW2<10:8>)
6.2
Device Reset Times
The Reset times for various types of device Reset are
summarized in Table 6-3. Note that the System Reset
signal, SYSRST, is released after the POR and PWRT
delay times expire.
The time at which the device actually begins to execute
code will also depend on the system oscillator delays,
which include the Oscillator Start-up Timer (OST) and
the PLL lock time. The OST and PLL lock times occur
in parallel with the applicable SYSRST delay times.
The FSCM delay determines the time at which the
FSCM begins to monitor the system clock source after
the SYSRST signal is released.
COSC Control bits
(OSCCON<14:12>)
SWR
 2010 Microchip Technology Inc.
DS39951C-page 61
PIC24FJ64GA104 FAMILY
TABLE 6-3:
RESET DELAY TIMES FOR VARIOUS DEVICE RESETS
Reset Type
POR(6)
EC
BOR
All Others
Note 1:
2:
3:
4:
5:
6:
Clock Source
SYSRST Delay
System Clock
Delay
TPOR + TRST + TPWRT
—
Notes
1, 2, 3, 8
FRC, FRCDIV
TPOR + TRST + TPWRT
TFRC
1, 2, 3, 4, 7, 8
LPRC
TPOR + TRST + TPWRT
TLPRC
1, 2, 3, 4, 8
1, 2, 3, 5, 8
ECPLL
TPOR + TRST + TPWRT
TLOCK
FRCPLL
TPOR + TRST + TPWRT
TFRC + TLOCK
XT, HS, SOSC
TPOR+ TRST + TPWRT
TOST
XTPLL, HSPLL
TPOR + TRST + TPWRT
TOST + TLOCK
1, 2, 3, 4, 5, 7, 8
1, 2, 3, 6, 8
1, 2, 3, 5, 6, 8
EC
TRST + TPWRT
—
FRC, FRCDIV
TRST + TPWRT
TFRC
2, 3, 4, 7, 8
LPRC
TRST + TPWRT
TLPRC
2, 3, 4, 8
ECPLL
TRST + TPWRT
TLOCK
2, 3, 5, 8
FRCPLL
TRST + TPWRT
TFRC + TLOCK
XT, HS, SOSC
TRST + TPWRT
TOST
XTPLL, HSPLL
TRST + TPWRT
TFRC + TLOCK
TRST
—
Any Clock
2, 3, 8
2, 3, 4, 5, 7, 8
2, 3, 6, 8
2, 3, 4, 5, 8
2, 8
8:
TPOR = Power-on Reset delay.
TRST = Internal State Reset time.
TPWRT = 64 ms nominal if regulator is disabled (DISVREG tied to VDD).
TFRC and TLPRC = RC Oscillator start-up times.
TLOCK = PLL lock time.
TOST = Oscillator Start-up Timer (OST). A 10-bit counter waits 1024 oscillator periods before releasing the
oscillator clock to the system.
If Two-Speed Start-up is enabled, regardless of the Primary Oscillator selected, the device starts with
FRC, and in such cases, FRC start-up time is valid.
TRST = Configuration setup time.
Note:
For detailed operating frequency and timing specifications, see Section 28.0 “Electrical Characteristics”.
7:
DS39951C-page 62
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
6.2.1
POR AND LONG OSCILLATOR
START-UP TIMES
The oscillator start-up circuitry and its associated delay
timers are not linked to the device Reset delays that
occur at power-up. Some crystal circuits (especially
low-frequency crystals) will have a relatively long
start-up time. Therefore, one or more of the following
conditions is possible after SYSRST is released:
• The oscillator circuit has not begun to oscillate.
• The Oscillator Start-up Timer has not expired (if a
crystal oscillator is used).
• The PLL has not achieved a lock (if PLL is used).
The device will not begin to execute code until a valid
clock source has been released to the system. Therefore, the oscillator and PLL start-up delays must be
considered when the Reset delay time must be known.
6.2.2
FAIL-SAFE CLOCK MONITOR
(FSCM) AND DEVICE RESETS
If the FSCM is enabled, it will begin to monitor the
system clock source when SYSRST is released. If a
valid clock source is not available at this time, the
device will automatically switch to the FRC Oscillator
and the user can switch to the desired crystal oscillator
in the Trap Service Routine (TSR).
 2010 Microchip Technology Inc.
6.3
Special Function Register Reset
States
Most of the Special Function Registers (SFRs) associated with the PIC24F CPU and peripherals are reset to a
particular value at a device Reset. The SFRs are
grouped by their peripheral or CPU function and their
Reset values are specified in each section of this manual.
The Reset value for each SFR does not depend on the
type of Reset with the exception of four registers. The
Reset value for the Reset Control register, RCON, will
depend on the type of device Reset. The Reset value
for the Oscillator Control register, OSCCON, will
depend on the type of Reset and the programmed
values of the FNOSC bits in Flash Configuration
Word 2 (CW2); see Table 6-2. The RCFGCAL and
NVMCON registers are only affected by a POR.
6.4
Deep Sleep BOR (DSBOR)
Deep Sleep BOR is a very low-power BOR circuitry,
used when the device is in Deep Sleep mode. Due to
low-current consumption, accuracy may vary.
The DSBOR trip point is around 2.0V. DSBOR is
enabled by configuring CW4 (DSBOREN) = 1. DSBOR
will re-arm the POR to ensure the device will reset if VDD
drops below the POR threshold.
DS39951C-page 63
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 64
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
7.0
Note:
INTERRUPT CONTROLLER
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 8. “Interrupts” (DS39707).
The PIC24F interrupt controller reduces the numerous
peripheral interrupt request signals to a single interrupt
request signal to the PIC24F CPU. It has the following
features:
•
•
•
•
Up to 8 processor exceptions and software traps
7 user-selectable priority levels
Interrupt Vector Table (IVT) with up to 118 vectors
A unique vector for each interrupt or exception
source
• Fixed priority within a specified user priority level
• Alternate Interrupt Vector Table (AIVT) for debug
support
• Fixed interrupt entry and return latencies
7.1
Interrupt Vector Table
The Interrupt Vector Table (IVT) is shown in Figure 7-1.
The IVT resides in program memory, starting at location
000004h. The IVT contains 126 vectors, consisting of
8 non-maskable trap vectors, plus up to 118 sources of
interrupt. In general, each interrupt source has its own
vector. Each interrupt vector contains a 24-bit wide
address. The value programmed into each interrupt
vector location is the starting address of the associated
Interrupt Service Routine (ISR).
7.1.1
ALTERNATE INTERRUPT VECTOR
TABLE
The Alternate Interrupt Vector Table (AIVT) is located
after the IVT, as shown in Figure 7-1. Access to the
AIVT is provided by the ALTIVT control bit
(INTCON2<15>). If the ALTIVT bit is set, all interrupt
and exception processes will use the alternate vectors
instead of the default vectors. The alternate vectors are
organized in the same manner as the default vectors.
The AIVT supports emulation and debugging efforts by
providing a means to switch between an application
and a support environment without requiring the interrupt vectors to be reprogrammed. This feature also
enables switching between applications for evaluation
of different software algorithms at run time. If the AIVT
is not needed, the AIVT should be programmed with
the same addresses used in the IVT.
7.2
Reset Sequence
A device Reset is not a true exception because the
interrupt controller is not involved in the Reset process.
The PIC24F devices clear their registers in response to
a Reset which forces the PC to zero. The microcontroller then begins program execution at location
000000h. The user programs a GOTO instruction at the
Reset address, which redirects program execution to
the appropriate start-up routine.
Note:
Any unimplemented or unused vector
locations in the IVT and AIVT should be
programmed with the address of a default
interrupt handler routine that contains a
RESET instruction.
Interrupt vectors are prioritized in terms of their natural
priority; this is linked to their position in the vector table.
All other things being equal, lower addresses have a
higher natural priority. For example, the interrupt
associated with vector 0 will take priority over interrupts
at any other vector address.
PIC24FJ64GA104
family
devices
implement
non-maskable traps and unique interrupts. These are
summarized in Table 7-1 and Table 7-2.
 2010 Microchip Technology Inc.
DS39951C-page 65
PIC24FJ64GA104 FAMILY
FIGURE 7-1:
PIC24F INTERRUPT VECTOR TABLE
Decreasing Natural Order Priority
Reset – GOTO Instruction
Reset – GOTO Address
Reserved
Oscillator Fail Trap Vector
Address Error Trap Vector
Stack Error Trap Vector
Math Error Trap Vector
Reserved
Reserved
Reserved
Interrupt Vector 0
Interrupt Vector 1
—
—
—
Interrupt Vector 52
Interrupt Vector 53
Interrupt Vector 54
—
—
—
Interrupt Vector 116
Interrupt Vector 117
Reserved
Reserved
Reserved
Oscillator Fail Trap Vector
Address Error Trap Vector
Stack Error Trap Vector
Math Error Trap Vector
Reserved
Reserved
Reserved
Interrupt Vector 0
Interrupt Vector 1
—
—
—
Interrupt Vector 52
Interrupt Vector 53
Interrupt Vector 54
—
—
—
Interrupt Vector 116
Interrupt Vector 117
Start of Code
Note 1:
TABLE 7-1:
000000h
000002h
000004h
000014h
00007Ch
00007Eh
000080h
0000FCh
0000FEh
000100h
000102h
000114h
Alternate Interrupt Vector Table (AIVT)(1)
00017Ch
00017Eh
000180h
0001FEh
000200h
See Table 7-2 for the interrupt vector list.
TRAP VECTOR DETAILS
Vector Number
IVT Address
AIVT Address
0
1
2
3
4
5
6
7
000004h
000006h
000008h
00000Ah
00000Ch
00000Eh
000010h
000012h
000104h
000106h
000108h
00010Ah
00010Ch
00010Eh
000110h
000112h
DS39951C-page 66
Interrupt Vector Table (IVT)(1)
Trap Source
Reserved
Oscillator Failure
Address Error
Stack Error
Math Error
Reserved
Reserved
Reserved
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 7-2:
IMPLEMENTED INTERRUPT VECTORS
Interrupt Bit Locations
Vector
Number
IVT Address
AIVT
Address
Flag
Enable
ADC1 Conversion Done
13
00002Eh
00012Eh
IFS0<13>
IEC0<13>
IPC3<6:4>
Comparator Event
18
000038h
000138h
IFS1<2>
IEC1<2>
IPC4<10:8>
CRC Generator
67
00009Ah
00019Ah
IFS4<3>
IEC4<3>
IPC16<14:12>
CTMU Event
77
0000AEh
0001AEh
IFS4<13>
IEC4<13>
IPC19<6:4>
Interrupt Source
Priority
External Interrupt 0
0
000014h
000114h
IFS0<0>
IEC0<0>
IPC0<2:0>
External Interrupt 1
20
00003Ch
00013Ch
IFS1<4>
IEC1<4>
IPC5<2:0>
External Interrupt 2
29
00004Eh
00014Eh
IFS1<13>
IEC1<13>
IPC7<6:4>
I2C1 Master Event
17
000036h
000136h
IFS1<1>
IEC1<1>
IPC4<6:4>
I2C1 Slave Event
16
000034h
000134h
IFS1<0>
IEC1<0>
IPC4<2:0>
I2C2 Master Event
50
000078h
000178h
IFS3<2>
IEC3<2>
IPC12<10:8>
I2C2 Slave Event
49
000076h
000176h
IFS3<1>
IEC3<1>
IPC12<6:4>
Input Capture 1
1
000016h
000116h
IFS0<1>
IEC0<1>
IPC0<6:4>
Input Capture 2
5
00001Eh
00011Eh
IFS0<5>
IEC0<5>
IPC1<6:4>
Input Capture 3
37
00005Eh
00015Eh
IFS2<5>
IEC2<5>
IPC9<6:4>
Input Capture 4
38
000060h
000160h
IFS2<6>
IEC2<6>
IPC9<10:8>
Input Capture 5
39
000062h
000162h
IFS2<7>
IEC2<7>
IPC9<14:12>
Input Change Notification
19
00003Ah
00013Ah
IFS1<3>
IEC1<3>
IPC4<14:12>
LVD Low-Voltage Detect
72
0000A4h
0001A4h
IFS4<8>
IEC4<8>
IPC18<2:0>
Output Compare 1
2
000018h
000118h
IFS0<2>
IEC0<2>
IPC0<10:8>
Output Compare 2
6
000020h
000120h
IFS0<6>
IEC0<6>
IPC1<10:8>
Output Compare 3
25
000046h
000146h
IFS1<9>
IEC1<9>
IPC6<6:4>
Output Compare 4
26
000048h
000148h
IFS1<10>
IEC1<10>
IPC6<10:8>
Output Compare 5
41
000066h
000166h
IFS2<9>
IEC2<9>
IPC10<6:4>
Parallel Master Port
45
00006Eh
00016Eh
IFS2<13>
IEC2<13>
IPC11<6:4>
Real-Time Clock/Calendar
62
000090h
000190h
IFS3<14>
IEC3<14>
IPC15<10:8>
SPI1 Error
9
000026h
000126h
IFS0<9>
IEC0<9>
IPC2<6:4>
SPI1 Event
10
000028h
000128h
IFS0<10>
IEC0<10>
IPC2<10:8>
SPI2 Error
32
000054h
000154h
IFS2<0>
IEC2<0>
IPC8<2:0>
SPI2 Event
33
000056h
000156h
IFS2<1>
IEC2<1>
IPC8<6:4>
Timer1
3
00001Ah
00011Ah
IFS0<3>
IEC0<3>
IPC0<14:12>
Timer2
7
000022h
000122h
IFS0<7>
IEC0<7>
IPC1<14:12>
Timer3
8
000024h
000124h
IFS0<8>
IEC0<8>
IPC2<2:0>
Timer4
27
00004Ah
00014Ah
IFS1<11>
IEC1<11>
IPC6<14:12>
Timer5
28
00004Ch
00014Ch
IFS1<12>
IEC1<12>
IPC7<2:0>
UART1 Error
65
000096h
000196h
IFS4<1>
IEC4<1>
IPC16<6:4>
IPC2<14:12>
UART1 Receiver
11
00002Ah
00012Ah
IFS0<11>
IEC0<11>
UART1 Transmitter
12
00002Ch
00012Ch
IFS0<12>
IEC0<12>
IPC3<2:0>
UART2 Error
66
000098h
000198h
IFS4<2>
IEC4<2>
IPC16<10:8>
UART2 Receiver
30
000050h
000150h
IFS1<14>
IEC1<14>
IPC7<10:8>
UART2 Transmitter
31
000052h
000152h
IFS1<15>
IEC1<15>
IPC7<14:12>
 2010 Microchip Technology Inc.
DS39951C-page 67
PIC24FJ64GA104 FAMILY
7.3
Interrupt Control and Status
Registers
The PIC24FJ64GA104 family of devices implements
the following registers for the interrupt controller:
•
•
•
•
•
INTCON1
INTCON2
IFS0 through IFS4
IEC0 through IEC4
IPC0 through IPC20 (except IPC13, IPC14 and
IPC17)
• INTTREG
Global interrupt control functions are controlled from
INTCON1 and INTCON2. INTCON1 contains the Interrupt Nesting Disable (NSTDIS) bit, as well as the
control and status flags for the processor trap sources.
The INTCON2 register controls the external interrupt
request signal behavior and the use of the Alternate
Interrupt Vector Table.
The IFSx registers maintain all of the interrupt request
flags. Each source of interrupt has a status bit which is
set by the respective peripherals, or an external signal,
and is cleared via software.
The IECx registers maintain all of the interrupt enable
bits. These control bits are used to individually enable
interrupts from the peripherals or external signals.
The IPCx registers are used to set the interrupt priority
level for each source of interrupt. Each user interrupt
source can be assigned to one of eight priority levels.
DS39951C-page 68
The interrupt sources are assigned to the IFSx, IECx
and IPCx registers in the order of their vector numbers,
as shown in Table 7-2. For example, the INT0 (External
Interrupt 0) is shown as having a vector number and a
natural order priority of 0. Thus, the INT0IF status bit is
found in IFS0<0>, the INT0IE enable bit in IEC0<0>
and the INT0IP<2:0> priority bits in the first position of
IPC0 (IPC0<2:0>).
Although they are not specifically part of the interrupt
control hardware, two of the CPU control registers contain bits that control interrupt functionality. The ALU
STATUS Register (SR) contains the IPL<2:0> bits
(SR<7:5>); these indicate the current CPU interrupt
priority level. The user may change the current CPU
priority level by writing to the IPL bits.
The CORCON register contains the IPL3 bit, which,
together with IPL<2:0>, indicates the current CPU
priority level. IPL3 is a read-only bit so that trap events
cannot be masked by the user software.
The interrupt controller has the Interrupt Controller Test
Register (INTTREG) that displays the status of the
interrupt controller. When an interrupt request occurs,
its associated vector number and the new interrupt
priority level are latched into INTTREG.
This information can be used to determine a specific
interrupt source if a generic ISR is used for multiple
vectors – such as when ISR remapping is used in bootloader applications. It also could be used to check if
another interrupt is pending while in an ISR.
All interrupt registers are described in Register 7-1
through Register 7-32, on the following pages.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-1:
SR: ALU STATUS REGISTER (IN CPU)
U-0
U-0
U-0
U-0
U-0
U-0
U-0
R-0
—
—
—
—
—
—
—
DC(1)
bit 15
bit 8
R/W-0
IPL2
(2,3)
R/W-0
R/W-0
R-0
R/W-0
R/W-0
R/W-0
R/W-0
IPL1(2,3)
IPL0(2,3)
RA(1)
N(1)
OV(1)
Z(1)
C(1)
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
IPL<2:0>: CPU Interrupt Priority Level Status bits(2,3)
111 = CPU interrupt priority level is 7 (15). User interrupts are disabled.
110 = CPU interrupt priority level is 6 (14)
101 = CPU interrupt priority level is 5 (13)
100 = CPU interrupt priority level is 4 (12)
011 = CPU interrupt priority level is 3 (11)
010 = CPU interrupt priority level is 2 (10)
001 = CPU interrupt priority level is 1 (9)
000 = CPU interrupt priority level is 0 (8)
bit 7-5
Note 1:
2:
3:
See Register 3-1 for the description of the remaining bit(s) that are not dedicated to interrupt control
functions.
The IPL bits are concatenated with the IPL3 bit (CORCON<3>) to form the CPU interrupt priority level.
The value in parentheses indicates the interrupt priority level if IPL3 = 1.
The IPL Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
REGISTER 7-2:
CORCON: CPU CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
R/C-0
R/W-0
U-0
U-0
—
—
—
—
IPL3(2)
PSV(1)
—
—
bit 7
bit 0
Legend:
C = Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
IPL3: CPU Interrupt Priority Level Status bit(2)
1 = CPU interrupt priority level is greater than 7
0 = CPU interrupt priority level is 7 or less
bit 3
Note 1:
2:
See Register 3-2 for the description of the remaining bit(s) that are not dedicated to interrupt control
functions.
The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt priority level.
 2010 Microchip Technology Inc.
DS39951C-page 69
PIC24FJ64GA104 FAMILY
REGISTER 7-3:
INTCON1: INTERRUPT CONTROL REGISTER 1
R/W-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
NSTDIS
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
—
—
—
MATHERR
ADDRERR
STKERR
OSCFAIL
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
NSTDIS: Interrupt Nesting Disable bit
1 = Interrupt nesting is disabled
0 = Interrupt nesting is enabled
bit 14-5
Unimplemented: Read as ‘0’
bit 4
MATHERR: Arithmetic Error Trap Status bit
1 = Overflow trap has occurred
0 = Overflow trap has not occurred
bit 3
ADDRERR: Address Error Trap Status bit
1 = Address error trap has occurred
0 = Address error trap has not occurred
bit 2
STKERR: Stack Error Trap Status bit
1 = Stack error trap has occurred
0 = Stack error trap has not occurred
bit 1
OSCFAIL: Oscillator Failure Trap Status bit
1 = Oscillator failure trap has occurred
0 = Oscillator failure trap has not occurred
bit 0
Unimplemented: Read as ‘0’
DS39951C-page 70
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-4:
INTCON2: INTERRUPT CONTROL REGISTER 2
R/W-0
R-0
U-0
U-0
U-0
U-0
U-0
U-0
ALTIVT
DISI
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
—
—
—
—
—
INT2EP
INT1EP
INT0EP
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
ALTIVT: Enable Alternate Interrupt Vector Table bit
1 = Use Alternate Interrupt Vector Table
0 = Use standard (default) vector table
bit 14
DISI: DISI Instruction Status bit
1 = DISI instruction is active
0 = DISI instruction is not active
bit 13-3
Unimplemented: Read as ‘0’
bit 2
INT2EP: External Interrupt 2 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
bit 1
INT1EP: External Interrupt 1 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
bit 0
INT0EP: External Interrupt 0 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 71
PIC24FJ64GA104 FAMILY
REGISTER 7-5:
IFS0: INTERRUPT FLAG STATUS REGISTER 0
U-0
—
bit 15
U-0
—
R/W-0
AD1IF
R/W-0
U1TXIF
R/W-0
U1RXIF
R/W-0
SPI1IF
R/W-0
SPF1IF
R/W-0
T3IF
bit 8
R/W-0
T2IF
bit 7
R/W-0
OC2IF
R/W-0
IC2IF
U-0
—
R/W-0
T1IF
R/W-0
OC1IF
R/W-0
IC1IF
R/W-0
INT0IF
bit 0
Legend:
R = Readable bit
-n = Value at POR
bit 15-14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Unimplemented: Read as ‘0’
AD1IF: A/D Conversion Complete Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
U1TXIF: UART1 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
U1RXIF: UART1 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
SPI1IF: SPI1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
SPF1IF: SPI1 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
T3IF: Timer3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
T2IF: Timer2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
OC2IF: Output Compare Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
IC2IF: Input Capture Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
Unimplemented: Read as ‘0’
T1IF: Timer1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
OC1IF: Output Compare Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
IC1IF: Input Capture Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
INT0IF: External Interrupt 0 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
DS39951C-page 72
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-6:
IFS1: INTERRUPT FLAG STATUS REGISTER 1
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
U2TXIF
U2RXIF
INT2IF
T5IF
T4IF
OC4IF
OC3IF
—
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
INT1IF
CNIF
CMIF
MI2C1IF
SI2C1IF
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
U2TXIF: UART2 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 14
U2RXIF: UART2 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13
INT2IF: External Interrupt 2 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12
T5IF: Timer5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 11
T4IF: Timer4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 10
OC4IF: Output Compare Channel 4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 9
OC3IF: Output Compare Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8-5
Unimplemented: Read as ‘0’
bit 4
INT1IF: External Interrupt 1 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 3
CNIF: Input Change Notification Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 2
CMIF: Comparator Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1
MI2C1IF: Master I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0
SI2C1IF: Slave I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 73
PIC24FJ64GA104 FAMILY
REGISTER 7-7:
IFS2: INTERRUPT FLAG STATUS REGISTER 2
U-0
U-0
R/W-0
U-0
U-0
U-0
R/W-0
U-0
—
—
PMPIF
—
—
—
OC5IF
—
bit 15
bit 8
R/W-0
R/W-0
R/W-0
U-0
U-0
U-0
R/W-0
R/W-0
IC5IF
IC4IF
IC3IF
—
—
—
SPI2IF
SPF2IF
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-14
Unimplemented: Read as ‘0’
bit 13
PMPIF: Parallel Master Port Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12-10
Unimplemented: Read as ‘0’
bit 9
OC5IF: Output Compare Channel 5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8
Unimplemented: Read as ‘0’
bit 7
IC5IF: Input Capture Channel 5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 6
IC4IF: Input Capture Channel 4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5
IC3IF: Input Capture Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4-2
Unimplemented: Read as ‘0’
bit 1
SPI2IF: SPI2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0
SPF2IF: SPI2 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
DS39951C-page 74
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-8:
IFS3: INTERRUPT FLAG STATUS REGISTER 3
U-0
R/W-0
U-0
U-0
U-0
U-0
U-0
U-0
—
RTCIF
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
R/W-0,
R/W-0
U-0
—
—
—
—
—
MI2C2IF
SI2C2IF
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14
RTCIF: Real-Time Clock/Calendar Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13-3
Unimplemented: Read as ‘0’
bit 2
MI2C2IF: Master I2C2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1
SI2C2IF: Slave I2C2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 75
PIC24FJ64GA104 FAMILY
REGISTER 7-9:
IFS4: INTERRUPT FLAG STATUS REGISTER 4
U-0
U-0
R/W-0
U-0
U-0
U-0
U-0
R/W-0
—
—
CTMUIF
—
—
—
—
LVDIF
bit 15
bit 8
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
U-0
—
—
—
—
CRCIF
U2ERIF
U1ERIF
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-14
Unimplemented: Read as ‘0’
bit 13
CTMUIF: CTMU Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12-9
Unimplemented: Read as ‘0’
bit 8
LVDIF: Low-Voltage Detect Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7-4
Unimplemented: Read as ‘0’
bit 3
CRCIF: CRC Generator Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 2
U2ERIF: UART2 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1
U1ERIF: UART1 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0
Unimplemented: Read as ‘0’
DS39951C-page 76
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-10:
IEC0: INTERRUPT ENABLE CONTROL REGISTER 0
U-0
—
bit 15
U-0
—
R/W-0
AD1IE
R/W-0
U1TXIE
R/W-0
U1RXIE
R/W-0
SPI1IE
R/W-0
SPF1IE
R/W-0
T3IE
bit 8
R/W-0
T2IE
bit 7
R/W-0
OC2IE
R/W-0
IC2IE
U-0
—
R/W-0
T1IE
R/W-0
OC1IE
R/W-0
IC1IE
R/W-0
INT0IE
bit 0
Legend:
R = Readable bit
-n = Value at POR
bit 15-14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Unimplemented: Read as ‘0’
AD1IE: A/D Conversion Complete Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
U1TXIE: UART1 Transmitter Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
U1RXIE: UART1 Receiver Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
SPI1IE: SPI1 Transfer Complete Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
SPF1IE: SPI1 Fault Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
T3IE: Timer3 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
T2IE: Timer2 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
OC2IE: Output Compare Channel 2 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
IC2IE: Input Capture Channel 2 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
Unimplemented: Read as ‘0’
T1IE: Timer1 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
OC1IE: Output Compare Channel 1 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
IC1IE: Input Capture Channel 1 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
INT0IE: External Interrupt 0 Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
 2010 Microchip Technology Inc.
DS39951C-page 77
PIC24FJ64GA104 FAMILY
REGISTER 7-11:
R/W-0
U2TXIE
bit 15
IEC1: INTERRUPT ENABLE CONTROL REGISTER 1
R/W-0
U2RXIE
R/W-0
INT2IE(1)
R/W-0
T5IE
R/W-0
T4IE
U-0
—
U-0
—
R/W-0
INT1IE(1)
R/W-0
CNIE
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8-5
bit 4
bit 3
bit 2
bit 1
bit 0
Note 1:
R/W-0
OC3IE
U-0
—
bit 8
U-0
—
bit 15
R/W-0
OC4IE
W = Writable bit
‘1’ = Bit is set
R/W-0
CMIE
R/W-0
MI2C1IE
R/W-0
SI2C1IE
bit 0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
U2TXIE: UART2 Transmitter Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
U2RXIE: UART2 Receiver Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
INT2IE: External Interrupt 2 Enable bit(1)
1 = Interrupt request enabled
0 = Interrupt request not enabled
T5IE: Timer5 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
T4IE: Timer4 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
OC4IE: Output Compare Channel 4 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
OC3IE: Output Compare Channel 3 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
Unimplemented: Read as ‘0’
INT1IE: External Interrupt 1 Enable bit(1)
1 = Interrupt request enabled
0 = Interrupt request not enabled
CNIE: Input Change Notification Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
CMIE: Comparator Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
MI2C1IE: Master I2C1 Event Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
SI2C1IE: Slave I2C1 Event Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
If an external interrupt is enabled, the interrupt input must also be configured to an available RPn or PRIx
pin. See Section 10.4 “Peripheral Pin Select (PPS)” for more information.
DS39951C-page 78
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-12:
IEC2: INTERRUPT ENABLE CONTROL REGISTER 2
U-0
U-0
R/W-0
U-0
U-0
U-0
R/W-0
U-0
—
—
PMPIE
—
—
—
OC5IE
—
bit 15
bit 8
R/W-0
R/W-0
R/W-0
U-0
U-0
U-0
R/W-0
R/W-0
IC5IE
IC4IE
IC3IE
—
—
—
SPI2IE
SPF2IE
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-14
Unimplemented: Read as ‘0’
bit 13
PMPIE: Parallel Master Port Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 12-10
Unimplemented: Read as ‘0’
bit 9
OC5IE: Output Compare Channel 5 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 8
Unimplemented: Read as ‘0’
bit 7
IC5IE: Input Capture Channel 5 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 6
IC4IE: Input Capture Channel 4 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 5
IC3IE: Input Capture Channel 3 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 4-2
Unimplemented: Read as ‘0’
bit 1
SPI2IE: SPI2 Event Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 0
SPF2IE: SPI2 Fault Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 79
PIC24FJ64GA104 FAMILY
REGISTER 7-13:
IEC3: INTERRUPT ENABLE CONTROL REGISTER 3
U-0
R/W-0
U-0
U-0
U-0
U-0
U-0
U-0
—
RTCIE
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
U-0
—
—
—
—
—
MI2C2IE
SI2C2IE
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14
RTCIE: Real-Time Clock/Calendar Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 13-3
Unimplemented: Read as ‘0’
bit 2
MI2C2IE: Master I2C2 Event Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 1
SI2C2IE: Slave I2C2 Event Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 0
Unimplemented: Read as ‘0’
DS39951C-page 80
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-14:
IEC4: INTERRUPT ENABLE CONTROL REGISTER 4
U-0
U-0
R/W-0
U-0
U-0
U-0
U-0
R/W-0
—
—
CTMUIE
—
—
—
—
LVDIE
bit 15
bit 8
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
U-0
—
—
—
—
CRCIE
U2ERIE
U1ERIE
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-14
Unimplemented: Read as ‘0’
bit 13
CTMUIE: CTMU Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 12-9
Unimplemented: Read as ‘0’
bit 8
LVDIE: Low-Voltage Detect Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 7-4
Unimplemented: Read as ‘0’
bit 3
CRCIE: CRC Generator Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 2
U2ERIE: UART2 Error Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 1
U1ERIE: UART1 Error Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 81
PIC24FJ64GA104 FAMILY
REGISTER 7-15:
IPC0: INTERRUPT PRIORITY CONTROL REGISTER 0
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
T1IP2
T1IP1
T1IP0
—
OC1IP2
OC1IP1
OC1IP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
IC1IP2
IC1IP1
IC1IP0
—
INT0IP2
INT0IP1
INT0IP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
T1IP<2:0>: Timer1 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
OC1IP<2:0>: Output Compare Channel 1 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
IC1IP<2:0>: Input Capture Channel 1 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-0
INT0IP<2:0>: External Interrupt 0 Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
DS39951C-page 82
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-16:
IPC1: INTERRUPT PRIORITY CONTROL REGISTER 1
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
T2IP2
T2IP1
T2IP0
—
OC2IP2
OC2IP1
OC2IP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
IC2IP2
IC2IP1
IC2IP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
T2IP<2:0>: Timer2 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
OC2IP<2:0>: Output Compare Channel 2 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
IC2IP<2:0>: Input Capture Channel 2 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 83
PIC24FJ64GA104 FAMILY
REGISTER 7-17:
IPC2: INTERRUPT PRIORITY CONTROL REGISTER 2
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
U1RXIP2
U1RXIP1
U1RXIP0
—
SPI1IP2
SPI1IP1
SPI1IP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
SPF1IP2
SPF1IP1
SPF1IP0
—
T3IP2
T3IP1
T3IP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
U1RXIP<2:0>: UART1 Receiver Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
SPI1IP<2:0>: SPI1 Event Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
SPF1IP<2:0>: SPI1 Fault Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-0
T3IP<2:0>: Timer3 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
DS39951C-page 84
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-18:
IPC3: INTERRUPT PRIORITY CONTROL REGISTER 3
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
AD1IP2
AD1IP1
AD1IP0
—
U1TXIP2
U1TXIP1
U1TXIP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
AD1IP<2:0>: A/D Conversion Complete Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-0
U1TXIP<2:0>: UART1 Transmitter Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 85
PIC24FJ64GA104 FAMILY
REGISTER 7-19:
IPC4: INTERRUPT PRIORITY CONTROL REGISTER 4
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
CNIP2
CNIP1
CNIP0
—
CMIP2
CMIP1
CMIP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
MI2C1IP2
MI2C1IP1
MI2C1IP0
—
SI2C1IP2
SI2C1IP1
SI2C1IP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
CNIP<2:0>: Input Change Notification Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
CMIP<2:0>: Comparator Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
MI2C1IP<2:0>: Master I2C1 Event Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-0
SI2C1IP<2:0>: Slave I2C1 Event Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
DS39951C-page 86
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-20:
IPC5: INTERRUPT PRIORITY CONTROL REGISTER 5
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
R/W-1
R/W-0
R/W-0
—
—
—
—
—
INT1IP2
INT1IP1
INT1IP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-3
Unimplemented: Read as ‘0’
bit 2-0
INT1IP<2:0>: External Interrupt 1 Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 87
PIC24FJ64GA104 FAMILY
REGISTER 7-21:
IPC6: INTERRUPT PRIORITY CONTROL REGISTER 6
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
T4IP2
T4IP1
T4IP0
—
OC4IP2
OC4IP1
OC4IP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
OC3IP2
OC3IP1
OC3IP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
T4IP<2:0>: Timer4 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
OC4IP<2:0>: Output Compare Channel 4 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
OC3IP<2:0>: Output Compare Channel 3 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
DS39951C-page 88
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-22:
IPC7: INTERRUPT PRIORITY CONTROL REGISTER 7
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
U2TXIP2
U2TXIP1
U2TXIP0
—
U2RXIP2
U2RXIP1
U2RXIP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
INT2IP2
INT2IP1
INT2IP0
—
T5IP2
T5IP1
T5IP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
U2TXIP<2:0>: UART2 Transmitter Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
U2RXIP<2:0>: UART2 Receiver Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
INT2IP<2:0>: External Interrupt 2 Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-0
T5IP<2:0>: Timer5 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 89
PIC24FJ64GA104 FAMILY
REGISTER 7-23:
IPC8: INTERRUPT PRIORITY CONTROL REGISTER 8
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
SPI2IP2
SPI2IP1
SPI2IP0
—
SPF2IP2
SPF2IP1
SPF2IP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
SPI2IP<2:0>: SPI2 Event Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-0
SPF2IP<2:0>: SPI2 Fault Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
DS39951C-page 90
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-24:
IPC9: INTERRUPT PRIORITY CONTROL REGISTER 9
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
IC5IP2
IC5IP1
IC5IP0
—
IC4IP2
IC4IP1
IC4IP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
IC3IP2
IC3IP1
IC3IP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
IC5IP<2:0>: Input Capture Channel 5 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
IC4IP<2:0>: Input Capture Channel 4 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
IC3IP<2:0>: Input Capture Channel 3 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 91
PIC24FJ64GA104 FAMILY
REGISTER 7-25:
IPC10: INTERRUPT PRIORITY CONTROL REGISTER 10
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
OC5IP2
OC5IP1
OC5IP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
OC5IP<2:0>: Output Compare Channel 5 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
DS39951C-page 92
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-26:
IPC11: INTERRUPT PRIORITY CONTROL REGISTER 11
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
PMPIP2
PMPIP1
PMPIP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
PMPIP<2:0>: Parallel Master Port Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 93
PIC24FJ64GA104 FAMILY
REGISTER 7-27:
IPC12: INTERRUPT PRIORITY CONTROL REGISTER 12
U-0
U-0
U-0
U-0
U-0
R/W-1
R/W-0
R/W-0
—
—
—
—
—
MI2C2IP2
MI2C2IP1
MI2C2IP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
SI2C2IP2
SI2C2IP1
SI2C2IP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-11
Unimplemented: Read as ‘0’
bit 10-8
MI2C2IP<2:0>: Master I2C2 Event Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
SI2C2IP<2:0>: Slave I2C2 Event Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
DS39951C-page 94
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-28:
IPC15: INTERRUPT PRIORITY CONTROL REGISTER 15
U-0
U-0
U-0
U-0
U-0
R/W-1
R/W-0
R/W-0
—
—
—
—
—
RTCIP2
RTCIP1
RTCIP0
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-11
Unimplemented: Read as ‘0’
bit 10-8
RTCIP<2:0>: Real-Time Clock/Calendar Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7-0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 95
PIC24FJ64GA104 FAMILY
REGISTER 7-29:
IPC16: INTERRUPT PRIORITY CONTROL REGISTER 16
U-0
R/W-1
R/W-0
R/W-0
U-0
R/W-1
R/W-0
R/W-0
—
CRCIP2
CRCIP1
CRCIP0
—
U2ERIP2
U2ERIP1
U2ERIP0
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
U1ERIP2
U1ERIP1
U1ERIP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
CRCIP<2:0>: CRC Generator Error Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 11
Unimplemented: Read as ‘0’
bit 10-8
U2ERIP<2:0>: UART2 Error Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 7
Unimplemented: Read as ‘0’
bit 6-4
U1ERIP<2:0>: UART1 Error Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
DS39951C-page 96
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 7-30:
IPC18: INTERRUPT PRIORITY CONTROL REGISTER 18
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
R/W-1
R/W-0
R/W-0
—
—
—
—
—
LVDIP2
LVDIP1
LVDIP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-3
Unimplemented: Read as ‘0’
bit 2-0
LVDIP<2:0>: Low-Voltage Detect Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
REGISTER 7-31:
x = Bit is unknown
IPC19: INTERRUPT PRIORITY CONTROL REGISTER 19
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
R/W-1
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
CTMUIP2
CTMUIP1
CTMUIP0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
CTMUIP<2:0>: CTMU Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
bit 3-0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 97
PIC24FJ64GA104 FAMILY
REGISTER 7-32:
INTTREG: INTERRUPT CONTROL AND STATUS REGISTER
R-0
U-0
R/W-0
U-0
R-0
R-0
R-0
R-0
CPUIRQ
—
VHOLD
—
ILR3
ILR2
ILR1
ILR0
bit 15
bit 8
U-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
—
VECNUM6
VECNUM5
VECNUM4
VECNUM3
VECNUM2
VECNUM1
VECNUM0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
CPUIRQ: Interrupt Request from Interrupt Controller CPU bit
1 = An interrupt request has occurred but has not yet been Acknowledged by the CPU; this happens
when the CPU priority is higher than the interrupt priority
0 = No interrupt request is unacknowledged
bit 14
Unimplemented: Read as ‘0’
bit 13
VHOLD: Vector Number Capture Configuration bit
1 = The VECNUM bits contain the value of the highest priority pending interrupt
0 = The VECNUM bits contain the value of the last Acknowledged interrupt (i.e., the last interrupt that
has occurred with higher priority than the CPU, even if other interrupts are pending)
bit 12
Unimplemented: Read as ‘0’
bit 11-8
ILR<3:0>: New CPU Interrupt Priority Level bits
1111 = CPU Interrupt Priority Level is 15
•
•
•
0001 = CPU Interrupt Priority Level is 1
0000 = CPU Interrupt Priority Level is 0
bit 7
Unimplemented: Read as ‘0’
bit 6-0
VECNUM<6:0>: Pending Interrupt Vector ID bits (pending vector number is VECNUM + 8)
0111111 = Interrupt Vector pending is number 135
•
•
•
0000001 = Interrupt Vector pending is number 9
0000000 = Interrupt Vector pending is number 8
DS39951C-page 98
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
7.4
Interrupt Setup Procedures
7.4.1
INITIALIZATION
To configure an interrupt source:
1.
2.
Set the NSTDIS control bit (INTCON1<15>) if
nested interrupts are not desired.
Select the user-assigned priority level for the
interrupt source by writing the control bits in the
appropriate IPCx register. The priority level will
depend on the specific application and type of
interrupt source. If multiple priority levels are not
desired, the IPCx register control bits for all
enabled interrupt sources may be programmed
to the same non-zero value.
Note:
3.
4.
At a device Reset, the IPCx registers are
initialized, such that all user interrupt
sources are assigned to priority level 4.
Clear the interrupt flag status bit associated with
the peripheral in the associated IFSx register.
Enable the interrupt source by setting the
interrupt enable control bit associated with the
source in the appropriate IECx register.
7.4.2
7.4.3
TRAP SERVICE ROUTINE
A Trap Service Routine (TSR) is coded like an ISR,
except that the appropriate trap status flag in the
INTCON1 register must be cleared to avoid re-entry
into the TSR.
7.4.4
INTERRUPT DISABLE
All user interrupts can be disabled using the following
procedure:
1.
2.
Push the current SR value onto the software
stack using the PUSH instruction.
Force the CPU to priority level 7 by inclusive
ORing the value OEh with SRL.
To enable user interrupts, the POP instruction may be
used to restore the previous SR value.
Note that only user interrupts with a priority level of 7 or
less can be disabled. Trap sources (level 8-15) cannot
be disabled.
The DISI instruction provides a convenient way to
disable interrupts of priority levels 1-6 for a fixed period
of time. Level 7 interrupt sources are not disabled by
the DISI instruction.
INTERRUPT SERVICE ROUTINE
The method that is used to declare an ISR and initialize
the IVT with the correct vector address will depend on
the programming language (i.e., ‘C’ or assembler) and
the language development toolsuite that is used to
develop the application. In general, the user must clear
the interrupt flag in the appropriate IFSx register for the
source of the interrupt that the ISR handles. Otherwise,
the ISR will be re-entered immediately after exiting the
routine. If the ISR is coded in assembly language, it
must be terminated using a RETFIE instruction to
unstack the saved PC value, SRL value and old CPU
priority level.
 2010 Microchip Technology Inc.
DS39951C-page 99
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 100
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
8.0
OSCILLATOR
CONFIGURATION
Note:
• Software-controllable switching between various
clock sources
• Software-controllable postscaler for selective
clocking of CPU for system power savings
• A Fail-Safe Clock Monitor (FSCM) that detects
clock failure and permits safe application recovery
or shutdown
• A separate and independently configurable system
clock output for synchronizing external hardware
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
“Section 6. Oscillator” (DS39700).
The oscillator system for PIC24FJ64GA104 family
devices has the following features:
A simplified diagram of the oscillator system is shown
in Figure 8-1.
• A total of four external and internal oscillator options
as clock sources, providing 11 different clock modes
• On-chip 4x PLL to boost internal operating frequency
on select internal and external oscillator sources
FIGURE 8-1:
PIC24FJ64GA104 FAMILY CLOCK DIAGRAM
Primary Oscillator
REFOCON<15:8>
XT, HS, EC
OSCO
OSCI
4 x PLL
8 MHz
(nominal)
8 MHz
4 MHz
Postscaler
FRC
Oscillator
Reference Clock
Generator
XTPLL, HSPLL
ECPLL,FRCPLL
REFO
FRCDIV
Peripherals
CLKDIV<10:8>
FRC
CLKO
LPRC
Postscaler
LPRC
Oscillator
31 kHz (nominal)
Secondary Oscillator
SOSC
SOSCO
SOSCI
CPU
CLKDIV<14:12>
SOSCEN
Enable
Oscillator
Clock Control Logic
Fail-Safe
Clock
Monitor
WDT, PWRT
Clock Source Option
for Other Modules
 2010 Microchip Technology Inc.
DS39951C-page 101
PIC24FJ64GA104 FAMILY
8.1
CPU Clocking Scheme
8.2
The system clock source can be provided by one of
four sources:
• Primary Oscillator (POSC) on the OSCI and
OSCO pins
• Secondary Oscillator (SOSC) on the SOSCI and
SOSCO pins
• Fast Internal RC (FRC) Oscillator
• Low-Power Internal RC (LPRC) Oscillator
The Primary Oscillator and FRC sources have the
option of using the internal 4x PLL. The frequency of
the FRC clock source can optionally be reduced by the
programmable clock divider. The selected clock source
generates the processor and peripheral clock sources.
The processor clock source is divided by two to produce the internal instruction cycle clock, FCY. In this
document, the instruction cycle clock is also denoted
by FOSC/2. The internal instruction cycle clock, FOSC/2,
can be provided on the OSCO I/O pin for some
operating modes of the Primary Oscillator.
Initial Configuration on POR
The oscillator source (and operating mode) that is
used at a device Power-on Reset event is selected
using Configuration bit settings. The oscillator Configuration bit settings are located in the Configuration
registers in the program memory (refer to
Section 25.1 “Configuration Bits” for further details).
The
Primary
Oscillator
Configuration
bits,
POSCMD<1:0> (Configuration Word 2<1:0>), and
the Initial Oscillator Select Configuration bits,
FNOSC<2:0> (Configuration Word 2<10:8>), select
the oscillator source that is used at a Power-on Reset.
The FRC Primary Oscillator with postscaler (FRCDIV)
is the default (unprogrammed) selection. The Secondary Oscillator, or one of the internal oscillators, may be
chosen by programming these bit locations.
The Configuration bits allow users to choose between
the various clock modes, shown in Table 8-1.
8.2.1
CLOCK SWITCHING MODE
CONFIGURATION BITS
The FCKSM Configuration bits (Configuration
Word 2<7:6>) are used to jointly configure device clock
switching and the Fail-Safe Clock Monitor (FSCM).
Clock switching is enabled only when FCKSM1 is
programmed (‘0’). The FSCM is enabled only when the
FCKSM<1:0> bits are both programmed (‘00’).
TABLE 8-1:
CONFIGURATION BIT VALUES FOR CLOCK SELECTION
Oscillator Mode
Oscillator Source
POSCMD<1:0>
FNOSC<2:0>
Note
Fast RC Oscillator with Postscaler
(FRCDIV)
Internal
11
111
1, 2
(Reserved)
Internal
xx
110
1
Low-Power RC Oscillator (LPRC)
Internal
11
101
1
Secondary
11
100
1
Primary Oscillator (XT) with PLL
Module (XTPLL)
Primary
01
011
Primary Oscillator (EC) with PLL
Module (ECPLL)
Primary
00
011
Primary Oscillator (HS)
Primary
10
010
Primary Oscillator (XT)
Primary
01
010
Primary Oscillator (EC)
Primary
00
010
Fast RC Oscillator with PLL Module
(FRCPLL)
Internal
11
001
1
Fast RC Oscillator (FRC)
Internal
11
000
1
Secondary (Timer1) Oscillator
(SOSC)
Note 1:
2:
OSCO pin function is determined by the OSCIOFCN Configuration bit.
This is the default oscillator mode for an unprogrammed (erased) device.
DS39951C-page 102
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
8.3
Control Registers
The operation of the oscillator is controlled by three
Special Function Registers:
• OSCCON
• CLKDIV
• OSCTUN
The OSCCON register (Register 8-1) is the main control register for the oscillator. It controls clock source
switching and allows the monitoring of clock sources.
REGISTER 8-1:
The CLKDIV register (Register 8-2) controls the
features associated with Doze mode, as well as the
postscaler for the FRC Oscillator.
The OSCTUN register (Register 8-3) allows the user to
fine tune the FRC Oscillator over a range of approximately ±12%. Each bit increment or decrement
changes the factory calibrated frequency of the FRC
Oscillator by a fixed amount.
OSCCON: OSCILLATOR CONTROL REGISTER
U-0
R-0
R-0
R-0
U-0
R/W-x(1)
R/W-x(1)
R/W-x(1)
—
COSC2
COSC1
COSC0
—
NOSC2
NOSC1
NOSC0
bit 15
bit 8
R/SO-0
R/W-0
R-0(3)
U-0
R/CO-0
R/W-0
R/W-0
R/W-0
CLKLOCK
IOLOCK(2)
LOCK
—
CF
POSCEN
SOSCEN
OSWEN
bit 7
bit 0
Legend:
CO = Clearable Only bit
SO = Settable Only bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
COSC<2:0>: Current Oscillator Selection bits
111 = Fast RC Oscillator with Postscaler (FRCDIV)
110 = Reserved
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with Postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
bit 11
Unimplemented: Read as ‘0’
bit 10-8
NOSC<2:0>: New Oscillator Selection bits(1)
111 = Fast RC Oscillator with Postscaler (FRCDIV)
110 = Reserved
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with Postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
Note 1:
2:
3:
x = Bit is unknown
Reset values for these bits are determined by the FNOSC Configuration bits.
The state of the IOLOCK bit can only be changed once an unlocking sequence has been executed. In
addition, if the IOL1WAY Configuration bit is ‘1’, once the IOLOCK bit is set, it cannot be cleared.
Also resets to ‘0’ during any valid clock switch or whenever a non-PLL clock mode is selected.
 2010 Microchip Technology Inc.
DS39951C-page 103
PIC24FJ64GA104 FAMILY
REGISTER 8-1:
OSCCON: OSCILLATOR CONTROL REGISTER (CONTINUED)
bit 7
CLKLOCK: Clock Selection Lock Enabled bit
If FSCM is enabled (FCKSM1 = 1):
1 = Clock and PLL selections are locked
0 = Clock and PLL selections are not locked and may be modified by setting the OSWEN bit
If FSCM is disabled (FCKSM1 = 0):
Clock and PLL selections are never locked and may be modified by setting the OSWEN bit.
bit 6
IOLOCK: I/O Lock Enable bit(2)
1 = I/O lock is active
0 = I/O lock is not active
bit 5
LOCK: PLL Lock Status bit(3)
1 = PLL module is in lock or PLL module start-up timer is satisfied
0 = PLL module is out of lock, PLL start-up timer is running or PLL is disabled
bit 4
Unimplemented: Read as ‘0’
bit 3
CF: Clock Fail Detect bit
1 = FSCM has detected a clock failure
0 = No clock failure has been detected
bit 2
POSCEN: Primary Oscillator Sleep Enable bit
1 = Primary Oscillator continues to operate during Sleep mode
0 = Primary Oscillator disabled during Sleep mode
bit 1
SOSCEN: 32 kHz Secondary Oscillator (SOSC) Enable bit
1 = Enable Secondary Oscillator
0 = Disable Secondary Oscillator
bit 0
OSWEN: Oscillator Switch Enable bit
1 = Initiate an oscillator switch to clock source specified by NOSC<2:0> bits
0 = Oscillator switch is complete
Note 1:
2:
3:
Reset values for these bits are determined by the FNOSC Configuration bits.
The state of the IOLOCK bit can only be changed once an unlocking sequence has been executed. In
addition, if the IOL1WAY Configuration bit is ‘1’, once the IOLOCK bit is set, it cannot be cleared.
Also resets to ‘0’ during any valid clock switch or whenever a non-PLL clock mode is selected.
DS39951C-page 104
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 8-2:
R/W-0
CLKDIV: CLOCK DIVIDER REGISTER
R/W-0
ROI
R/W-0
DOZE2
DOZE1
R/W-0
R/W-0
R/W-0
R/W-0
R/W-1
DOZE0
DOZEN(1)
RCDIV2
RCDIV1
RCDIV0
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
ROI: Recover on Interrupt bit
1 = Interrupts clear the DOZEN bit and reset the CPU peripheral clock ratio to 1:1
0 = Interrupts have no effect on the DOZEN bit
bit 14-12
DOZE<2:0>: CPU Peripheral Clock Ratio Select bits
111 = 1:128
110 = 1:64
101 = 1:32
100 = 1:16
011 = 1:8
010 = 1:4
001 = 1:2
000 = 1:1
bit 11
DOZEN: DOZE Enable bit(1)
1 = DOZE<2:0> bits specify the CPU peripheral clock ratio
0 = CPU peripheral clock ratio set to 1:1
bit 10-8
RCDIV<2:0>: FRC Postscaler Select bits
111 = 31.25 kHz (divide-by-256)
110 = 125 kHz (divide-by-64)
101 = 250 kHz (divide-by-32)
100 = 500 kHz (divide-by-16)
011 = 1 MHz (divide-by-8)
010 = 2 MHz (divide-by-4)
001 = 4 MHz (divide-by-2)
000 = 8 MHz (divide-by-1)
bit 7-0
Unimplemented: Read as ‘0’
Note 1:
This bit is automatically cleared when the ROI bit is set and an interrupt occurs.
 2010 Microchip Technology Inc.
DS39951C-page 105
PIC24FJ64GA104 FAMILY
REGISTER 8-3:
OSCTUN: FRC OSCILLATOR TUNE REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
—
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
TUN5(1)
TUN4(1)
TUN3(1)
TUN2(1)
TUN1(1)
TUN0(1)
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-6
Unimplemented: Read as ‘0’
bit 5-0
TUN<5:0>: FRC Oscillator Tuning bits(1)
011111 = Maximum frequency deviation
011110 =



000001 =
000000 = Center frequency, oscillator is running at factory calibrated frequency
111111 =



100001 =
100000 = Minimum frequency deviation
Note 1:
8.4
Increments or decrements of TUN<5:0> may not change the FRC frequency in equal steps over the FRC
tuning range and may not be monotonic.
Clock Switching Operation
With few limitations, applications are free to switch
between any of the four clock sources (POSC, SOSC,
FRC and LPRC) under software control and at any
time. To limit the possible side effects that could result
from this flexibility, PIC24F devices have a safeguard
lock built into the switching process.
Note:
The Primary Oscillator mode has three
different submodes (XT, HS and EC)
which are determined by the POSCMDx
Configuration bits. While an application
can switch to and from Primary Oscillator
mode in software, it cannot switch
between the different primary submodes
without reprogramming the device.
DS39951C-page 106
8.4.1
ENABLING CLOCK SWITCHING
To enable clock switching, the FCKSM Configuration bits
in CW2 must be programmed to ‘00’. (Refer to
Section 25.1 “Configuration Bits” for further details.)
If the FCKSM Configuration bits are unprogrammed
(‘1x’), the clock switching function and Fail-Safe Clock
Monitor function are disabled. This is the default setting.
The NOSCx control bits (OSCCON<10:8>) do not
control the clock selection when clock switching is disabled. However, the COSCx bits (OSCCON<14:12>)
will reflect the clock source selected by the FNOSCx
Configuration bits.
The OSWEN control bit (OSCCON<0>) has no effect
when clock switching is disabled. It is held at ‘0’ at all
times.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
8.4.2
OSCILLATOR SWITCHING
SEQUENCE
A recommended code sequence for a clock switch
includes the following:
At a minimum, performing a clock switch requires this
basic sequence:
1.
1.
2.
2.
3.
4.
5.
If
desired,
read
the
COSCx
bits
(OSCCON<14:12>), to determine the current
oscillator source.
Perform the unlock sequence to allow a write to
the OSCCON register high byte.
Write the appropriate value to the NOSCx bits
(OSCCON<10:8>) for the new oscillator source.
Perform the unlock sequence to allow a write to
the OSCCON register low byte.
Set the OSWEN bit to initiate the oscillator
switch.
3.
4.
5.
Once the basic sequence is completed, the system
clock hardware responds automatically as follows:
6.
1.
7.
2.
3.
4.
5.
6.
The clock switching hardware compares the
COSCx bits with the new value of the NOSCx
bits. If they are the same, then the clock switch
is a redundant operation. In this case, the
OSWEN bit is cleared automatically and the
clock switch is aborted.
If a valid clock switch has been initiated, the
LOCK (OSCCON<5>) and CF (OSCCON<3>)
bits are cleared.
The new oscillator is turned on by the hardware
if it is not currently running. If a crystal oscillator
must be turned on, the hardware will wait until
the OST expires. If the new source is using the
PLL, then the hardware waits until a PLL lock is
detected (LOCK = 1).
The hardware waits for 10 clock cycles from the
new clock source and then performs the clock
switch.
The hardware clears the OSWEN bit to indicate a
successful clock transition. In addition, the
NOSCx bit values are transferred to the COSCx
bits.
The old clock source is turned off at this time, with
the exception of LPRC (if WDT or FSCM are
enabled) or SOSC (if SOSCEN remains set).
Note 1: The processor will continue to execute
code throughout the clock switching
sequence. Timing sensitive code should
not be executed during this time.
8.
Disable interrupts during the OSCCON register
unlock and write sequence.
Execute the unlock sequence for the OSCCON
high byte by writing 78h and 9Ah to
OSCCON<15:8>
in
two
back-to-back
instructions.
Write new oscillator source to the NOSCx bits in
the instruction immediately following the unlock
sequence.
Execute the unlock sequence for the OSCCON
low byte by writing 46h and 57h to
OSCCON<7:0> in two back-to-back instructions.
Set the OSWEN bit in the instruction immediately
following the unlock sequence.
Continue to execute code that is not clock
sensitive (optional).
Invoke an appropriate amount of software delay
(cycle counting) to allow the selected oscillator
and/or PLL to start and stabilize.
Check to see if OSWEN is ‘0’. If it is, the switch
was successful. If OSWEN is still set, then
check the LOCK bit to determine the cause of
failure.
The core sequence for unlocking the OSCCON register
and initiating a clock switch is shown in Example 8-1.
EXAMPLE 8-1:
BASIC CODE SEQUENCE
FOR CLOCK SWITCHING
;Place the new oscillator selection in W0
;OSCCONH (high byte) Unlock Sequence
MOV
#OSCCONH, w1
MOV
#0x78, w2
MOV
#0x9A, w3
MOV.b
w2, [w1]
MOV.b
w3, [w1]
;Set new oscillator selection
MOV.b
WREG, OSCCONH
;OSCCONL (low byte) unlock sequence
MOV
#OSCCONL, w1
MOV
#0x46, w2
MOV
#0x57, w3
MOV.b
w2, [w1]
MOV.b
w3, [w1]
;Start oscillator switch operation
BSET
OSCCON,#0
2: Direct clock switches between any
Primary Oscillator mode with PLL and
FRCPLL mode are not permitted. This
applies to clock switches in either direction. In these instances, the application
must switch to FRC mode as a transition
clock source between the two PLL
modes.
 2010 Microchip Technology Inc.
DS39951C-page 107
PIC24FJ64GA104 FAMILY
8.5
8.5.1
Secondary Oscillator (SOSC)
BASIC SOSC OPERATION
PIC24FJ64GA104 family devices do not have to set the
SOSCEN bit to use the Secondary Oscillator. Any
module requiring the SOSC (such as RTCC, Timer1 or
DSWDT) will automatically turn on the SOSC when the
clock signal is needed. The SOSC, however, has a long
start-up time. To avoid delays for peripheral start-up, the
SOSC can be manually started using the SOSCEN bit.
To use the Secondary Oscillator, the SOSCSEL<1:0>
bits (CW3<9:8>) must be configured in an oscillator
mode – either ‘11’ or ‘01’. Setting SOSCSEL to ‘00’
configures the SOSC pins for Digital mode, enabling
digital I/O functionality on the pins. Digital functionality
will not be available if the SOSC is configured in either
of the oscillator modes.
8.5.2
LOW-POWER SOSC OPERATION
The Secondary Oscillator can operate in two distinct
levels of power consumption based on device configuration. In Low-Power mode, the oscillator operates in a
low drive strength, low-power state. By default, the
oscillator uses a higher drive strength, and therefore,
requires more power. The Secondary Oscillator Mode
Configuration bits, SOSCSEL<1:0> (CW3<9:8>),
determine the oscillator’s power mode. Programming
the SOSCSEL bits to ‘01’ selects low-power operation.
The lower drive strength of this mode makes the SOSC
more sensitive to noise and requires a longer start-up
time. When Low-Power mode is used, care must be
taken in the design and layout of the SOSC circuit to
ensure that the oscillator starts up and oscillates
properly.
8.5.3
EXTERNAL (DIGITAL) CLOCK
MODE (SCLKI)
The SOSC can also be configured to run from an
external 32 kHz clock source, rather than the internal
oscillator. In this mode, also referred to as Digital mode,
the clock source provided on the SCLKI pin is used to
clock any modules that are configured to use the
Secondary Oscillator. In this mode, the crystal driving
circuit is disabled and the SOSCEN bit (OSCCON<1>)
has no effect.
8.5.4
In general, the crystal circuit connections should be as
short as possible. It is also good practice to surround
the crystal circuit with a ground loop or ground plane.
For more information on crystal circuit design, please
refer to Section 6 “Oscillator” (DS39700) of the
“PIC24F Family Reference Manual”. Additional information is also available in these Microchip Application
Notes:
• AN826, “Crystal Oscillator Basics and Crystal
Selection for rfPIC® and PICmicro® Devices”
(DS00826)
• AN849, “Basic PICmicro® Oscillator Design”
(DS00849).
8.6
Reference Clock Output
In addition to the CLKO output (FOSC/2) available in
certain oscillator modes, the device clock in the
PIC24FJ64GA104 family devices can also be configured to provide a reference clock output signal to a port
pin. This feature is available in all oscillator configurations and allows the user to select a greater range of
clock submultiples to drive external devices in the
application.
This reference clock output is controlled by the
REFOCON register (Register 8-4). Setting the ROEN
bit (REFOCON<15>) makes the clock signal available
on the REFO pin. The RODIV bits (REFOCON<11:8>)
enable the selection of 16 different clock divider
options.
The ROSSLP and ROSEL bits (REFOCON<13:12>)
control the availability of the reference output during
Sleep mode. The ROSEL bit determines if the oscillator
on OSC1 and OSC2, or the current system clock source,
is used for the reference clock output. The ROSSLP bit
determines if the reference source is available on REFO
when the device is in Sleep mode.
To use the reference clock output in Sleep mode, both
the ROSSLP and ROSEL bits must be set. The device
clock must also be configured for one of the primary
modes (EC, HS or XT); otherwise, if the POSCEN bit is
not also set, the oscillator on OSC1 and OSC2 will be
powered down when the device enters Sleep mode.
Clearing the ROSEL bit allows the reference output
frequency to change as the system clock changes
during any clock switches.
SOSC LAYOUT CONSIDERATIONS
The pinout limitations on low pin count devices, such as
those in the PIC24FJ64GA104 family, may make the
SOSC more susceptible to noise than other PIC24F
devices. Unless proper care is taken in the design and
layout of the SOSC circuit, this external noise may
introduce inaccuracies into the oscillator’s period.
DS39951C-page 108
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 8-4:
REFOCON: REFERENCE OSCILLATOR CONTROL REGISTER
R/W-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ROEN
—
ROSSLP
ROSEL
RODIV3
RODIV2
RODIV1
RODIV0
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
ROEN: Reference Oscillator Output Enable bit
1 = Reference oscillator is enabled on REFO pin
0 = Reference oscillator is disabled
bit 14
Unimplemented: Read as ‘0’
bit 13
ROSSLP: Reference Oscillator Output Stop in Sleep bit
1 = Reference oscillator continues to run in Sleep
0 = Reference oscillator is disabled in Sleep
bit 12
ROSEL: Reference Oscillator Source Select bit
1 = Primary Oscillator is used as the base clock. Note that the crystal oscillator must be enabled using
the FOSC<2:0> bits; the crystal maintains the operation in Sleep mode.
0 = System clock is used as the base clock; base clock reflects any clock switching of the device
bit 11-8
RODIV<3:0>: Reference Oscillator Divisor Select bits
1111 = Base clock value divided by 32,768
1110 = Base clock value divided by 16,384
1101 = Base clock value divided by 8,192
1100 = Base clock value divided by 4,096
1011 = Base clock value divided by 2,048
1010 = Base clock value divided by 1,024
1001 = Base clock value divided by 512
1000 = Base clock value divided by 256
0111 = Base clock value divided by 128
0110 = Base clock value divided by 64
0101 = Base clock value divided by 32
0100 = Base clock value divided by 16
0011 = Base clock value divided by 8
0010 = Base clock value divided by 4
0001 = Base clock value divided by 2
0000 = Base clock value
bit 7-0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
DS39951C-page 109
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 110
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
9.0
Note:
POWER-SAVING FEATURES
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 39. “Power-Saving Features
with Deep Sleep” (DS39727).
The PIC24FJ64GA104 family of devices provides the
ability to manage power consumption by selectively
managing clocking to the CPU and the peripherals. In
general, a lower clock frequency and a reduction in the
number of circuits being clocked constitutes lower
consumed power. All PIC24F devices manage power
consumption in four different ways:
• Clock Frequency
• Instruction-Based Sleep, Idle and Deep Sleep
modes
• Software Controlled Doze mode
• Selective Peripheral Control in Software
Combinations of these methods can be used to
selectively tailor an application’s power consumption,
while still maintaining critical application features, such
as timing-sensitive communications.
9.1
Clock Frequency and Clock
Switching
PIC24F devices allow for a wide range of clock
frequencies to be selected under application control. If
the system clock configuration is not locked, users can
choose low-power or high-precision oscillators by simply
changing the NOSC bits. The process of changing a
system clock during operation, as well as limitations to
the process, are discussed in more detail in Section 8.0
“Oscillator Configuration”.
9.2
Instruction-Based Power-Saving
Modes
PIC24F devices have two special power-saving modes
that are entered through the execution of a special
PWRSAV instruction. Sleep mode stops clock operation
and halts all code execution; Idle mode halts the CPU
and code execution, but allows peripheral modules to
continue operation. Deep Sleep mode stops clock
operation, code execution and all peripherals except
RTCC and DSWDT. It also freezes I/O states and
removes power to SRAM and Flash memory.
EXAMPLE 9-1:
PWRSAV
PWRSAV
BSET
PWRSAV
The assembly syntax of the PWRSAV instruction is
shown in Example 9-1.
Note:
SLEEP_MODE and IDLE_MODE are
constants defined in the assembler
include file for the selected device.
Sleep and Idle modes can be exited as a result of an
enabled interrupt, WDT time-out or a device Reset.
When the device exits these modes, it is said to
“wake-up”.
9.2.1
SLEEP MODE
Sleep mode has these features:
• The system clock source is shut down. If an
on-chip oscillator is used, it is turned off.
• The device current consumption will be reduced
to a minimum provided that no I/O pin is sourcing
current.
• The I/O pin directions and states are frozen.
• The Fail-Safe Clock Monitor does not operate
during Sleep mode since the system clock source
is disabled.
• The LPRC clock will continue to run in Sleep
mode if the WDT or RTCC with LPRC as clock
source is enabled.
• The WDT, if enabled, is automatically cleared
prior to entering Sleep mode.
• Some device features or peripherals may
continue to operate in Sleep mode. This includes
items, such as the input change notification on the
I/O ports, or peripherals that use an external clock
input. Any peripheral that requires the system
clock source for its operation will be disabled in
Sleep mode.
The device will wake-up from Sleep mode on any of
these events:
• On any interrupt source that is individually
enabled
• On any form of device Reset
• On a WDT time-out
On wake-up from Sleep, the processor will restart with
the same clock source that was active when Sleep
mode was entered.
PWRSAV INSTRUCTION SYNTAX
#SLEEP_MODE
#IDLE_MODE
DSCON, #DSEN
#SLEEP_MODE
 2010 Microchip Technology Inc.
;
;
;
;
Put the device into SLEEP mode
Put the device into IDLE mode
Enable Deep Sleep
Put the device into Deep SLEEP mode
DS39951C-page 111
PIC24FJ64GA104 FAMILY
9.2.2
IDLE MODE
Note:
Idle mode has these features:
• The CPU will stop executing instructions.
• The WDT is automatically cleared.
• The system clock source remains active. By
default, all peripheral modules continue to operate
normally from the system clock source, but can
also be selectively disabled (see Section 9.4
“Selective Peripheral Module Control”).
• If the WDT or FSCM is enabled, the LPRC will
also remain active.
The device will wake from Idle mode on any of these
events:
• Any interrupt that is individually enabled
• Any device Reset
• A WDT time-out
9.2.4.1
INTERRUPTS COINCIDENT WITH
POWER SAVE INSTRUCTIONS
Any interrupt that coincides with the execution of a
PWRSAV instruction (except for Deep Sleep) will be held
off until entry into Sleep or Idle mode has completed.
The device will then wake-up from Sleep or Idle mode.
9.2.4
DEEP SLEEP MODE
In PIC24FJ64GA104 family devices, Deep Sleep mode
is intended to provide the lowest levels of power
consumption available, without requiring the use of
external switches to completely remove all power from
the device. Entry into Deep Sleep mode is completely
under software control. Exit from Deep Sleep mode can
be triggered from any of the following events:
•
•
•
•
•
POR event
MCLR event
RTCC alarm (If the RTCC is present)
External Interrupt 0
Deep Sleep Watchdog Timer (DSWDT) time-out
In Deep Sleep mode, it is possible to keep the device
Real-Time Clock and Calendar (RTCC) running without
the loss of clock cycles.
Entering Deep Sleep Mode
Deep Sleep mode is entered by setting the DSEN bit in
the DSCON register, and then executing a SLEEP
instruction (PWRSAV #SLEEP_MODE) within one to three
instruction cycles to minimize the chance that Deep
Sleep will be spuriously entered.
If the PWRSAV command is not given within three
instruction cycles, the DSEN bit will be cleared by the
hardware and must be set again by the software before
entering Deep Sleep mode. The DSEN bit is also
automatically cleared when exiting the Deep Sleep
mode.
On wake-up from Idle, the clock is reapplied to the CPU
and instruction execution begins immediately, starting
with the instruction following the PWRSAV instruction or
the first instruction in the ISR.
9.2.3
Since Deep Sleep mode powers down the
microcontroller by turning off the on-chip
VDDCORE voltage regulator, Deep Sleep
capability is available only when operating
with the internal regulator enabled.
Note:
To re-enter Deep Sleep after a Deep Sleep
wake-up, allow a delay of at least 3 TCY
after clearing the RELEASE bit.
The sequence to enter Deep Sleep mode is:
1.
2.
3.
4.
5.
6.
If the application requires the Deep Sleep WDT,
enable it and configure its clock source (see
Section 9.2.4.7 “Deep Sleep WDT” for
details).
If the application requires Deep Sleep BOR,
enable it by programming the DSBOREN
Configuration bit (CW4<6>).
If the application requires wake-up from Deep
Sleep on RTCC alarm, enable and configure the
RTCC module (see Section 19.0 “Real-Time
Clock and Calendar (RTCC)” for more
information).
If needed, save any critical application context
data by writing it to the DSGPR0 and DSGPR1
registers (optional).
Enable Deep Sleep mode by setting the DSEN
bit (DSCON<15>).
Enter Deep Sleep mode by immediately issuing
a PWRSAV #0 instruction.
Any time the DSEN bit is set, all bits in the DSWAKE
register will be automatically cleared.
The device has a dedicated Deep Sleep Brown-out
Reset (DSBOR) and a Deep Sleep Watchdog Timer
Reset (DSWDT) for monitoring voltage and time-out
events. The DSBOR and DSWDT are independent of
the standard BOR and WDT used with other
power-managed modes (Sleep, Idle and Doze).
DS39951C-page 112
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
9.2.4.2
Special Cases when Entering Deep
Sleep Mode
When entering Deep Sleep mode, there are certain
circumstances that require a delay between setting the
DSEN bit and executing the PWRSAV instruction. These
can be generally reduced to three scenarios:
1.
2.
3.
Scenario (1): use an external wake-up source
(INT0) or the RTCC is used
Scenario (2): with application-level interrupts
that can be temporarily disabled
Scenario (3): with interrupts that must be
monitored
In the first scenario, the application requires a wake-up
from Deep Sleep on the assertion of the INT0 pin or the
RTCC interrupt. In this case, three NOP instructions
must be inserted to properly synchronize the detection
of an asynchronous INT0 interrupt after the device
enters Deep Sleep mode. If the application does not
use wake-up on INT0 or RTCC, the NOP instructions
are optional.
In the second scenario, the application also uses
interrupts which can be briefly ignored. With these
applications, an interrupt event during the execution of
the NOP instructions may cause an ISR to be executed.
This means that more than three instruction cycles will
elapse before returning to the code and that the DSEN
bit will be cleared. To prevent the missed entry into
Deep Sleep, temporarily disable interrupts prior to
entering Deep Sleep mode. Invoking the DISI instruction for four cycles is sufficient to prevent interrupts
from disrupting Deep Sleep entry.
In the third scenario, interrupts cannot be ignored even
briefly; constant interrupt detection is required, even
during the interval between setting DSEN and
executing the PWRSAV instruction. For these cases, it is
possible to disable interrupts and test for an interrupt
condition, skipping the PWRSAV instruction if necessary.
Testing for interrupts can be accomplished by checking
the status of the CPUIRQ bit (INTTREG<15>). If an
unserviced interrupt is pending, this bit will be set. If
CPUIRQ is set prior to executing the PWRSAV instruction, the instruction is skipped. At this point, the DISI
instruction has expired (being more than 4 instructions
from when it was executed) and the application vectors
to the appropriate ISR. When the application returns, it
can either attempt to re-enter Deep Sleep mode or perform some other system function. In either case, the
application must have some functional code located,
following the PWRSAV instruction, in the event that the
PWRSAV instruction is skipped and the device does not
enter Deep Sleep mode.
 2010 Microchip Technology Inc.
Examples for implementing these cases are shown in
Example 9-2. It is recommended that an assembler, or
in-line C routine be used in these cases, to ensure that
the code executes in the number of cycles required.
EXAMPLE 9-2:
IMPLEMENTING THE
SPECIAL CASES FOR
ENTERING DEEP SLEEP
// Case 1: simplest delay scenario
//
asm("bset DSCON, #15");
asm("nop");
asm("nop");
asm("nop");
asm("pwrsav #0");
//
// Case 2: interrupts disabled
//
asm("disi #4");
asm("bset DSCON, #15");
asm("nop");
asm("nop");
asm("nop");
asm("pwrsav #0");
//
// Case 3: interrupts disabled with
// interrupt testing
//
asm("disi #4");
asm("bset DSCON, #15");
asm("nop");
asm("nop");
asm("btss INTTREG, #15");
asm("pwrsav #0");
// continue with application code here
//
DS39951C-page 113
PIC24FJ64GA104 FAMILY
9.2.4.3
Exiting Deep Sleep Mode
Deep Sleep mode exits on any one of the following events:
• POR event on VDD supply. If there is no DSBOR
circuit to re-arm the VDD supply POR circuit, the
external VDD supply must be lowered to the
natural arming voltage of the POR circuit.
• DSWDT time-out. When the DSWDT timer times
out, the device exits Deep Sleep.
• RTCC alarm (if RTCEN = 1).
• Assertion (‘0’) of the MCLR pin.
• Assertion of the INT0 pin (if the interrupt was
enabled before Deep Sleep mode was entered).
The polarity configuration is used to determine the
assertion level (‘0’ or ‘1’) of the pin that will cause
an exit from Deep Sleep mode. Exiting from Deep
Sleep mode requires a change on the INT0 pin
while in Deep Sleep mode.
Note:
Any interrupt pending when entering Deep
Sleep mode is cleared.
Exiting Deep Sleep mode generally does not retain the
state of the device and is equivalent to a Power-on
Reset (POR) of the device. Exceptions to this include
the RTCC (if present), which remains operational
through the wake-up, the DSGPRx registers and the
DSWDT bit.
9.2.4.4
Deep Sleep Wake-up Time
Since wake-up from Deep Sleep results in a POR, the
wake-up time from Deep Sleep is the same as the
device POR time. Also, because the internal regulator
is turned off, the voltage on VCAP may drop depending
on how long the device is asleep. If VCAP has dropped
below 2V, then there will be additional wake-up time
while the regulator charges VCAP.
Deep Sleep wake-up time is specified in Section 28.0
“Electrical Characteristics” as TDSWU. This specification indicates the worst-case wake-up time, including
the full POR Reset time (including TPOR and TRST), as
well as the time to fully charge a 10 F capacitor on
VCAP which has discharged to 0V. Wake-up may be
significantly faster if VCAP has not discharged.
9.2.4.5
Saving Context Data with the
DSGPR0/DSGPR1 Registers
As exiting Deep Sleep mode causes a POR, most
Special Function Registers reset to their default POR
values. In addition, because VDDCORE power is not
supplied in Deep Sleep mode, information in data RAM
may be lost when exiting this mode.
The sequence for exiting Deep Sleep mode is:
Applications which require critical data to be saved
prior to Deep Sleep may use the Deep Sleep General
Purpose registers, DSGPR0 and DSGPR1, or data
EEPROM (if available). Unlike other SFRs, the contents of these registers are preserved while the device
is in Deep Sleep mode. After exiting Deep Sleep,
software can restore the data by reading the registers
and clearing the RELEASE bit (DSCON<0>).
1.
9.2.4.6
Wake-up events that occur from the time Deep Sleep
exits, until the time that the POR sequence completes,
are ignored, and are not captured in the DSWAKE
register.
2.
3.
4.
5.
6.
After a wake-up event, the device exits Deep
Sleep and performs a POR. The DSEN bit is
cleared automatically. Code execution resumes
at the Reset vector.
To determine if the device exited Deep Sleep,
read the Deep Sleep bit, DPSLP (RCON<10>).
This bit will be set if there was an exit from Deep
Sleep mode. If the bit is set, clear it.
Determine the wake-up source by reading the
DSWAKE register.
Determine if a DSBOR event occurred during
Deep Sleep mode by reading the DSBOR bit
(DSCON<1>).
If application context data has been saved, read
it back from the DSGPR0 and DSGPR1
registers.
Clear the RELEASE bit (DSCON<0>).
DS39951C-page 114
I/O Pins During Deep Sleep
During Deep Sleep, the general purpose I/O pins retain
their previous states and the Secondary Oscillator
(SOSC) will remain running, if enabled. Pins that are
configured as inputs (TRIS bit is set) prior to entry into
Deep Sleep remain high-impedance during Deep
Sleep. Pins that are configured as outputs (TRIS bit is
clear) prior to entry into Deep Sleep remain as output
pins during Deep Sleep. While in this mode, they
continue to drive the output level determined by their
corresponding LAT bit at the time of entry into Deep
Sleep.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
Once the device wakes back up, all I/O pins continue to
maintain their previous states, even after the device
has finished the POR sequence and is executing application code again. Pins configured as inputs during
Deep Sleep remain high-impedance and pins configured as outputs continue to drive their previous value.
After waking up, the TRIS and LAT registers, and the
SOSCEN bit (OSCCON<1>) are reset. If firmware
modifies any of these bits or registers, the I/O will not
immediately go to the newly configured states. Once
the firmware clears the RELEASE bit (DSCON<0>) the
I/O pins are “released”. This causes the I/O pins to take
the states configured by their respective TRIS and LAT
bit values.
This means that keeping the SOSC running after
waking up requires the SOSCEN bit to be set before
clearing RELEASE.
If the Deep Sleep BOR (DSBOR) is enabled, and a
DSBOR or a true POR event occurs during Deep
Sleep, the I/O pins will be immediately released similar
to clearing the RELEASE bit. All previous state information will be lost, including the general purpose
DSGPR0 and DSGPR1 contents.
If a MCLR Reset event occurs during Deep Sleep, the
DSGPRx, DSCON and DSWAKE registers will remain
valid and the RELEASE bit will remain set. The state of
the SOSC will also be retained. The I/O pins, however,
will be reset to their MCLR Reset state. Since
RELEASE is still set, changes to the SOSCEN bit
(OSCCON<1>) cannot take effect until the RELEASE
bit is cleared.
In all other Deep Sleep wake-up cases, application
firmware must clear the RELEASE bit in order to
reconfigure the I/O pins.
9.2.4.7
Deep Sleep WDT
To enable the DSWDT in Deep Sleep mode, program
the Configuration bit, DSWDTEN (CW4<7>). The
device Watchdog Timer (WDT) need not be enabled for
the DSWDT to function. Entry into Deep Sleep mode
automatically resets the DSWDT.
9.2.4.8
Switching Clocks in Deep Sleep Mode
Both the RTCC and the DSWDT may run from either
SOSC or the LPRC clock source. This allows both the
RTCC and DSWDT to run without requiring both the
LPRC and SOSC to be enabled together, reducing
power consumption.
Running the RTCC from LPRC will result in a loss of
accuracy in the RTCC of approximately 5 to 10%. If an
accurate RTCC is required, it must be run from the
SOSC clock source. The RTCC clock source is selected
with the RTCOSC Configuration bit (CW4<5>).
Under certain circumstances, it is possible for the
DSWDT clock source to be off when entering Deep
Sleep mode. In this case, the clock source is turned on
automatically (if DSWDT is enabled), without the need
for software intervention. However, this can cause a
delay in the start of the DSWDT counters. In order to
avoid this delay when using SOSC as a clock source,
the application can activate SOSC prior to entering
Deep Sleep mode.
9.2.4.9
Checking and Clearing the Status of
Deep Sleep
Upon entry into Deep Sleep mode, the status bit,
DPSLP (RCON<10>), becomes set and must be
cleared by software.
On power-up, the software should read this status bit to
determine if the Reset was due to an exit from Deep
Sleep mode and clear the bit if it is set. Of the four
possible combinations of DPSLP and POR bit states,
three cases can be considered:
• Both the DPSLP and POR bits are cleared. In this
case, the Reset was due to some event other
than a Deep Sleep mode exit.
• The DPSLP bit is clear, but the POR bit is set.
This is a normal Power-on Reset.
• Both the DPSLP and POR bits are set. This
means that Deep Sleep mode was entered, the
device was powered down and Deep Sleep mode
was exited.
The DSWDT clock source is selected by the
DSWDTOSC Configuration bit (CW4<4>). The
postscaler options are programmed by the
DSWDTPS<3:0> Configuration bits (CW4<3:0>). The
minimum time-out period that can be achieved is
2.1 ms and the maximum is 25.7 days. For more
details on the CW4 Configuration register and DSWDT
configuration options, refer to Section 25.0 “Special
Features”.
 2010 Microchip Technology Inc.
DS39951C-page 115
PIC24FJ64GA104 FAMILY
9.2.4.10
Power-on Resets (PORs)
9.2.4.11
Summary of Deep Sleep Sequence
VDD voltage is monitored to produce PORs. Since exiting from Deep Sleep functionally looks like a POR, the
technique described in Section 9.2.4.9 “Checking
and Clearing the Status of Deep Sleep” should be
used to distinguish between Deep Sleep and a true
POR event.
To review, these are the necessary steps involved in
invoking and exiting Deep Sleep mode:
When a true POR occurs, the entire device, including
all Deep Sleep logic (Deep Sleep registers, RTCC,
DSWDT, etc.) is reset.
3.
1.
2.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
DS39951C-page 116
Device exits Reset and begins to execute its
application code.
If DSWDT functionality is required, program the
appropriate Configuration bit.
Select the appropriate clock(s) for the DSWDT
and RTCC (optional).
Enable and configure the RTCC (optional).
Write context data to the DSGPRx registers
(optional).
Enable the INT0 interrupt (optional).
Set the DSEN bit in the DSCON register.
Enter Deep Sleep by issuing a PWRSV
#SLEEP_MODE command.
Device exits Deep Sleep when a wake-up event
occurs.
The DSEN bit is automatically cleared.
Read and clear the DPSLP status bit in RCON,
and the DSWAKE status bits.
Read the DSGPRx registers (optional).
Once all state related configurations are
complete, clear the RELEASE bit.
Application resumes normal operation.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 9-1:
DSCON: DEEP SLEEP CONTROL REGISTER
R/W-0, HC
U-0
U-0
U-0
U-0
U-0
U-0
U-0
DSEN(1)
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
—
—
U-0
—
U-0
—
U-0
—
U-0
—
R/W-0, HCS
R/C-0, HS
(1,2,3)
RELEASE(1,2)
DSBOR
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
C = Clearable bit
U = Unimplemented, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
HC = Hardware Clearable bit
HS = Hardware Settable bit
HCS = Hardware Clearable/Settable bit
bit 15
DSEN: Deep Sleep Enable bit(1)
1 = Device enters Deep Sleep when PWRSAV #0 is executed in the next instruction
0 = Device enters normal Sleep when PWRSAV #0 is executed
bit 14-2
Unimplemented: Read as ‘0’
bit 1
DSBOR: Deep Sleep BOR Event Status bit(1,2,3)
1 = The DSBOR was active and a BOR event was detected during Deep Sleep
0 = The DSBOR was disabled or was active and did not detect a BOR event during Deep Sleep
bit 0
RELEASE: I/O Pin State Deep Sleep Release bit(1,2)
1 = I/O pins and SOSC maintain their states following exit from Deep Sleep, regardless of their LAT
and TRIS configuration
0 = I/O pins and SOSC are released from their Deep Sleep states. The pin state is controlled by the
LAT and TRIS configurations, and the SOSCEN bit.
Note 1:
2:
3:
These bits are reset only in the case of a POR event outside of Deep Sleep mode.
Reset value is ‘0’ for initial power-on POR only and ‘1’ for Deep Sleep POR.
This is a status bit only; a DSBOR event will NOT cause a wake-up from Deep Sleep.
 2010 Microchip Technology Inc.
DS39951C-page 117
PIC24FJ64GA104 FAMILY
REGISTER 9-2:
DSWAKE: DEEP SLEEP WAKE-UP SOURCE REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0, HS
—
—
—
—
—
—
—
DSINT0(1)
bit 15
bit 8
R/W-0, HS
DSFLT
U-0
(1)
—
U-0
—
R/W-0, HS
R/W-0, HS
R/W-0, HS
(1)
(1)
(1)
DSWDT
DSRTC
U-0
R/W-0, HS
—
DSPOR(2)
DSMCLR
bit 7
bit 0
Legend:
HS = Hardware Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-9
Unimplemented: Read as ‘0’
bit 8
DSINT0: Interrupt-on-Change bit(1)
1 = External Interrupt 0 was asserted during Deep Sleep
0 = External Interrupt 0 was not asserted during Deep Sleep
bit 7
DSFLT: Deep Sleep Fault Detected bit(1)
1 = A Fault occurred during Deep Sleep and some Deep Sleep configuration settings may have been
corrupted
0 = No Fault was detected during Deep Sleep
bit 6-5
Unimplemented: Read as ‘0’
bit 4
DSWDT: Deep Sleep Watchdog Timer Time-out bit(1)
1 = The Deep Sleep Watchdog Timer timed out during Deep Sleep
0 = The Deep Sleep Watchdog Timer did not time out during Deep Sleep
bit 3
DSRTC: Real-Time Clock and Calendar Alarm bit(1)
1 = The Real-Time Clock and Calendar triggered an alarm during Deep Sleep
0 = The Real-Time Clock and Calendar did not trigger an alarm during Deep Sleep
bit 2
DSMCLR: Deep Sleep MCLR Event bit(1)
1 = The MCLR pin was asserted during Deep Sleep
0 = The MCLR pin was not asserted during Deep Sleep
bit 1
Unimplemented: Read as ‘0’
bit 0
DSPOR: Power-on Reset Event bit(2)
1 = The VDD supply POR circuit was active and a POR event was detected
0 = The VDD supply POR circuit was not active, or was active, but did not detect a POR event
Note 1:
2:
This bit can only be set while the device is in Deep Sleep mode.
This bit can be set outside of Deep Sleep.
DS39951C-page 118
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
9.3
Doze Mode
Generally, changing clock speed and invoking one of
the power-saving modes are the preferred strategies
for reducing power consumption. There may be
circumstances, however, where this is not practical. For
example, it may be necessary for an application to
maintain uninterrupted synchronous communication,
even while it is doing nothing else. Reducing system
clock speed may introduce communication errors,
while using a power-saving mode may stop
communications completely.
Doze mode is a simple and effective alternative method
to reduce power consumption while the device is still
executing code. In this mode, the system clock continues to operate from the same source and at the same
speed. Peripheral modules continue to be clocked at
the same speed while the CPU clock speed is reduced.
Synchronization between the two clock domains is
maintained, allowing the peripherals to access the
SFRs while the CPU executes code at a slower rate.
Doze mode is enabled by setting the DOZEN bit
(CLKDIV<11>). The ratio between peripheral and core
clock speed is determined by the DOZE<2:0> bits
(CLKDIV<14:12>). There are eight possible
configurations, from 1:1 to 1:128, with 1:1 being the
default.
It is also possible to use Doze mode to selectively
reduce power consumption in event driven applications. This allows clock-sensitive functions, such as
synchronous communications, to continue without
interruption while the CPU Idles, waiting for something
to invoke an interrupt routine. Enabling the automatic
return to full-speed CPU operation on interrupts is
enabled by setting the ROI bit (CLKDIV<15>). By
default, interrupt events have no effect on Doze mode
operation.
9.4
Selective Peripheral Module
Control
Idle and Doze modes allow users to substantially
reduce power consumption by slowing or stopping the
CPU clock. Even so, peripheral modules still remain
clocked, and thus, consume power. There may be
cases where the application needs what these modes
do not provide: the allocation of power resources to
CPU processing with minimal power consumption from
the peripherals.
PIC24F devices address this requirement by allowing
peripheral modules to be selectively disabled, reducing
or eliminating their power consumption. This can be
done with two control bits:
• The Peripheral Enable bit, generically named
“XXXEN”, located in the module’s main control
SFR.
• The Peripheral Module Disable (PMD) bit,
generically named “XXXMD”, located in one of the
PMD Control registers.
Both bits have similar functions in enabling or disabling
its associated module. Setting the PMD bit for a module
disables all clock sources to that module, reducing its
power consumption to an absolute minimum. In this
state, the control and status registers associated with
the peripheral will also be disabled, so writes to those
registers will have no effect and read values will be
invalid. Many peripheral modules have a corresponding
PMD bit.
In contrast, disabling a module by clearing its XXXEN bit
disables its functionality, but leaves its registers available
to be read and written to. This reduces power consumption, but not by as much as setting the PMD bit does.
Most peripheral modules have an enable bit; exceptions
include input capture, output compare and RTCC.
To achieve more selective power savings, peripheral
modules can also be selectively disabled when the
device enters Idle mode. This is done through the
control bit of the generic name format, “XXXIDL”. By
default, all modules that can operate during Idle mode
will do so. Using the disable on Idle feature allows
further reduction of power consumption during Idle
mode, enhancing power savings for extremely critical
power applications.
 2010 Microchip Technology Inc.
DS39951C-page 119
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 120
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
10.0
Note:
I/O PORTS
When a peripheral is enabled and the peripheral is
actively driving an associated pin, the use of the pin as
a general purpose output pin is disabled. The I/O pin
may be read, but the output driver for the parallel port
bit will be disabled. If a peripheral is enabled, but the
peripheral is not actively driving a pin, that pin may be
driven by a port.
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 12. “I/O Ports with Peripheral
Pin Select (PPS)” (DS39711).
All of the device pins (except VDD, VSS, MCLR and
OSCI/CLKI) are shared between the peripherals and
the parallel I/O ports. All I/O input ports feature Schmitt
Trigger inputs for improved noise immunity.
10.1
Parallel I/O (PIO) Ports
A parallel I/O port that shares a pin with a peripheral is, in
general, subservient to the peripheral. The peripheral’s
output buffer data and control signals are provided to a
pair of multiplexers. The multiplexers select whether the
peripheral or the associated port has ownership of the
output data and control signals of the I/O pin. The logic
also prevents “loop through”, in which a port’s digital output can drive the input of a peripheral that shares the
same pin. Figure 10-1 shows how ports are shared with
other peripherals and the associated I/O pin to which
they are connected.
FIGURE 10-1:
All port pins have three registers directly associated
with their operation as digital I/Os. The Data Direction
register (TRIS) determines whether the pin is an input
or an output. If the data direction bit is a ‘1’, then the pin
is an input. All port pins are defined as inputs after a
Reset. Reads from the Output Latch register (LAT),
read the latch. Writes to the Output Latch register, write
the latch. Reads from the port (PORT), read the port
pins, while writes to the port pins, write the latch.
Any bit and its associated data and control registers
that are not valid for a particular device will be
disabled. That means the corresponding LAT and
TRIS registers, and the port pin will read as zeros.
When a pin is shared with another peripheral or function that is defined as an input only, it is regarded as a
dedicated port because there is no other competing
source of outputs.
BLOCK DIAGRAM OF A TYPICAL SHARED PORT STRUCTURE
Peripheral Module
Output Multiplexers
Peripheral Input Data
Peripheral Module Enable
I/O
Peripheral Output Enable
1
Peripheral Output Data
0
PIO Module
Read TRIS
Data Bus
WR TRIS
1
Output Enable
Output Data
0
D
Q
I/O Pin
CK
TRIS Latch
D
WR LAT +
WR PORT
Q
CK
Data Latch
Read LAT
Input Data
Read PORT
 2010 Microchip Technology Inc.
DS39951C-page 121
PIC24FJ64GA104 FAMILY
10.1.1
OPEN-DRAIN CONFIGURATION
In addition to the PORT, LAT and TRIS registers for
data control, each port pin can also be individually
configured for either digital or open-drain output. This is
controlled by the Open-Drain Control register, ODCx,
associated with each port. Setting any of the bits configures the corresponding pin to act as an open-drain
output.
The open-drain feature allows the generation of
outputs higher than VDD (e.g., 5V) on any desired
digital only pins by using external pull-up resistors. The
maximum open-drain voltage allowed is the same as
the maximum VIH specification.
10.2
Configuring Analog Port Pins
The AD1PCFGL and TRIS registers control the operation of the A/D port pins. Setting a port pin as an analog
input also requires that the corresponding TRIS bit be
set. If the TRIS bit is cleared (output), the digital output
level (VOH or VOL) will be converted.
10.2.2
ANALOG INPUT PINS AND
VOLTAGE CONSIDERATIONS
The voltage tolerance of pins used as device inputs is
dependent on the pin’s input function. Pins that are
used as digital only inputs are able to handle DC
voltages up to 5.5V, a level typical for digital logic
circuits. In contrast, pins that also have analog input
functions of any kind can only tolerate voltages up to
VDD. Voltage excursions beyond VDD on these pins
should be avoided.
Table 10-1 summarizes the input voltage capabilities.
Refer to Section 28.0 “Electrical Characteristics” for
more details.
TABLE 10-1:
Port or Pin
PORTA<4:0>
PORTB<4:0>
Pins configured as digital inputs will not convert an
analog input. Analog levels on any pin that is defined as
a digital input (including the ANx pins) may cause the
input buffer to consume current that exceeds the
device specifications.
PORTA<10:7>(1)
I/O PORT WRITE/READ TIMING
Tolerated
Input
Description
VDD
Only VDD input levels
tolerated.
5.5V
Tolerates input levels
above VDD, useful for
most standard logic.
PORTB<15:12>
When reading the PORT register, all pins configured as
analog input channels will read as cleared (a low level).
10.2.1
INPUT VOLTAGE TOLERANCE
PORTC<3:0>(1)
PORTB<11:7>
PORTB<6:5>
PORTC<9:4>(1)
Note 1:
Not available on 28-pin devices.
One instruction cycle is required between a port
direction change or port write operation and a read
operation of the same port. Typically, this instruction
would be a NOP (Example 10-1).
EXAMPLE 10-1:
MOV
MOV
NOP
BTSS
0xFF00, W0
W0, TRISB
PORTB, #13
DS39951C-page 122
PORT WRITE/READ EXAMPLE
;
;
;
;
Configure PORTB<15:8> as inputs
and PORTB<7:0> as outputs
Delay 1 cycle
Next Instruction
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
10.3
Input Change Notification
The input change notification function of the I/O ports
allows the PIC24FJ64GA104 family of devices to generate interrupt requests to the processor in response to
a Change-of-State (COS) on selected input pins. This
feature is capable of detecting input Change-of-States
even in Sleep mode, when the clocks are disabled.
Depending on the device pin count, there are up to
31 external inputs that may be selected (enabled) for
generating an interrupt request on a Change-of-State.
Registers, CNEN1 and CNEN2, contain the interrupt
enable control bits for each of the CN input pins. Setting
any of these bits enables a CN interrupt for the
corresponding pins.
Each CN pin has a weak pull-up connected to it. The
pull-up acts as a current source that is connected to the
pin. This eliminates the need for external resistors
when push button or keypad devices are connected.
The pull-ups are separately enabled using the CNPU1
and CNPU2 registers (for pull-ups). Each CN pin has
individual control bits for its pull-up. Setting a control bit
enables the weak pull-up for the corresponding pin.
When the internal pull-up is selected, the pin pulls up to
VDD – 0.7V (typical). Make sure that there is no external
pull-up source when the internal pull-ups are enabled,
as the voltage difference can cause a current path.
Note:
10.4
Pull-ups on change notification pins
should always be disabled whenever the
port pin is configured as a digital output.
Peripheral Pin Select (PPS)
A major challenge in general purpose devices is providing the largest possible set of peripheral features while
minimizing the conflict of features on I/O pins. In an
application that needs to use more than one peripheral
multiplexed on a single pin, inconvenient work arounds
in application code or a complete redesign may be the
only option.
The Peripheral Pin Select feature provides an alternative
to these choices by enabling the user’s peripheral set
selection and their placement on a wide range of I/O
pins. By increasing the pinout options available on a particular device, users can better tailor the microcontroller
to their entire application, rather than trimming the
application to fit the device.
The Peripheral Pin Select feature operates over a fixed
subset of digital I/O pins. Users may independently
map the input and/or output of any one of many digital
peripherals to any one of these I/O pins. Peripheral Pin
Select is performed in software and generally does not
require the device to be reprogrammed. Hardware
safeguards are included that prevent accidental or
spurious changes to the peripheral mapping once it has
been established.
 2010 Microchip Technology Inc.
10.4.1
AVAILABLE PINS
The Peripheral Pin Select feature is used with a range
of up to 25 pins, depending on the particular device and
its pin count. Pins that support the Peripheral Pin
Select feature include the designation “RPn” in their full
pin designation, where “n” is the remappable pin
number.
See Table 1-2 for a summary of pinout options in each
package offering.
10.4.2
AVAILABLE PERIPHERALS
The peripherals managed by the Peripheral Pin Select
are all digital only peripherals. These include general
serial communications (UART and SPI), general
purpose timer clock inputs, timer related peripherals
(input capture and output compare) and external
interrupt inputs. Also included are the outputs of the
comparator module, since these are discrete digital
signals.
Peripheral Pin Select is not available for I2C™ change
notification inputs, RTCC alarm outputs or peripherals
with analog inputs.
A key difference between pin select and non pin select
peripherals is that pin select peripherals are not associated with a default I/O pin. The peripheral must
always be assigned to a specific I/O pin before it can be
used. In contrast, non pin select peripherals are always
available on a default pin, assuming that the peripheral
is active and not conflicting with another peripheral.
10.4.2.1
Peripheral Pin Select Function
Priority
Pin-selectable peripheral outputs (for example, OC and
UART transmit) take priority over any general purpose
digital functions permanently tied to that pin, such as
PMP and port I/O. Specialized digital outputs, such as
USB functionality, take priority over PPS outputs on the
same pin. The pin diagrams at the beginning of this
data sheet list peripheral outputs in order of priority.
Refer to them for priority concerns on a particular pin.
Unlike devices with fixed peripherals, pin-selectable
peripheral inputs never take ownership of a pin. The
pin’s output buffer is controlled by the pin’s TRIS bit
setting, or by a fixed peripheral on the pin. If the pin is
configured in Digital mode, then the PPS input will
operate correctly, reading the input. If an analog function is enabled on the same pin, the pin-selectable
input will be disabled.
DS39951C-page 123
PIC24FJ64GA104 FAMILY
10.4.3
CONTROLLING PERIPHERAL PIN
SELECT
Peripheral Pin Select features are controlled through
two sets of Special Function Registers: one to map
peripheral inputs and one to map outputs. Because
they are separately controlled, a particular peripheral’s
input and output (if the peripheral has both) can be
placed on any selectable function pin without
constraint.
The
association
of
a
peripheral
to
a
peripheral-selectable pin is handled in two different
ways, depending on if an input or an output is being
mapped.
TABLE 10-2:
10.4.3.1
Input Mapping
The inputs of the Peripheral Pin Select options are
mapped on the basis of the peripheral; that is, a control
register associated with a peripheral dictates the pin it
will be mapped to. The RPINRx registers are used to
configure peripheral input mapping (see Register 10-1
through Register 10-14). Each register contains up to
two sets of 5-bit fields, with each set associated with
one of the pin-selectable peripherals. Programming a
given peripheral’s bit field with an appropriate 6-bit
value maps the RPn pin with that value to that
peripheral. For any given device, the valid range of
values for any of the bit fields corresponds to the
maximum number of Peripheral Pin Select options
supported by the device.
SELECTABLE INPUT SOURCES (MAPS INPUT TO FUNCTION)(1)
Function Name
Register
Function Mapping
Bits
External Interrupt 1
INT1
RPINR0
INT1R<5:0>
External Interrupt 2
Input Capture 1
INT2
IC1
RPINR1
RPINR7
INT2R<5:0>
IC1R<5:0>
Input Capture 2
Input Capture 3
IC2
IC3
RPINR7
RPINR8
IC2R<5:0>
IC3R<5:0>
Input Capture 4
Input Capture 5
IC4
IC5
RPINR8
RPINR9
IC4R<5:0>
IC5R<5:0>
OCFA
OCFB
RPINR11
RPINR11
OCFAR<5:0>
OCFBR<5:0>
SPI1 Clock Input
SPI1 Data Input
SCK1IN
SDI1
RPINR20
RPINR20
SCK1R<5:0>
SDI1R<5:0>
SPI1 Slave Select Input
SPI2 Clock Input
SS1IN
SCK2IN
RPINR21
RPINR22
SS1R<5:0>
SCK2R<5:0>
SPI2 Data Input
SPI2 Slave Select Input
SDI2
SS2IN
RPINR22
RPINR23
SDI2R<5:0>
SS2R<5:0>
Timer2 External Clock
Timer3 External Clock
T2CK
T3CK
RPINR3
RPINR3
T2CKR<5:0>
T3CKR<5:0>
Timer4 External Clock
Timer5 External Clock
T4CK
T5CK
RPINR4
RPINR4
T4CKR<5:0>
T5CKR<5:0>
UART1 Clear To Send
U1CTS
RPINR18
U1CTSR<5:0>
U1RX
RPINR18
U1RXR<5:0>
U2CTS
U2RX
RPINR19
RPINR19
U2CTSR<5:0>
U2RXR<5:0>
Input Name
Output Compare Fault A
Output Compare Fault B
UART1 Receive
UART2 Clear To Send
UART2 Receive
Note 1:
Unless otherwise noted, all inputs use the Schmitt Trigger input buffers.
DS39951C-page 124
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
10.4.3.2
Output Mapping
the bit field corresponds to one of the peripherals and
that peripheral’s output is mapped to the pin (see
Table 10-3).
In contrast to inputs, the outputs of the Peripheral Pin
Select options are mapped on the basis of the pin. In
this case, a control register associated with a particular
pin dictates the peripheral output to be mapped. The
RPORx registers are used to control output mapping.
Each register contains up to two 5-bit fields, with each
field being associated with one RPn pin (see
Register 10-15 through Register 10-27). The value of
TABLE 10-3:
Because of the mapping technique, the list of peripherals
for output mapping also includes a null value of ‘000000’.
This permits any given pin to remain disconnected from
the output of any of the pin-selectable peripherals.
SELECTABLE OUTPUT SOURCES (MAPS FUNCTION TO OUTPUT)
Output Function Number(1)
Function
0
NULL(2)
Null
1
C1OUT
Comparator 1 Output
2
C2OUT
Comparator 2 Output
3
U1TX
UART1 Transmit
4
U1RTS
5
U2TX
6
Note 1:
2:
3:
(3)
U2RTS
(3)
Output Name
UART1 Request To Send
UART2 Transmit
UART2 Request To Send
7
SDO1
SPI1 Data Output
8
SCK1OUT
SPI1 Clock Output
9
SS1OUT
SPI1 Slave Select Output
10
SDO2
SPI2 Data Output
11
SCK2OUT
SPI2 Clock Output
12
SS2OUT
SPI2 Slave Select Output
18
OC1
Output Compare 1
19
OC2
Output Compare 2
20
OC3
Output Compare 3
21
OC4
Output Compare 4
22
OC5
Output Compare 5
23-28
(unused)
NC
29
CTPLS
CTMU Output Pulse
30
C3OUT
Comparator 3 Output
31
(unused)
NC
Setting the RPORx register with the listed value assigns that output function to the associated RPn pin.
The NULL function is assigned to all RPn outputs at device Reset and disables the RPn output function.
IrDA® BCLK functionality uses this output.
 2010 Microchip Technology Inc.
DS39951C-page 125
PIC24FJ64GA104 FAMILY
10.4.3.3
Mapping Limitations
The control schema of the Peripheral Pin Select is
extremely flexible. Other than systematic blocks that
prevent signal contention caused by two physical pins
being configured as the same functional input, or two
functional outputs configured as the same pin, there
are no hardware enforced lock outs. The flexibility
extends to the point of allowing a single input to drive
multiple peripherals or a single functional output to
drive multiple output pins.
10.4.3.4
PPS Mapping Exceptions for
PIC24FJ64GA1 Family Devices
Although the PPS registers allow for up to 32 remappable
pins, a maximum of 26 pins are implemented in 44-pin
devices (RP0 through RP25). In 28-pin devices, none of
the remappable pins above RP15 are implemented.
10.4.4
CONTROLLING CONFIGURATION
CHANGES
Because peripheral remapping can be changed during
run time, some restrictions on peripheral remapping
are needed to prevent accidental configuration
changes. PIC24F devices include three features to
prevent alterations to the peripheral map:
• Control register lock sequence
• Continuous state monitoring
• Configuration bit remapping lock
10.4.4.1
Control Register Lock
Under normal operation, writes to the RPINRx and
RPORx registers are not allowed. Attempted writes will
appear to execute normally, but the contents of the
registers will remain unchanged. To change these registers, they must be unlocked in hardware. The register
lock is controlled by the IOLOCK bit (OSCCON<6>).
Setting IOLOCK prevents writes to the control
registers; clearing IOLOCK allows writes.
Unlike the similar sequence with the oscillator’s LOCK
bit, IOLOCK remains in one state until changed. This
allows all of the Peripheral Pin Selects to be configured
with a single unlock sequence, followed by an update
to all control registers, then locked with a second lock
sequence.
10.4.4.2
Continuous State Monitoring
In addition to being protected from direct writes, the
contents of the RPINRx and RPORx registers are
constantly monitored in hardware by shadow registers.
If an unexpected change in any of the registers occurs
(such as cell disturbances caused by ESD or other
external events), a Configuration Mismatch Reset will
be triggered.
10.4.4.3
Configuration Bit Pin Select Lock
As an additional level of safety, the device can be
configured to prevent more than one write session to
the RPINRx and RPORx registers. The IOL1WAY
(CW2<4>) Configuration bit blocks the IOLOCK bit
from being cleared after it has been set once. If
IOLOCK remains set, the register unlock procedure will
not execute and the Peripheral Pin Select Control
registers cannot be written to. The only way to clear the
bit and re-enable peripheral remapping is to perform a
device Reset.
In the default (unprogrammed) state, IOL1WAY is set,
restricting users to one write session. Programming
IOL1WAY allows users unlimited access (with the
proper use of the unlock sequence) to the Peripheral
Pin Select registers.
To set or clear IOLOCK, a specific command sequence
must be executed:
1.
2.
3.
Write 46h to OSCCON<7:0>.
Write 57h to OSCCON<7:0>.
Clear (or set) IOLOCK as a single operation.
DS39951C-page 126
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
10.4.5
CONSIDERATIONS FOR
PERIPHERAL PIN SELECTION
The ability to control Peripheral Pin Selection introduces several considerations into application design
that could be overlooked. This is particularly true for
several common peripherals that are available only as
remappable peripherals.
The main consideration is that the Peripheral Pin
Selects are not available on default pins in the device’s
default (Reset) state. Since all RPINRx registers reset
to ‘11111’ and all RPORx registers reset to ‘00000’, all
Peripheral Pin Select inputs are tied to VSS and all
Peripheral Pin Select outputs are disconnected.
Note:
RP31 does not have to exist on a device
for the registers to be reset to it, or for
peripheral pin outputs to be tied to it.
This situation requires the user to initialize the device
with the proper peripheral configuration before any
other application code is executed. Since the IOLOCK
bit resets in the unlocked state, it is not necessary to
execute the unlock sequence after the device has
come out of Reset. For application safety, however, it is
best to set IOLOCK and lock the configuration after
writing to the control registers.
Because the unlock sequence is timing-critical, it must
be executed as an assembly language routine in the
same manner as changes to the oscillator configuration. If the bulk of the application is written in C or
another high-level language, the unlock sequence
should be performed by writing in-line assembly.
The assignment of a peripheral to a particular pin does
not automatically perform any other configuration of the
pin’s I/O circuitry. In theory, this means adding a
pin-selectable output to a pin may mean inadvertently
driving an existing peripheral input when the output is
driven. Users must be familiar with the behavior of
other fixed peripherals that share a remappable pin and
know when to enable or disable them. To be safe, fixed
digital peripherals that share the same pin should be
disabled when not in use.
Along these lines, configuring a remappable pin for a
specific peripheral does not automatically turn that
feature on. The peripheral must be specifically
configured for operation and enabled, as if it were tied to
a fixed pin. Where this happens in the application code
(immediately following device Reset and peripheral
configuration or inside the main application routine)
depends on the peripheral and its use in the application.
A final consideration is that Peripheral Pin Select functions neither override analog inputs, nor reconfigure
pins with analog functions for digital I/O. If a pin is
configured as an analog input on device Reset, it must
be explicitly reconfigured as digital I/O when used with
a Peripheral Pin Select.
Example 10-2 shows a configuration for bidirectional
communication with flow control using UART1. The
following input and output functions are used:
• Input Functions: U1RX, U1CTS
• Output Functions: U1TX, U1RTS
Choosing the configuration requires the review of all
Peripheral Pin Selects and their pin assignments,
especially those that will not be used in the application.
In all cases, unused pin-selectable peripherals should
be disabled completely. Unused peripherals should
have their inputs assigned to an unused RPn pin
function. I/O pins with unused RPn functions should be
configured with the null peripheral output.
 2010 Microchip Technology Inc.
DS39951C-page 127
PIC24FJ64GA104 FAMILY
EXAMPLE 10-2:
;unlock
push
push
push
mov
mov
mov
mov.b
mov.b
bclr
CONFIGURING UART1 INPUT AND OUTPUT FUNCTIONS IN ASSEMBLY CODE
registers
w1;
w2;
w3;
#OSCCON, w1;
#0x46, w2;
#0x57, w3;
w2, [w1];
w3, [w1];
OSCCON, #6;
; Configure Input Functions (Table10-2)
; Assign U1CTS To Pin RP1, U1RX To Pin RP0
mov
#0x0100, w1;
mov
w1,RPINR18;
; Configure Output Functions (Table 10-3)
; Assign U1RTS To Pin RP3, U1TX To Pin RP2
mov
#0x0403, w1;
mov
w1, RPOR1;
;lock
mov
mov
mov
mov.b
mov.b
bset
pop
pop
pop
registers
#OSCCON, w1;
#0x46, w2;
#0x57, w3;
w2, [w1];
w3, [w1];
OSCCON, #6;
w3;
w2;
w1;
EXAMPLE 10-3:
CONFIGURING UART1 INPUT AND OUTPUT FUNCTIONS IN C
//unlock registers
__builtin_write_OSCCONL(OSCCON & 0xBF);
// Configure Input Functions (Table 9-1)
// Assign U1RX To Pin RP0
RPINR18bits.U1RXR = 0;
// Assign U1CTS To Pin RP1
RPINR18bits.U1CTSR = 1;
// Configure Output Functions (Table 9-2)
// Assign U1TX To Pin RP2
RPOR1bits.RP2R = 3;
// Assign U1RTS To Pin RP3
RPOR1bits.RP3R = 4;
//lock registers
__builtin_write_OSCCONL(OSCCON | 0x40);
DS39951C-page 128
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
10.4.6
PERIPHERAL PIN SELECT
REGISTERS
Note:
The PIC24FJ64GA104 family of devices implements a
total of 27 registers for remappable peripheral
configuration:
• Input Remappable Peripheral Registers (14)
• Output Remappable Peripheral Registers (13)
REGISTER 10-1:
Input and output register values can only be
changed if IOLOCK (OSCCON<6>) = 0.
See Section 10.4.4.1 “Control Register
Lock” for a specific command sequence.
RPINR0: PERIPHERAL PIN SELECT INPUT REGISTER 0
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
INT1R4
INT1R3
INT1R2
INT1R1
INT1R0
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
INT1R<4:0>: Assign External Interrupt 1 (INT1) to Corresponding RPn or RPIn Pin bits
bit 7-0
Unimplemented: Read as ‘0’
REGISTER 10-2:
RPINR1: PERIPHERAL PIN SELECT INPUT REGISTER 1
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
INT2R4
INT2R3
INT2R2
INT2R1
INT2R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-5
Unimplemented: Read as ‘0’
bit 4-0
INT2R<4:0>: Assign External Interrupt 2 (INT2) to Corresponding RPn or RPIn pin bits
 2010 Microchip Technology Inc.
DS39951C-page 129
PIC24FJ64GA104 FAMILY
REGISTER 10-3:
RPINR3: PERIPHERAL PIN SELECT INPUT REGISTER 3
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
T3CKR4
T3CKR3
T3CKR2
T3CKR1
T3CKR0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
T2CKR4
T2CKR3
T2CKR2
T2CKR1
T2CKR0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
T3CKR<4:0>: Assign Timer3 External Clock (T3CK) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
T2CKR<4:0>: Assign Timer2 External Clock (T2CK) to Corresponding RPn or RPIn Pin bits
REGISTER 10-4:
RPINR4: PERIPHERAL PIN SELECT INPUT REGISTER 4
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
T5CKR4
T5CKR3
T5CKR2
T5CKR1
T5CKR0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
T4CKR4
T4CKR3
T4CKR2
T4CKR1
T4CKR0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
T5CKR<4:0>: Assign Timer5 External Clock (T5CK) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
T4CKR<4:0>: Assign Timer4 External Clock (T4CK) to Corresponding RPn or RPIn Pin bits
DS39951C-page 130
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 10-5:
RPINR7: PERIPHERAL PIN SELECT INPUT REGISTER 7
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
IC2R4
IC2R3
IC2R2
IC2R1
IC2R0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
IC1R4
IC1R3
IC1R2
IC1R1
IC1R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
IC2R<4:0>: Assign Input Capture 2 (IC2) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
IC1R<4:0>: Assign Input Capture 1 (IC1) to Corresponding RPn or RPIn Pin bits
REGISTER 10-6:
RPINR8: PERIPHERAL PIN SELECT INPUT REGISTER 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
IC4R4
IC4R3
IC4R2
IC4R1
IC4R0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
IC3R4
IC3R3
IC3R2
IC3R1
IC3R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
IC4R<4:0>: Assign Input Capture 4 (IC4) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
IC3R<4:0>: Assign Input Capture 3 (IC3) to Corresponding RPn or RPIn Pin bits
 2010 Microchip Technology Inc.
DS39951C-page 131
PIC24FJ64GA104 FAMILY
REGISTER 10-7:
RPINR9: PERIPHERAL PIN SELECT INPUT REGISTER 9
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
IC5R4
IC5R3
IC5R2
IC5R1
IC5R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-5
Unimplemented: Read as ‘0’
bit 4-0
IC5R<4:0>: Assign Input Capture 5 (IC5) to Corresponding RPn or RPIn Pin bits
REGISTER 10-8:
RPINR11: PERIPHERAL PIN SELECT INPUT REGISTER 11
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
OCFBR4
OCFBR3
OCFBR2
OCFBR1
OCFBR0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
OCFAR4
OCFAR3
OCFAR2
OCFAR1
OCFAR0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
OCFBR<4:0>: Assign Output Compare Fault B (OCFB) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
OCFAR<4:0>: Assign Output Compare Fault A (OCFA) to Corresponding RPn or RPIn Pin bits
DS39951C-page 132
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 10-9:
RPINR18: PERIPHERAL PIN SELECT INPUT REGISTER 18
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
U1CTSR4
U1CTSR3
U1CTSR2
U1CTSR1
U1CTSR0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
U1RXR4
U1RXR3
U1RXR2
U1RXR1
U1RXR0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
U1CTSR<4:0>: Assign UART1 Clear to Send (U1CTS) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
U1RXR<4:0>: Assign UART1 Receive (U1RX) to Corresponding RPn or RPIn Pin bits
REGISTER 10-10: RPINR19: PERIPHERAL PIN SELECT INPUT REGISTER 19
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
U2CTSR4
U2CTSR3
U2CTSR2
U2CTSR1
U2CTSR0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
U2RXR4
U2RXR3
U2RXR2
U2RXR1
U2RXR0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
U2CTSR<4:0>: Assign UART2 Clear to Send (U2CTS) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
U2RXR<4:0>: Assign UART2 Receive (U2RX) to Corresponding RPn or RPIn Pin bits
 2010 Microchip Technology Inc.
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PIC24FJ64GA104 FAMILY
REGISTER 10-11: RPINR20: PERIPHERAL PIN SELECT INPUT REGISTER 20
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
SCK1R4
SCK1R3
SCK1R2
SCK1R1
SCK1R0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
SDI1R4
SDI1R3
SDI1R2
SDI1R1
SDI1R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
SCK1R<4:0>: Assign SPI1 Clock Input (SCK1IN) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
SDI1R<4:0>: Assign SPI1 Data Input (SDI1) to Corresponding RPn or RPIn Pin bits
REGISTER 10-12: RPINR21: PERIPHERAL PIN SELECT INPUT REGISTER 21
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
SS1R4
SS1R3
SS1R2
SS1R1
SS1R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-5
Unimplemented: Read as ‘0’
bit 4-0
SS1R<4:0>: Assign SPI1 Slave Select Input (SS1IN) to Corresponding RPn or RPIn Pin bits
DS39951C-page 134
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 10-13: RPINR22: PERIPHERAL PIN SELECT INPUT REGISTER 22
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
SCK2R4
SCK2R3
SCK2R2
SCK2R1
SCK2R0
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
SDI2R4
SDI2R3
SDI2R2
SDI2R1
SDI2R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
SCK2R<4:0>: Assign SPI2 Clock Input (SCK2IN) to Corresponding RPn or RPIn Pin bits
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
SDI2R<4:0>: Assign SPI2 Data Input (SDI2) to Corresponding RPn or RPIn Pin bits
REGISTER 10-14: RPINR23: PERIPHERAL PIN SELECT INPUT REGISTER 23
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
SS2R4
SS2R3
SS2R2
SS2R1
SS2R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-5
Unimplemented: Read as ‘0’
bit 4-0
SS2R<4:0>: Assign SPI2 Slave Select Input (SS2IN) to Corresponding RPn or RPIn Pin bits
 2010 Microchip Technology Inc.
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PIC24FJ64GA104 FAMILY
REGISTER 10-15: RPOR0: PERIPHERAL PIN SELECT OUTPUT REGISTER 0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP1R4
RP1R3
RP1R2
RP1R1
RP1R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP0R4
RP0R3
RP0R2
RP0R1
RP0R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP1R<4:0<: RP1 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP1 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP0R<4:0>: RP0 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP0 (see Table 10-3 for peripheral function numbers).
REGISTER 10-16: RPOR1: PERIPHERAL PIN SELECT OUTPUT REGISTER 1
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP3R4
RP3R3
RP3R2
RP3R1
RP3R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP2R4
RP2R3
RP2R2
RP2R1
RP2R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP3R<4:0>: RP3 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP3 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP2R<4:0>: RP2 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP2 (see Table 10-3 for peripheral function numbers).
DS39951C-page 136
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 10-17: RPOR2: PERIPHERAL PIN SELECT OUTPUT REGISTER 2
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP5R4
RP5R3
RP5R2
RP5R1
RP5R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP4R4
RP4R3
RP4R2
RP4R1
RP4R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP5R<4:0>: RP5 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP5 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP4R<4:0>: RP4 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP4 (see Table 10-3 for peripheral function numbers).
REGISTER 10-18: RPOR3: PERIPHERAL PIN SELECT OUTPUT REGISTER 3
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP7R4
RP7R3
RP7R2
RP7R1
RP7R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP6R4
RP6R3
RP6R2
RP6R1
RP6R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP7R<4:0>: RP7 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP7 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP6R<4:0>: RP6 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP6 (see Table 10-3 for peripheral function numbers).
 2010 Microchip Technology Inc.
DS39951C-page 137
PIC24FJ64GA104 FAMILY
REGISTER 10-19: RPOR4: PERIPHERAL PIN SELECT OUTPUT REGISTER 4
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP9R4
RP9R3
RP9R2
RP9R1
RP9R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP8R4
RP8R3
RP8R2
RP8R1
RP8R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP9R<4:0>: RP9 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP9 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP8R<4:0>: RP8 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP8 (see Table 10-3 for peripheral function numbers).
REGISTER 10-20: RPOR5: PERIPHERAL PIN SELECT OUTPUT REGISTER 5
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP11R4
RP11R3
RP11R2
RP11R1
RP11R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP10R4
RP10R3
RP10R2
RP10R1
RP10R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP11R<4:0>: RP11 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP11 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP10R<4:0>: RP10 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP10 (see Table 10-3 for peripheral function numbers).
DS39951C-page 138
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 10-21: RPOR6: PERIPHERAL PIN SELECT OUTPUT REGISTER 6
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP13R4
RP13R3
RP13R2
RP13R1
RP13R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP12R4
RP12R3
RP12R2
RP12R1
RP12R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP13R<4:0>: RP13 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP13 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP12R<4:0>: RP12 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP12 (see Table 10-3 for peripheral function numbers).
REGISTER 10-22: RPOR7: PERIPHERAL PIN SELECT OUTPUT REGISTER 7
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP15R4
RP15R3
RP15R2
RP15R1
RP15R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP14R4
RP14R3
RP14R2
RP14R1
RP14R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP15R<4:0>: RP15 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP0 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP14R<4:0>: RP14 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP14 (see Table 10-3 for peripheral function numbers).
 2010 Microchip Technology Inc.
DS39951C-page 139
PIC24FJ64GA104 FAMILY
REGISTER 10-23: RPOR8: PERIPHERAL PIN SELECT OUTPUT REGISTER 8(1)
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP17R4
RP17R3
RP17R2
RP17R1
RP17R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP16R4
RP16R3
RP16R2
RP16R1
RP16R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP17R<4:0>: RP17 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP17 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP16R<4:0>: RP16 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP16 (see Table 10-3 for peripheral function numbers).
Note 1:
This register is unimplemented in 28-pin devices; all bits read as ‘0’.
REGISTER 10-24: RPOR9: PERIPHERAL PIN SELECT OUTPUT REGISTER 9(1)
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP19R4
RP19R3
RP19R2
RP19R1
RP19R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP18R4
RP18R3
RP18R2
RP18R1
RP18R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP19R<4:0>: RP19 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP19 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP18R<4:0>: RP18 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP18 (see Table 10-3 for peripheral function numbers).
Note 1:
This register is unimplemented in 28-pin devices; all bits read as ‘0’.
DS39951C-page 140
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 10-25: RPOR10: PERIPHERAL PIN SELECT OUTPUT REGISTER 10(1)
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP21R4
RP21R3
RP21R2
RP21R1
RP21R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP20R4
RP20R3
RP20R2
RP20R1
RP20R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP21R<4:0>: RP21 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP21 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP20R<4:0>: RP20 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP20 (see Table 10-3 for peripheral function numbers).
Note 1:
This register is unimplemented in 28-pin devices; all bits read as ‘0’.
REGISTER 10-26: RPOR11: PERIPHERAL PIN SELECT OUTPUT REGISTER 11(1)
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP23R4
RP23R3
RP23R2
RP23R1
RP23R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP22R4
RP22R3
RP22R2
RP22R1
RP22R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP23R<4:0>: RP23 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP23 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP22R<4:0>: RP22 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP22 (see Table 10-3 for peripheral function numbers).
Note 1:
This register is unimplemented in 28-pin devices; all bits read as ‘0’.
 2010 Microchip Technology Inc.
DS39951C-page 141
PIC24FJ64GA104 FAMILY
REGISTER 10-27: RPOR12: PERIPHERAL PIN SELECT OUTPUT REGISTER 12(1)
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP25R4
RP25R3
RP25R2
RP25R1
RP25R0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
RP24R4
RP24R3
RP24R2
RP24R1
RP24R0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
RP25R<5:0>: RP25 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP25 (see Table 10-3 for peripheral function numbers).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RP24R<5:0>: RP24 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP24 (see Table 10-3 for peripheral function numbers).
Note 1:
This register is unimplemented in 28-pin devices; all bits read as ‘0’.
DS39951C-page 142
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
11.0
Note:
TIMER1
Figure 11-1 presents a block diagram of the 16-bit timer
module.
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 14. “Timers” (DS39704).
To configure Timer1 for operation:
1.
2.
3.
The Timer1 module is a 16-bit timer which can serve as
the time counter for the Real-Time Clock (RTC) or
operate as a free-running, interval timer/counter.
Timer1 can operate in three modes:
4.
5.
• 16-Bit Timer
• 16-Bit Synchronous Counter
• 16-Bit Asynchronous Counter
6.
Set the TON bit (= 1).
Select the timer prescaler ratio using the
TCKPS<1:0> bits.
Set the Clock and Gating modes using the TCS
and TGATE bits.
Set or clear the TSYNC bit to configure
synchronous or asynchronous operation.
Load the timer period value into the PR1
register.
If interrupts are required, set the interrupt enable
bit, T1IE. Use the priority bits, T1IP<2:0>, to set
the interrupt priority.
Timer1 also supports these features:
• Timer Gate Operation
• Selectable Prescaler Settings
• Timer Operation during CPU Idle and Sleep
modes
• Interrupt on 16-Bit Period Register Match or
Falling Edge of External Gate Signal
FIGURE 11-1:
16-BIT TIMER1 MODULE BLOCK DIAGRAM
TCKPS<1:0>
SOSCO/
T1CK
1x
SOSCEN
SOSCI
Gate
Sync
01
TCY
00
Prescaler
1, 8, 64, 256
TGATE
TCS
TGATE
Set T1IF
2
TON
1
Q
D
0
Q
CK
Reset
0
TMR1
1
Equal
Comparator
Sync
TSYNC
PR1
 2010 Microchip Technology Inc.
DS39951C-page 143
PIC24FJ64GA104 FAMILY
REGISTER 11-1:
T1CON: TIMER1 CONTROL REGISTER(1)
R/W-0
U-0
R/W-0
U-0
U-0
U-0
U-0
U-0
TON
—
TSIDL
—
—
—
—
—
bit 15
bit 8
U-0
R/W-0
R/W-0
R/W-0
U-0
R/W-0
R/W-0
U-0
—
TGATE
TCKPS1
TCKPS0
—
TSYNC
TCS
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
TON: Timer1 On bit
1 = Starts 16-bit Timer1
0 = Stops 16-bit Timer1
bit 14
Unimplemented: Read as ‘0’
bit 13
TSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-7
Unimplemented: Read as ‘0’
bit 6
TGATE: Timer1 Gated Time Accumulation Enable bit
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation enabled
0 = Gated time accumulation disabled
bit 5-4
TCKPS<1:0>: Timer1 Input Clock Prescale Select bits
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3
Unimplemented: Read as ‘0’
bit 2
TSYNC: Timer1 External Clock Input Synchronization Select bit
When TCS = 1:
1 = Synchronize external clock input
0 = Do not synchronize external clock input
When TCS = 0:
This bit is ignored.
bit 1
TCS: Timer1 Clock Source Select bit
1 = External clock from T1CK pin (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0
Unimplemented: Read as ‘0’
Note 1:
x = Bit is unknown
Changing the value of TxCON while the timer is running (TON = 1) causes the timer prescale counter to
reset and is not recommended.
DS39951C-page 144
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
12.0
Note:
TIMER2/3 AND TIMER4/5
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 14. “Timers” (DS39704).
The Timer2/3 and Timer4/5 modules are 32-bit timers,
which can also be configured as four independent 16-bit
timers with selectable operating modes.
To configure Timer2/3 or Timer4/5 for 32-bit operation:
1.
2.
3.
4.
As 32-bit timers, Timer2/3 and Timer4/5 can each
operate in three modes:
• Two Independent 16-Bit Timers with All 16-Bit
Operating modes (except Asynchronous Counter
mode)
• Single 32-Bit Timer
• Single 32-Bit Synchronous Counter
5.
They also support these features:
•
•
•
•
•
Timer Gate Operation
Selectable Prescaler Settings
Timer Operation during Idle and Sleep modes
Interrupt on a 32-Bit Period Register Match
ADC Event Trigger (Timer4/5 only)
Individually, all four of the 16-bit timers can function as
synchronous timers or counters. They also offer the
features listed above, except for the ADC event trigger;
this is implemented only with Timer5. The operating
modes and enabled features are determined by setting
the appropriate bit(s) in the T2CON, T3CON, T4CON
and T5CON registers. T2CON and T4CON are shown
in generic form in Register 12-1; T3CON and T5CON
are shown in Register 12-2.
For 32-bit timer/counter operation, Timer2 and Timer4
are the least significant word; Timer3 and Timer4 are
the most significant word of the 32-bit timers.
Note:
For 32-bit operation, T3CON and T5CON
control bits are ignored. Only T2CON and
T4CON control bits are used for setup and
control. Timer2 and Timer4 clock and gate
inputs are utilized for the 32-bit timer
modules, but an interrupt is generated with
the Timer3 or Timer5 interrupt flags.
 2010 Microchip Technology Inc.
6.
Set the T32 bit (T2CON<3> or T4CON<3> = 1).
Select the prescaler ratio for Timer2 or Timer4
using the TCKPS<1:0> bits.
Set the Clock and Gating modes using the TCS
and TGATE bits. If TCS is set to an external
clock, RPINRx (TxCK) must be configured to an
available
RPn
pin.
See
Section
10.4 “Peripheral Pin Select (PPS)” for more
information.
Load the timer period value. PR3 (or PR5) will
contain the most significant word of the value
while PR2 (or PR4) contains the least significant
word.
If interrupts are required, set the interrupt enable
bit, T3IE or T5IE; use the priority bits, T3IP<2:0>
or T5IP<2:0>, to set the interrupt priority. Note
that while Timer2 or Timer4 controls the timer,
the interrupt appears as a Timer3 or Timer5
interrupt.
Set the TON bit (= 1).
The timer value, at any point, is stored in the register
pair, TMR3:TMR2 (or TMR5:TMR4). TMR3 (TMR5)
always contains the most significant word of the count,
while TMR2 (TMR4) contains the least significant word.
To configure any of the timers for individual 16-bit
operation:
1.
2.
3.
4.
5.
6.
Clear the T32 bit corresponding to that timer
(T2CON<3> for Timer2 and Timer3 or
T4CON<3> for Timer4 and Timer5).
Select the timer prescaler ratio using the
TCKPS<1:0> bits.
Set the Clock and Gating modes using the TCS
and TGATE bits. See Section 10.4 “Peripheral
Pin Select (PPS)” for more information.
Load the timer period value into the PRx register.
If interrupts are required, set the interrupt enable
bit, TxIE; use the priority bits, TxIP<2:0>, to set
the interrupt priority.
Set the TON bit (TxCON<15> = 1).
DS39951C-page 145
PIC24FJ64GA104 FAMILY
FIGURE 12-1:
TIMER2/3 AND TIMER4/5 (32-BIT) BLOCK DIAGRAM
TCKPS<1:0>
2
TON
T2CK
(T4CK)
1x
Gate
Sync
01
TCY
00
Prescaler
1, 8, 64, 256
TGATE(2)
TGATE
TCS(2)
Q
1
Set T3IF (T5IF)
Q
0
PR3
(PR5)
ADC Event Trigger(3)
Equal
D
CK
PR2
(PR4)
Comparator
MSB
LSB
TMR3
(TMR5)
Reset
TMR2
(TMR4)
Sync
16
Read TMR2 (TMR4)
(1)
Write TMR2 (TMR4)(1)
16
TMR3HLD
(TMR5HLD)
16
Data Bus<15:0>
Note 1:
2:
3:
The 32-Bit Timer Configuration bit, T32, must be set for 32-bit timer/counter operation. All control bits are
respective to the T2CON and T4CON registers.
The timer clock input must be assigned to an available RPn pin before use. Please see Section 10.4 “Peripheral
Pin Select (PPS)” for more information.
The ADC event trigger is available only on Timer 2/3 in 32-bit mode and Timer 3 in 16-bit mode.
DS39951C-page 146
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
FIGURE 12-2:
TIMER2 AND TIMER4 (16-BIT SYNCHRONOUS) BLOCK DIAGRAM
TON
T2CK
(T4CK)
TCKPS<1:0>
2
1x
Gate
Sync
Prescaler
1, 8, 64, 256
01
00
TGATE
TCS(1)
TCY
1
Set T2IF (T4IF)
0
Reset
Equal
Q
D
Q
CK
TMR2 (TMR4)
TGATE(1)
Sync
Comparator
PR2 (PR4)
Note 1:
The timer clock input must be assigned to an available RPn pin before use. Please see Section 10.4 “Peripheral
Pin Select (PPS)” for more information.
FIGURE 12-3:
TIMER3 AND TIMER5 (16-BIT ASYNCHRONOUS) BLOCK DIAGRAM
T3CK
(T5CK)
Sync
1x
TON
TCKPS<1:0>
2
Prescaler
1, 8, 64, 256
01
00
TGATE
TCY
1
Set T3IF (T5IF)
0
Reset
ADC Event Trigger(2)
Equal
Q
D
Q
CK
TCS(1)
TGATE(1)
TMR3 (TMR5)
Comparator
PR3 (PR5)
Note 1:
2:
The timer clock input must be assigned to an available RPn pin before use. Please see Section 10.4 “Peripheral
Pin Select (PPS)” for more information.
The ADC event trigger is available only on Timer3.
 2010 Microchip Technology Inc.
DS39951C-page 147
PIC24FJ64GA104 FAMILY
REGISTER 12-1:
TxCON: TIMER2 AND TIMER4 CONTROL REGISTER(3)
R/W-0
U-0
R/W-0
U-0
U-0
U-0
U-0
U-0
TON
—
TSIDL
—
—
—
—
—
bit 15
bit 8
U-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
R/W-0
U-0
—
TGATE
TCKPS1
TCKPS0
T32(1)
—
TCS(2)
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
TON: Timerx On bit
When TxCON<3> = 1:
1 = Starts 32-bit Timerx/y
0 = Stops 32-bit Timerx/y
When TxCON<3> = 0:
1 = Starts 16-bit Timerx
0 = Stops 16-bit Timerx
bit 14
Unimplemented: Read as ‘0’
bit 13
TSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-7
Unimplemented: Read as ‘0’
bit 6
TGATE: Timerx Gated Time Accumulation Enable bit
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4
TCKPS<1:0>: Timerx Input Clock Prescale Select bits
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3
T32: 32-Bit Timer Mode Select bit(1)
1 = Timerx and Timery form a single 32-bit timer
0 = Timerx and Timery act as two 16-bit timers
In 32-bit mode, T3CON control bits do not affect 32-bit timer operation.
bit 2
Unimplemented: Read as ‘0’
bit 1
TCS: Timerx Clock Source Select bit(2)
1 = External clock from pin, TxCK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0
Unimplemented: Read as ‘0’
Note 1:
2:
3:
x = Bit is unknown
In 32-bit mode, the T3CON or T5CON control bits do not affect 32-bit timer operation.
If TCS = 1, RPINRx (TxCK) must be configured to an available RPn pin. For more information, see
Section 10.4 “Peripheral Pin Select (PPS)”.
Changing the value of TxCON while the timer is running (TON = 1) causes the timer prescale counter to
reset and is not recommended.
DS39951C-page 148
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 12-2:
TyCON: TIMER3 AND TIMER5 CONTROL REGISTER(3)
R/W-0
U-0
R/W-0
U-0
U-0
U-0
U-0
U-0
TON(1)
—
TSIDL(1)
—
—
—
—
—
bit 15
bit 8
U-0
R/W-0
R/W-0
R/W-0
U-0
U-0
R/W-0
U-0
—
TGATE(1)
TCKPS1(1)
TCKPS0(1)
—
—
TCS(1,2)
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
TON: Timery On bit(1)
1 = Starts 16-bit Timery
0 = Stops 16-bit Timery
bit 14
Unimplemented: Read as ‘0’
bit 13
TSIDL: Stop in Idle Mode bit(1)
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-7
Unimplemented: Read as ‘0’
bit 6
TGATE: Timery Gated Time Accumulation Enable bit(1)
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4
TCKPS<1:0>: Timery Input Clock Prescale Select bits(1)
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3-2
Unimplemented: Read as ‘0’
bit 1
TCS: Timery Clock Source Select bit(1,2)
1 = External clock from pin TyCK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0
Unimplemented: Read as ‘0’
Note 1:
2:
3:
x = Bit is unknown
When 32-bit operation is enabled (T2CON<3> or T4CON<3> = 1), these bits have no effect on Timery
operation; all timer functions are set through T2CON and T4CON.
If TCS = 1, RPINRx (TxCK) must be configured to an available RPn pin. See Section 10.4 “Peripheral
Pin Select (PPS)” for more information.
Changing the value of TyCON while the timer is running (TON = 1) causes the timer prescale counter to
reset and is not recommended.
 2010 Microchip Technology Inc.
DS39951C-page 149
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 150
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
13.0
INPUT CAPTURE WITH
DEDICATED TIMERS
Note:
13.1
13.1.1
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 34. “Input Capture with
Dedicated Timer” (DS39722).
Devices in the PIC24FJ64GA104 family all feature 5
independent input capture modules. Each of the
modules offers a wide range of configuration and
operating options for capturing external pulse events
and generating interrupts.
Key features of the input capture module include:
• Hardware-configurable for 32-bit operation in all
modes by cascading two adjacent modules
• Synchronous and Trigger modes of output
compare operation, with up to 20 user-selectable
trigger/sync sources available
• A 4-level FIFO buffer for capturing and holding
timer values for several events
• Configurable interrupt generation
• Up to 6 clock sources available for each module,
driving a separate internal 16-bit counter
The module is controlled through two registers: ICxCON1
(Register 13-1) and ICxCON2 (Register 13-2). A general
block diagram of the module is shown in Figure 13-1.
FIGURE 13-1:
SYNCHRONOUS AND TRIGGER
MODES
By default, the input capture module operates in a
free-running mode. The internal 16-bit counter ICxTMR
counts up continuously, wrapping around from FFFFh
to 0000h on each overflow, with its period synchronized
to the selected external clock source. When a capture
event occurs, the current 16-bit value of the internal
counter is written to the FIFO buffer.
In Synchronous mode, the module begins capturing
events on the ICx pin as soon as its selected clock
source is enabled. Whenever an event occurs on the
selected sync source, the internal counter is reset. In
Trigger mode, the module waits for a Sync event from
another internal module to occur before allowing the
internal counter to run.
Standard, free-running operation is selected by setting
the SYNCSEL bits to ‘00000’ and clearing the ICTRIG
bit (ICxCON2<7>). Synchronous and Trigger modes
are selected any time the SYNCSEL bits are set to any
value except ‘00000’. The ICTRIG bit selects either
Synchronous or Trigger mode; setting the bit selects
Trigger mode operation. In both modes, the SYNCSEL
bits determine the sync/trigger source.
When the SYNCSEL bits are set to ‘00000’ and
ICTRIG is set, the module operates in Software Trigger
mode. In this case, capture operations are started by
manually setting the TRIGSTAT bit (ICxCON2<6>).
INPUT CAPTURE BLOCK DIAGRAM
ICM<2:0>
ICx Pin(1)
General Operating Modes
Prescaler
Counter
1:1/4/16
ICI<1:0>
Event and
Interrupt
Logic
Edge Detect Logic
and
Clock Synchronizer
Set ICxIF
ICTSEL<2:0>
IC Clock
Sources
Clock
Select
Trigger and
Sync Logic
Trigger and
Sync Sources
Increment
16
ICxTMR
4-Level FIFO Buffer
16
16
Reset
ICxBUF
SYNCSEL<4:0>
Trigger
ICOV, ICBNE
Note 1:
System Bus
The ICx inputs must be assigned to an available RPn pin before use. Please see Section 10.4 “Peripheral
Pin Select (PPS)” for more information.
 2010 Microchip Technology Inc.
DS39951C-page 151
PIC24FJ64GA104 FAMILY
13.1.2
CASCADED (32-BIT) MODE
By default, each module operates independently with
its own 16-bit timer. To increase resolution, adjacent
even and odd modules can be configured to function as
a single 32-bit module. (For example, modules 1 and 2
are paired, as are modules 3 and 4, and so on.) The
odd-numbered module (ICx) provides the Least Significant 16 bits of the 32-bit register pairs, and the even
module (ICy) provides the Most Significant 16 bits.
Wrap-arounds of the ICx registers cause an increment
of their corresponding ICy registers.
Cascaded operation is configured in hardware by
setting the IC32 bits (ICxCON2<8>) for both modules.
13.2
For 32-bit cascaded operations, the setup procedure is
slightly different:
1.
2.
3.
Capture Operations
The input capture module can be configured to capture
timer values and generate interrupts on rising edges on
ICx, or all transitions on ICx. Captures can be configured
to occur on all rising edges or just some (every 4th or
16th). Interrupts can be independently configured to
generate on each event or a subset of events.
4.
5.
Note:
To set up the module for capture operations:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Configure the ICx input for one of the available
Peripheral Pin Select pins.
If Synchronous mode is to be used, disable the
sync source before proceeding.
Make sure that any previous data has been
removed from the FIFO by reading ICxBUF until
the ICBNE bit (ICxCON1<3>) is cleared.
Set the SYNCSEL bits (ICxCON2<4:0>) to the
desired sync/trigger source.
Set the ICTSEL bits (ICxCON1<12:10>) for the
desired clock source. If the desired clock source
is running, set the ICTSEL bits before the Input
Capture module is enabled for proper
synchronization with the desired clock source.
Set the ICI bits (ICxCON1<6:5>) to the desired
interrupt frequency.
Select Synchronous or Trigger mode operation:
a) Check that the SYNCSEL bits are not set to
‘00000’.
b) For Synchronous mode, clear the ICTRIG
bit (ICxCON2<7>).
c) For Trigger mode, set ICTRIG and clear the
TRIGSTAT bit (ICxCON2<6>).
Set the ICM bits (ICxCON1<2:0>) to the desired
operational mode.
Enable the selected trigger/sync source.
DS39951C-page 152
Set the IC32 bits for both modules
(ICyCON2<8> and (ICxCON2<8>), enabling the
even-numbered module first. This ensures the
modules will start functioning in unison.
Set the ICTSEL and SYNCSEL bits for both
modules to select the same sync/trigger and
time base source. Set the even module first,
then the odd module. Both modules must use
the same ICTSEL and SYNCSEL settings.
Clear the ICTRIG bit of the even module
(ICyCON2<7>); this forces the module to run in
Synchronous mode with the odd module,
regardless of its trigger setting.
Use the odd module’s ICI bits (ICxCON1<6:5>)
to the desired interrupt frequency.
Use the ICTRIG bit of the odd module
(ICxCON2<7>) to configure Trigger or
Synchronous mode operation.
6.
For Synchronous mode operation, enable
the sync source as the last step. Both
input capture modules are held in Reset
until the sync source is enabled.
Use the ICM bits of the odd module
(ICxCON1<2:0>) to set the desired capture
mode.
The module is ready to capture events when the time
base and the trigger/sync source are enabled. When
the ICBNE bit (ICxCON1<3>) becomes set, at least
one capture value is available in the FIFO. Read input
capture values from the FIFO until the ICBNE clears to
‘0’.
For 32-bit operation, read both the ICxBUF and
ICyBUF for the full 32-bit timer value (ICxBUF for the
lsw, ICyBUF for the msw). At least one capture value is
available in the FIFO buffer when the odd module’s
ICBNE bit (ICxCON1<3>) becomes set. Continue to
read the buffer registers until ICBNE is cleared
(perform automatically by hardware).
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 13-1:
ICxCON1: INPUT CAPTURE x CONTROL REGISTER 1
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
U-0
—
—
ICSIDL
ICTSEL2
ICTSEL1
ICTSEL0
—
—
bit 15
bit 8
U-0
R/W-0
R/W-0
R-0, HCS
R-0, HCS
R/W-0
R/W-0
R/W-0
—
ICI1
ICI0
ICOV
ICBNE
ICM2(1)
ICM1(1)
ICM0(1)
bit 7
bit 0
Legend:
HCS = Hardware Clearable/Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-14
Unimplemented: Read as ‘0’
bit 13
ICSIDL: Input Capture x Module Stop in Idle Control bit
1 = Input capture module halts in CPU Idle mode
0 = Input capture module continues to operate in CPU Idle mode
bit 12-10
ICTSEL<2:0>: Input Capture Timer Select bits
111 = System clock (FOSC/2)
110 = Reserved
101 = Reserved
100 = Timer1
011 = Timer5
010 = Timer4
001 = Timer2
000 = Timer3
bit 9-7
Unimplemented: Read as ‘0’
bit 6-5
ICI<1:0>: Select Number of Captures per Interrupt bits
11 = Interrupt on every fourth capture event
10 = Interrupt on every third capture event
01 = Interrupt on every second capture event
00 = Interrupt on every capture event
bit 4
ICOV: Input Capture x Overflow Status Flag bit (read-only)
1 = Input capture overflow occurred
0 = No input capture overflow occurred
bit 3
ICBNE: Input Capture x Buffer Empty Status bit (read-only)
1 = Input capture buffer is not empty, at least one more capture value can be read
0 = Input capture buffer is empty
bit 2-0
ICM<2:0>: Input Capture Mode Select bits(1)
111 = Interrupt mode: input capture functions as interrupt pin only when device is in Sleep or Idle mode
(rising edge detect only, all other control bits are not applicable)
110 = Unused (module disabled)
101 = Prescaler Capture mode: capture on every 16th rising edge
100 = Prescaler Capture mode: capture on every 4th rising edge
011 = Simple Capture mode: capture on every rising edge
010 = Simple Capture mode: capture on every falling edge
001 = Edge Detect Capture mode: capture on every edge (rising and falling); ICI<1:0 bits do not control
interrupt generation for this mode
000 = Input capture module turned off
Note 1:
The ICx input must also be configured to an available RPn pin. For more information, see Section 10.4
“Peripheral Pin Select (PPS)”.
 2010 Microchip Technology Inc.
DS39951C-page 153
PIC24FJ64GA104 FAMILY
REGISTER 13-2:
ICxCON2: INPUT CAPTURE x CONTROL REGISTER 2
U-0
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0
—
—
—
—
—
—
—
IC32
bit 15
bit 8
R/W-0
R/W-0, HS
U-0
R/W-0
R/W-1
R/W-1
R/W-0
R/W-1
ICTRIG
TRIGSTAT
—
SYNCSEL4
SYNCSEL3
SYNCSEL2
SYNCSEL1
SYNCSEL0
bit 7
bit 0
Legend:
HS = Hardware Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-9
Unimplemented: Read as ‘0’
bit 8
IC32: Cascade Two IC Modules Enable bit (32-bit operation)
1 = ICx and ICy operate in cascade as a 32-bit module (this bit must be set in both modules)
0 = ICx functions independently as a 16-bit module
bit 7
ICTRIG: ICx Trigger/Sync Select bit
1 = Trigger ICx from source designated by SYNCSELx bits
0 = Synchronize ICx with source designated by SYNCSELx bits
bit 6
TRIGSTAT: Timer Trigger Status bit
1 = Timer source has been triggered and is running (set in hardware, can be set in software)
0 = Timer source has not been triggered and is being held clear
bit 5
Unimplemented: Read as ‘0’
bit 4-0
SYNCSEL<4:0>: Trigger/Synchronization Source Selection bits
11111 = Reserved
11110 = Reserved
11101 = Reserved
11100 = CTMU(1)
11011 = A/D(1)
11010 = Comparator 3(1)
11001 = Comparator 2(1)
11000 = Comparator 1(1)
10111 = Input Capture 4
10110 = Input Capture 3
10101 = Input Capture 2
10100 = Input Capture 1
10011 = Reserved
10010 = Reserved
1000x = Reserved
01111 = Timer5
01110 = Timer4
01101 = Timer3
01100 = Timer2
01011 = Timer1
01010 = Input Capture 5
01001 = Reserved
01000 = Reserved
00111 = Reserved
00110 = Reserved
00101 = Output Compare 5
00100 = Output Compare 4
00011 = Output Compare 3
00010 = Output Compare 2
00001 = Output Compare 1
00000 = Not synchronized to any other module
Note 1:
Use these inputs as trigger sources only and never as sync sources.
DS39951C-page 154
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
14.0
Note:
OUTPUT COMPARE WITH
DEDICATED TIMERS
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 35. “Output Capture with
Dedicated Timer” (DS39723).
All devices in the PIC24FJ64GA104 family features
5 independent output compare modules. Each of these
modules offers a wide range of configuration and operating options for generating pulse trains on internal
device events, and can produce Pulse-Width Modulated
(PWM) waveforms for driving power applications.
Key features of the output compare module include:
• Hardware-configurable for 32-bit operation in all
modes by cascading two adjacent modules
• Synchronous and Trigger modes of output
compare operation, with up to 21 user-selectable
trigger/sync sources available
• Two separate Period registers (a main register,
OCxR, and a secondary register, OCxRS) for
greater flexibility in generating pulses of varying
widths
• Configurable for single pulse or continuous pulse
generation on an output event or continuous
PWM waveform generation
• Up to 6 clock sources available for each module,
driving a separate internal 16-bit counter
14.1
14.1.1
In Synchronous mode, the module begins performing
its compare or PWM operation as soon as its selected
clock source is enabled. Whenever an event occurs on
the selected sync source, the module’s internal counter
is reset. In Trigger mode, the module waits for a sync
event from another internal module to occur before
allowing the counter to run.
Free-Running mode is selected by default or any time
that the SYNCSEL bits (OCxCON2<4:0>) are set to
‘00000’. Synchronous or Trigger modes are selected
any time the SYNCSEL bits are set to any value except
‘00000’. The OCTRIG bit (OCxCON2<7>) selects
either Synchronous or Trigger mode; setting the bit
selects Trigger mode operation. In both modes, the
SYNCSEL bits determine the sync/trigger source.
14.1.2
CASCADED (32-BIT) MODE
By default, each module operates independently with
its own set of 16-bit Timer and Duty Cycle registers. To
increase the range, adjacent even and odd modules
can be configured to function as a single 32-bit module.
(For example, Modules 1 and 2 are paired, as are
Modules 3 and 4, and so on.) The odd-numbered
module (OCx) provides the Least Significant 16 bits of
the 32-bit register pairs and the even-numbered
module (OCy) provides the Most Significant 16 bits.
Wrap-arounds of the OCx registers cause an increment
of their corresponding OCy registers.
Cascaded operation is configured in hardware by setting
the OC32 bit (OCxCON2<8>) for both modules.
General Operating Modes
SYNCHRONOUS AND TRIGGER
MODES
By default, the output compare module operates in a
Free-Running mode. The internal 16-bit counter,
OCxTMR, runs counts up continuously, wrapping
around from FFFFh to 0000h on each overflow with its
period synchronized to the selected external clock
source. Compare or PWM events are generated each
time a match between the internal counter and one of
the Period registers occurs.
 2010 Microchip Technology Inc.
DS39951C-page 155
PIC24FJ64GA104 FAMILY
FIGURE 14-1:
OUTPUT COMPARE BLOCK DIAGRAM (16-BIT MODE)
DCBx
OCMx
OCINV
OCTRIS
FLTOUT
FLTTRIEN
FLTMD
ENFLTx
OCFLTx
OCxCON1
OCTSELx
SYNCSELx
TRIGSTAT
TRIGMODE
OCTRIG
Clock
Select
OC Clock
Sources
OCxCON2
OCxR
Increment
Comparator
OC Output and
Fault Logic
OCxTMR
Reset
Match Event
Trigger and
Sync Sources
Trigger and
Sync Logic
Comparator
OCx Pin(1)
Match Event
Match Event
OCFA/
OCFB/
CxOUT
OCxRS
Reset
OCx Interrupt
Note 1:
The OCx outputs must be assigned to an available RPn pin before use. Please see Section 10.4 “Peripheral
Pin Select (PPS)” for more information.
DS39951C-page 156
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
14.2
Compare Operations
In Compare mode (Figure 14-1), the output compare
module can be configured for single-shot or continuous
pulse generation; it can also repeatedly toggle an
output pin on each timer event.
To set up the module for compare operations:
1.
2.
3.
4.
5.
6.
7.
Configure the OCx output for one of the
available Peripheral Pin Select pins.
Calculate the required values for the OCxR and
(for Double Compare modes) OCxRS Duty Cycle
registers:
a) Determine the instruction clock cycle time.
Take into account the frequency of the
external clock to the timer source (if one is
used) and the timer prescaler settings.
b) Calculate time to the rising edge of the
output pulse relative to the timer start value
(0000h).
c) Calculate the time to the falling edge of the
pulse based on the desired pulse width and
the time to the rising edge of the pulse.
Write the rising edge value to OCxR and the
falling edge value to OCxRS.
For Trigger mode operations, set OCTRIG to
enable Trigger mode. Set or clear TRIGMODE to
configure trigger operation and TRIGSTAT to
select a hardware or software trigger. For
Synchronous mode, clear OCTRIG.
Set the SYNCSEL<4:0> bits to configure the
trigger or synchronization source. If free-running
timer operation is required, set the SYNCSEL
bits to ‘00000’ (no sync/trigger source).
Select the time base source with the
OCTSEL<2:0> bits. If the desired clock source is
running, set the OCTSEL<2:0> bits before the
output compare module is enabled for proper
synchronization with the desired clock source. If
necessary, set the TON bit for the selected timer
which enables the compare time base to count.
Synchronous mode operation starts as soon as
the synchronization source is enabled. Trigger
mode operation starts after a trigger source event
occurs.
Set the OCM<2:0> bits for the appropriate
compare operation (= 0xx).
 2010 Microchip Technology Inc.
For 32-bit cascaded operation, these steps are also
necessary:
1.
2.
3.
4.
5.
6.
Set the OC32 bits for both registers
(OCyCON2<8> and (OCxCON2<8>). Enable
the even-numbered module first to ensure the
modules will start functioning in unison.
Clear the OCTRIG bit of the even module
(OCyCON2), so the module will run in
Synchronous mode.
Configure the desired output and Fault settings
for OCy.
Force the output pin for OCx to the output state
by clearing the OCTRIS bit.
If Trigger mode operation is required, configure
the trigger options in OCx by using the OCTRIG
(OCxCON2<7>), TRIGSTAT (OCxCON2<6>)
and SYNCSEL (OCxCON2<4:0>) bits.
Configure the desired Compare or PWM mode
of operation (OCM<2:0>) for OCy first, then for
OCx.
Depending on the output mode selected, the module
holds the OCx pin in its default state and forces a
transition to the opposite state when OCxR matches
the timer. In Double Compare modes, OCx is forced
back to its default state when a match with OCxRS
occurs. The OCxIF interrupt flag is set after an OCxR
match in Single Compare modes and after each
OCxRS match in Double Compare modes.
Single-shot pulse events only occur once, but may be
repeated by simply rewriting the value of the
OCxCON1 register. Continuous pulse events continue
indefinitely until terminated.
DS39951C-page 157
PIC24FJ64GA104 FAMILY
14.3
Pulse-Width Modulation (PWM)
Mode
5.
6.
In PWM mode, the output compare module can be
configured for edge-aligned or center-aligned pulse
waveform generation. All PWM operations are
double-buffered (buffer registers are internal to the
module and are not mapped into SFR space).
To configure the output compare
edge-aligned PWM operation:
1.
2.
3.
4.
module
7.
8.
for
Note:
Configure the OCx output for one of the
available Peripheral Pin Select pins.
Calculate the desired on-time and load it into the
OCxR register.
Calculate the desired period and load it into the
OCxRS register.
Select the current OCx as the synchronization
source by writing 0x1F to SYNCSEL<4:0>
(OCxCON2<4:0>) and ‘0’ to OCTRIG
(OCxCON2<7>).
FIGURE 14-2:
Select a clock source by writing to the
OCTSEL2<2:0> (OCxCON1<12:10>) bits.
Enable interrupts, if required, for the timer and
output compare modules. The output compare
interrupt is required for PWM Fault pin utilization.
Select the desired PWM mode in the OCM<2:0>
(OCxCON1<2:0>) bits.
If a timer is selected as a clock source, set the
TMRy prescale value and enable the time base by
setting the TON (TxCON<15>) bit.
This peripheral contains input and output
functions that may need to be configured
by the Peripheral Pin Select. See
Section 10.4 “Peripheral Pin Select
(PPS)” for more information.
OUTPUT COMPARE BLOCK DIAGRAM
(DOUBLE-BUFFERED, 16-BIT PWM MODE)
OCxCON1
OCxCON2
OCTSELx
SYNCSELx
TRIGSTAT
TRIGMODE
OCTRIG
OCxR and DCB<1:0>
Rollover/Reset
OCxR and DCB<1:0> Buffers
OCMx
OCINV
OCTRIS
FLTOUT
FLTTRIEN
FLTMD
ENFLTx
OCFLTx
DCB<1:0>
OCx Pin(1)
Clock
Select
OC Clock
Sources
Increment
Comparator
OCxTMR
Reset
Trigger and
Sync Sources
Trigger and
Sync Logic
Match Event
Comparator
Match
Event
Rollover
OC Output Timing
and Fault Logic
OCFA/OCFB/CxOUT
Match
Event
OCxRS Buffer
Rollover/Reset
OCxRS
OCx Interrupt
Reset
Note 1:
The OCx outputs must be assigned to an available RPn pin before use. Please see Section 10.4 “Peripheral Pin
Select (PPS)” for more information.
DS39951C-page 158
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
14.3.1
PWM PERIOD
14.3.2
PWM DUTY CYCLE
In edge aligned PWM mode, the period is specified by
the value of OCxRS register. In center aligned PWM
mode, the period of the synchronization source such as
Timer's PRy specifies the period. The period in both
cases can be calculated using Equation 14-1.
The PWM duty cycle is specified by writing to the
OCxRS and OCxR registers. The OCxRS and OCxR
registers can be written to at any time, but the duty
cycle value is not latched until a period is complete.
This provides a double buffer for the PWM duty cycle
and is essential for glitchless PWM operation.
EQUATION 14-1:
Some important boundary parameters of the PWM duty
cycle include:
CALCULATING THE PWM
PERIOD(1)
• Edge-Aligned PWM
- If OCxR and OCxRS are loaded with 0000h,
the OCx pin will remain low (0% duty cycle).
- If OCxRS is greater than OCxR, the pin will
remain high (100% duty cycle).
• Center-Aligned PWM (with TMRy as the sync
source)
- If OCxR, OCxRS and PRy are all loaded with
0000h, the OCx pin will remain low (0% duty
cycle).
- If OCxRS is greater than PRy, the pin will go
high (100% duty cycle).
PWM Period = [Value + 1] x TCY x (Prescaler Value)
Where: Value = OCxRS in Edge-Aligned PWM mode
and can be PRy in Center-Aligned PWM mode
(If TMRy is the sync source).
Note 1:
Based on TCY = TOSC * 2; Doze mode
and PLL are disabled.
See Example 14-1 for PWM mode timing details.
Table 14-1 and Table 14-2 show example PWM
frequencies and resolutions for a device operating at
4 MIPS and 10 MIPS, respectively.
EQUATION 14-2:
CALCULATION FOR MAXIMUM PWM RESOLUTION(1)
log10
Maximum PWM Resolution (bits) =
(F
PWM
FCY
• (Prescale Value)
log10(2)
) bits
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
EXAMPLE 14-1:
PWM PERIOD AND DUTY CYCLE CALCULATIONS(1)
1. Find the OCxRS register value for a desired PWM frequency of 52.08 kHz, where FOSC = 8 MHz with PLL (32 MHz device
clock rate) and a prescaler setting of 1:1 using Edge-Aligned PWM mode.
TCY = 2 * TOSC = 62.5 ns
PWM Period = 1/PWM Frequency = 1/52.08 kHz = 19.2 s
PWM Period = (OCxRS + 1) • TCY • (OCx Prescale Value)
19.2 s
= (OCxRS + 1) • 62.5 ns • 1
OCxRS
= 306
2. Find the maximum resolution of the duty cycle that can be used with a 52.08 kHz frequency and a 32 MHz device clock rate:
PWM Resolution = log10 (FCY/FPWM)/log102) bits
= (log10 (16 MHz/52.08 kHz)/log102) bits
= 8.3 bits
Note 1:
Based on TCY = 2 * TOSC; Doze mode and PLL are disabled.
 2010 Microchip Technology Inc.
DS39951C-page 159
PIC24FJ64GA104 FAMILY
14.4
Subcycle Resolution
The DCB bits are intended for use with a clock source
identical to the system clock. When an OCx module
with enabled prescaler is used, the falling edge delay
caused by the DCB bits will be referenced to the
system clock period, rather than the OCx module's
period.
The DCB bits (OCxCON2<10:9>) provide for resolution
better than one instruction cycle. When used, they
delay the falling edge generated by a match event by a
portion of an instruction cycle.
For example, setting DCB<1:0> = 10 causes the falling
edge to occur half way through the instruction cycle in
which the match event occurs, instead of at the
beginning. These bits cannot be used when
OCM<2:0> = 001. When operating the module in PWM
mode (OCM<2:0> = 110 or 111), the DCB bits will be
double-buffered.
TABLE 14-1:
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (FCY = 4 MHz)(1)
PWM Frequency
Prescaler Ratio
Period Value
Resolution (bits)
Note 1:
61 Hz
122 Hz
977 Hz
3.9 kHz
31.3 kHz
125 kHz
8
1
1
1
1
1
1
FFFFh
FFFFh
7FFFh
0FFFh
03FFh
007Fh
001Fh
16
16
15
12
10
7
5
Based on FCY = FOSC/2; Doze mode and PLL are disabled.
TABLE 14-2:
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (FCY = 16 MHz)(1)
PWM Frequency
Prescaler Ratio
Period Value
Resolution (bits)
Note 1:
7.6 Hz
30.5 Hz
244 Hz
488 Hz
3.9 kHz
15.6 kHz
125 kHz
500 kHz
8
1
1
1
1
1
1
FFFFh
FFFFh
7FFFh
0FFFh
03FFh
007Fh
001Fh
16
16
15
12
10
7
5
Based on FCY = FOSC/2; Doze mode and PLL are disabled.
DS39951C-page 160
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 14-1:
U-0
OCxCON1: OUTPUT COMPARE x CONTROL REGISTER 1
U-0
—
R/W-0
—
R/W-0
OCSIDL
OCTSEL2
R/W-0
OCTSEL1
R/W-0
OCTSEL0
R/W-0
ENFLT2
(2)
R/W-0
ENFLT1
bit 15
bit 8
R/W-0
R/W-0, HCS
R/W-0, HCS
R/W-0, HCS
R/W-0
R/W-0
R/W-0
R/W-0
ENFLT0
OCFLT2
OCFLT1
OCFLT0
TRIGMODE
OCM2(1)
OCM1(1)
OCM0(1)
bit 7
bit 0
Legend:
HCS = Hardware Clearable/Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-14
Unimplemented: Read as ‘0’
bit 13
OCSIDL: Stop Output Compare x in Idle Mode Control bit
1 = Output compare x halts in CPU Idle mode
0 = Output compare x continues to operate in CPU Idle mode
bit 12-10
OCTSEL<2:0>: Output Compare x Timer Select bits
111 = System clock
110 = Reserved
101 = Reserved
100 = Timer1
011 = Timer5
010 = Timer4
001 = Timer3
000 = Timer2
bit 9
ENFLT2: Comparator Fault Input Enable bit(2)
1 = Comparator Fault input is enabled
0 = Comparator Fault input is disabled
bit 8
ENFLT1: OCFB Fault Input Enable bit
1 = OCFB Fault input is enabled
0 = OCFB Fault input is disabled
bit 7
ENFLT0: OCFA Fault Input Enable bit
1 = OCFA Fault input is enabled
0 = OCFA Fault input is disabled
bit 6
OCFLT2: PWM Comparator Fault Condition Status bit(2)
1 = PWM comparator Fault condition has occurred (this is cleared in hardware only)
0 = PWM comparator Fault condition has not occurred (this bit is used only when OCM<2:0> = 111)
bit 5
OCFLT1: PWM OCFB Fault Input Enable bit
1 = PWM OCFB Fault condition has occurred (this is cleared in hardware only)
0 = PWM OCFB Fault condition has not occurred (this bit is used only when OCM<2:0> = 111)
bit 4
OCFLT0: PWM OCFA Fault Condition Status bit
1 = PWM OCFA Fault condition has occurred (this is cleared in hardware only)
0 = PWM OCFA Fault condition has not occurred (this bit is used only when OCM<2:0> = 111)
bit 3
TRIGMODE: Trigger Status Mode Select bit
1 = TRIGSTAT (OCxCON2<6>) is cleared when OCxRS = OCxTMR or in software
0 = TRIGSTAT is only cleared by software
Note 1:
2:
The OCx output must also be configured to an available RPn pin. For more information, see Section 10.4
“Peripheral Pin Select (PPS)”.
The comparator module used for Fault input varies with the OCx module. OC1 and OC2 use Comparator 1;
OC3 and OC4 use Comparator 2; OC5 uses Comparator 3.
 2010 Microchip Technology Inc.
DS39951C-page 161
PIC24FJ64GA104 FAMILY
REGISTER 14-1:
OCxCON1: OUTPUT COMPARE x CONTROL REGISTER 1 (CONTINUED)
OCM<2:0>: Output Compare x Mode Select bits(1)
111 = Center-Aligned PWM mode on OCx
110 = Edge-Aligned PWM mode on OCx
101 = Double Compare Continuous Pulse mode: initialize OCx pin low, toggle OCx state continuously
on alternate matches of OCxR and OCxRS
100 = Double Compare Single-Shot mode: initialize OCx pin low, toggle OCx state on matches of
OCxR and OCxRS for one cycle
011 = Single Compare Continuous Pulse mode: compare events continuously toggle OCx pin
010 = Single Compare Single-Shot mode: initialize OCx pin high, compare event forces OCx pin low
001 = Single Compare Single-Shot mode: initialize OCx pin low, compare event forces OCx pin high
000 = Output compare channel is disabled
bit 2-0
Note 1:
2:
The OCx output must also be configured to an available RPn pin. For more information, see Section 10.4
“Peripheral Pin Select (PPS)”.
The comparator module used for Fault input varies with the OCx module. OC1 and OC2 use Comparator 1;
OC3 and OC4 use Comparator 2; OC5 uses Comparator 3.
DS39951C-page 162
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 14-2:
R/W-0
OCxCON2: OUTPUT COMPARE x CONTROL REGISTER 2
R/W-0
FLTMD
R/W-0
FLTOUT
R/W-0
FLTTRIEN
U-0
R/W-0
—
OCINV
DCB1
(3)
R/W-0
DCB0
R/W-0
(3)
OC32
bit 15
bit 8
R/W-0
R/W-0, HS
R/W-0
R/W-0
R/W-1
R/W-1
R/W-0
R/W-0
OCTRIG
TRIGSTAT
OCTRIS
SYNCSEL4
SYNCSEL3
SYNCSEL2
SYNCSEL1
SYNCSEL0
bit 7
bit 0
Legend:
HS = Hardware Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
FLTMD: Fault Mode Select bit
1 = Fault mode is maintained until the Fault source is removed and the corresponding OCFLT0 bit is
cleared in software
0 = Fault mode is maintained until the Fault source is removed and a new PWM period starts
bit 14
FLTOUT: Fault Out bit
1 = PWM output is driven high on a Fault
0 = PWM output is driven low on a Fault
bit 13
FLTTRIEN: Fault Output State Select bit
1 = Pin is forced to an output on a Fault condition
0 = Pin I/O condition is unaffected by a Fault
bit 12
OCINV: OCMP Invert bit
1 = OCx output is inverted
0 = OCx output is not inverted
bit 11
Unimplemented: Read as ‘0’
bit 10-9
DCB<1:0>: OC Pulse-Width Least Significant bits(3)
11 = Delay OCx falling edge by 3/4 of the instruction cycle
10 = Delay OCx falling edge by 1/2 of the instruction cycle
01 = Delay OCx falling edge by 1/4 of the instruction cycle
00 = OCx falling edge occurs at start of the instruction cycle
bit 8
OC32: Cascade Two OC Modules Enable bit (32-bit operation)
1 = Cascade module operation enabled
0 = Cascade module operation disabled
bit 7
OCTRIG: OCx Trigger/Sync Select bit
1 = Trigger OCx from source designated by SYNCSELx bits
0 = Synchronize OCx with source designated by SYNCSELx bits
bit 6
TRIGSTAT: Timer Trigger Status bit
1 = Timer source has been triggered and is running
0 = Timer source has not been triggered and is being held clear
bit 5
OCTRIS: OCx Output Pin Direction Select bit
1 = OCx pin is tri-stated
0 = Output compare peripheral x connected to OCx pin
Note 1:
2:
3:
Do not use an OC module as its own trigger source, either by selecting this mode or another equivalent
SYNCSEL setting.
Use these inputs as trigger sources only and never as sync sources.
These bits affect the rising edge when OCINV = 1. The bits have no effect when the
OCM bits (OCxCON1<1:0>) = 001.
 2010 Microchip Technology Inc.
DS39951C-page 163
PIC24FJ64GA104 FAMILY
REGISTER 14-2:
bit 4-0
OCxCON2: OUTPUT COMPARE x CONTROL REGISTER 2 (CONTINUED)
SYNCSEL<4:0>: Trigger/Synchronization Source Selection bits
11111 = This OC module(1)
11110 = Reserved
11101 = Reserved
11100 = CTMU(2)
11011 = A/D(2)
11010 = Comparator 3(2)
11001 = Comparator 2(2)
11000 = Comparator 1(2)
10111 = Input Capture 4(2)
10110 = Input Capture 3(2)
10101 = Input Capture 2(2)
10100 = Input Capture 1(2)
100xx = Reserved
01111 = Timer5
01110 = Timer4
01101 = Timer3
01100 = Timer2
01011 = Timer1
01010 = Input Capture 5(2)
01001 = Reserved
01000 = Reserved
00111 = Reserved
00110 = Reserved
00101 = Output Compare 5(1)
00100 = Output Compare 4(1)
00011 = Output Compare 3(1)
00010 = Output Compare 2(1)
00001 = Output Compare 1(1)
00000 = Not synchronized to any other module
Note 1:
2:
3:
Do not use an OC module as its own trigger source, either by selecting this mode or another equivalent
SYNCSEL setting.
Use these inputs as trigger sources only and never as sync sources.
These bits affect the rising edge when OCINV = 1. The bits have no effect when the
OCM bits (OCxCON1<1:0>) = 001.
DS39951C-page 164
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
15.0
Note:
SERIAL PERIPHERAL
INTERFACE (SPI)
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 23. “Serial Peripheral Interface
(SPI)” (DS39699).
The Serial Peripheral Interface (SPI) module is a
synchronous serial interface useful for communicating
with other peripheral or microcontroller devices. These
peripheral devices may be serial EEPROMs, shift
registers, display drivers, A/D Converters, etc. The SPI
module is compatible with Motorola® SPI and SIOP
interfaces. All devices of the PIC24FJ64GA104 family
include three SPI modules
The module supports operation in two buffer modes. In
Standard mode, data is shifted through a single serial
buffer. In Enhanced Buffer mode, data is shifted
through an 8-level FIFO buffer.
Note:
The SPI serial interface consists of four pins:
•
•
•
•
SDIx: Serial Data Input
SDOx: Serial Data Output
SCKx: Shift Clock Input or Output
SSx: Active-Low Slave Select or Frame
Synchronization I/O Pulse
The SPI module can be configured to operate using
2, 3 or 4 pins. In the 3-pin mode, SSx is not used. In the
2-pin mode, both SDOx and SSx are not used.
Block diagrams of the module in Standard and
Enhanced modes are shown in Figure 15-1 and
Figure 15-2.
Note:
In this section, the SPI modules are
referred to together as SPIx or separately
as SPI1, SPI2 or SPI3. Special Function
Registers will follow a similar notation. For
example, SPIxCON1 and SPIxCON2 refer
to the control registers for any of the 3 SPI
modules.
Do not perform read-modify-write operations (such as bit-oriented instructions) on
the SPIxBUF register in either Standard or
Enhanced Buffer mode.
The module also supports a basic framed SPI protocol
while operating in either Master or Slave mode. A total
of four framed SPI configurations are supported.
 2010 Microchip Technology Inc.
DS39951C-page 165
PIC24FJ64GA104 FAMILY
To set up the SPI module for the Standard Master mode
of operation:
To set up the SPI module for the Standard Slave mode
of operation:
1.
1.
2.
2.
3.
4.
5.
If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register to set the interrupt priority.
Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 1.
Clear the SPIROV bit (SPIxSTAT<6>).
Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
Write the data to be transmitted to the SPIxBUF
register. Transmission (and reception) will start
as soon as data is written to the SPIxBUF
register.
FIGURE 15-1:
Clear the SPIxBUF register.
If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register to set the interrupt priority.
Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 0.
Clear the SMP bit.
If the CKE bit (SPIxCON1<8>) is set, then the
SSEN bit (SPIxCON1<7>) must be set to enable
the SSx pin.
Clear the SPIROV bit (SPIxSTAT<6>).
Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
3.
4.
5.
6.
7.
SPIx MODULE BLOCK DIAGRAM (STANDARD MODE)
SCKx
1:1 to 1:8
Secondary
Prescaler
SSx/FSYNCx
Sync
Control
1:1/4/16/64
Primary
Prescaler
Select
Edge
Control
Clock
SPIxCON1<1:0>
SPIxCON1<4:2>
Shift Control
SDOx
Enable
Master Clock
bit 0
SDIx
FCY
SPIxSR
Transfer
Transfer
SPIxBUF
Read SPIxBUF
Write SPIxBUF
16
Internal Data Bus
DS39951C-page 166
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
To set up the SPI module for the Enhanced Buffer
Master mode of operation:
To set up the SPI module for the Enhanced Buffer
Slave mode of operation:
1.
1.
2.
2.
3.
4.
5.
6.
If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register.
Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 1.
Clear the SPIROV bit (SPIxSTAT<6>).
Select Enhanced Buffer mode by setting the
SPIBEN bit (SPIxCON2<0>).
Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
Write the data to be transmitted to the SPIxBUF
register. Transmission (and reception) will start
as soon as data is written to the SPIxBUF
register.
FIGURE 15-2:
3.
4.
5.
6.
7.
8.
Clear the SPIxBUF register.
If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register to set the interrupt priority.
Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 0.
Clear the SMP bit.
If the CKE bit is set, then the SSEN bit must be
set, thus enabling the SSx pin.
Clear the SPIROV bit (SPIxSTAT<6>).
Select Enhanced Buffer mode by setting the
SPIBEN bit (SPIxCON2<0>).
Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
SPIx MODULE BLOCK DIAGRAM (ENHANCED MODE)
SCKx
1:1 to 1:8
Secondary
Prescaler
SSx/FSYNCx
Sync
Control
1:1/4/16/64
Primary
Prescaler
Select
Edge
Control
Clock
SPIxCON1<1:0>
SPIxCON1<4:2>
Shift Control
SDOx
Enable
Master Clock
bit 0
SDIx
FCY
SPIxSR
Transfer
Transfer
8-Level FIFO
Receive Buffer
8-Level FIFO
Transmit Buffer
SPIxBUF
Read SPIxBUF
Write SPIxBUF
16
Internal Data Bus
 2010 Microchip Technology Inc.
DS39951C-page 167
PIC24FJ64GA104 FAMILY
REGISTER 15-1:
R/W-0
SPIEN
(1)
SPIxSTAT: SPIx STATUS AND CONTROL REGISTER
U-0
R/W-0
U-0
U-0
R-0
R-0
R-0
—
SPISIDL
—
—
SPIBEC2
SPIBEC1
SPIBEC0
bit 15
bit 8
R-0
R/C-0, HS
R/W-0
R/W-0
R/W-0
R/W-0
R-0
R-0
SRMPT
SPIROV
SRXMPT
SISEL2
SISEL1
SISEL0
SPITBF
SPIRBF
bit 7
bit 0
Legend:
C = Clearable bit
HS = Hardware Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
SPIEN: SPIx Enable bit(1)
1 = Enables module and configures SCKx, SDOx, SDIx and SSx as serial port pins
0 = Disables module
bit 14
Unimplemented: Read as ‘0’
bit 13
SPISIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-11
Unimplemented: Read as ‘0’
bit 10-8
SPIBEC<2:0>: SPIx Buffer Element Count bits (valid in Enhanced Buffer mode)
Master mode:
Number of SPI transfers that are pending.
Slave mode:
Number of SPI transfers that are unread.
bit 7
SRMPT: Shift Register (SPIxSR) Empty bit (valid in Enhanced Buffer mode)
1 = SPIx Shift register is empty and ready to send or receive
0 = SPIx Shift register is not empty
bit 6
SPIROV: Receive Overflow Flag bit
1 = A new byte/word is completely received and discarded. The user software has not read the previous
data in the SPIxBUF register.
0 = No overflow has occurred
bit 5
SRXMPT: Receive FIFO Empty bit (valid in Enhanced Buffer mode)
1 = Receive FIFO is empty
0 = Receive FIFO is not empty
bit 4-2
SISEL<2:0>: SPIx Buffer Interrupt Mode bits (valid in Enhanced Buffer mode)
111 = Interrupt when SPIx transmit buffer is full (SPITBF bit is set)
110 = Interrupt when last bit is shifted into SPIxSR; as a result, the TX FIFO is empty
101 = Interrupt when the last bit is shifted out of SPIxSR; now the transmit is complete
100 = Interrupt when one data is shifted into the SPIxSR; as a result, the TX FIFO has one open spot
011 = Interrupt when SPIx receive buffer is full (SPIRBF bit is set)
010 = Interrupt when SPIx receive buffer is 3/4 or more full
001 = Interrupt when data is available in the receive buffer (SRMPT bit is set)
000 = Interrupt when the last data in the receive buffer is read; as a result, the buffer is empty
(SRXMPT bit set)
Note 1:
If SPIEN = 1, these functions must be assigned to available RPn pins before use. See Section 10.4
“Peripheral Pin Select (PPS)” for more information.
DS39951C-page 168
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 15-1:
SPIxSTAT: SPIx STATUS AND CONTROL REGISTER (CONTINUED)
bit 1
SPITBF: SPIx Transmit Buffer Full Status bit
1 = Transmit not yet started; SPIxTXB is full
0 = Transmit started; SPIxTXB is empty
In Standard Buffer mode:
Automatically set in hardware when CPU writes SPIxBUF location, loading SPIxTXB. Automatically
cleared in hardware when SPIx module transfers data from SPIxTXB to SPIxSR.
In Enhanced Buffer mode:
Automatically set in hardware when CPU writes SPIxBUF location, loading the last available buffer location.
Automatically cleared in hardware when a buffer location is available for a CPU write.
bit 0
SPIRBF: SPIx Receive Buffer Full Status bit
1 = Receive is complete, SPIxRXB is full
0 = Receive is not complete, SPIxRXB is empty
In Standard Buffer mode:
Automatically set in hardware when SPIx transfers data from SPIxSR to SPIxRXB. Automatically
cleared in hardware when core reads SPIxBUF location, reading SPIxRXB.
In Enhanced Buffer mode:
Automatically set in hardware when SPIx transfers data from SPIxSR to buffer, filling the last unread
buffer location. Automatically cleared in hardware when a buffer location is available for a transfer from
SPIxSR.
Note 1:
If SPIEN = 1, these functions must be assigned to available RPn pins before use. See Section 10.4
“Peripheral Pin Select (PPS)” for more information.
 2010 Microchip Technology Inc.
DS39951C-page 169
PIC24FJ64GA104 FAMILY
REGISTER 15-2:
SPIXCON1: SPIx CONTROL REGISTER 1
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
DISSCK(1)
DISSDO(2)
MODE16
SMP
CKE(3)
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
CKP
MSTEN
SPRE2
SPRE1
SPRE0
PPRE1
PPRE0
(4)
SSEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12
DISSCK: Disable SCKx pin bit (SPI Master modes only)(1)
1 = Internal SPI clock is disabled; pin functions as I/O
0 = Internal SPI clock is enabled
bit 11
DISSDO: Disable SDOx pin bit(2)
1 = SDOx pin is not used by module; pin functions as I/O
0 = SDOx pin is controlled by the module
bit 10
MODE16: Word/Byte Communication Select bit
1 = Communication is word-wide (16 bits)
0 = Communication is byte-wide (8 bits)
bit 9
SMP: SPIx Data Input Sample Phase bit
Master mode:
1 = Input data is sampled at the end of data output time
0 = Input data is sampled at the middle of data output time
Slave mode:
SMP must be cleared when SPIx is used in Slave mode.
bit 8
CKE: SPIx Clock Edge Select bit(3)
1 = Serial output data changes on transition from active clock state to Idle clock state (see bit 6)
0 = Serial output data changes on transition from Idle clock state to active clock state (see bit 6)
bit 7
SSEN: Slave Select Enable (Slave mode) bit(4)
1 = SSx pin is used for Slave mode
0 = SSx pin is not used by module; pin is controlled by port function
bit 6
CKP: Clock Polarity Select bit
1 = Idle state for clock is a high level; active state is a low level
0 = Idle state for clock is a low level; active state is a high level
bit 5
MSTEN: Master Mode Enable bit
1 = Master mode
0 = Slave mode
Note 1:
2:
3:
4:
If DISSCK = 0, SCKx must be configured to an available RPn pin. See Section 10.4 “Peripheral Pin
Select (PPS)” for more information.
If DISSDO = 0, SDOx must be configured to an available RPn pin. See Section 10.4 “Peripheral Pin
Select (PPS)” for more information.
The CKE bit is not used in the Framed SPI modes. The user should program this bit to ‘0’ for the Framed
SPI modes (FRMEN = 1).
If SSEN = 1, SSx must be configured to an available RPn pin. See Section 10.4 “Peripheral Pin Select
(PPS)” for more information.
DS39951C-page 170
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 15-2:
SPIXCON1: SPIx CONTROL REGISTER 1 (CONTINUED)
bit 4-2
SPRE<2:0>: Secondary Prescale bits (Master mode)
111 = Secondary prescale 1:1
110 = Secondary prescale 2:1
...
000 = Secondary prescale 8:1
bit 1-0
PPRE<1:0>: Primary Prescale bits (Master mode)
11 = Primary prescale 1:1
10 = Primary prescale 4:1
01 = Primary prescale 16:1
00 = Primary prescale 64:1
Note 1:
2:
3:
4:
If DISSCK = 0, SCKx must be configured to an available RPn pin. See Section 10.4 “Peripheral Pin
Select (PPS)” for more information.
If DISSDO = 0, SDOx must be configured to an available RPn pin. See Section 10.4 “Peripheral Pin
Select (PPS)” for more information.
The CKE bit is not used in the Framed SPI modes. The user should program this bit to ‘0’ for the Framed
SPI modes (FRMEN = 1).
If SSEN = 1, SSx must be configured to an available RPn pin. See Section 10.4 “Peripheral Pin Select
(PPS)” for more information.
REGISTER 15-3:
SPIxCON2: SPIx CONTROL REGISTER 2
R/W-0
R/W-0
R/W-0
U-0
U-0
U-0
U-0
U-0
FRMEN
SPIFSD
SPIFPOL
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
—
—
—
—
—
—
SPIFE
SPIBEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
FRMEN: Framed SPIx Support bit
1 = Framed SPIx support is enabled
0 = Framed SPIx support is disabled
bit 14
SPIFSD: Frame Sync Pulse Direction Control on SSx Pin bit
1 = Frame sync pulse input (slave)
0 = Frame sync pulse output (master)
bit 13
SPIFPOL: Frame Sync Pulse Polarity bit (Frame mode only)
1 = Frame sync pulse is active-high
0 = Frame sync pulse is active-low
bit 12-2
Unimplemented: Read as ‘0’
bit 1
SPIFE: Frame Sync Pulse Edge Select bit
1 = Frame sync pulse coincides with the first bit clock
0 = Frame sync pulse precedes the first bit clock
bit 0
SPIBEN: Enhanced Buffer Enable bit
1 = Enhanced buffer is enabled
0 = Enhanced buffer is disabled (Legacy mode)
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 171
PIC24FJ64GA104 FAMILY
FIGURE 15-3:
SPI MASTER/SLAVE CONNECTION (STANDARD MODE)
PROCESSOR 1 (SPI Master)
PROCESSOR 2 (SPI Slave)
SDIx
SDOx
Serial Receive Buffer
(SPIxRXB)
Serial Receive Buffer
(SPIxRXB)
SDOx
SDIx
Shift Register
(SPIxSR)
LSb
MSb
MSb
Serial Transmit Buffer
(SPIxTXB)
SPIx Buffer
(SPIxBUF)(2)
Shift Register
(SPIxSR)
LSb
Serial Transmit Buffer
(SPIxTXB)
SCKx
Serial Clock
SCKx
SPIx Buffer
(SPIxBUF)(2)
SSx(1)
SSEN (SPIxCON1<7>) = 1 and MSTEN (SPIxCON1<5>) = 0
MSTEN (SPIxCON1<5>) = 1)
Note
1:
2:
FIGURE 15-4:
Using the SSx pin in Slave mode of operation is optional.
User must write transmit data to read received data from SPIxBUF. The SPIxTXB and SPIxRXB registers are memory
mapped to SPIxBUF.
SPI MASTER/SLAVE CONNECTION (ENHANCED BUFFER MODES)
PROCESSOR 1 (SPI Enhanced Buffer Master)
Shift Register
(SPIxSR)
PROCESSOR 2 (SPI Enhanced Buffer Slave)
SDOx
SDIx
SDIx
SDOx
LSb
MSb
MSb
8-Level FIFO Buffer
SPIx Buffer
(SPIxBUF)(2)
Note
1:
2:
LSb
8-Level FIFO Buffer
SCKx
SSx
MSTEN (SPIxCON1<5>) = 1 and
SPIBEN (SPIxCON2<0>) = 1
Shift Register
(SPIxSR)
Serial Clock
SCKx
SPIx Buffer
(SPIxBUF)(2)
SSx(1)
SSEN (SPIxCON1<7>) = 1,
MSTEN (SPIxCON1<5>) = 0 and
SPIBEN (SPIxCON2<0>) = 1
Using the SSx pin in Slave mode of operation is optional.
User must write transmit data to read received data from SPIxBUF. The SPIxTXB and SPIxRXB registers are memory
mapped to SPIxBUF.
DS39951C-page 172
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
FIGURE 15-5:
SPI MASTER, FRAME MASTER CONNECTION DIAGRAM
PIC24F
(SPI Master, Frame Master)
PROCESSOR 2
SDIx
SDOx
SDOx
SDIx
SCKx
SSx
FIGURE 15-6:
Serial Clock
Frame Sync
Pulse
SCKx
SSx
SPI MASTER, FRAME SLAVE CONNECTION DIAGRAM
PIC24F
SPI Master, Frame Slave)
PROCESSOR 2
SDOx
SDIx
SDIx
SDOx
SCKx
SSx
FIGURE 15-7:
Serial Clock
Frame Sync
Pulse
SCKx
SSx
SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM
PIC24F
(SPI Slave, Frame Master)
PROCESSOR 2
SDOx
SDIx
SDIx
SDOx
SCKx
SSx
FIGURE 15-8:
Serial Clock
Frame Sync.
Pulse
SCKx
SSx
SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM
PIC24F
(SPI Slave, Frame Slave)
PROCESSOR 2
SDIx
SDOx
SDOx
SDIx
SCKx
SSx
 2010 Microchip Technology Inc.
Serial Clock
Frame Sync
Pulse
SCKx
SSx
DS39951C-page 173
PIC24FJ64GA104 FAMILY
EQUATION 15-1:
RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED(1)
FSCK =
FCY
Primary Prescaler * Secondary Prescaler
Note 1: Based on FCY = FOSC/2, Doze mode and PLL are disabled.
TABLE 15-1:
SAMPLE SCK FREQUENCIES(1,2)
Secondary Prescaler Settings
FCY = 16 MHz
Primary Prescaler Settings
1:1
2:1
4:1
6:1
8:1
1:1
Invalid
8000
4000
2667
2000
4:1
4000
2000
1000
667
500
16:1
1000
500
250
167
125
64:1
250
125
63
42
31
1:1
5000
2500
1250
833
625
FCY = 5 MHz
Primary Prescaler Settings
Note 1:
2:
4:1
1250
625
313
208
156
16:1
313
156
78
52
39
64:1
78
39
20
13
10
Based on FCY = FOSC/2, Doze mode and PLL are disabled.
SCKx frequencies are shown in kHz.
DS39951C-page 174
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
16.0
Note:
INTER-INTEGRATED CIRCUIT
(I2C™)
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 24. “Inter-Integrated Circuit™
(I2C™)” (DS39702).
The Inter-Integrated Circuit (I2C) module is a serial
interface useful for communicating with other peripheral
or microcontroller devices. These peripheral devices
may be serial EEPROMs, display drivers, A/D
Converters, etc.
The I
•
•
•
•
•
•
•
•
•
2C
module supports these features:
Independent master and slave logic
7-bit and 10-bit device addresses
General call address as defined in the I2C protocol
Clock stretching to provide delays for the
processor to respond to a slave data request
Both 100 kHz and 400 kHz bus specifications.
Configurable address masking
Multi-Master modes to prevent loss of messages
in arbitration
Bus Repeater mode, allowing the acceptance of
all messages as a slave regardless of the address
Automatic SCL
16.1
The details of sending a message in Master mode
depends on the communications protocol for the device
being communicated with. Typically, the sequence of
events is as follows:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
A block diagram of the module is shown in Figure 16-1.
13.
 2010 Microchip Technology Inc.
Communicating as a Master in a
Single Master Environment
Assert a Start condition on SDAx and SCLx.
Send the I 2C device address byte to the slave
with a write indication.
Wait for and verify an Acknowledge from the
slave.
Send the first data byte (sometimes known as
the command) to the slave.
Wait for and verify an Acknowledge from the
slave.
Send the serial memory address low byte to the
slave.
Repeat steps 4 and 5 until all data bytes are
sent.
Assert a Repeated Start condition on SDAx and
SCLx.
Send the device address byte to the slave with
a read indication.
Wait for and verify an Acknowledge from the
slave.
Enable master reception to receive serial
memory data.
Generate an ACK or NACK condition at the end
of a received byte of data.
Generate a Stop condition on SDAx and SCLx.
DS39951C-page 175
PIC24FJ64GA104 FAMILY
FIGURE 16-1:
I2C™ BLOCK DIAGRAM
Internal
Data Bus
I2CxRCV
SCLx
Read
Shift
Clock
I2CxRSR
LSB
SDAx
Address Match
Match Detect
Write
I2CxMSK
Write
Read
I2CxADD
Read
Start and Stop
Bit Detect
Write
Start and Stop
Bit Generation
Control Logic
I2CxSTAT
Collision
Detect
Read
Write
I2CxCON
Acknowledge
Generation
Read
Clock
Stretching
Write
I2CxTRN
LSB
Read
Shift Clock
Reload
Control
BRG Down Counter
Write
I2CxBRG
Read
TCY/2
DS39951C-page 176
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
16.2
Setting Baud Rate When
Operating as a Bus Master
16.3
The I2CxMSK register (Register 16-3) designates
address bit positions as “don’t care” for both 7-Bit and
10-Bit Addressing modes. Setting a particular bit location (= 1) in the I2CxMSK register causes the slave
module to respond whether the corresponding address
bit value is a ‘0’ or a ‘1’. For example, when I2CxMSK
is set to ‘00100000’, the slave module will detect both
addresses: ‘0000000’ and ‘0100000’.
To compute the Baud Rate Generator (BRG) reload
value, use Equation 16-1.
EQUATION 16-1:
COMPUTING BAUD RATE
RELOAD VALUE(1,2)
FCY
FSCL = ---------------------------------------------------------------------FCY
I2CxBRG + 1 + -----------------------------10 000 000
or
FCY
FCY
I2CxBRG =  ------------ – ------------------------------ – 1
FSCL 10 000 000
To enable address masking, the IPMI (Intelligent
Peripheral Management Interface) must be disabled by
clearing the IPMIEN bit (I2CxCON<11>).
Note 1: Based on FCY = FOSC/2, Doze mode and
PLL are disabled.
2: These clock rate values are for guidance
only. The actual clock rate can be affected
by various system level parameters. The
actual clock rate should be measured in
its intended application.
TABLE 16-1:
Slave Address Masking
Note:
As a result of changes in the I2C™ protocol, the addresses in Table 16-2 are
reserved and will not be Acknowledged in
Slave mode. This includes any address
mask settings that include any of these
addresses.
I2C™ CLOCK RATES(1,2)
Required System FSCL
FCY
100 kHz
100 kHz
100 kHz
I2CxBRG Value
Actual FSCL
(Decimal)
(Hexadecimal)
16 MHz
157
9D
100 kHz
8 MHz
4 MHz
78
39
4E
27
100 kHz
99 kHz
400 kHz
400 kHz
16 MHz
8 MHz
37
18
25
12
404 kHz
404 kHz
400 kHz
400 kHz
4 MHz
2 MHz
9
4
9
4
385 kHz
385 kHz
1 MHz
1 MHz
16 MHz
8 MHz
13
6
D
6
1.026 MHz
1.026 MHz
1 MHz
4 MHz
3
3
0.909 MHz
Note 1: Based on FCY = FOSC/2, Doze mode and PLL are disabled.
2: These clock rate values are for guidance only. The actual clock rate can be affected by various system
level parameters. The actual clock rate should be measured in its intended application.
TABLE 16-2:
Slave Address
I2C™ RESERVED ADDRESSES(1)
R/W Bit
Description
Address(2)
0000 000
0
General Call
0000 000
1
Start Byte
0000 001
x
Cbus Address
0000 010
x
Reserved
0000 011
x
Reserved
0000 1xx
x
HS Mode Master Code
1111 1xx
x
Reserved
1111 0xx
x
10-Bit Slave Upper Byte(3)
Note 1:
2:
3:
The address bits listed here will never cause an address match, independent of address mask settings.
The address will be Acknowledged only if GCEN = 1.
A match on this address can only occur on the upper byte in 10-Bit Addressing mode.
 2010 Microchip Technology Inc.
DS39951C-page 177
PIC24FJ64GA104 FAMILY
REGISTER 16-1:
I2CxCON: I2Cx CONTROL REGISTER
R/W-0
U-0
R/W-0
R/W-1, HC
R/W-0
R/W-0
R/W-0
R/W-0
I2CEN
—
I2CSIDL
SCLREL
IPMIEN
A10M
DISSLW
SMEN
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0, HC
R/W-0, HC
R/W-0, HC
R/W-0, HC
R/W-0, HC
GCEN
STREN
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
bit 7
bit 0
Legend:
HC = Hardware Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
I2CEN: I2Cx Enable bit
1 = Enables the I2Cx module, and configures the SDAx and SCLx pins as serial port pins
0 = Disables the I2Cx module. All I2C pins are controlled by port functions.
bit 14
Unimplemented: Read as ‘0’
bit 13
I2CSIDL: Stop in Idle Mode bit
1 = Discontinues module operation when device enters an Idle mode
0 = Continues module operation in Idle mode
bit 12
SCLREL: SCLx Release Control bit (when operating as I2C Slave)
1 = Releases SCLx clock
0 = Holds SCLx clock low (clock stretch)
If STREN = 1:
Bit is R/W (i.e., software may write ‘0’ to initiate stretch and write ‘1’ to release clock). Hardware clear
at beginning of slave transmission. Hardware clear at end of slave reception.
If STREN = 0:
Bit is R/S (i.e., software may only write ‘1’ to release clock). Hardware clear at beginning of slave
transmission.
bit 11
IPMIEN: Intelligent Platform Management Interface (IPMI) Enable bit
1 = IPMI Support mode is enabled; all addresses Acknowledged
0 = IPMI mode is disabled
bit 10
A10M: 10-Bit Slave Addressing bit
1 = I2CxADD is a 10-bit slave address
0 = I2CxADD is a 7-bit slave address
bit 9
DISSLW: Disable Slew Rate Control bit
1 = Slew rate control is disabled
0 = Slew rate control is enabled
bit 8
SMEN: SMBus Input Levels bit
1 = Enables I/O pin thresholds compliant with the SMBus specification
0 = Disables the SMBus input thresholds
bit 7
GCEN: General Call Enable bit (when operating as I2C slave)
1 = Enables interrupt when a general call address is received in the I2CxRSR
(module is enabled for reception)
0 = General call address is disabled
bit 6
STREN: SCLx Clock Stretch Enable bit (when operating as I2C slave)
Used in conjunction with the SCLREL bit.
1 = Enables software or receive clock stretching
0 = Disables software or receive clock stretching
DS39951C-page 178
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 16-1:
I2CxCON: I2Cx CONTROL REGISTER (CONTINUED)
bit 5
ACKDT: Acknowledge Data bit (When operating as I2C master. Applicable during master receive.)
Value that will be transmitted when the software initiates an Acknowledge sequence.
1 = Sends NACK during Acknowledge
0 = Sends ACK during Acknowledge
bit 4
ACKEN: Acknowledge Sequence Enable bit
(When operating as I2C master. Applicable during master receive.)
1 = Initiates Acknowledge sequence on SDAx and SCLx pins and transmits ACKDT data bit. Hardware
clear at end of master Acknowledge sequence.
0 = Acknowledge sequence is not in progress
bit 3
RCEN: Receive Enable bit (when operating as I2C master)
1 = Enables Receive mode for I2C. Hardware clear at end of eighth bit of master receive data byte.
0 = Receive sequence is not in progress
bit 2
PEN: Stop Condition Enable bit (when operating as I2C master)
1 = Initiates Stop condition on SDAx and SCLx pins. Hardware clear at end of master Stop sequence.
0 = Stop condition is not in progress
bit 1
RSEN: Repeated Start Condition Enabled bit (when operating as I2C master)
1 = Initiates Repeated Start condition on SDAx and SCLx pins. Hardware clear at end of master
Repeated Start sequence.
0 = Repeated Start condition is not in progress
bit 0
SEN: Start Condition Enabled bit (when operating as I2C master)
1 = Initiates Start condition on SDAx and SCLx pins. Hardware clear at end of master Start sequence.
0 = Start condition is not in progress
 2010 Microchip Technology Inc.
DS39951C-page 179
PIC24FJ64GA104 FAMILY
REGISTER 16-2:
I2CxSTAT: I2Cx STATUS REGISTER
R-0, HSC R-0, HSC
U-0
U-0
U-0
R/C-0, HS
R-0, HSC
R-0, HSC
ACKSTAT TRSTAT
—
—
—
BCL
GCSTAT
ADD10
bit 15
bit 8
R/C-0, HS R/C-0, HS R-0, HSC R/C-0, HSC
IWCOL
I2COV
D/A
P
R/C-0, HSC
R-0, HSC
R-0, HSC
R-0, HSC
S
R/W
RBF
TBF
bit 7
bit 0
Legend:
C = Clearable bit
HS = Hardware Settable bit
HSC = Hardware Settable/Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
ACKSTAT: Acknowledge Status bit
1 = NACK was detected last
0 = ACK was detected last
Hardware set or clear at end of Acknowledge.
bit 14
TRSTAT: Transmit Status bit
(When operating as I2C master. Applicable to master transmit operation.)
1 = Master transmit is in progress (8 bits + ACK)
0 = Master transmit is not in progress
Hardware set at the beginning of master transmission. Hardware clear at the end of slave Acknowledge.
bit 13-11
Unimplemented: Read as ‘0’
bit 10
BCL: Master Bus Collision Detect bit
1 = A bus collision has been detected during a master operation
0 = No collision
Hardware set at detection of bus collision.
bit 9
GCSTAT: General Call Status bit
1 = General call address was received
0 = General call address was not received
Hardware set when the address matches the general call address. Hardware clear at Stop detection.
bit 8
ADD10: 10-Bit Address Status bit
1 = 10-bit address was matched
0 = 10-bit address was not matched
Hardware set at the match of 2nd byte of matched 10-bit address. Hardware clear at Stop detection.
bit 7
IWCOL: Write Collision Detect bit
1 = An attempt to write to the I2CxTRN register failed because the I2C module is busy
0 = No collision
Hardware set at occurrence of write to I2CxTRN while busy (cleared by software).
bit 6
I2COV: Receive Overflow Flag bit
1 = A byte was received while the I2CxRCV register was still holding the previous byte
0 = No overflow
Hardware set at attempt to transfer I2CxRSR to I2CxRCV (cleared by software).
bit 5
D/A: Data/Address bit (when operating as I2C slave)
1 = Indicates that the last byte received was data
0 = Indicates that the last byte received was the the device address
Hardware clear occurs at device address match. Hardware set after a transmission finishes or at reception
of a slave byte.
DS39951C-page 180
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 16-2:
I2CxSTAT: I2Cx STATUS REGISTER (CONTINUED)
bit 4
P: Stop bit
1 = Indicates that a Stop bit has been detected last
0 = Stop bit was not detected last
Hardware set or clear when Start, Repeated Start or Stop is detected.
bit 3
S: Start bit
1 = Indicates that a Start (or Repeated Start) bit has been detected last
0 = Start bit was not detected last
Hardware set or clear when Start, Repeated Start or Stop is detected.
bit 2
R/W: Read/Write Information bit (when operating as I2C slave)
1 = Read – indicates data transfer is output from the slave
0 = Write – indicates data transfer is input to the slave
Hardware set or clear after reception of I 2C device address byte.
bit 1
RBF: Receive Buffer Full Status bit
1 = Receive is complete, I2CxRCV is full
0 = Receive is not complete, I2CxRCV is empty
Hardware set when I2CxRCV is written with received byte. Hardware clear when software reads I2CxRCV.
bit 0
TBF: Transmit Buffer Full Status bit
1 = Transmit is in progress, I2CxTRN is full
0 = Transmit is complete, I2CxTRN is empty
Hardware set when software writes I2CxTRN. Hardware clear at completion of data transmission.
 2010 Microchip Technology Inc.
DS39951C-page 181
PIC24FJ64GA104 FAMILY
REGISTER 16-3:
I2CxMSK: I2Cx SLAVE MODE ADDRESS MASK REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
—
—
—
—
—
—
AMSK9
AMSK8
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
AMSK7
AMSK6
AMSK5
AMSK4
AMSK3
AMSK2
AMSK1
AMSK0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-10
Unimplemented: Read as ‘0’
bit 9-0
AMSK<9:0>: Mask for Address Bit x Select bits
1 = Enable masking for bit x of incoming message address; bit match is not required in this position
0 = Disable masking for bit x; bit match is required in this position
DS39951C-page 182
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
17.0
UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
Note:
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 21. “UART” (DS39708).
The Universal Asynchronous Receiver Transmitter
(UART) module is one of the serial I/O modules available
in the PIC24F device family. The UART is a full-duplex,
asynchronous system that can communicate with
peripheral devices, such as personal computers,
LIN/J2602, RS-232 and RS-485 interfaces. The module
also supports a hardware flow control option with the
UxCTS and UxRTS pins, and also includes an IrDA®
encoder and decoder.
The primary features of the UART module are:
• Full-Duplex, 8 or 9-Bit Data Transmission through
the UxTX and UxRX pins
• Even, Odd or No Parity Options (for 8-bit data)
• One or Two Stop bits
• Hardware Flow Control Option with UxCTS and
UxRTS pins
FIGURE 17-1:
• Fully Integrated Baud Rate Generator with 16-Bit
Prescaler
• Baud Rates Ranging from 1 Mbps to 15 bps at
16 MIPS
• 4-Deep, First-In-First-Out (FIFO) Transmit Data
Buffer
• 4-Deep FIFO Receive Data Buffer
• Parity, Framing and Buffer Overrun Error Detection
• Support for 9-Bit mode with Address Detect
(9th bit = 1)
• Transmit and Receive Interrupts
• Loopback mode for Diagnostic Support
• Support for Sync and Break Characters
• Supports Automatic Baud Rate Detection
• IrDA Encoder and Decoder Logic
• 16x Baud Clock Output for IrDA Support
A simplified block diagram of the UART is shown in
Figure 17-1. The UART module consists of these key
important hardware elements:
• Baud Rate Generator
• Asynchronous Transmitter
• Asynchronous Receiver
UART SIMPLIFIED BLOCK DIAGRAM
Baud Rate Generator
IrDA®
Hardware Flow Control
UxRTS/BCLKx
UxCTS
Note:
UARTx Receiver
UxRX
UARTx Transmitter
UxTX
The UART inputs and outputs must all be assigned to available RPn pins before use. Please see
Section 10.4 “Peripheral Pin Select (PPS)” for more information.
 2010 Microchip Technology Inc.
DS39951C-page 183
PIC24FJ64GA104 FAMILY
17.1
UART Baud Rate Generator (BRG)
The UART module includes a dedicated 16-bit Baud
Rate Generator. The UxBRG register controls the
period of a free-running, 16-bit timer. Equation 17-1
shows the formula for computation of the baud rate
with BRGH = 0.
EQUATION 17-1:
Baud Rate =
The maximum baud rate (BRGH = 0) possible is
FCY/16 (for UxBRG = 0) and the minimum baud rate
possible is FCY/(16 * 65536).
Equation 17-2 shows the formula for computation of
the baud rate with BRGH = 1.
EQUATION 17-2:
UART BAUD RATE WITH
BRGH = 0(1,2)
Baud Rate =
FCY
16 • (UxBRG + 1)
UxBRG =
UxBRG =
Note 1:
FCY
–1
16 • Baud Rate
FCY denotes the instruction cycle clock
frequency (FOSC/2).
Based on FCY = FOSC/2, Doze mode
and PLL are disabled.
2:
Example 17-1 shows the calculation of the baud rate
error for the following conditions:
• FCY = 4 MHz
• Desired Baud Rate = 9600
EXAMPLE 17-1:
Desired Baud Rate
UART BAUD RATE WITH
BRGH = 1(1,2)
Note 1:
2:
FCY
4 • (UxBRG + 1)
FCY
4 • Baud Rate
–1
FCY denotes the instruction cycle clock
frequency.
Based on FCY = FOSC/2, Doze mode
and PLL are disabled.
The maximum baud rate (BRGH = 1) possible is FCY/4
(for UxBRG = 0) and the minimum baud rate possible
is FCY/(4 * 65536).
Writing a new value to the UxBRG register causes the
BRG timer to be reset (cleared). This ensures the BRG
does not wait for a timer overflow before generating the
new baud rate.
BAUD RATE ERROR CALCULATION (BRGH = 0)(1)
= FCY/(16 (UxBRG + 1))
Solving for UxBRG Value:
UxBRG
UxBRG
UxBRG
= ((FCY/Desired Baud Rate)/16) – 1
= ((4000000/9600)/16) – 1
= 25
Calculated Baud Rate = 4000000/(16 (25 + 1))
= 9615
Error
Note 1:
= (Calculated Baud Rate – Desired Baud Rate)
Desired Baud Rate
= (9615 – 9600)/9600
= 0.16%
Based on FCY = FOSC/2, Doze mode and PLL are disabled.
DS39951C-page 184
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
17.2
1.
2.
3.
4.
5.
6.
Set up the UART:
a) Write appropriate values for data, parity and
Stop bits.
b) Write appropriate baud rate value to the
UxBRG register.
c) Set up transmit and receive interrupt enable
and priority bits.
Enable the UART.
Set the UTXEN bit (causes a transmit interrupt
two cycles after being set).
Write data byte to the lower byte of the
UxTXREG word. The value will be immediately
transferred to the Transmit Shift Register (TSR)
and the serial bit stream will start shifting out
with the next rising edge of the baud clock.
Alternately, the data byte may be transferred
while UTXEN = 0, and then the user may set
UTXEN. This will cause the serial bit stream to
begin immediately because the baud clock will
start from a cleared state.
A transmit interrupt will be generated as per
interrupt control bit, UTXISELx.
17.3
1.
2.
3.
4.
5.
6.
Transmitting in 8-Bit Data Mode
Transmitting in 9-Bit Data Mode
Set up the UART (as described in Section 17.2
“Transmitting in 8-Bit Data Mode”).
Enable the UART.
Set the UTXEN bit (causes a transmit interrupt).
Write UxTXREG as a 16-bit value only.
A word write to UxTXREG triggers the transfer
of the 9-bit data to the TSR. The serial bit stream
will start shifting out with the first rising edge of
the baud clock.
A transmit interrupt will be generated as per the
setting of control bit, UTXISELx.
17.4
Break and Sync Transmit
Sequence
The following sequence will send a message frame
header made up of a Break, followed by an Auto-Baud
Sync byte.
1.
2.
3.
4.
5.
Configure the UART for the desired mode.
Set UTXEN and UTXBRK to set up the Break
character.
Load the UxTXREG with a dummy character to
initiate transmission (value is ignored).
Write ‘55h’ to UxTXREG; this loads the Sync
character into the transmit FIFO.
After the Break has been sent, the UTXBRK bit
is reset by hardware. The Sync character now
transmits.
 2010 Microchip Technology Inc.
17.5
1.
2.
3.
4.
5.
Receiving in 8-Bit or 9-Bit Data
Mode
Set up the UART (as described in Section 17.2
“Transmitting in 8-Bit Data Mode”).
Enable the UART.
A receive interrupt will be generated when one
or more data characters have been received as
per interrupt control bit, URXISELx.
Read the OERR bit to determine if an overrun
error has occurred. The OERR bit must be reset
in software.
Read UxRXREG.
The act of reading the UxRXREG character will move
the next character to the top of the receive FIFO,
including a new set of PERR and FERR values.
17.6
Operation of UxCTS and UxRTS
Control Pins
UARTx Clear to Send (UxCTS) and Request to Send
(UxRTS) are the two hardware-controlled pins that are
associated with the UART module. These two pins
allow the UART to operate in Simplex and Flow Control
modes. They are implemented to control the transmission and reception between the Data Terminal
Equipment (DTE). The UEN<1:0> bits in the UxMODE
register configure these pins.
17.7
Infrared Support
The UART module provides two types of infrared UART
support: one is the IrDA clock output to support the
external IrDA encoder and decoder device (legacy
module support), and the other is the full implementation of the IrDA encoder and decoder. Note that
because the IrDA modes require a 16x baud clock, they
will only work when the BRGH bit (UxMODE<3>) is ‘0’.
17.7.1
IRDA CLOCK OUTPUT FOR
EXTERNAL IRDA SUPPORT
To support external IrDA encoder and decoder devices,
the BCLKx pin (same as the UxRTS pin) can be
configured to generate the 16x baud clock. When
UEN<1:0> = 11, the BCLKx pin will output the 16x
baud clock if the UART module is enabled. It can be
used to support the IrDA codec chip.
17.7.2
BUILT-IN IRDA ENCODER AND
DECODER
The UART has full implementation of the IrDA encoder
and decoder as part of the UART module. The built-in
IrDA encoder and decoder functionality is enabled
using the IREN bit (UxMODE<12>). When enabled
(IREN = 1), the receive pin (UxRX) acts as the input
from the infrared receiver. The transmit pin (UxTX) acts
as the output to the infrared transmitter.
DS39951C-page 185
PIC24FJ64GA104 FAMILY
REGISTER 17-1:
R/W-0
UxMODE: UARTx MODE REGISTER
U-0
(1)
UARTEN
—
R/W-0
USIDL
R/W-0
IREN
(2)
R/W-0
U-0
R/W-0
R/W-0
RTSMD
—
UEN1
UEN0
bit 15
bit 8
R/W-0, HC
R/W-0
R/W-0, HC
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
WAKE
LPBACK
ABAUD
RXINV
BRGH
PDSEL1
PDSEL0
STSEL
bit 7
bit 0
Legend:
HC = Hardware Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
UARTEN: UARTx Enable bit(1)
1 = UARTx is enabled; all UARTx pins are controlled by UARTx as defined by UEN<1:0>
0 = UARTx is disabled; all UARTx pins are controlled by port latches; UARTx power consumption is minimal
bit 14
Unimplemented: Read as ‘0’
bit 13
USIDL: Stop in Idle Mode bit
1 = Discontinue module operation when the device enters Idle mode
0 = Continue module operation in Idle mode
bit 12
IREN: IrDA® Encoder and Decoder Enable bit(2)
1 = IrDA encoder and decoder are enabled
0 = IrDA encoder and decoder are disabled
bit 11
RTSMD: Mode Selection for UxRTS Pin bit
1 = UxRTS pin is in Simplex mode
0 = UxRTS pin is in Flow Control mode
bit 10
Unimplemented: Read as ‘0’
bit 9-8
UEN<1:0>: UARTx Enable bits
11 = UxTX, UxRX and BCLKx pins are enabled and used; UxCTS pin is controlled by port latches
10 = UxTX, UxRX, UxCTS and UxRTS pins are enabled and used
01 = UxTX, UxRX and UxRTS pins are enabled and used; UxCTS pin is controlled by port latches
00 = UxTX and UxRX pins are enabled and used; UxCTS and UxRTS/BCLKx pins are controlled by
port latches
bit 7
WAKE: Wake-up on Start Bit Detect During Sleep Mode Enable bit
1 = UARTx will continue to sample the UxRX pin; interrupt generated on falling edge; bit cleared in
hardware on following rising edge
0 = No wake-up is enabled
bit 6
LPBACK: UARTx Loopback Mode Select bit
1 = Enable Loopback mode
0 = Loopback mode is disabled
bit 5
ABAUD: Auto-Baud Enable bit
1 = Enable baud rate measurement on the next character – requires reception of a Sync field (55h);
cleared in hardware upon completion
0 = Baud rate measurement is disabled or completed
bit 4
RXINV: Receive Polarity Inversion bit
1 = UxRX Idle state is ‘0’
0 = UxRX Idle state is ‘1’
Note 1:
2:
If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn pin. See
Section 10.4 “Peripheral Pin Select (PPS)” for more information.
This feature is only available for the 16x BRG mode (BRGH = 0).
DS39951C-page 186
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 17-1:
UxMODE: UARTx MODE REGISTER (CONTINUED)
bit 3
BRGH: High Baud Rate Enable bit
1 = High-Speed mode (four BRG clock cycles per bit)
0 = Standard mode (16 BRG clock cycles per bit)
bit 2-1
PDSEL<1:0>: Parity and Data Selection bits
11 = 9-bit data, no parity
10 = 8-bit data, odd parity
01 = 8-bit data, even parity
00 = 8-bit data, no parity
bit 0
STSEL: Stop Bit Selection bit
1 = Two Stop bits
0 = One Stop bit
Note 1:
2:
If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn pin. See
Section 10.4 “Peripheral Pin Select (PPS)” for more information.
This feature is only available for the 16x BRG mode (BRGH = 0).
 2010 Microchip Technology Inc.
DS39951C-page 187
PIC24FJ64GA104 FAMILY
REGISTER 17-2:
UxSTA: UARTx STATUS AND CONTROL REGISTER
R/W-0
R/W-0
R/W-0
U-0
R/W-0, HC
R/W-0
R-0
R-1
UTXISEL1
UTXINV(1)
UTXISEL0
—
UTXBRK
UTXEN(2)
UTXBF
TRMT
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R-1
R-0
R-0
R/C-0
R-0
URXISEL1
URXISEL0
ADDEN
RIDLE
PERR
FERR
OERR
URXDA
bit 7
bit 0
Legend:
C = Clearable bit
HC = Hardware Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15,13
UTXISEL<1:0>: Transmission Interrupt Mode Selection bits
11 = Reserved; do not use
10 = Interrupt when a character is transferred to the Transmit Shift Register (TSR), and as a result,
the transmit buffer becomes empty
01 = Interrupt when the last character is shifted out of the Transmit Shift Register; all transmit
operations are completed
00 = Interrupt when a character is transferred to the Transmit Shift Register (this implies there is at
least one character open in the transmit buffer)
bit 14
UTXINV: IrDA® Encoder Transmit Polarity Inversion bit(1)
IREN = 0:
1 = UxTX Idle ‘0’
0 = UxTX Idle ‘1’
IREN = 1:
1 = UxTX Idle ‘1’
0 = UxTX Idle ‘0’
bit 12
Unimplemented: Read as ‘0’
bit 11
UTXBRK: Transmit Break bit
1 = Send Sync Break on next transmission – Start bit, followed by twelve ‘0’ bits, followed by Stop bit;
cleared by hardware upon completion
0 = Sync Break transmission is disabled or completed
bit 10
UTXEN: Transmit Enable bit(2)
1 = Transmit is enabled, UxTX pin is controlled by UARTx
0 = Transmit is disabled, any pending transmission is aborted and the buffer is reset; UxTX pin is
controlled by port
bit 9
UTXBF: Transmit Buffer Full Status bit (read-only)
1 = Transmit buffer is full
0 = Transmit buffer is not full; at least one more character can be written
bit 8
TRMT: Transmit Shift Register Empty bit (read-only)
1 = Transmit Shift Register is empty and transmit buffer is empty (the last transmission has completed)
0 = Transmit Shift Register is not empty, a transmission is in progress or queued
bit 7-6
URXISEL<1:0>: Receive Interrupt Mode Selection bits
11 = Interrupt is set on RSR transfer, making the receive buffer full (i.e., has 4 data characters)
10 = Interrupt is set on RSR transfer, making the receive buffer 3/4 full (i.e., has 3 data characters)
0x = Interrupt is set when any character is received and transferred from the RSR to the receive buffer;
receive buffer has one or more characters
Note 1:
2:
Value of bit only affects the transmit properties of the module when the IrDA encoder is enabled (IREN = 1).
If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn pin. See
Section 10.4 “Peripheral Pin Select (PPS)” for more information.
DS39951C-page 188
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 17-2:
UxSTA: UARTx STATUS AND CONTROL REGISTER (CONTINUED)
bit 5
ADDEN: Address Character Detect bit (bit 8 of received data = 1)
1 = Address Detect mode is enabled. If 9-bit mode is not selected, this does not take effect.
0 = Address Detect mode is disabled
bit 4
RIDLE: Receiver Idle bit (read-only)
1 = Receiver is Idle
0 = Receiver is active
bit 3
PERR: Parity Error Status bit (read-only)
1 = Parity error has been detected for the current character (character at the top of the receive FIFO)
0 = Parity error has not been detected
bit 2
FERR: Framing Error Status bit (read-only)
1 = Framing error has been detected for the current character (character at the top of the receive FIFO)
0 = Framing error has not been detected
bit 1
OERR: Receive Buffer Overrun Error Status bit (clear/read-only)
1 = Receive buffer has overflowed
0 = Receive buffer has not overflowed (clearing a previously set OERR bit (1  0 transition) will reset
the receiver buffer and the RSR to the empty state
bit 0
URXDA: Receive Buffer Data Available bit (read-only)
1 = Receive buffer has data, at least one more character can be read
0 = Receive buffer is empty
Note 1:
2:
Value of bit only affects the transmit properties of the module when the IrDA encoder is enabled (IREN = 1).
If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn pin. See
Section 10.4 “Peripheral Pin Select (PPS)” for more information.
 2010 Microchip Technology Inc.
DS39951C-page 189
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 190
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
18.0
PARALLEL MASTER PORT
(PMP)
Note:
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 13. “Parallel Master Port
(PMP)” (DS39713).
The Parallel Master Port (PMP) module is a parallel,
8-bit I/O module, specifically designed to communicate
with a wide variety of parallel devices, such as communication peripherals, LCDs, external memory devices
and microcontrollers. Because the interface to parallel
peripherals varies significantly, the PMP is highly
configurable.
Note:
Key features of the PMP module include:
• Up to 16 Programmable Address Lines
• One Chip Select Line
• Programmable Strobe Options:
- Individual Read and Write Strobes or;
- Read/Write Strobe with Enable Strobe
• Address Auto-Increment/Auto-Decrement
• Programmable Address/Data Multiplexing
• Programmable Polarity on Control Signals
• Legacy Parallel Slave Port Support
• Enhanced Parallel Slave Support:
- Address Support
- 4-Byte Deep Auto-Incrementing Buffer
• Programmable Wait States
• Selectable Input Voltage Levels
A number of the pins for the PMP are not
present on PIC24FJ64GA1 family devices.
Refer to the specific device’s pinout to
determine which pins are available.
FIGURE 18-1:
PMP MODULE OVERVIEW
Address Bus
Data Bus
Control Lines
PIC24F
Parallel Master Port
PMA<0>
PMALL
PMA<1>
PMALH
(1)
Up to 11-Bit Address
PMA<10:2>
EEPROM
PMCS1
PMBE
PMRD
PMRD/PMWR
Microcontroller
LCD
FIFO
Buffer
PMWR
PMENB
PMD<7:0>
PMA<7:0>
PMA<15:8>
Note 1:
8-Bit Data
PMA<10:2> bits are not available on 28-pin devices.
 2010 Microchip Technology Inc.
DS39951C-page 191
PIC24FJ64GA104 FAMILY
REGISTER 18-1:
PMCON: PARALLEL PORT CONTROL REGISTER
R/W-0
U-0
R/W-0
PMPEN
—
PSIDL
R/W-0
R/W-0
ADRMUX1(1) ADRMUX0(1)
R/W-0
R/W-0
R/W-0
PTBEEN
PTWREN
PTRDEN
bit 15
bit 8
R/W-0
R/W-0
R/W-0(2)
U-0
R/W-0(2)
R/W-0
R/W-0
R/W-0
CSF1
CSF0
ALP
—
CS1P
BEP
WRSP
RDSP
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
PMPEN: Parallel Master Port Enable bit
1 = PMP is enabled
0 = PMP is disabled, no off-chip access performed
bit 14
Unimplemented: Read as ‘0’
bit 13
PSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-11
ADRMUX<1:0>: Address/Data Multiplexing Selection bits(1)
11 = Reserved
10 = All 16 bits of address are multiplexed on PMD<7:0> pins
01 = Lower 8 bits of address are multiplexed on PMD<7:0> pins; upper 3 bits are multiplexed on
PMA<10:8>
00 = Address and data appear on separate pins
bit 10
PTBEEN: Byte Enable Port Enable bit (16-Bit Master mode)
1 = PMBE port is enabled
0 = PMBE port is disabled
bit 9
PTWREN: Write Enable Strobe Port Enable bit
1 = PMWR/PMENB port is enabled
0 = PMWR/PMENB port is disabled
bit 8
PTRDEN: Read/Write Strobe Port Enable bit
1 = PMRD/PMWR port is enabled
0 = PMRD/PMWR port is disabled
bit 7-6
CSF<1:0>: Chip Select Function bits
11 = Reserved
10 = PMCS1 functions as chip set
01 = Reserved
00 = Reserved
bit 5
ALP: Address Latch Polarity bit(2)
1 = Active-high (PMALL and PMALH)
0 = Active-low (PMALL and PMALH)
bit 4
Unimplemented: Read as ‘0’
bit 3
CS1P: Chip Select 1 Polarity bit(2)
1 = Active-high (PMCS1/PMCS1)
0 = Active-low (PMCS1/PMCS1)
Note 1:
2:
PMA<10:2> bits are not available on 28-pin devices.
These bits have no effect when their corresponding pins are used as address lines.
DS39951C-page 192
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 18-1:
PMCON: PARALLEL PORT CONTROL REGISTER (CONTINUED)
bit 2
BEP: Byte Enable Polarity bit
1 = Byte enable active-high (PMBE)
0 = Byte enable active-low (PMBE)
bit 1
WRSP: Write Strobe Polarity bit
For Slave modes and Master Mode 2 (PMMODE<9:8> = 00,01,10):
1 = Write strobe active-high (PMWR)
0 = Write strobe active-low (PMWR)
For Master Mode 1 (PMMODE<9:8> = 11):
1 = Enable strobe active-high (PMENB)
0 = Enable strobe active-low (PMENB)
bit 0
RDSP: Read Strobe Polarity bit
For Slave modes and Master Mode 2 (PMMODE<9:8> = 00,01,10):
1 = Read strobe active-high (PMRD)
0 = Read strobe active-low (PMRD)
For Master Mode 1 (PMMODE<9:8> = 11):
1 = Read/write strobe active-high (PMRD/PMWR)
0 = Read/write strobe active-low (PMRD/PMWR)
Note 1:
2:
PMA<10:2> bits are not available on 28-pin devices.
These bits have no effect when their corresponding pins are used as address lines.
 2010 Microchip Technology Inc.
DS39951C-page 193
PIC24FJ64GA104 FAMILY
REGISTER 18-2:
PMMODE: PARALLEL PORT MODE REGISTER
R-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
BUSY
IRQM1
IRQM0
INCM1
INCM0
MODE16
MODE1
MODE0
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
WAITB1(1)
WAITB0(1)
WAITM3
WAITM2
WAITM1
WAITM0
WAITE1(1)
WAITE0(1)
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
BUSY: Busy bit (Master mode only)
1 = Port is busy (not useful when the processor stall is active)
0 = Port is not busy
bit 14-13
IRQM<1:0>: Interrupt Request Mode bits
11 = Interrupt generated when Read Buffer 3 is read or Write Buffer 3 is written (Buffered PSP mode),
or on a read or write operation when PMA<1:0> = 11 (Addressable PSP mode only)
10 = No interrupt is generated, processor stall activated
01 = Interrupt is generated at the end of the read/write cycle
00 = No interrupt is generated
bit 12-11
INCM<1:0>: Increment Mode bits
11 = PSP read and write buffers auto-increment (Legacy PSP mode only)
10 = Decrement ADDR<10:0> by 1 every read/write cycle
01 = Increment ADDR<10:0> by 1 every read/write cycle
00 = No increment or decrement of address
bit 10
MODE16: 8/16-Bit Mode bit
1 = 16-bit mode: Data register is 16 bits; a read or write to the Data register invokes two 8-bit transfers
0 = 8-bit mode: Data register is 8 bits; a read or write to the Data register invokes one 8-bit transfer
bit 9-8
MODE<1:0>: Parallel Port Mode Select bits
11 = Master Mode 1 (PMCS1, PMRD/PMWR, PMENB, PMBE, PMA<x:0> and PMD<7:0>)
10 = Master Mode 2 (PMCS1, PMRD, PMWR, PMBE, PMA<x:0> and PMD<7:0>)
01 = Enhanced PSP control signals (PMRD, PMWR, PMCS1, PMD<7:0> and PMA<1:0>)
00 = Legacy Parallel Slave Port control signals (PMRD, PMWR, PMCS1 and PMD<7:0>)
bit 7-6
WAITB<1:0>: Data Setup to Read/Write Wait State Configuration bits(1)
11 = Data wait of 4 TCY; multiplexed address phase of 4 TCY
10 = Data wait of 3 TCY; multiplexed address phase of 3 TCY
01 = Data wait of 2 TCY; multiplexed address phase of 2 TCY
00 = Data wait of 1 TCY; multiplexed address phase of 1 TCY
bit 5-2
WAITM<3:0>: Read to Byte Enable Strobe Wait State Configuration bits
1111 = Wait of additional 15 TCY
...
0001 = Wait of additional 1 TCY
0000 = No additional wait cycles (operation forced into one TCY)
bit 1-0
WAITE<1:0>: Data Hold After Strobe Wait State Configuration bits(1)
11 = Wait of 4 TCY
10 = Wait of 3 TCY
01 = Wait of 2 TCY
00 = Wait of 1 TCY
Note 1:
WAITB and WAITE bits are ignored whenever WAITM<3:0> = 0000.
DS39951C-page 194
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 18-3:
PMADDR: PARALLEL PORT ADDRESS REGISTER
U-0
R/W-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
—
CS1
—
—
—
ADDR10(1)
ADDR9(1)
ADDR8(1)
bit 15
bit 8
R/W-0
ADDR7
(1)
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ADDR6(1)
ADDR5(1)
ADDR4(1)
ADDR3(1)
ADDR2(1)
ADDR1(1)
ADDR0(1)
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14
CS1: Chip Select 1 bit
1 = Chip Select 1 is active
0 = Chip Select 1 is inactive
bit 13-11
Unimplemented: Read as ‘0’
bit 10-0
ADDR<10:0>: Parallel Port Destination Address bits(1)
Note 1:
x = Bit is unknown
PMA<10:2> bits are not available on 28-pin devices.
REGISTER 18-4:
U-0
PMAEN: PARALLEL PORT ENABLE REGISTER
R/W-0
—
U-0
PTEN14
—
U-0
—
U-0
R/W-0
R/W-0
R/W-0
—
PTEN10(1)
PTEN9(1)
PTEN8(1)
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PTEN7(1)
PTEN6(1)
PTEN5(1)
PTEN4(1)
PTEN3(1)
PTEN2(1)
PTEN1
PTEN0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
Unimplemented: Read as ‘0’
bit 14
PTEN14: PMCS1 Strobe Enable bit
1 = PMCS1 functions as chip select
0 = PMCS1 pin functions as port I/O
bit 13-11
Unimplemented: Read as ‘0’
bit 10-2
PTEN<10:2>: PMP Address Port Enable bits(1)
1 = PMA<10:2> function as PMP address lines
0 = PMA<10:2> function as port I/O
bit 1-0
PTEN<1:0>: PMALH/PMALL Strobe Enable bits
1 = PMA1 and PMA0 function as either PMA<1:0> or PMALH and PMALL
0 = PMA1 and PMA0 pads function as port I/O
Note 1:
PMA<10:2> bits are not available on 28-pin devices.
 2010 Microchip Technology Inc.
DS39951C-page 195
PIC24FJ64GA104 FAMILY
REGISTER 18-5:
PMSTAT: PARALLEL PORT STATUS REGISTER
R-0
R/W-0, HS
U-0
U-0
R-0
R-0
R-0
R-0
IBF
IBOV
—
—
IB3F
IB2F
IB1F
IB0F
bit 15
bit 8
R-1
R/W-0, HS
U-0
U-0
R-1
R-1
R-1
R-1
OBE
OBUF
—
—
OB3E
OB2E
OB1E
OB0E
bit 7
bit 0
Legend:
HS = Hardware Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
IBF: Input Buffer Full Status bit
1 = All writable input buffer registers are full
0 = Some or all of the writable input buffer registers are empty
bit 14
IBOV: Input Buffer Overflow Status bit
1 = A write attempt to a full input byte register occurred (must be cleared in software)
0 = No overflow occurred
bit 13-12
Unimplemented: Read as ‘0’
bit 11-8
IB3F:IB0F Input Buffer x Status Full bits
1 = Input buffer contains data that has not been read (reading buffer will clear this bit)
0 = Input buffer does not contain any unread data
bit 7
OBE: Output Buffer Empty Status bit
1 = All readable output buffer registers are empty
0 = Some or all of the readable output buffer registers are full
bit 6
OBUF: Output Buffer Underflow Status bits
1 = A read occurred from an empty output byte register (must be cleared in software)
0 = No underflow occurred
bit 5-4
Unimplemented: Read as ‘0’
bit 3-0
OB3E:OB0E Output Buffer x Status Empty bits
1 = Output buffer is empty (writing data to the buffer will clear this bit)
0 = Output buffer contains data that has not been transmitted
DS39951C-page 196
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 18-6:
PADCFG1: PAD CONFIGURATION CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
R/W-0
R/W-0
RTSECSEL1(1) RTSECSEL0(1)
R/W-0
PMPTTL
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-3
Unimplemented: Read as ‘0’
bit 2-1
RTSECSEL<1:0>: RTCC Seconds Clock Output Select bits(1)
11 = Reserved; do not use
10 = RTCC source clock is selected for the RTCC pin (clock can be LPRC or SOSC, depending on the
setting of the Flash Configuration bit, RTCOSC (CW4<5>))
01 = RTCC seconds clock is selected for the RTCC pin
00 = RTCC alarm pulse is selected for the RTCC pin
bit 0
PMPTTL: PMP Module TTL Input Buffer Select bit
1 = PMP module uses TTL input buffers
0 = PMP module uses Schmitt Trigger input buffers
Note 1:
To enable the actual RTCC output, the RTCOE (RCFGCAL<10>) bit needs to be set.
 2010 Microchip Technology Inc.
DS39951C-page 197
PIC24FJ64GA104 FAMILY
FIGURE 18-2:
LEGACY PARALLEL SLAVE PORT EXAMPLE
PIC24F Slave
Master
PMD<7:0>
FIGURE 18-3:
PMD<7:0>
PMCS1
PMCS1
PMRD
PMRD
PMWR
PMWR
Address Bus
Data Bus
Control Lines
ADDRESSABLE PARALLEL SLAVE PORT EXAMPLE
Master
PIC24F Slave
PMA<1:0>
PMA<1:0>
PMD<7:0>
PMD<7:0>
Write
Address
Decode
Read
Address
Decode
PMDOUT1L (0)
PMDIN1L (0)
PMCS1
PMCS1
PMDOUT1H (1)
PMDIN1H (1)
PMRD
PMRD
PMDOUT2L (2)
PMDIN2L (2)
PMWR
PMWR
PMDOUT2H (3)
PMDIN2H (3)
Address Bus
Data Bus
Control Lines
TABLE 18-1:
SLAVE MODE ADDRESS RESOLUTION
PMA<1:0>
Output Register (Buffer)
Input Register (Buffer)
00
PMDOUT1<7:0> (0)
PMDIN1<7:0> (0)
01
PMDOUT1<15:8> (1)
PMDIN1<15:8> (1)
10
PMDOUT2<7:0> (2)
PMDIN2<7:0> (2)
11
PMDOUT2<15:8> (3)
PMDIN2<15:8> (3)
FIGURE 18-4:
MASTER MODE, DEMULTIPLEXED ADDRESSING (SEPARATE READ AND
WRITE STROBES, SINGLE CHIP SELECT)
PIC24F
PMA<10:0>
PMD<7:0>
PMCS1
PMRD
Address Bus
Data Bus
PMWR
DS39951C-page 198
Control Lines
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
FIGURE 18-5:
MASTER MODE, PARTIALLY MULTIPLEXED ADDRESSING (SEPARATE READ
AND WRITE STROBES, SINGLE CHIP SELECT)
PIC24F
PMA<10:8>
PMD<7:0>
PMA<7:0>
PMCS1
Address Bus
PMALL
FIGURE 18-6:
PMRD
Multiplexed
Data and
Address Bus
PMWR
Control Lines
MASTER MODE, FULLY MULTIPLEXED ADDRESSING (SEPARATE READ AND
WRITE STROBES, SINGLE CHIP SELECT)
PMD<7:0>
PMA<7:0>
PMA<15:8>
PIC24F
PMCS1
PMALL
PMALH
FIGURE 18-7:
PMRD
Multiplexed
Data and
Address Bus
PMWR
Control Lines
EXAMPLE OF A MULTIPLEXED ADDRESSING APPLICATION
PIC24F
PMD<7:0>
PMALL
373
A<7:0>
D<7:0>
373
PMALH
A<15:8>
A<15:0>
D<7:0>
CE
OE
WR
PMCS1
FIGURE 18-8:
Address Bus
PMRD
Data Bus
PMWR
Control Lines
EXAMPLE OF A PARTIALLY MULTIPLEXED ADDRESSING APPLICATION
PIC24F
PMD<7:0>
373
PMALL
PMA<10:8>
PMCS1
PMRD
PMWR
 2010 Microchip Technology Inc.
A<7:0>
D<7:0>
A<10:8>
A<10:0>
D<7:0>
CE
OE
WR
Address Bus
Data Bus
Control Lines
DS39951C-page 199
PIC24FJ64GA104 FAMILY
FIGURE 18-9:
EXAMPLE OF AN 8-BIT MULTIPLEXED ADDRESS AND DATA APPLICATION
PIC24F
Parallel Peripheral
PMD<7:0>
PMALL
AD<7:0>
ALE
PMCS1
CS
Address Bus
PMRD
RD
Data Bus
PMWR
WR
Control Lines
FIGURE 18-10:
PARALLEL EEPROM EXAMPLE (UP TO 11-BIT ADDRESS, 8-BIT DATA)
PIC24F
PMA<n:0>
Parallel EEPROM
A<n:0>
PMD<7:0>
D<7:0>
PMCS1
CE
PMRD
OE
PMWR
WR
FIGURE 18-11:
Address Bus
Data Bus
Control Lines
PARALLEL EEPROM EXAMPLE (UP TO 11-BIT ADDRESS, 16-BIT DATA)
Parallel EEPROM
PIC24F
PMA<n:0>
A<n:1>
PMD<7:0>
D<7:0>
PMBE
A0
PMCS1
CE
PMRD
OE
PMWR
WR
FIGURE 18-12:
Address Bus
Data Bus
Control Lines
LCD CONTROL EXAMPLE (BYTE MODE OPERATION)
PIC24F
PMD<7:0>
PMA0
PMRD/PMWR
PMCS1
LCD Controller
D<7:0>
RS
R/W
E
Address Bus
Data Bus
Control Lines
DS39951C-page 200
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
19.0
Note:
REAL-TIME CLOCK AND
CALENDAR (RTCC)
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 29. “Real-Time Clock and
Calendar (RTCC)” (DS39696).
The RTCC provides the user with a Real-Time Clock
and Calendar (RTCC) function that can be calibrated.
• Alarm-configurable for half a second, one second,
10 seconds, one minute, 10 minutes, one hour,
one day, one week, one month or one year
• Alarm repeat with decrementing counter
• Alarm with indefinite repeat chime
• Year 2000 to 2099 leap year correction
• BCD format for smaller software overhead
• Optimized for long-term battery operation
• User calibration of the 32.768 kHz clock
crystal/32K INTRC frequency with periodic
auto-adjust
Key features of the RTCC module are:
19.1
• Operates in Deep Sleep mode
• Selectable clock source
• Provides hours, minutes and seconds using
24-hour format
• Visibility of one half second period
• Provides calendar – weekday, date, month and
year
RTCC Source Clock
The user can select between the SOSC crystal
oscillator or the LPRC Low-Power Internal Oscillator as
the clock reference for the RTCC module. This is configured using the RTCOSC (CW4<5>) Configuration
bit. This gives the user an option to trade off system
cost, accuracy and power consumption, based on the
overall system needs.
The SOSC and RTCC will both remain running while
the device is held in Reset with MCLR and will continue
running after MCLR is released.
FIGURE 19-1:
RTCC BLOCK DIAGRAM
RTCC Clock Domain
Input from
SOSC/LPRC
Oscillator
CPU Clock Domain
RCFGCAL
RTCC Prescalers
ALCFGRPT
RTCVAL
YEAR
MTHDY
WKDYHR
MINSEC
ALRMVAL
ALMTHDY
ALWDHR
ALMINSEC
0.5 Sec
RTCC Timer
Alarm
Event
1 Sec
Comparator
Alarm Registers with Masks
RTSECSEL<1:0>
Repeat Counter
01
RTCC Interrupt Logic
RTCC
Interrupt
Alarm Pulse
00
RTCC
Pin
10
Clock Source
RTCOE
 2010 Microchip Technology Inc.
DS39951C-page 201
PIC24FJ64GA104 FAMILY
19.2
RTCC Module Registers
TABLE 19-2:
The RTCC module registers are organized into three
categories:
• RTCC Control Registers
• RTCC Value Registers
• Alarm Value Registers
19.2.1
To limit the register interface, the RTCC Timer and
Alarm Time registers are accessed through
corresponding register pointers. The RTCC Value
register window (RTCVALH and RTCVALL) uses the
RTCPTR bits (RCFGCAL<9:8>) to select the desired
Timer register pair (see Table 19-1).
By writing to the RTCVALH byte, the RTCC Pointer
value (the RTCPTR<1:0> bits) decrements by one until
they reach ‘00’. Once they reach ‘00’, the MINUTES
and SECONDS value will be accessible through
RTCVALH and RTCVALL until the pointer value is
manually changed.
RTCPTR<1:0>
RTCVAL REGISTER MAPPING
RTCC Value Register Window
RTCVAL<15:8>
RTCVAL<7:0>
00
MINUTES
SECONDS
01
WEEKDAY
HOURS
10
MONTH
DAY
11
—
YEAR
EXAMPLE 19-1:
asm
asm
asm
asm
asm
asm
asm
asm
asm
asm
ALRMSEC
ALRMWD
ALRMHR
10
ALRMMNTH
ALRMDAY
11
—
—
Considering that the 16-bit core does not distinguish
between 8-bit and 16-bit read operations, the user must
be aware that when reading either the ALRMVALH or
ALRMVALL bytes, the ALRMPTR<1:0> value will be
decremented. The same applies to the RTCVALH or
RTCVALL bytes with the RTCPTR<1:0> being
decremented.
Note:
19.2.2
This only applies to read operations and
not write operations.
WRITE LOCK
To perform a write to any of the RTCC Timer registers,
the RTCWREN bit (RCFGCAL<13>) must be set (refer
to Example 19-1).
Note:
19.2.3
To avoid accidental writes to the timer, it is
recommended that the RTCWREN bit
(RCFGCAL<13>) is kept clear at any
other time. For the RTCWREN bit to be
set, there is only one instruction cycle time
window allowed between the 55h/AA
sequence and the setting of RTCWREN;
therefore, it is recommended that code
follow the procedure in Example 19-1.
SELECTING RTCC CLOCK SOURCE
The clock source for the RTCC module can be selected
using the Flash Configuration bit, RTCOSC (CW4<5>).
When the bit is set to ‘1’, the Secondary Oscillator
(SOSC) is used as the reference clock, and when the
bit is ‘0’, LPRC is used as the reference clock.
SETTING THE RTCWREN BIT
volatile(“push w7”);
volatile(“push w8”);
volatile(“disi #5”);
volatile(“mov #0x55, w7”);
volatile(“mov w7, _NVMKEY”);
volatile(“mov #0xAA, w8”);
volatile(“mov w8, _NVMKEY”);
volatile(“bset _RCFGCAL, #13”);
volatile(“pop w8”);
volatile(“pop w7”);
DS39951C-page 202
ALRMVAL<15:8> ALRMVAL<7:0>
01
The Alarm Value register window (ALRMVALH and
ALRMVALL)
uses
the
ALRMPTR
bits
(ALCFGRPT<9:8>) to select the desired Alarm register
pair (see Table 19-2).
By writing to the ALRMVALH byte, the Alarm Pointer
value (ALRMPTR<1:0> bits) decrements by one until
they reach ‘00’. Once they reach ‘00’, the ALRMMIN
and ALRMSEC value will be accessible through
ALRMVALH and ALRMVALL until the pointer value is
manually changed.
Alarm Value Register Window
ALRMMIN
00
REGISTER MAPPING
TABLE 19-1:
ALRMPTR
<1:0>
ALRMVAL REGISTER
MAPPING
//set the RTCWREN bit
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
19.2.4
RTCC CONTROL REGISTERS
REGISTER 19-1: RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER(1)
R/W-0
RTCEN
(2)
U-0
R/W-0
R-0, HSC
R-0, HSC
R/W-0
R/W-0
R/W-0
—
RTCWREN
RTCSYNC
HALFSEC(3)
RTCOE
RTCPTR1
RTCPTR0
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
CAL7
CAL6
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
bit 7
bit 0
Legend:
HSC = Hardware Settable/Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
RTCEN: RTCC Enable bit(2)
1 = RTCC module is enabled
0 = RTCC module is disabled
bit 14
Unimplemented: Read as ‘0’
bit 13
RTCWREN: RTCC Value Registers Write Enable bit
1 = RTCVALH and RTCVALL registers can be written to by the user
0 = RTCVALH and RTCVALL registers are locked out from being written to by the user
bit 12
RTCSYNC: RTCC Value Registers Read Synchronization bit
1 = RTCVALH, RTCVALL and ALCFGRPT registers can change while reading due to a rollover ripple
resulting in an invalid data read. If the register is read twice and results in the same data, the data
can be assumed to be valid.
0 = RTCVALH, RTCVALL or ALCFGRPT registers can be read without concern over a rollover ripple
bit 11
HALFSEC: Half Second Status bit(3)
1 = Second half period of a second
0 = First half period of a second
bit 10
RTCOE: RTCC Output Enable bit
1 = RTCC output is enabled
0 = RTCC output is disabled
bit 9-8
RTCPTR<1:0>: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading the RTCVALH and RTCVALL registers.
The RTCPTR<1:0> value decrements on every read or write of RTCVALH until it reaches ‘00’.
RTCVAL<15:8>:
00 = MINUTES
01 = WEEKDAY
10 = MONTH
11 = Reserved
RTCVAL<7:0>:
00 = SECONDS
01 = HOURS
10 = DAY
11 = YEAR
Note 1:
2:
3:
The RCFGCAL register is only affected by a POR.
A write to the RTCEN bit is only allowed when RTCWREN = 1.
This bit is read-only; it is cleared to ‘0’ on a write to the lower half of the MINSEC register.
 2010 Microchip Technology Inc.
DS39951C-page 203
PIC24FJ64GA104 FAMILY
REGISTER 19-1: RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER(1) (CONTINUED)
bit 7-0
Note 1:
2:
3:
CAL<7:0>: RTC Drift Calibration bits
01111111 = Maximum positive adjustment; adds 508 RTC clock pulses every one minute
.
.
.
01111111 = Minimum positive adjustment; adds 4 RTC clock pulses every one minute
00000000 = No adjustment
11111111 = Minimum negative adjustment; subtracts 4 RTC clock pulses every one minute
.
.
.
10000000 = Maximum negative adjustment; subtracts 512 RTC clock pulses every one minute
The RCFGCAL register is only affected by a POR.
A write to the RTCEN bit is only allowed when RTCWREN = 1.
This bit is read-only; it is cleared to ‘0’ on a write to the lower half of the MINSEC register.
REGISTER 19-2:
PADCFG1: PAD CONFIGURATION CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
R/W-0
R/W-0
RTSECSEL1(1) RTSECSEL0(1)
R/W-0
PMPTTL
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-3
Unimplemented: Read as ‘0’
bit 2-1
RTSECSEL<1:0>: RTCC Seconds Clock Output Select bits(1)
11 = Reserved; do not use
10 = RTCC source clock is selected for the RTCC pin (clock can be LPRC or SOSC, depending on the
setting of the RTCOSC bit (CW4<5>))
01 = RTCC seconds clock is selected for the RTCC pin
00 = RTCC alarm pulse is selected for the RTCC pin
bit 0
PMPTTL: PMP Module TTL Input Buffer Select bit
1 = PMP module uses TTL input buffers
0 = PMP module uses Schmitt Trigger input buffers
Note 1:
To enable the actual RTCC output, the RTCOE (RCFGCAL<10>) bit needs to be set.
DS39951C-page 204
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 19-3:
ALCFGRPT: ALARM CONFIGURATION REGISTER
R/W-0
ALRMEN
bit 15
R/W-0
CHIME
R/W-0
AMASK3
R/W-0
AMASK2
R/W-0
AMASK1
R/W-0
AMASK0
R/W-0
ALRMPTR1
R/W-0
ARPT7
bit 7
R/W-0
ARPT6
R/W-0
ARPT5
R/W-0
ARPT4
R/W-0
ARPT3
R/W-0
ARPT2
R/W-0
ARPT1
Legend:
R = Readable bit
-n = Value at POR
bit 15
bit 14
bit 13-10
bit 9-8
bit 7-0
W = Writable bit
‘1’ = Bit is set
R/W-0
ALRMPTR0
bit 8
R/W-0
ARPT0
bit 0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
ALRMEN: Alarm Enable bit
1 = Alarm is enabled (cleared automatically after an alarm event whenever ARPT<7:0> = 00h and
CHIME = 0)
0 = Alarm is disabled
CHIME: Chime Enable bit
1 = Chime is enabled; ARPT<7:0> bits are allowed to roll over from 00h to FFh
0 = Chime is disabled; ARPT<7:0> bits stop once they reach 00h
AMASK<3:0>: Alarm Mask Configuration bits
0000 = Every half second
0001 = Every second
0010 = Every 10 seconds
0011 = Every minute
0100 = Every 10 minutes
0101 = Every hour
0110 = Once a day
0111 = Once a week
1000 = Once a month
1001 = Once a year (except when configured for February 29th, once every 4 years)
101x = Reserved; do not use
11xx = Reserved; do not use
ALRMPTR<1:0>: Alarm Value Register Window Pointer bits
Points to the corresponding Alarm Value registers when reading the ALRMVALH and ALRMVALL registers.
The ALRMPTR<1:0> value decrements on every read or write of ALRMVALH until it reaches ‘00’.
ALRMVAL<15:8>:
00 = ALRMMIN
01 = ALRMWD
10 = ALRMMNTH
11 = Unimplemented
ALRMVAL<7:0>:
00 = ALRMSEC
01 = ALRMHR
10 = ALRMDAY
11 = Unimplemented
ARPT<7:0>: Alarm Repeat Counter Value bits
11111111 = Alarm will repeat 255 more times
.
.
.
00000000 = Alarm will not repeat
The counter decrements on any alarm event; it is prevented from rolling over from 00h to FFh unless
CHIME = 1.
 2010 Microchip Technology Inc.
DS39951C-page 205
PIC24FJ64GA104 FAMILY
19.2.5
RTCVAL REGISTER MAPPINGS
REGISTER 19-4:
YEAR: YEAR VALUE REGISTER(1)
U-0, HSC
U-0, HSC
U-0, HSC
U-0, HSC
U-0, HSC
U-0, HSC
U-0, HSC
U-0, HSC
—
—
—
—
—
—
—
—
bit 15
bit 8
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
YRTEN3
YRTEN2
YRTEN1
YRTEN0
YRONE3
YRONE2
YRONE1
YRONE0
bit 7
bit 0
Legend:
HSC = Hardware Settable/Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-8
Unimplemented: Read as ‘0’
bit 7-4
YRTEN<3:0>: Binary Coded Decimal Value of Year’s Tens Digit bits
Contains a value from 0 to 9.
bit 3-0
YRONE<3:0>: Binary Coded Decimal Value of Year’s Ones Digit bits
Contains a value from 0 to 9.
Note 1:
x = Bit is unknown
A write to the YEAR register is only allowed when RTCWREN = 1.
REGISTER 19-5:
MTHDY: MONTH AND DAY VALUE REGISTER(1)
U-0, HSC
U-0, HSC
U-0, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
—
—
—
MTHTEN0
MTHONE3
MTHONE2
MTHONE1
MTHONE0
bit 15
bit 8
U-0, HSC
U-0, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
—
—
DAYTEN1
DAYTEN0
DAYONE3
DAYONE2
DAYONE1
DAYONE0
bit 7
bit 0
Legend:
HSC = Hardware Settable/Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12
MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of 0 or 1.
bit 11-8
MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.
bit 3-0
DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
Note 1:
A write to this register is only allowed when RTCWREN = 1.
DS39951C-page 206
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 19-6:
WKDYHR: WEEKDAY AND HOURS VALUE REGISTER(1)
U-0, HSC
U-0, HSC
U-0, HSC
U-0, HSC
U-0, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
—
—
—
—
—
WDAY2
WDAY1
WDAY0
bit 15
bit 8
U-0, HSC
U-0, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
—
—
HRTEN1
HRTEN0
HRONE3
HRONE2
HRONE1
HRONE0
bit 7
bit 0
Legend:
HSC = Hardware Settable/Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-11
Unimplemented: Read as ‘0’
bit 10-8
WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
bit 3-0
HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
Note 1:
x = Bit is unknown
A write to this register is only allowed when RTCWREN = 1.
REGISTER 19-7:
MINSEC: MINUTES AND SECONDS VALUE REGISTER
U-0, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
—
MINTEN2
MINTEN1
MINTEN0
MINONE3
MINONE2
MINONE1
MINONE0
bit 15
bit 8
U-0, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
R/W-x, HSC
—
SECTEN2
SECTEN1
SECTEN0
SECONE3
SECONE2
SECONE1
SECONE0
bit 7
bit 0
Legend:
HSC = Hardware Settable/Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 11-8
MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
bit 7
Unimplemented: Read as ‘0’
bit 6-4
SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0
SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 207
PIC24FJ64GA104 FAMILY
19.2.6
ALRMVAL REGISTER MAPPINGS
REGISTER 19-8:
ALMTHDY: ALARM MONTH AND DAY VALUE REGISTER(1)
U-0
—
bit 15
U-0
—
U-0
—
R/W-x
MTHTEN0
R/W-x
MTHONE3
R/W-x
MTHONE2
R/W-x
MTHONE1
R/W-x
MTHONE0
bit 8
U-0
—
U-0
—
R/W-x
DAYTEN1
R/W-x
DAYTEN0
R/W-x
DAYONE3
R/W-x
DAYONE2
R/W-x
DAYONE1
R/W-x
DAYONE0
bit 0
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-13
bit 12
bit 11-8
bit 7-6
bit 5-4
bit 3-0
Note 1:
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Unimplemented: Read as ‘0’
MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of 0 or 1.
MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
Unimplemented: Read as ‘0’
DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.
DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
A write to this register is only allowed when RTCWREN = 1.
REGISTER 19-9:
ALWDHR: ALARM WEEKDAY AND HOURS VALUE REGISTER(1)
U-0
—
bit 15
U-0
—
U-0
—
U-0
—
U-0
—
R/W-x
WDAY2
R/W-x
WDAY1
R/W-x
WDAY0
bit 8
U-0
—
U-0
—
R/W-x
HRTEN1
R/W-x
HRTEN0
R/W-x
HRONE3
R/W-x
HRONE2
R/W-x
HRONE1
R/W-x
HRONE0
bit 0
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-11
bit 10-8
bit 7-6
bit 5-4
bit 3-0
Note 1:
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Unimplemented: Read as ‘0’
WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
Unimplemented: Read as ‘0’
HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
A write to this register is only allowed when RTCWREN = 1.
DS39951C-page 208
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 19-10: ALMINSEC: ALARM MINUTES AND SECONDS VALUE REGISTER
U-0
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
—
MINTEN2
MINTEN1
MINTEN0
MINONE3
MINONE2
MINONE1
MINONE0
bit 15
bit 8
U-0
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
—
SECTEN2
SECTEN1
SECTEN0
SECONE3
SECONE2
SECONE1
SECONE0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
Unimplemented: Read as ‘0’
bit 14-12
MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 11-8
MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
bit 7
Unimplemented: Read as ‘0’
bit 6-4
SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0
SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 209
PIC24FJ64GA104 FAMILY
19.3
Calibration
The real-time crystal input can be calibrated using the
periodic auto-adjust feature. When properly calibrated,
the RTCC can provide an error of less than 3 seconds
per month. This is accomplished by finding the number
of error clock pulses and storing the value into the
lower half of the RCFGCAL register. The 8-bit signed
value loaded into the lower half of RCFGCAL is
multiplied by four and will either be added or subtracted
from the RTCC timer, once every minute. Refer to the
steps below for RTCC calibration:
1.
2.
3.
Using another timer resource on the device; the
user must find the error of the 32.768 kHz crystal.
Once the error is known, it must be converted to
the number of error clock pulses per minute.
a) If the oscillator is faster than ideal (negative
result from step 2), the RCFGCAL register value
must be negative. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
b) If the oscillator is slower than ideal (positive
result from step 2), the RCFGCAL register value
must be positive. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
Divide the number of error clocks per minute by 4 to get
the correct calibration value and load the RCFGCAL
register with the correct value. (Each 1-bit increment in
the calibration adds or subtracts 4 pulses.)
EQUATION 19-1:
(Ideal Frequency† – Measured Frequency) * 60 =
Clocks per Minute
† Ideal Frequency = 32,768 Hz
Writes to the lower half of the RCFGCAL register
should only occur when the timer is turned off or
immediately after the rising edge of the seconds pulse.
Note:
19.4
It is up to the user to include, in the error
value, the initial error of the crystal drift
due to temperature and drift due to crystal
aging.
Alarm
19.4.1
CONFIGURING THE ALARM
The alarm feature is enabled using the ALRMEN bit.
This bit is cleared when an alarm is issued. Writes to
ALRMVAL should only take place when ALRMEN = 0.
As displayed in Figure 19-2, the interval selection of the
alarm is configured through the AMASK bits
(ALCFGRPT<13:10>). These bits determine which and
how many digits of the alarm must match the clock
value for the alarm to occur.
The alarm can also be configured to repeat based on a
preconfigured interval. The amount of times this
occurs, once the alarm is enabled, is stored in the
ARPT<7:0> bits (ALCFGRPT<7:0>). When the value
of the ARPT bits equals 00h and the CHIME bit
(ALCFGRPT<14>) is cleared, the repeat function is
disabled and only a single alarm will occur. The alarm
can be repeated up to 255 times by loading
ARPT<7:0> with FFh.
After each alarm is issued, the value of the ARPT bits
is decremented by one. Once the value has reached
00h, the alarm will be issued one last time, after which,
the ALRMEN bit will be cleared automatically and the
alarm will turn off.
Indefinite repetition of the alarm can occur if the
CHIME bit = 1. Instead of the alarm being disabled
when the value of the ARPT bits reaches 00h, it rolls
over to FFh and continues counting indefinitely while
CHIME is set.
19.4.2
ALARM INTERRUPT
At every alarm event, an interrupt is generated. In
addition, an alarm pulse output is provided that
operates at half the frequency of the alarm. This output
is completely synchronous to the RTCC clock and can
be used as a trigger clock to other peripherals.
Note:
Changing any of the registers, other than
the RCFGCAL and ALCFGRPT registers,
and the CHIME bit while the alarm is
enabled (ALRMEN = 1), can result in a
false alarm event leading to a false alarm
interrupt. To avoid a false alarm event, the
timer and alarm values should only be
changed while the alarm is disabled
(ALRMEN = 0). It is recommended that the
ALCFGRPT register and CHIME bit be
changed when RTCSYNC = 0.
• Configurable from half second to one year
• Enabled using the ALRMEN bit (ALCFGRPT<15>)
• One-time alarm and repeat alarm options are
available
DS39951C-page 210
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
FIGURE 19-2:
ALARM MASK SETTINGS
Alarm Mask Setting
(AMASK<3:0>)
Day of
the
Week
Month
Day
Hours
Minutes
Seconds
0000 - Every half second
0001 - Every second
0010 - Every 10 seconds
s
0011 - Every minute
s
s
m
s
s
m
m
s
s
0100 - Every 10 minutes
0101 - Every hour
0110 - Every day
0111 - Every week
d
1000 - Every month
1001 - Every year(1)
Note 1:
m
m
h
h
m
m
s
s
h
h
m
m
s
s
d
d
h
h
m
m
s
s
d
d
h
h
m
m
s
s
Annually, except when configured for February 29.
 2010 Microchip Technology Inc.
DS39951C-page 211
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 212
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
20.0
Note:
32-BIT PROGRAMMABLE
CYCLIC REDUNDANCY CHECK
(CRC) GENERATOR
The programmable CRC generator provides a
hardware-implemented method of quickly generating
checksums for various networking and security
applications. It offers the following features:
• User-programmable CRC polynomial equation,
up to 32 bits
• Programmable shift direction (little or big-endian)
• Independent data and polynomial lengths
• Configurable interrupt output
• Data FIFO
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 41. “32-Bit Programmable
Cyclic Redundancy Check (CRC)”
(DS39729).
FIGURE 20-1:
A simplified block diagram of the CRC generator is
shown in Figure 20-1. A simple version of the CRC shift
engine is shown in Figure 20-2.
CRC BLOCK DIAGRAM
CRCDATH
CRCDATL
Variable FIFO
(4x32, 8x16 or 16x8)
FIFO Empty Event
CRCISEL
2 * FCY Shift Clock
1
Shift Buffer
Set CRCIF
0
0
1
LENDIAN
CRC Shift Engine
CRCWDATH
FIGURE 20-2:
Shift Complete Event
CRCWDATL
CRC SHIFT ENGINE DETAIL
CRCWDATH
CRCWDATL
Read/Write Bus
X(1)(1)
Shift Buffer
Data
Note 1:
2:
Bit 0
X(2)(1)
Bit 1
X(n)(1)
Bit 2
Bit n(2)
Each XOR stage of the shift engine is programmable. See text for details.
Polynomial length n is determined by ([PLEN<3:0>] + 1)
 2010 Microchip Technology Inc.
DS39951C-page 213
PIC24FJ64GA104 FAMILY
20.1
User Interface
20.1.1
POLYNOMIAL INTERFACE
The CRC module can be programmed for CRC
polynomials of up to the 32nd order, using up to 32 bits.
Polynomial length, which reflects the highest exponent
in the equation, is selected by the PLEN<4:0> bits
(CRCCON2<4:0>).
The CRCXORL and CRCXORH registers control which
exponent terms are included in the equation. Setting a
particular bit includes that exponent term in the
equation; functionally, this includes an XOR operation
on the corresponding bit in the CRC engine. Clearing
the bit disables the XOR.
For example, consider two CRC polynomials, one a
16-bit equation and the other, a 32-bit equation:
x16 + x12 + x5 + 1
and
x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7
+ x5 + x4 + x2 + x + 1
To program these polynomials into the CRC generator,
set the register bits as shown in Table 20-1.
Note that the appropriate positions are set to ‘1’ to indicate that they are used in the equation (for example, X26
and X23). The 0 bit required by the equation is always
XORed; thus, X0 is a don’t care. For a polynomial of
length N, it is assumed that the Nth bit will always be
used, regardless of the bit setting. Therefore, for a polynomial length of 32, there is no 32nd bit in the CRCxOR
register.
20.1.2
DATA INTERFACE
The data for which the CRC is to be calculated must
first be written into the FIFO. Even if the data width is
less than 8, the smallest data element that can be written into the FIFO is one byte. For example, if the
DWIDTH value is five, then the size of the data is
DWIDTH + 1, or six. The data is written as a whole byte;
the two unused upper bits are ignored by the module.
Once data is written into the MSb of the CRCDAT registers (that is, MSb as defined by the data width), the
value of the VWORD<4:0> bits (CRCCON1<12:8>)
increments by one. For example, if the DWIDTH value
is 24, the VWORD bits will increment when bit 7 of
CRCDATH is written. Therefore, CRCDATL must
always be written before CRCDATH.
The CRC engine starts shifting data when the CRCGO
bit is set and the value of VWORD is greater than zero.
Each word is copied out of the FIFO into a buffer
register, which decrements VWORD. The data is then
shifted out of the buffer. The CRC engine continues
shifting at a rate of two bits per instruction cycle, until
the VWORD value reaches zero. This means that for a
given data width, it takes half that number of instructions for each word to complete the calculation. For
example, it takes 16 cycles to calculate the CRC for a
single word of 32-bit data.
When the VWORD value reaches the maximum value
for the configured value of DWIDTH (4, 8 or 16), the
CRCFUL bit becomes set. When the VWORD value
reaches zero, the CRCMPT bit becomes set. The FIFO
is emptied and the VWORD<4:0> bits are set to
‘00000’ whenever CRCEN is ‘0’.
At least one instruction cycle must pass, after a write to
CRCDAT, before a read of the VWORD bits is done.
The module incorporates a FIFO that works with a variable data width. Input data width can be configured to
any value between one and 32 bits using the
DWIDTH<4:0> bits (CRCCON2<12:8>). When the
data width is greater than 15, the FIFO is four words
deep. When the DWIDTH value is between 15 and 8,
the FIFO is 8 words deep. When the DWIDTH value is
less than 8, the FIFO is 16 words deep.
TABLE 20-1:
CRC SETUP EXAMPLES FOR 16 AND 32-BIT POLYNOMIAL
CRC Control
Bits
PLEN<4:0>
Bit Values
16-Bit Polynomial
32-Bit Polynomial
01111
11111
X<31:16>
0000 0000 0000 000x
0000 0100 1100 0001
X<15:0>
0001 0000 0010 000x
0001 1101 1011 011x
DS39951C-page 214
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
20.1.3
DATA SHIFT DIRECTION
The LENDIAN bit (CRCCON1<3>) is used to control
the shift direction. By default, the CRC will shift data
through the engine, MSb first. Setting LENDIAN (= 1)
causes the CRC to shift data, LSb first. This setting
allows better integration with various communication
schemes and removes the overhead of reversing the
bit order in software. Note that this only changes the
direction of the data that is shifted into the engine. The
result of the CRC calculation will still be a normal CRC
result, not a reverse CRC result.
20.1.4
INTERRUPT OPERATION
The module generates an interrupt that is configurable
by the user for either of two conditions.
If CRCISEL is ‘0’, an interrupt is generated when the
VWORD<4:0> bits make a transition from a value of ‘1’
to ‘0’. If CRCISEL is ‘1’, an interrupt will be generated
after the CRC operation finishes and the module sets
the CRCGO bit to ‘0’. Manually setting CRCGO to ‘0’
will not generate an interrupt.
20.1.5
20.2
Registers
There are eight registers associated with the module:
•
•
•
•
•
•
•
•
CRCCON1
CRCCON2
CRCXORL
CRCXORH
CRCDATL
CRCDATH
CRCWDATL
CRCWDATH
The
CRCCON1
and
CRCCON2
registers
(Register 20-1 and Register 20-2) control the operation
of the module, and configure the various settings. The
CRCXOR registers (Register 20-3 and Register 20-4)
select the polynomial terms to be used in the CRC
equation. The CRCDAT and CRCWDAT registers are
each register pairs that serve as buffers for the
double-word, input data and CRC processed output,
respectively.
TYPICAL OPERATION
To use the module for a typical CRC calculation:
1.
2.
3.
4.
5.
6.
7.
8.
Set the CRCEN bit to enable the module.
Configure the module for the desired operation:
d) Program the desired polynomial using the
CRCXORL and CRCXORH registers, and
the PLEN<4:0> bits
e) Configure the data width and shift direction
using the DWIDTH and LENDIAN bits
f) Select the desired interrupt mode using the
CRCISEL bit
Preload the FIFO by writing to the CRCDATL
and CRCDATH registers until the CRCFUL bit is
set or no data is left
Clear old results by writing 00h to CRCWDATL
and CRCWDATH. CRCWDAT can also be left
unchanged to resume a previously halted
calculation.
Set the CRCGO bit to start calculation.
Write remaining data into the FIFO as space
becomes available.
When the calculation completes, CRCGO is
automatically cleared. An interrupt will be
generated if CRCISEL = 1.
Read CRCWDATL and CRCWDATH for the
result of the calculation.
 2010 Microchip Technology Inc.
DS39951C-page 215
PIC24FJ64GA104 FAMILY
REGISTER 20-1:
CRCCON1: CRC CONTROL REGISTER 1
R/W-0
U-0
R/W-0
R-0
R-0
R-0
R-0
R-0
CRCEN
—
CSIDL
VWORD4
VWORD3
VWORD2
VWORD1
VWORD0
bit 15
bit 8
R-0, HCS
R-1, HCS
R/W-0
R/W-0, HC
R/W-0
U-0
U-0
U-0
CRCFUL
CRCMPT
CRCISEL
CRCGO
LENDIAN
—
—
—
bit 7
bit 0
Legend:
HC = Hardware Clearable bit
HCS = Hardware Clearable/Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
CRCEN: CRC Enable bit
1 = Module is enabled
0 = Module is enabled. All state machines, pointers and CRCWDAT/CRCDAT are reset; other SFRs are
NOT reset.
bit 14
Unimplemented: Read as ‘0’
bit 13
CSIDL: CRC Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-8
VWORD<4:0>: Pointer Value bits
Indicates the number of valid words in the FIFO. Has a maximum value of 8 when PLEN<3:0> > 7, or
16 when PLEN<3:0> 7.
bit 7
CRCFUL: FIFO Full bit
1 = FIFO is full
0 = FIFO is not full
bit 6
CRCMPT: FIFO Empty Bit
1 = FIFO is empty
0 = FIFO is not empty
bit 5
CRCISEL: CRC interrupt Selection bit
1 = Interrupt on FIFO is empty; CRC calculation is not complete
0 = Interrupt on shift is complete and CRCWDAT result is ready
bit 4
CRCGO: Start CRC bit
1 = Start CRC serial shifter
0 = CRC serial shifter is turned off
bit 3
LENDIAN: Data Shift Direction Select bit
1 = Data word is shifted into the CRC starting with the LSb (little endian)
0 = Data word is shifted into the CRC starting with the MSb (big endian)
bit 2-0
Unimplemented: Read as ‘0’
DS39951C-page 216
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 20-2:
CRCCON2: CRC CONTROL REGISTER 2
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
DWIDTH4
DWIDTH3
DWIDTH2
DWIDTH1
DWIDTH0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
PLEN4
PLEN3
PLEN2
PLEN1
PLEN0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
DWIDTH<4:0>: Data Width Select bits
Defines the width of the data word (Data Word Width = (DWIDTH<4:0>) + 1).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
PLEN<4:0>: Polynomial Length Select bits
Defines the length of the CRC polynomial (Polynomial Length = (PLEN<4:0>) + 1).
REGISTER 20-3:
CRCXORL: CRC XOR POLYNOMIAL REGISTER, LOW BYTE
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
X15
X14
X13
X12
X11
X10
X9
X8
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
X7
X6
X5
X4
X3
X2
X1
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-1
X<15:1>: XOR of Polynomial Term Xn Enable bits
bit 0
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 217
PIC24FJ64GA104 FAMILY
REGISTER 20-4:
CRCXORH: CRC XOR POLYNOMIAL REGISTER, HIGH BYTE
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
X31
X30
X29
X28
X27
X26
X25
X24
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
X23
X22
X21
X20
X19
X18
X17
X16
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-0
x = Bit is unknown
X<31:16>: XOR of Polynomial Term Xn Enable bits
DS39951C-page 218
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
21.0
Note:
10-BIT HIGH-SPEED A/D
CONVERTER
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 17. “10-Bit A/D Converter”
(DS39705).
A block diagram of the A/D Converter is shown in
Figure 21-1.
To perform an A/D conversion:
1.
The 10-bit A/D Converter has the following key
features:
•
•
•
•
•
•
•
•
•
•
•
Successive Approximation (SAR) conversion
Conversion speeds of up to 500 ksps
13 analog input pins
External voltage reference input pins
Internal band gap reference inputs
Automatic Channel Scan mode
Selectable conversion trigger source
16-word conversion result buffer
Selectable Buffer Fill modes
Four result alignment options
Operation during CPU Sleep and Idle modes
2.
Configure the A/D module:
a) Configure port pins as analog inputs and/or
select band gap reference inputs
(AD1PCFGL<15:0> and AD1PCFGH<1:0>).
b) Select voltage reference source to match
expected range on analog inputs
(AD1CON2<15:13>).
c) Select the analog conversion clock to match
the desired data rate with the processor
clock (AD1CON3<7:0>).
d) Select the appropriate sample/conversion
sequence
(AD1CON1<7:5>
and
AD1CON3<12:8>).
e) Select how conversion results are
presented in the buffer (AD1CON1<9:8>).
f) Select interrupt rate (AD1CON2<5:2>).
g) Turn on A/D module (AD1CON1<15>).
Configure the A/D interrupt (if required):
a) Clear the AD1IF bit.
b) Select A/D interrupt priority.
On all PIC24FJ64GA104 family devices, the 10-bit A/D
Converter has 13 analog input pins, designated AN0
through AN12. In addition, there are two analog input
pins for external voltage reference connections (VREF+
and VREF-). These voltage reference inputs may be
shared with other analog input pins.
 2010 Microchip Technology Inc.
DS39951C-page 219
PIC24FJ64GA104 FAMILY
FIGURE 21-1:
10-BIT HIGH-SPEED A/D CONVERTER BLOCK DIAGRAM
Internal Data Bus
AVSS
VREF+
VR Select
AVDD
VR+
16
VR-
VREF-
Comparator
VINH
AN0
VINL
VRS/H
VR+
DAC
AN1
AN2
AN5
MUX A
AN4
10-Bit SAR
VINH
AN3
Conversion Logic
Data Formatting
AN6
ADC1BUF0:
ADC1BUFF
VINL
AN7
AN8
AD1CON1
AN9
AD1CON2
AD1CON3
AD1CHS0
AN10
AN12
VDDCORE
VBG/2
MUX B
AN11
VINH
AD1PCFGL
AD1PCFGH
AD1CSSL
AD1CSSH
VINL
VBG
Sample Control
Control Logic
Conversion Control
Input MUX Control
Pin Config Control
DS39951C-page 220
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 21-1:
AD1CON1: A/D CONTROL REGISTER 1
R/W-0
U-0
R/W-0
U-0
U-0
U-0
R/W-0
R/W-0
ADON(1)
—
ADSIDL
—
—
—
FORM1
FORM0
bit 15
bit 8
R/W-0
R/W-0
R/W-0
U-0
U-0
R/W-0
R/W-0, HCS
R/C-0, HCS
SSRC2
SSRC1
SSRC0
—
—
ASAM
SAMP
DONE
bit 7
bit 0
Legend:
C = Clearable bit
HCS = Hardware Clearable/Settable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
ADON: A/D Operating Mode bit(1)
1 = A/D Converter module is operating
0 = A/D Converter is off
bit 14
Unimplemented: Read as ‘0’
bit 13
ADSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-10
Unimplemented: Read as ‘0’
bit 9-8
FORM<1:0>: Data Output Format bits
11 = Signed fractional (sddd dddd dd00 0000)
10 = Fractional (dddd dddd dd00 0000)
01 = Signed integer (ssss sssd dddd dddd)
00 = Integer (0000 00dd dddd dddd)
bit 7-5
SSRC<2:0>: Conversion Trigger Source Select bits
111 = Internal counter ends sampling and starts conversion (auto-convert)
110 = CTMU event ends sampling and starts conversion
101 = Reserved
100 = Timer5 compare ends sampling and starts conversion
011 = Reserved
010 = Timer3 compare ends sampling and starts conversion
001 = Active transition on INT0 pin ends sampling and starts conversion
000 = Clearing the SAMP bit ends sampling and starts conversion
bit 4-3
Unimplemented: Read as ‘0’
bit 2
ASAM: A/D Sample Auto-Start bit
1 = Sampling begins immediately after the last conversion completes; SAMP bit is auto-set
0 = Sampling begins when the SAMP bit is set
bit 1
SAMP: A/D Sample Enable bit
1 = A/D sample/hold amplifier is sampling input
0 = A/D sample/hold amplifier is holding
bit 0
DONE: A/D Conversion Status bit
1 = A/D conversion is done
0 = A/D conversion is NOT done
Note 1:
Values of ADC1BUFx registers will not retain their values once the ADON bit is cleared. Read out the
conversion values from the buffer before disabling the module.
 2010 Microchip Technology Inc.
DS39951C-page 221
PIC24FJ64GA104 FAMILY
REGISTER 21-2:
AD1CON2: A/D CONTROL REGISTER 2
R/W-0
R/W-0
R/W-0
r-0
U-0
R/W-0
U-0
U-0
VCFG2
VCFG1
VCFG0
r
—
CSCNA
—
—
bit 15
bit 8
R-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
BUFS
—
SMPI3
SMPI2
SMPI1
SMPI0
BUFM
ALTS
bit 7
bit 0
Legend:
r = Reserved bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-13
x = Bit is unknown
VCFG<2:0>: Voltage Reference Configuration bits
VCFG<2:0>
VR+
VR-
000
AVDD
AVSS
001
External VREF+ pin
AVSS
010
AVDD
External VREF- pin
011
External VREF+ pin
External VREF- pin
1xx
AVDD
AVSS
bit 12
Reserved: Maintain as ‘0’
bit 11
Unimplemented: Read as ‘0’
bit 10
CSCNA: Scan Input Selections for CH0+ S/H Input for MUX A Input Multiplexer Setting bit
1 = Scan inputs
0 = Do not scan inputs
bit 9-8
Unimplemented: Read as ‘0’
bit 7
BUFS: Buffer Fill Status bit (valid only when BUFM = 1)
1 = A/D is currently filling buffer 08-0F; user should access data in 00-07
0 = A/D is currently filling buffer 00-07; user should access data in 08-0F
bit 6
Unimplemented: Read as ‘0’
bit 5-2
SMPI<3:0>: Sample/Convert Sequences Per Interrupt Selection bits
1111 = Interrupts at the completion of conversion for each 16th sample/convert sequence
1110 = Interrupts at the completion of conversion for each 15th sample/convert sequence
.....
0001 = Interrupts at the completion of conversion for each 2nd sample/convert sequence
0000 = Interrupts at the completion of conversion for each sample/convert sequence
bit 1
BUFM: Buffer Mode Select bit
1 = Buffer is configured as two 8-word buffers (ADC1BUFn<15:8> and ADC1BUFn<7:0>)
0 = Buffer is configured as one 16-word buffer (ADC1BUFn<15:0>)
bit 0
ALTS: Alternate Input Sample Mode Select bit
1 = Uses MUX A input multiplexer settings for first sample, then alternates between MUX B and
MUX A input multiplexer settings for all subsequent samples
0 = Always uses MUX A input multiplexer settings
DS39951C-page 222
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 21-3:
AD1CON3: A/D CONTROL REGISTER 3
R/W-0
r-0
r-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ADRC
r
r
SAMC4
SAMC3
SAMC2
SAMC1
SAMC0
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ADCS7
ADCS6
ADCS5
ADCS4
ADCS3
ADCS2
ADCS1
ADCS0
bit 7
bit 0
Legend:
r = Reserved bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
ADRC: A/D Conversion Clock Source bit
1 = A/D internal RC clock
0 = Clock derived from system clock
bit 14-13
Reserved: Maintain as ‘0’
bit 12-8
SAMC<4:0>: Auto-Sample Time bits
11111 = 31 TAD
·····
00001 = 1 TAD
00000 = 0 TAD (not recommended)
bit 7-0
ADCS<7:0>: A/D Conversion Clock Select bits
11111111 to 01000000 = Reserved
······
00111111 = 64 • TCY
······
00000001 = 2 • TCY
00000000 = TCY
 2010 Microchip Technology Inc.
x = Bit is unknown
DS39951C-page 223
PIC24FJ64GA104 FAMILY
REGISTER 21-4:
AD1CHS: A/D INPUT SELECT REGISTER
R/W-0
U-0
U-0
CH0NB
—
—
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
CH0SB4(1,2) CH0SB3(1,2) CH0SB2(1,2) CH0SB1(1,2) CH0SB0(1,2)
bit 15
bit 8
R/W-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
CH0NA
—
—
CH0SA4
CH0SA3
CH0SA2
CH0SA1
CH0SA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
CH0NB: Channel 0 Negative Input Select for MUX B Multiplexer Setting bit
1 = Channel 0 negative input is AN1
0 = Channel 0 negative input is VR-
bit 14-13
Unimplemented: Read as ‘0’
bit 12-8
CH0SB<4:0>: Channel 0 Positive Input Select for MUX B Multiplexer Setting bits(1,2)
11111 = Channel 0 positive input is reserved for CTMU use only(3)
1xxxx = Unimplemented; do not use.
01111 = Channel 0 positive input is internal band gap reference (VBG)
01110 = Channel 0 positive input is VBG/2
01101 = Channel 0 positive input is voltage regulator output (VDDCORE)
01100 = Channel 0 positive input is AN12
01011 = Channel 0 positive input is AN11
01010 = Channel 0 positive input is AN10
01001 = Channel 0 positive input is AN9
01000 = Channel 0 positive input is AN8
00111 = Channel 0 positive input is AN7
00110 = Channel 0 positive input is AN6
00101 = Channel 0 positive input is AN5
00100 = Channel 0 positive input is AN4
00011 = Channel 0 positive input is AN3
00010 = Channel 0 positive input is AN2
00001 = Channel 0 positive input is AN1
00000 = Channel 0 positive input is AN0
bit 7
CH0NA: Channel 0 Negative Input Select for MUX A Multiplexer Setting bit
1 = Channel 0 negative input is AN1
0 = Channel 0 negative input is VR-
bit 6-5
Unimplemented: Read as ‘0’
bit 4-0
CH0SA<4:0>: Channel 0 Positive Input Select for MUX A Multiplexer Setting bits
Implemented combinations are identical to those for CH0SB<4:0> (above).
Note 1:
2:
3:
Combinations not shown here are unimplemented; do not use.
Analog channels, AN6, AN7, AN8 and AN12, are unavailable on 28-pin devices; do not use.
Selecting this internal channel allows the CTMU module to utilize the A/D Converter sample and hold
capacitor (CAD) for the smallest time measurements.
DS39951C-page 224
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 21-5:
AD1PCFG: A/D PORT CONFIGURATION REGISTER
R/W-0
R/W-0
R/W-0
R/W-0(1)
R/W-0
R/W-0
R/W-0
R/W-0(1)
PCFG15
PCFG14
PCFG13
PCFG12
PCFG11
PCFG10
PCFG9
PCFG8
bit 15
bit 8
R/W-0(1)
R/W-0(1)
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PCFG7
PCFG6
PCFG5
PCFG4
PCFG3
PCFG2
PCFG1
PCFG0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
PCFG15: A/D Input Band Gap Reference Enable bit
1 = Internal band gap (VBG) reference channel is disabled
0 = Internal band gap reference channel is enabled
bit 14
PCFG14: A/D Input Half Band Gap Reference Enable bit
1 = Internal half band gap (VBG/2) reference channel is disabled
0 = Internal half band gap reference channel is enabled
bit 13
PCFG13: A/D Input Voltage Regulator Output Reference Enable bit
1 = Internal voltage regulator output (VDDCORE) reference channel is disabled
0 = Internal voltage regulator output reference channel is enabled
bit 12-0
PCFG<12:0>: Analog Input Pin Configuration Control bits(1)
1 = Pin for corresponding analog channel is configured in Digital mode; I/O port read is enabled
0 = Pin is configured in Analog mode; I/O port read is disabled, A/D samples pin voltage
Note 1:
Analog channels, AN6, AN7, AN8 and AN12, are unavailable on 28-pin devices; leave these corresponding
bits set.
 2010 Microchip Technology Inc.
DS39951C-page 225
PIC24FJ64GA104 FAMILY
REGISTER 21-6:
AD1CSSL: A/D INPUT SCAN SELECT REGISTER
R/W-0
R/W-0
R/W-0
R/W-0(1)
R/W-0
R/W-0
R/W-0
R/W-0
CSSL15
CSSL14
CSSL13
CSSL12
CSSL11
CSSL10
CSSL9
CSSL8(1)
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
CSSL7
CSSL6
CSSL5
CSSL4
CSSL3
CSSL2
CSSL1
CSSL0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
CSSL15: A/D Input Band Gap Scan Enable bit
1 = Internal band gap (VBG) channel is enabled for input scan
0 = Analog channel is disabled from input scan
bit 14
CSSL14: A/D Input Half Band Gap Scan Enable bit
1 = Internal half band gap (VBG/2) channel is enabled for input scan
0 = Analog channel is disabled from input scan
bit 13
CSSL13: A/D Input Voltage Regulator Output Scan Enable bit
1 = Internal voltage regulator output (VDDCORE) is enabled for input scan
0 = Analog channel is disabled from input scan
bit 12-0
CSSL<12:0>: A/D Input Pin Scan Selection bits(1)
1 = Corresponding analog channel is selected for input scan
0 = Analog channel is omitted from input scan
Note 1:
Analog channels, AN6, AN7, AN8 and AN12, are unavailable on 28-pin devices; leave these corresponding
bits cleared.
DS39951C-page 226
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
A/D CONVERSION CLOCK PERIOD(1)
EQUATION 21-1:
ADCS =
TAD
–1
TCY
TAD = TCY • (ADCS + 1)
Note 1:
FIGURE 21-2:
Based on TCY = 2 * TOSC, Doze mode and PLL are disabled.
10-BIT A/D CONVERTER ANALOG INPUT MODEL
VDD
Rs
VA
RIC  250
VT = 0.6V
ANx
CPIN
6-11 pF
(Typical)
VT = 0.6V
Sampling
Switch
RSS  5 k(Typical)
RSS
ILEAKAGE
500 nA
CHOLD
= ADC capacitance
= 4.4 pF (Typical)
VSS
Legend: CPIN
= Input Capacitance
= Threshold Voltage
VT
ILEAKAGE = Leakage Current at the pin due to
various junctions
= Interconnect Resistance
RIC
= Sampling Switch Resistance
RSS
= Sample/Hold Capacitance (from DAC)
CHOLD
Note: CPIN value depends on the device package and is not tested. The effect of CPIN is negligible if Rs  5 k.
 2010 Microchip Technology Inc.
DS39951C-page 227
PIC24FJ64GA104 FAMILY
FIGURE 21-3:
A/D TRANSFER FUNCTION
Output Code
(Binary (Decimal))
11 1111 1111 (1023)
11 1111 1110 (1022)
10 0000 0011 (515)
10 0000 0010 (514)
10 0000 0001 (513)
10 0000 0000 (512)
01 1111 1111 (511)
01 1111 1110 (510)
01 1111 1101 (509)
00 0000 0001 (1)
DS39951C-page 228
(VINH – VINL)
VR+
1024
1023*(VR+ – VR-)
VR- +
1024
VR- +
512*(VR+ – VR-)
1024
VR- +
Voltage Level
VR+ – VR-
0
VR-
00 0000 0000 (0)
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
22.0
TRIPLE COMPARATOR
MODULE
Note:
The comparator outputs may be directly connected to
the CxOUT pins. When the respective COE equals ‘1’,
the I/O pad logic makes the unsynchronized output of
the comparator available on the pin.
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
associated “PIC24F Family Reference
Manual”,
Section
46.
“Scalable
Comparator Module” (DS39734)
A simplified block diagram of the module in shown in
Figure 22-1. Diagrams of the possible individual
comparator configurations are shown in Figure 22-2.
Each comparator has its own control register,
CMxCON (Register 22-1), for enabling and configuring
its operation. The output and event status of all three
comparators are provided in the CMSTAT register
(Register 22-2).
The triple comparator module provides three dual input
comparators. The inputs to the comparator can be configured to use any one of four external analog inputs, as
well as voltage reference inputs from the voltage
reference generator and band gap reference.
FIGURE 22-1:
TRIPLE COMPARATOR MODULE BLOCK DIAGRAM
EVPOL<1:0>
CCH<1:0>
CREF
CPOL
Trigger/Interrupt
Logic
CEVT
COE
VINCXINB
CXINC
CXIND
VIN+
C1
Input
Select
Logic
COUT
C1OUT
Pin
EVPOL<1:0>
CVREF-
CPOL
Trigger/Interrupt
Logic
CEVT
COE
VINVIN+
C2
COUT
EVPOL<1:0>
CXINA
CVREF+
CPOL
VINVIN+
Trigger/Interrupt
Logic
CEVT
COE
C3
COUT
 2010 Microchip Technology Inc.
C2OUT
Pin
C3OUT
Pin
DS39951C-page 229
PIC24FJ64GA104 FAMILY
FIGURE 22-2:
INDIVIDUAL COMPARATOR CONFIGURATIONS
Comparator Off
CEN = 0, CREF = x, CCH<1:0> = xx
COE
VINVIN+
Cx
Off (Read as ‘0’)
Comparator CxINB > CxINA Compare
CEN = 1, CREF = 0, CCH<1:0> = 00
CXINB
CXINA
VIN+
Comparator CxINC > CxINA Compare
CEN = 1, CREF = 0, CCH<1:0> = 01
COE
VIN-
CXINC
Cx
CxOUT
Pin
CXINA
COE
VINVIN+
CVREF-
Cx
CxOUT
Pin
Comparator CxINB > CVREF+ Compare
CEN = 1, CREF = 1, CCH<1:0> = 00
CXINB
CVREF+
CXINC
Cx
CxOUT
Pin
CVREF+
DS39951C-page 230
VIN+
CVREF+
Cx
CxOUT
Pin
COE
VINVIN+
Cx
CxOUT
Pin
COE
VINVIN+
Cx
CxOUT
Pin
Comparator CVREF- > CVREF+ Compare
CEN = 1, CREF = 1, CCH<1:0> = 11
COE
VIN-
VIN+
Comparator CxINC > CVREF+ Compare
CEN = 1, CREF = 1, CCH<1:0> = 01
Comparator CxIND > CVREF+ Compare
CEN = 1, CREF = 1, CCH<1:0> = 10
CXIND
CXINA
COE
VINVIN+
CXINA
COE
VIN-
Comparator CVREF- > CxINA Compare
CEN = 1, CREF = 0, CCH<1:0> = 11
Comparator CxIND > CxINA Compare
CEN = 1, CREF = 0, CCH<1:0> = 10
CXIND
CxOUT
Pin
CVREF-
Cx
CxOUT
Pin
CVREF+
COE
VINVIN+
Cx
CxOUT
Pin
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 22-1:
CMxCON: COMPARATOR x CONTROL REGISTERS
(COMPARATORS 1 THROUGH 3)
R/W-0
R/W-0
R/W-0
U-0
U-0
U-0
R/W-0
R-0
CEN
COE
CPOL
—
—
—
CEVT
COUT
bit 15
bit 8
R/W-0
R/W-0
U-0
R/W-0
U-0
U-0
R/W-0
R/W-0
EVPOL1
EVPOL0
—
CREF
—
—
CCH1
CCH0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
CEN: Comparator Enable bit
1 = Comparator is enabled
0 = Comparator is disabled
bit 14
COE: Comparator Output Enable bit
1 = Comparator output is present on the CxOUT pin.
0 = Comparator output is internal only
bit 13
CPOL: Comparator Output Polarity Select bit
1 = Comparator output is inverted
0 = Comparator output is not inverted
bit 12-10
Unimplemented: Read as ‘0’
bit 9
CEVT: Comparator Event bit
1 = Comparator event defined by EVPOL<1:0> has occurred; subsequent triggers and interrupts are
disabled until the bit is cleared
0 = Comparator event has not occurred
bit 8
COUT: Comparator Output bit
When CPOL = 0:
1 = VIN+ > VIN0 = VIN+ < VINWhen CPOL = 1:
1 = VIN+ < VIN0 = VIN+ > VIN-
bit 7-6
EVPOL<1:0>: Trigger/Event/Interrupt Polarity Select bits
11 = Trigger/event/interrupt generated on any change of the comparator output (while CEVT = 0)
10 = Trigger/event/interrupt generated on transition of the comparator output:
If CPOL = 0 (non-inverted polarity):
High-to-low transition only.
If CPOL = 1 (inverted polarity):
Low-to-high transition only.
01 = Trigger/event/interrupt generated on transition of comparator output:
If CPOL = 0 (non-inverted polarity):
Low-to-high transition only.
If CPOL = 1 (inverted polarity):
High-to-low transition only.
00 = Trigger/event/interrupt generation is disabled
bit 5
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
DS39951C-page 231
PIC24FJ64GA104 FAMILY
REGISTER 22-1:
CMxCON: COMPARATOR x CONTROL REGISTERS
(COMPARATORS 1 THROUGH 3) (CONTINUED)
bit 4
CREF: Comparator Reference Select bits (non-inverting input)
1 = Non-inverting input connects to internal CVREF+ input reference voltage
0 = Non-inverting input connects to CxINA pin
bit 3-2
Unimplemented: Read as ‘0’
bit 1-0
CCH<1:0>: Comparator Channel Select bits
11 = Inverting input of comparator connects to CVREF- input reference voltage
10 = Inverting input of comparator connects to CxIND pin
01 = Inverting input of comparator connects to CxINC pin
00 = Inverting input of comparator connects to CxINB pin
REGISTER 22-2:
CMSTAT: COMPARATOR MODULE STATUS REGISTER
R/W-0
U-0
U-0
U-0
U-0
R-0
R-0
R-0
CMIDL
—
—
—
—
C3EVT
C2EVT
C1EVT
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
R-0
R-0
R-0
—
—
—
—
—
C3OUT
C2OUT
C1OUT
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
CMIDL: Comparator Stop in Idle Mode bit
1 = Discontinue operation of all comparators when device enters Idle mode
0 = Continue operation of all enabled comparators in Idle mode
bit 14-11
Unimplemented: Read as ‘0’
bit 10
C3EVT: Comparator 3 Event Status bit (read-only)
Shows the current event status of Comparator 3 (CM3CON<9>).
bit 9
C2EVT: Comparator 2 Event Status bit (read-only)
Shows the current event status of Comparator 2 (CM2CON<9>).
bit 8
C1EVT: Comparator 1 Event Status bit (read-only)
Shows the current event status of Comparator 1 (CM1CON<9>).
bit 7-3
Unimplemented: Read as ‘0’
bit 2
C3OUT: Comparator 3 Output Status bit (read-only)
Shows the current output of Comparator 3 (CM3CON<8>).
bit 1
C2OUT: Comparator 2 Output Status bit (read-only)
Shows the current output of Comparator 2 (CM2CON<8>).
bit 0
C1OUT: Comparator 1 Output Status bit (read-only)
Shows the current output of Comparator 1 (CM1CON<8>).
DS39951C-page 232
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
23.0
COMPARATOR VOLTAGE
REFERENCE
Note:
23.1
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 20. “Comparator Voltage
Reference Module” (DS39709).
Configuring the Comparator
Voltage Reference
voltage, each with 16 distinct levels. The range to be
used is selected by the CVRR bit (CVRCON<5>). The
primary difference between the ranges is the size of the
steps selected by the CVREF Selection bits
(CVR<3:0>), with one range offering finer resolution.
The comparator reference supply voltage can come
from either VDD and VSS, or the external VREF+ and
VREF-. The voltage source is selected by the CVRSS
bit (CVRCON<4>).
The settling time of the comparator voltage reference
must be considered when changing the CVREF
output.
The voltage reference module is controlled through the
CVRCON register (Register 23-1). The comparator
voltage reference provides two ranges of output
FIGURE 23-1:
VREF+
AVDD
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
CVRSS = 1
8R
CVRSS = 0
CVR<3:0>
CVREFP
R
CVREN
R
VREF+
1
CVREF+
R
16-to-1 MUX
R
0
16 Steps
R
CVREF
R
CVROE
R
CVRR
VREF-
CVREFM<1:0>
8R
CVRSS = 1
CVRSS = 0
AVSS
 2010 Microchip Technology Inc.
VREF+
11
VBG/6
10
VBG
01
VBG/2
00
CVREF-
DS39951C-page 233
PIC24FJ64GA104 FAMILY
REGISTER 23-1:
CVRCON: COMPARATOR VOLTAGE REFERENCE CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
—
—
—
—
—
CVREFP
CVREFM1
CVREFM0
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
CVREN
CVROE
CVRR
CVRSS
CVR3
CVR2
CVR1
CVR0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-11
Unimplemented: Read as ‘0’
bit 10
CVREFP: CVREF+ Reference Output Select bit
1 = Use VREF+ input pin as CVREF+ reference output to comparators
0 = Use comparator voltage reference module’s generated output as CVREF+ reference output to
comparators
bit 9-8
CVREFM<1:0>: CVREF- Reference Output Select bits
11 = Use VREF+ input pin as CVREF- reference output to comparators
10 = Use VBG/6 as CVREF- reference output to comparators
01 = Use VBG as CVREF- reference output to comparators
00 = Use VBG/2 as CVREF- reference output to comparators
bit 7
CVREN: Comparator Voltage Reference Enable bit
1 = CVREF circuit is powered on
0 = CVREF circuit is powered down
bit 6
CVROE: Comparator VREF Output Enable bit
1 = CVREF voltage level is output on CVREF pin
0 = CVREF voltage level is disconnected from CVREF pin
bit 5
CVRR: Comparator VREF Range Selection bit
1 = CVRSRC range should be 0 to 0.625 CVRSRC with CVRSRC/24 step size
0 = CVRSRC range should be 0.25 to 0.719 CVRSRC with CVRSRC/32 step size
bit 4
CVRSS: Comparator VREF Source Selection bit
1 = Comparator reference source, CVRSRC = VREF+ – VREF0 = Comparator reference source, CVRSRC = AVDD – AVSS
bit 3-0
CVR<3:0>: Comparator VREF Value Selection (0  CVR<3:0>  15) bits
When CVRR = 1:
CVREF = (CVR<3:0>/24)  (CVRSRC)
When CVRR = 0:
CVREF = 1/4  (CVRSRC) + (CVR<3:0>/32)  (CVRSRC)
DS39951C-page 234
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
24.0
Note:
CHARGE TIME
MEASUREMENT UNIT (CTMU)
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
associated “PIC24F Family Reference
Manual”, Section 11. “Charge Time
Measurement Unit (CTMU)” (DS39724).
The Charge Time Measurement Unit is a flexible
analog module that provides accurate differential time
measurement between pulse sources, as well as
asynchronous pulse generation. Its key features
include:
•
•
•
•
•
•
Four edge input trigger sources
Polarity control for each edge source
Control of edge sequence
Control of response to edges
Time measurement resolution of 1 nanosecond
Accurate current source suitable for capacitive
measurement
Together with other on-chip analog modules, the CTMU
can be used to precisely measure time, measure
capacitance, measure relative changes in capacitance
or generate output pulses that are independent of the
system clock. The CTMU module is ideal for interfacing
with capacitive-based sensors.
The CTMU is controlled through two registers:
CTMUCON and CTMUICON. CTMUCON enables the
module and controls edge source selection, edge
source polarity selection and edge sequencing. The
CTMUICON register controls the selection and trim of
the current source.
FIGURE 24-1:
24.1
Measuring Capacitance
The CTMU module measures capacitance by generating an output pulse, with a width equal to the time
between edge events, on two separate input channels.
The pulse edge events to both input channels can be
selected from four sources: two internal peripheral
modules (OC1 and Timer1) and two external pins
(CTEDG1 and CTEDG2). This pulse is used with the
module’s precision current source to calculate
capacitance according to the relationship:
i=C•
dV
dT
For capacitance measurements, the A/D Converter
samples an external capacitor (CAPP) on one of its
input channels after the CTMU output’s pulse. A Precision Resistor (RPR) provides current source calibration
on a second A/D channel. After the pulse ends, the
converter determines the voltage on the capacitor. The
actual calculation of capacitance is performed in
software by the application.
Figure 24-1 shows the external connections used for
capacitance measurements, and how the CTMU and
A/D modules are related in this application. This
example also shows the edge events coming from
Timer1, but other configurations using external edge
sources are possible. A detailed discussion on
measuring capacitance and time with the CTMU
module is provided in the “PIC24F Family Reference
Manual”.
TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR
CAPACITANCE MEASUREMENT
PIC24F Device
Timer1
CTMU
EDG1
Current Source
EDG2
Output Pulse
ANx
A/D Converter
ANY
CAPP
 2010 Microchip Technology Inc.
RPR
DS39951C-page 235
PIC24FJ64GA104 FAMILY
24.2
Measuring Time
When the module is configured for pulse generation
delay by setting the TGEN bit (CTMUCON<12>), the
internal current source is connected to the B input of
Comparator 2. A capacitor (CDELAY) is connected to
the Comparator 2 pin, C2INB, and the comparator voltage reference, CVREF, is connected to C2INA. CVREF
is then configured for a specific trip point. The module
begins to charge CDELAY when an edge event is
detected. When CDELAY charges above the CVREF trip
point, a pulse is output on CTPLS. The length of the
pulse delay is determined by the value of CDELAY and
the CVREF trip point.
Time measurements on the pulse width can be similarly
performed using the A/D module’s internal capacitor
(CAD) and a precision resistor for current calibration.
Figure 24-2 shows the external connections used for
time measurements, and how the CTMU and A/D
modules are related in this application. This example
also shows both edge events coming from the external
CTEDG pins, but other configurations using internal
edge sources are possible. For the smallest time
measurements, select the internal A/D Channel 31,
CH0Sx <4:0>= 11111. This minimizes any stray capacitance that may otherwise be associated with using an
input pin, thus keeping the total capacitance to that of the
A/D Converter itself (4-5 pF). A detailed discussion on
measuring capacitance and time with the CTMU module
is provided in the “PIC24F Family Reference Manual”.
24.3
Figure 24-3 shows the external connections for pulse
generation, as well as the relationship of the different
analog modules required. While CTEDG1 is shown as
the input pulse source, other options are available. A
detailed discussion on pulse generation with the CTMU
module is provided in the “PIC24F Family Reference
Manual”.
Pulse Generation and Delay
The CTMU module can also generate an output pulse
with edges that are not synchronous with the device’s system clock. More specifically, it can generate a pulse with
a programmable delay from an edge event input to the
module.
FIGURE 24-2:
TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR TIME
MEASUREMENT
PIC24F Device
CTMU
CTEDG1
EDG1
CTEDG2
EDG2
Current Source
Output Pulse
A/D Converter
ANx
CAD
RPR
FIGURE 24-3:
TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR PULSE
DELAY GENERATION
PIC24F Device
CTEDG1
EDG1
CTMU
CTPLS
Current Source
Comparator
C2INB
C2
CDELAY
CVREF
DS39951C-page 236
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 24-1:
R/W-0
CTMUCON: CTMU CONTROL REGISTER
U-0
CTMUEN
R/W-0
—
CTMUSIDL
R/W-0
(1)
TGEN
R/W-0
R/W-0
R/W-0
R/W-0
EDGEN
EDGSEQEN
IDISSEN
CTTRIG
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
EDG2POL
EDG2SEL1
EDG2SEL0
EDG1POL
EDG1SEL1
EDG1SEL0
EDG2STAT
EDG1STAT
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15
CTMUEN: CTMU Enable bit
1 = Module is enabled
0 = Module is disabled
bit 14
Unimplemented: Read as ‘0’
bit 13
CTMUSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12
TGEN: Time Generation Enable bit(1)
1 = Enables edge delay generation
0 = Disables edge delay generation
bit 11
EDGEN: Edge Enable bit
1 = Edges are not blocked
0 = Edges are blocked
bit 10
EDGSEQEN: Edge Sequence Enable bit
1 = Edge 1 event must occur before Edge 2 event can occur
0 = No edge sequence is needed
bit 9
IDISSEN: Analog Current Source Control bit
1 = Analog current source output is grounded
0 = Analog current source output is not grounded
bit 8
CTTRIG: Trigger Control bit
1 = Trigger output is enabled
0 = Trigger output is disabled
bit 7
EDG2POL: Edge 2 Polarity Select bit
1 = Edge 2 is programmed for a positive edge response
0 = Edge 2 is programmed for a negative edge response
bit 6-5
EDG2SEL<1:0>: Edge 2 Source Select bits
11 = CTED1 pin
10 = CTED2 pin
01 = OC1 module
00 = Timer1 module
bit 4
EDG1POL: Edge 1 Polarity Select bit
1 = Edge 1 is programmed for a positive edge response
0 = Edge 1 is programmed for a negative edge response
Note 1:
x = Bit is unknown
If TGEN = 1, the peripheral inputs and outputs must be configured to an available RPn pin. For more
information, see Section 10.4 “Peripheral Pin Select (PPS)”.
 2010 Microchip Technology Inc.
DS39951C-page 237
PIC24FJ64GA104 FAMILY
REGISTER 24-1:
CTMUCON: CTMU CONTROL REGISTER (CONTINUED)
bit 3-2
EDG1SEL<1:0>: Edge 1 Source Select bits
11 = CTED1 pin
10 = CTED2 pin
01 = OC1 module
00 = Timer1 module
bit 1
EDG2STAT: Edge 2 Status bit
1 = Edge 2 event has occurred
0 = Edge 2 event has not occurred
bit 0
EDG1STAT: Edge 1 Status bit
1 = Edge 1 event has occurred
0 = Edge 1 event has not occurred
Note 1:
If TGEN = 1, the peripheral inputs and outputs must be configured to an available RPn pin. For more
information, see Section 10.4 “Peripheral Pin Select (PPS)”.
REGISTER 24-2:
CTMUICON: CTMU CURRENT CONTROL REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ITRIM5
ITRIM4
ITRIM3
ITRIM2
ITRIM1
ITRIM0
IRNG1
IRNG0
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 15-10
ITRIM<5:0>: Current Source Trim bits
011111 = Maximum positive change from nominal current
011110
.....
000001 = Minimum positive change from nominal current
000000 = Nominal current output specified by IRNG<1:0>
111111 = Minimum negative change from nominal current
.....
100010
100001 = Maximum negative change from nominal current
bit 9-8
IRNG<1:0>: Current Source Range Select bits
11 = 100  Base Current
10 = 10  Base Current
01 = Base current level (0.55 A nominal)
00 = Current source is disabled
bit 7-0
Unimplemented: Read as ‘0’
DS39951C-page 238
x = Bit is unknown
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
25.0
Note:
SPECIAL FEATURES
25.1.1
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
following sections of the “PIC24F Family
Reference Manual”:
In PIC24FJ64GA104 family devices, the configuration
bytes are implemented as volatile memory. This means
that configuration data must be programmed each time
the device is powered up. Configuration data is stored in
the three words at the top of the on-chip program memory space, known as the Flash Configuration Words.
Their specific locations are shown in Table 25-1. These
are packed representations of the actual device Configuration bits, whose actual locations are distributed
among several locations in configuration space. The
configuration data is automatically loaded from the Flash
Configuration Words to the proper Configuration
registers during device Resets.
• Section 9. “Watchdog Timer (WDT)”
(DS39697)
• Section 32. “High-Level Device
Integration” (DS39719)
• Section 33. “Programming and
Diagnostics” (DS39716)
PIC24FJ64GA104 family devices include several
features intended to maximize application flexibility and
reliability, and minimize cost through elimination of
external components. These are:
•
•
•
•
•
•
Note:
Flexible Configuration
Watchdog Timer (WDT)
Code Protection
JTAG Boundary Scan Interface
In-Circuit Serial Programming
In-Circuit Emulation
25.1
Configuration data is reloaded on all types
of device Resets.
When creating applications for these devices, users
should always specifically allocate the location of the
Flash Configuration Word for configuration data. This is
to make certain that program code is not stored in this
address when the code is compiled.
The upper byte of all Flash Configuration Words in program memory should always be ‘1111 1111’. This
makes them appear to be NOP instructions in the
remote event that their locations are ever executed by
accident. Since Configuration bits are not implemented
in the corresponding locations, writing ‘1’s to these
locations has no effect on device operation.
Configuration Bits
The Configuration bits can be programmed (read as ‘0’),
or left unprogrammed (read as ‘1’), to select various
device configurations. These bits are mapped starting at
program memory location F80000h. A detailed explanation of the various bit functions is provided in
Register 25-1 through Register 25-6.
Note:
Note that address F80000h is beyond the user program
memory space. In fact, it belongs to the configuration
memory space (800000h-FFFFFFh) which can only be
accessed using table reads and table writes.
TABLE 25-1:
CONSIDERATIONS FOR
CONFIGURING PIC24FJ64GA104
FAMILY DEVICES
Performing a page erase operation on the
last page of program memory clears the
Flash Configuration Words, enabling code
protection as a result. Therefore, users
should avoid performing page erase
operations on the last page of program
memory.
FLASH CONFIGURATION WORD LOCATIONS FOR PIC24FJ64GA104 FAMILY
DEVICES
Device
Configuration Word Addresses
1
2
3
4
PIC24FJ32GA10x
57FEh
57FCh
57FAh
57F8h
PIC24FJ64GA10x
ABFEh
ABFCh
ABFAh
ABF8h
 2010 Microchip Technology Inc.
DS39951C-page 239
PIC24FJ64GA104 FAMILY
REGISTER 25-1:
CW1: FLASH CONFIGURATION WORD 1
U-1
U-1
U-1
U-1
U-1
U-1
U-1
U-1
—
—
—
—
—
—
—
—
bit 23
bit 16
r-x
R/PO-1
R/PO-1
R/PO-1
R/PO-1
U-1
R/PO-1
R/PO-1
r
JTAGEN(1)
GCP
GWRP
DEBUG
—
ICS1
ICS0
bit 15
bit 8
R/PO-1
R/PO-1
U-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
FWDTEN
WINDIS
—
FWPSA
WDTPS3
WDTPS2
WDTPS1
WDTPS0
bit 7
bit 0
Legend:
r = Reserved bit
R = Readable bit
PO = Program Once bit
-n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
bit 23-16
Unimplemented: Read as ‘1’
bit 15
Reserved: The value is unknown; program as ‘0’
bit 14
JTAGEN: JTAG Port Enable bit(1)
1 = JTAG port is enabled
0 = JTAG port is disabled
bit 13
GCP: General Segment Program Memory Code Protection bit
1 = Code protection is disabled
0 = Code protection is enabled for the entire program memory space
bit 12
GWRP: General Segment Code Flash Write Protection bit
1 = Writes to program memory are allowed
0 = Writes to program memory are disabled
bit 11
DEBUG: Background Debugger Enable bit
1 = Device resets into Operational mode
0 = Device resets into Debug mode
bit 10
Unimplemented: Read as ‘1’
bit 9-8
ICS<1:0>: Emulator Pin Placement Select bits
11 = Emulator functions are shared with PGEC1/PGED1
10 = Emulator functions are shared with PGEC2/PGED2
01 = Emulator functions are shared with PGEC3/PGED3
00 = Reserved; do not use
bit 7
FWDTEN: Watchdog Timer Enable bit
1 = Watchdog Timer is enabled
0 = Watchdog Timer is disabled
bit 6
WINDIS: Windowed Watchdog Timer Disable bit
1 = Standard Watchdog Timer is enabled
0 = Windowed Watchdog Timer is enabled; FWDTEN must be ‘1’
bit 5
Unimplemented: Read as ‘1’
bit 4
FWPSA: WDT Prescaler Ratio Select bit
1 = Prescaler ratio of 1:128
0 = Prescaler ratio of 1:32
Note 1:
‘0’ = Bit is cleared
The JTAGEN bit can only be modified using In-Circuit Serial Programming™ (ICSP™). It cannot be
modified while connected through the JTAG interface.
DS39951C-page 240
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 25-1:
bit 3-0
Note 1:
CW1: FLASH CONFIGURATION WORD 1 (CONTINUED)
WDTPS<3:0>: Watchdog Timer Postscaler Select bits
1111 = 1:32,768
1110 = 1:16,384
1101 = 1:8,192
1100 = 1:4,096
1011 = 1:2,048
1010 = 1:1,024
1001 = 1:512
1000 = 1:256
0111 = 1:128
0110 = 1:64
0101 = 1:32
0100 = 1:16
0011 = 1:8
0010 = 1:4
0001 = 1:2
0000 = 1:1
The JTAGEN bit can only be modified using In-Circuit Serial Programming™ (ICSP™). It cannot be
modified while connected through the JTAG interface.
 2010 Microchip Technology Inc.
DS39951C-page 241
PIC24FJ64GA104 FAMILY
REGISTER 25-2:
CW2: FLASH CONFIGURATION WORD 2
U-1
—
bit 23
U-1
—
U-1
—
U-1
—
U-1
—
U-1
—
U-1
—
R/PO-1
IESO
bit 15
U-1
—
U-1
—
U-1
—
U-1
—
R/PO-1
FNOSC2
R/PO-1
FNOSC1
R/PO-1
FNOSC0
bit 8
R/PO-1
FCKSM1
bit 7
R/PO-1
FCKSM0
R/PO-1
OSCIOFCN
R/PO-1
IOL1WAY
U-1
—
R/PO-1
I2C1SEL
R/PO-1
POSCMD1
R/PO-1
POSCMD0
bit 0
Legend:
R = Readable bit
PO = Program Once bit
-n = Value when device is unprogrammed
bit 23-16
bit 15
bit 14-11
bit 10-8
bit 7-6
bit 5
bit 4
bit 3
bit 2
bit 1-0
U-1
—
bit 16
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
Unimplemented: Read as ‘1’
IESO: Internal External Switchover bit
1 = IESO mode (Two-Speed Start-up) is enabled
0 = IESO mode (Two-Speed Start-up) is disabled
Unimplemented: Read as ‘1’
FNOSC<2:0>: Initial Oscillator Select bits
111 = Fast RC Oscillator with Postscaler (FRCDIV)
110 = Reserved
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with Postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
FCKSM<1:0>: Clock Switching and Fail-Safe Clock Monitor Configuration bits
1x = Clock switching and Fail-Safe Clock Monitor are disabled
01 = Clock switching is enabled, Fail-Safe Clock Monitor is disabled
00 = Clock switching is enabled, Fail-Safe Clock Monitor is enabled
OSCIOFCN: OSCO Pin Configuration bit
If POSCMD<1:0> = 11 or 00:
1 = OSCO/CLKO/RA3 functions as CLKO (FOSC/2)
0 = OSCO/CLKO/RA3 functions as port I/O (RC15)
If POSCMD<1:0> = 10 or 01:
OSCIOFCN has no effect on OSCO/CLKO/RA3.
IOL1WAY: IOLOCK One-Way Set Enable bit
1 = The IOLOCK bit (OSCCON<6>) can be set once, provided the unlock sequence has been
completed. Once set, the Peripheral Pin Select registers cannot be written to a second time.
0 = The IOLOCK bit can be set and cleared as needed, provided the unlock sequence has been
completed
Unimplemented: Read as ‘1’
I2C1SEL: I2C1 Pin Select bit
1 = Use default SCL1/SDA1 pins
0 = Use alternate SCL1/SDA1 pins
POSCMD<1:0>: Primary Oscillator Configuration bits
11 = Primary Oscillator is disabled
10 = HS Oscillator mode is selected
01 = XT Oscillator mode is selected
00 = EC Oscillator mode is selected
DS39951C-page 242
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 25-3:
U-1
—
bit 23
R/PO-1
WPEND
bit 15
U-1
—
CW3: FLASH CONFIGURATION WORD 3
U-1
—
U-1
—
U-1
—
U-1
—
U-1
—
U-1
—
U-1
—
bit 16
R/PO-1
WPCFG
R/PO-1
WPDIS
U-1
—
R/PO-1
WUTSEL1
R/PO-1
WUTSEL0
R/PO-1
SOSCSEL1(1)
U-1
—
R/PO-1
WPFP5
R/PO-1
WPFP4
R/PO-1
WPFP3
R/PO-1
WPFP2
R/PO-1
WPFP1
R/PO-1
SOSCSEL0(1)
bit 8
R/PO-1
WPFP0
bit 0
bit 7
Legend:
R = Readable bit
PO = Program Once bit
-n = Value when device is unprogrammed
bit 23-16
bit 15
bit 14
bit 13
bit 12
bit 11-10
bit 9-8
bit 7-6
bit 5-0
Note 1:
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
Unimplemented: Read as ‘1’
WPEND: Segment Write Protection End Page Select bit
1 = Protected code segment lower boundary is at the bottom of program memory (000000h); upper
boundary is the code page specified by WPFP<8:0>
0 = Protected code segment upper boundary is at the last page of program memory; lower boundary
is the code page specified by WPFP<8:0>
WPCFG: Configuration Word Code Page Protection Select bit
1 = Last page (at the top of program memory) and Flash Configuration Words are not protected
0 = Last page and Flash Configuration Words are code-protected
WPDIS: Segment Write Protection Disable bit
1 = Segmented code protection is disabled
0 = Segmented code protection is enabled; protected segment defined by WPEND, WPCFG and
WPFPx Configuration bits
Unimplemented: Read as ‘1’
WUTSEL<1:0>: Voltage Regulator Standby Mode Wake-up Time Select bits
11 = Default regulator start-up time used
01 = Fast regulator start-up time used
x0 = Reserved; do not use
SOSCSEL<1:0>: Secondary Oscillator Power Mode Select bits(1)
11 = SOSC pins are in default (high drive strength) oscillator mode
01 = SOSC pins are in Low-Power (low drive strength) Oscillator mode
00 = SOSC pins have digital I/O functions (RA4, RB4); SCLKI can be used
10 = Reserved
Unimplemented: Read as ‘1’
WPFP5:WPFP0: Protected Code Segment Boundary Page bits
Designates the 512 instruction page that is the boundary of the protected code segment, starting with
Page 9 at the bottom of program memory.
If WPEND = 1:
Last address of designated code page is the upper boundary of the segment.
If WPEND = 0:
First address of designated code page is the lower boundary of the segment.
Digital functions on the SOSCI and SOSCO pins are only available when configured in Digital I/O mode
(‘00’).
 2010 Microchip Technology Inc.
DS39951C-page 243
PIC24FJ64GA104 FAMILY
REGISTER 25-4:
CW4: FLASH CONFIGURATION WORD 4
U-1
U-1
U-1
U-1
U-1
U-1
U-1
U-1
—
—
—
—
—
—
—
—
bit 23
bit 16
U-1
U-1
U-1
U-1
U-1
U-1
U-1
U-1
—
—
—
—
—
—
—
—
bit 15
bit 8
R/PO-1
R/PO-1
R/PO-1
DSWDTEN
DSBOREN
RTCOSC
R/PO-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
DSWDTOSC DSWDTPS3 DSWDTPS2 DSWDTPS1 DSWDTPS0
bit 7
bit 0
Legend:
R = Readable bit
PO = Program Once bit
-n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 23-8
Unimplemented: Read as ‘1’
bit 7
DSWDTEN: Deep Sleep Watchdog Timer Enable bit
1 = DSWDT is enabled
0 = DSWDT is disabled
bit 6
DSBOREN: Deep Sleep BOR Enable bit
1 = BOR is enabled in Deep Sleep
0 = BOR is disabled in Deep Sleep (does not affect Sleep mode)
bit 5
RTCOSC: RTCC Reference Clock Select bit
1 = RTCC uses SOSC as reference clock
0 = RTCC uses LPRC as reference clock
bit 4
DSWDTOSC: DSWDT Reference Clock Select bit
1 = DSWDT uses LPRC as reference clock
0 = DSWDT uses SOSC as reference clock
bit 3-0
DSWDTPS<3:0>: DSWDT Postscale select bits
The DSWDT prescaler is 32; this creates an approximate base time unit of 1 ms.
1111 = 1:2,147,483,648 (25.7 days)
1110 = 1:536,870,912 (6.4 days)
1101 = 1:134,217,728 (38.5 hours)
1100 = 1:33,554,432 (9.6 hours)
1011 = 1:8,388,608 (2.4 hours)
1010 = 1:2,097,152 (36 minutes)
1001 = 1:524,288 (9 minutes)
1000 = 1:131,072 (135 seconds)
0111 = 1:32,768 (34 seconds)
0110 = 1:8,192 (8.5 seconds)
0101 = 1:2,048 (2.1 seconds)
0100 = 1:512 (528 ms)
0011 = 1:128 (132 ms)
0010 = 1:32 (33 ms)
0001 = 1:8 (8.3 ms)
0000 = 1:2 (2.1 ms)
DS39951C-page 244
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
REGISTER 25-5:
U
—
bit 23
DEVID: DEVICE ID REGISTER
U
—
U
—
U
—
U
—
U
—
U
—
R
FAMID7
bit 15
R
FAMID6
R
FAMID5
R
FAMID4
R
FAMID3
R
FAMID2
R
FAMID1
R
FAMID0
bit 8
R
DEV7
bit 7
R
DEV6
R
DEV5
R
DEV4
R
DEV3
R
DEV2
R
DEV1
R
DEV0
bit 0
Legend: R = Read-Only bit
bit 23-16
bit 15-8
bit 7-0
U
—
bit 16
U = Unimplemented bit
Unimplemented: Read as ‘1’
FAMID<7:0>: Device Family Identifier bits
01000010 = PIC24FJ64GA104 family
DEV<7:0>: Individual Device Identifier bits
00000010 = PIC24FJ32GA102
00000110 = PIC24FJ64GA102
00001010 = PIC24FJ32GA104
00001110 = PIC24FJ64GA104
REGISTER 25-6:
DEVREV: DEVICE REVISION REGISTER
U
—
U
—
U
—
U
—
U
—
U
—
U
—
U
—
bit 16
U
—
U
—
U
—
U
—
U
—
U
—
U
—
U
—
bit 23
bit 15
bit 8
U
—
U
—
U
—
U
—
R
REV3
R
REV2
R
REV1
bit 7
Legend: R = Read-only bit
bit 23-4
bit 3-0
R
REV0
bit 0
U = Unimplemented bit
Unimplemented: Read as ‘0’
REV<3:0>: Minor Revision Identifier bits
Encodes revision number of the device (sequential number only; no major/minor fields).
 2010 Microchip Technology Inc.
DS39951C-page 245
PIC24FJ64GA104 FAMILY
25.2
On-Chip Voltage Regulator
All PIC24FJ64GA104 family devices power their core
digital logic at a nominal 2.5V. This may create an issue
for designs that are required to operate at a higher
typical voltage, such as 3.3V. To simplify system
design, all devices in the PIC24FJ64GA104 family
incorporate an on-chip regulator that allows the device
to run its core logic from VDD.
The regulator is controlled by the DISVREG pin. Tying VSS
to the pin enables the regulator, which in turn, provides
power to the core from the other VDD pins. When the regulator is enabled, a low-ESR capacitor (such as ceramic)
must be connected to the VDDCORE/VCAP pin
(Figure 25-1). This helps to maintain the stability of the
regulator. The recommended value for the Filter Capacitor
(CEFC) is provided in Section 28.1 “DC Characteristics”.
FIGURE 25-1:
Regulator Enabled (DISVREG tied to VSS):
3.3V
PIC24FJ64GA104
VDD
DISVREG
VDDCORE/VCAP
CEFC
(10 F typ)
VOLTAGE REGULATOR TRACKING
MODE AND LOW-VOLTAGE
DETECTION
2.5V(1)
When the device enters Tracking mode, it is no longer
possible to operate at full speed. To provide information
about when the device enters Tracking mode, the
on-chip regulator includes a simple, Low-Voltage
Detect circuit. When VDD drops below full-speed operating voltage, the circuit sets the Low-Voltage Detect
Interrupt Flag, LVDIF (IFS4<8>). This can be used to
generate an interrupt and put the application into a
Low-Power Operational mode or trigger an orderly
shutdown.
Low-Voltage Detection is only available when the
regulator is enabled.
3.3V(1)
PIC24FJ64GA104
VDD
DISVREG
VDDCORE/VCAP
VSS
Regulator Disabled (VDD tied to VDDCORE):
2.5V(1)
PIC24FJ64GA104
VDD
When it is enabled, the on-chip regulator provides a
constant voltage of 2.5V nominal to the digital core
logic.
The regulator can provide this level from a VDD of about
2.5V, all the way up to the device’s VDDMAX. It does not
have the capability to boost VDD levels below 2.5V. In
order to prevent “brown-out” conditions when the voltage drops too low for the regulator, the regulator enters
Tracking mode. In Tracking mode, the regulator output
follows VDD with a typical voltage drop of 100 mV.
VSS
Regulator Disabled (DISVREG tied to VDD):
If DISVREG is tied to VDD, the regulator is disabled. In
this case, separate power for the core logic, at a nominal 2.5V, must be supplied to the device on the
VDDCORE/VCAP pin to run the I/O pins at higher voltage
levels, typically 3.3V. Alternatively, the VDDCORE/VCAP
and VDD pins can be tied together to operate at a lower
nominal voltage. Refer to Figure 25-1 for possible
configurations.
25.2.1
CONNECTIONS FOR THE
ON-CHIP REGULATOR
DISVREG
VDDCORE/VCAP
VSS
Note 1:
25.2.2
These are typical operating voltages. Refer
to Section 28.1 “DC Characteristics” for
the full operating ranges of VDD and
VDDCORE.
ON-CHIP REGULATOR AND POR
When the voltage regulator is enabled, it takes approximately 10 s for it to generate output. During this time,
designated as TPM, code execution is disabled. TPM is
applied every time the device resumes operation after
any power-down, including Sleep mode. TPM is
determined by the setting of the PMSLP bit (RCON<8>)
and the WUTSEL Configuration bits (CW3<11:10>).
Note:
For more information on TPM, see
Section 28.0 “Electrical Characteristics”.
If the regulator is disabled, a separate Power-up Timer
(PWRT) is automatically enabled. The PWRT adds a
fixed delay of 64 ms nominal delay at device start-up
(POR or BOR only).
DS39951C-page 246
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
When waking up from Sleep with the regulator
disabled, TPM is used to determine the wake-up time.
To decrease the device wake-up time when operating
with the regulator disabled, the PMSLP bit can be set.
25.3
25.2.3
The nominal WDT clock source from LPRC is 31 kHz.
This feeds a prescaler that can be configured for either
5-bit (divide-by-32) or 7-bit (divide-by-128) operation.
The prescaler is set by the FWPSA Configuration bit.
With a 31 kHz input, the prescaler yields a nominal
WDT time-out period (TWDT) of 1 ms in 5-bit mode, or
4 ms in 7-bit mode.
ON-CHIP REGULATOR AND BOR
When
the
on-chip
regulator
is
enabled,
PIC24FJ64GA104 family devices also have a simple
brown-out capability. If the voltage supplied to the
regulator is inadequate to maintain the tracking level, the
regulator Reset circuitry will generate a Brown-out
Reset. This event is captured by the BOR flag bit
(RCON<1>). The brown-out voltage specifications are
provided in Section 28.0 “Electrical Characteristics”.
25.2.4
POWER-UP REQUIREMENTS
The on-chip regulator is designed to meet the power-up
requirements for the device. If the application does not
use the regulator, then strict power-up conditions must
be adhered to. While powering up, VDDCORE must
never exceed VDD by 0.3 volts.
Note:
25.2.5
For more information, see Section 28.0
“Electrical Characteristics”.
VOLTAGE REGULATOR STANDBY
MODE
When enabled, the on-chip regulator always consumes
a small incremental amount of current over IDD/IPD,
including when the device is in Sleep mode, even
though the core digital logic does not require power. To
provide additional savings in applications where power
resources are critical, the regulator automatically
places itself into Standby mode whenever the device
goes into Sleep mode by removing power from the
Flash program memory. This feature is controlled by
the PMSLP bit (RCON<8>). By default, this bit is
cleared, which enables Standby mode.
For PIC24FJ64GA104 family devices, the time
required for regulator wake-up from Standby mode is
controlled by the WUTSEL<1:0> Configuration bits
(CW3<11:10>). The default wake-up time for all
devices is 190 s, which is a Legacy mode provided to
match older PIC24F device wake-up times.
Implementing the WUTSEL Configuration bits provides
a fast wake-up option. When WUTSEL<1:0> = 01, the
regulator wake-up time is TPM, 10 s.
Watchdog Timer (WDT)
For PIC24FJ64GA104 family devices, the WDT is
driven by the LPRC Oscillator. When the WDT is
enabled, the clock source is also enabled.
A variable postscaler divides down the WDT prescaler
output and allows for a wide range of time-out periods.
The postscaler is controlled by the WDTPS<3:0>
Configuration bits (CW1<3:0>), which allow the selection of a total of 16 settings, from 1:1 to 1:32,768. Using
the prescaler and postscaler time-out periods, ranges
from 1 ms to 131 seconds can be achieved.
The WDT, prescaler and postscaler are reset:
• On any device Reset
• On the completion of a clock switch, whether
invoked by software (i.e., setting the OSWEN bit
after changing the NOSC bits) or by hardware
(i.e., Fail-Safe Clock Monitor)
• When a PWRSAV instruction is executed
(i.e., Sleep or Idle mode is entered)
• When the device exits Sleep or Idle mode to
resume normal operation
• By a CLRWDT instruction during normal execution
If the WDT is enabled, it will continue to run during
Sleep or Idle modes. When the WDT time-out occurs,
the device will wake the device and code execution will
continue from where the PWRSAV instruction was
executed. The corresponding SLEEP or IDLE bits
(RCON<3:2>) will need to be cleared in software after
the device wakes up.
The WDT Flag bit, WDTO (RCON<4>), is not automatically cleared following a WDT time-out. To detect
subsequent WDT events, the flag must be cleared in
software.
Note:
The CLRWDT and PWRSAV instructions
clear the prescaler and postscaler counts
when executed.
When the regulator’s Standby mode is turned off
(PMSLP = 1), Flash program memory stays powered in
Sleep mode. That enables device wake-up without waiting for TPM. With PMSLP set, however, the power
consumption, while in Sleep mode, will be approximately
40 A higher than what it would be if the regulator was
allowed to enter Standby mode.
 2010 Microchip Technology Inc.
DS39951C-page 247
PIC24FJ64GA104 FAMILY
25.3.1
WINDOWED OPERATION
25.3.2
The Watchdog Timer has an optional Fixed Window
mode of operation. In this Windowed mode, CLRWDT
instructions can only reset the WDT during the last 1/4
of the programmed WDT period. A CLRWDT instruction
is executed before that window causes a WDT Reset;
this is similar to a WDT time-out.
Windowed WDT mode is enabled by programming the
WINDIS Configuration bit (CW1<6>) to ‘0’.
FIGURE 25-2:
CONTROL REGISTER
The WDT is enabled or disabled by the FWDTEN
Configuration bit. When the FWDTEN Configuration bit
is set, the WDT is always enabled.
The WDT can be optionally controlled in software when
the FWDTEN Configuration bit has been programmed
to ‘0’. The WDT is enabled in software by setting the
SWDTEN control bit (RCON<5>). The SWDTEN
control bit is cleared on any device Reset. The WDT
software option allows the user to enable the WDT for
critical code segments, and disable the WDT during
non-critical segments, for maximum power savings.
WDT BLOCK DIAGRAM
SWDTEN
FWDTEN
LPRC Control
FWPSA
WDTPS<3:0>
Prescaler
(5-bit/7-bit)
LPRC Input
31 kHz
Wake From Sleep
WDT
Counter
Postscaler
1:1 to 1:32.768
1 ms/4 ms
WDT Overflow
Reset
All Device Resets
Transition to
New Clock Source
Exit Sleep or
Idle Mode
CLRWDT Instr.
PWRSAV Instr.
Sleep or Idle Mode
25.4
Deep Sleep Watchdog Timer
(DSWDT)
PIC24FJ64GA104 family devices have both a WDT
module and a DSWDT module. The latter runs, if
enabled, when a device is in Deep Sleep and is driven
by either the SOSC or LPRC Oscillator. The clock
source is selected by the DSWDTOSC (CW4<4>)
Configuration bit.
The DSWDT can be configured to generate a time-out
at 2.1 ms to 25.7 days by selecting the respective
postscaler.The postscaler can be selected by the
Configuration bits, DSWDTPS<3:0> (CW4<3:0>).
When the DSWDT is enabled, the clock source is also
enabled. DSWDT is one of the sources that can wake
the device from Deep Sleep mode.
25.5
Program Verification and
Code Protection
PIC24FJ64GA104 family devices provide two complimentary methods to protect application code from
overwrites and erasures. These also help to protect the
device from inadvertent configuration changes during
run time.
25.5.1
GENERAL SEGMENT PROTECTION
For all devices in the PIC24FJ64GA104 family, the
on-chip program memory space is treated as a single
block, known as the General Segment (GS). Code protection for this block is controlled by one Configuration
bit, GCP. This bit inhibits external reads and writes to
the program memory space. It has no direct effect in
normal execution mode.
Write protection is controlled by the GWRP bit in the
Configuration Word. When GWRP is programmed to
‘0’, internal write and erase operations to program
memory are blocked.
DS39951C-page 248
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
25.5.2
CODE SEGMENT PROTECTION
In addition to global General Segment protection, a
separate subrange of the program memory space can
be individually protected against writes and erases.
This area can be used for many purposes where a
separate block of erase and write-protected code is
needed, such as bootloader applications. Unlike
common boot block implementations, the specially
protected segment in the PIC24FJ64GA104 family
devices can be located by the user anywhere in the
program space and configured in a wide range of sizes.
Code segment protection provides an added level of
protection to a designated area of program memory, by
disabling the NVM safety interlock, whenever a write or
erase address falls within a specified range. It does not
override General Segment protection controlled by the
GCP or GWRP bits. For example, if GCP and GWRP
are enabled, enabling segmented code protection for
the bottom half of program memory does not undo
General Segment protection for the top half.
The size and type of protection for the segmented code
range are configured by the WPFPx, WPEND, WPCFG
and WPDIS bits in Configuration Word 3. Code segment protection is enabled by programming the WPDIS
bit (= 0). The WPFP bits specify the size of the segment
to be protected by specifying the 512-word code page
that is the start or end of the protected segment. The
specified region is inclusive, therefore, this page will
also be protected.
A separate bit, WPCFG, is used to independently protect
the last page of program space, including the Flash Configuration Words. Programming WPCFG (= 0) protects
the last page, regardless of the other bit settings. This
may be useful in circumstances where write protection is
needed for both a code segment in the bottom of
memory, as well as the Flash Configuration Words.
The various options for segment code protection are
shown in Table 25-2.
25.5.3
CONFIGURATION REGISTER
PROTECTION
The Configuration registers are protected against
inadvertent or unwanted changes, or reads in two
ways. The primary protection method is the same as
that of the RP registers – shadow registers contain a
complimentary value which is constantly compared
with the actual value.
To safeguard against unpredictable events, Configuration bit changes resulting from individual cell level
disruptions (such as ESD events) will cause a parity
error and trigger a device Reset.
The data for the Configuration registers is derived from
the Flash Configuration Words in program memory.
When the GCP bit is set, the source data for device
configuration is also protected as a consequence. Even
if General Segment protection is not enabled, the
device configuration can be protected by using the
appropriate code cement protection setting.
The WPEND bit determines if the protected segment
uses the top or bottom of the program space as a
boundary. Programming WPEND (= 0) sets the bottom
of program memory (000000h) as the lower boundary
of the protected segment. Leaving WPEND unprogrammed (= 1) protects the specified page through the
last page of implemented program memory, including
the Configuration Word locations.
TABLE 25-2:
SEGMENT CODE PROTECTION CONFIGURATION OPTIONS
Segment Configuration Bits
Write/Erase Protection of Code Segment
WPDIS
WPEND
WPCFG
1
x
1
No additional protection enabled; all program memory protection is configured
by GCP and GWRP
1
x
0
Last code page protected, including Flash Configuration Words
0
1
0
Addresses from the first address of code page are defined by WPFP<5:0>
through the end of implemented program memory (inclusive) are protected,
including Flash Configuration Words
0
0
0
Address, 000000h, through the last address of code page, defined by
WPFP<5:0> (inclusive) is protected
0
1
1
Addresses from first address of code page, defined by WPFP<5:0> through the
end of implemented program memory (inclusive), are protected, including Flash
Configuration Words
0
0
1
Addresses from first address of code page, defined by WPFP<5:0> through the
end of implemented program memory (inclusive), are protected
 2010 Microchip Technology Inc.
DS39951C-page 249
PIC24FJ64GA104 FAMILY
25.6
JTAG Interface
PIC24FJ64GA104 family devices implement a JTAG
interface, which supports boundary scan device
testing.
25.7
In-Circuit Serial Programming
PIC24FJ64GA104 family microcontrollers can be serially programmed while in the end application circuit.
This is simply done with two lines for clock (PGECx)
and data (PGEDx), and three other lines for power,
ground and the programming voltage. This allows
customers to manufacture boards with unprogrammed
devices and then program the microcontroller just
before shipping the product. This also allows the most
recent firmware or a custom firmware to be
programmed.
DS39951C-page 250
25.8
In-Circuit Debugger
When MPLAB® ICD 2 is selected as a debugger, the
in-circuit debugging functionality is enabled. This function allows simple debugging functions when used with
MPLAB IDE. Debugging functionality is controlled
through the PGECx (Emulation/Debug Clock) and
PGEDx (Emulation/Debug Data) pins.
To use the in-circuit debugger function of the device,
the design must implement ICSP connections to
MCLR, VDD, VSS and the PGECx/PGEDx pin pair designated by the ICS Configuration bits. In addition, when
the feature is enabled, some of the resources are not
available for general use. These resources include the
first 80 bytes of data RAM and two I/O pins.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
26.0
DEVELOPMENT SUPPORT
The PIC® microcontrollers and dsPIC® digital signal
controllers are supported with a full range of software
and hardware development tools:
• Integrated Development Environment
- MPLAB® IDE Software
• Compilers/Assemblers/Linkers
- MPLAB C Compiler for Various Device
Families
- HI-TECH C for Various Device Families
- MPASMTM Assembler
- MPLINKTM Object Linker/
MPLIBTM Object Librarian
- MPLAB Assembler/Linker/Librarian for
Various Device Families
• Simulators
- MPLAB SIM Software Simulator
• Emulators
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debuggers
- MPLAB ICD 3
- PICkit™ 3 Debug Express
• Device Programmers
- PICkit™ 2 Programmer
- MPLAB PM3 Device Programmer
• Low-Cost Demonstration/Development Boards,
Evaluation Kits, and Starter Kits
26.1
MPLAB Integrated Development
Environment Software
The MPLAB IDE software brings an ease of software
development previously unseen in the 8/16/32-bit
microcontroller market. The MPLAB IDE is a Windows®
operating system-based application that contains:
• A single graphical interface to all debugging tools
- Simulator
- Programmer (sold separately)
- In-Circuit Emulator (sold separately)
- In-Circuit Debugger (sold separately)
• A full-featured editor with color-coded context
• A multiple project manager
• Customizable data windows with direct edit of
contents
• High-level source code debugging
• Mouse over variable inspection
• Drag and drop variables from source to watch
windows
• Extensive on-line help
• Integration of select third party tools, such as
IAR C Compilers
The MPLAB IDE allows you to:
• Edit your source files (either C or assembly)
• One-touch compile or assemble, and download to
emulator and simulator tools (automatically
updates all project information)
• Debug using:
- Source files (C or assembly)
- Mixed C and assembly
- Machine code
MPLAB IDE supports multiple debugging tools in a
single development paradigm, from the cost-effective
simulators, through low-cost in-circuit debuggers, to
full-featured emulators. This eliminates the learning
curve when upgrading to tools with increased flexibility
and power.
 2010 Microchip Technology Inc.
DS39951C-page 251
PIC24FJ64GA104 FAMILY
26.2
MPLAB C Compilers for Various
Device Families
The MPLAB C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC18,
PIC24 and PIC32 families of microcontrollers and the
dsPIC30 and dsPIC33 families of digital signal controllers. These compilers provide powerful integration
capabilities, superior code optimization and ease of
use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
26.3
HI-TECH C for Various Device
Families
The HI-TECH C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC
family of microcontrollers and the dsPIC family of digital
signal controllers. These compilers provide powerful
integration capabilities, omniscient code generation
and ease of use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
The compilers include a macro assembler, linker, preprocessor, and one-step driver, and can run on multiple
platforms.
26.4
MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for PIC10/12/16/18 MCUs.
The MPASM Assembler generates relocatable object
files for the MPLINK Object Linker, Intel® standard HEX
files, MAP files to detail memory usage and symbol
reference, absolute LST files that contain source lines
and generated machine code and COFF files for
debugging.
The MPASM Assembler features include:
26.5
MPLINK Object Linker/
MPLIB Object Librarian
The MPLINK Object Linker combines relocatable
objects created by the MPASM Assembler and the
MPLAB C18 C Compiler. It can link relocatable objects
from precompiled libraries, using directives from a
linker script.
The MPLIB Object Librarian manages the creation and
modification of library files of precompiled code. When
a routine from a library is called from a source file, only
the modules that contain that routine will be linked in
with the application. This allows large libraries to be
used efficiently in many different applications.
The object linker/library features include:
• Efficient linking of single libraries instead of many
smaller files
• Enhanced code maintainability by grouping
related modules together
• Flexible creation of libraries with easy module
listing, replacement, deletion and extraction
26.6
MPLAB Assembler, Linker and
Librarian for Various Device
Families
MPLAB Assembler produces relocatable machine
code from symbolic assembly language for PIC24,
PIC32 and dsPIC devices. MPLAB C Compiler uses
the assembler to produce its object file. The assembler
generates relocatable object files that can then be
archived or linked with other relocatable object files and
archives to create an executable file. Notable features
of the assembler include:
•
•
•
•
•
•
Support for the entire device instruction set
Support for fixed-point and floating-point data
Command line interface
Rich directive set
Flexible macro language
MPLAB IDE compatibility
• Integration into MPLAB IDE projects
• User-defined macros to streamline
assembly code
• Conditional assembly for multi-purpose
source files
• Directives that allow complete control over the
assembly process
DS39951C-page 252
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
26.7
MPLAB SIM Software Simulator
The MPLAB SIM Software Simulator allows code
development in a PC-hosted environment by simulating the PIC MCUs and dsPIC® DSCs on an instruction
level. On any given instruction, the data areas can be
examined or modified and stimuli can be applied from
a comprehensive stimulus controller. Registers can be
logged to files for further run-time analysis. The trace
buffer and logic analyzer display extend the power of
the simulator to record and track program execution,
actions on I/O, most peripherals and internal registers.
The MPLAB SIM Software Simulator fully supports
symbolic debugging using the MPLAB C Compilers,
and the MPASM and MPLAB Assemblers. The software simulator offers the flexibility to develop and
debug code outside of the hardware laboratory environment, making it an excellent, economical software
development tool.
26.8
MPLAB REAL ICE In-Circuit
Emulator System
MPLAB REAL ICE In-Circuit Emulator System is
Microchip’s next generation high-speed emulator for
Microchip Flash DSC and MCU devices. It debugs and
programs PIC® Flash MCUs and dsPIC® Flash DSCs
with the easy-to-use, powerful graphical user interface of
the MPLAB Integrated Development Environment (IDE),
included with each kit.
The emulator is connected to the design engineer’s PC
using a high-speed USB 2.0 interface and is connected
to the target with either a connector compatible with incircuit debugger systems (RJ11) or with the new highspeed, noise tolerant, Low-Voltage Differential Signal
(LVDS) interconnection (CAT5).
The emulator is field upgradable through future firmware
downloads in MPLAB IDE. In upcoming releases of
MPLAB IDE, new devices will be supported, and new
features will be added. MPLAB REAL ICE offers significant advantages over competitive emulators including
low-cost, full-speed emulation, run-time variable
watches, trace analysis, complex breakpoints, a ruggedized probe interface and long (up to three meters) interconnection cables.
 2010 Microchip Technology Inc.
26.9
MPLAB ICD 3 In-Circuit Debugger
System
MPLAB ICD 3 In-Circuit Debugger System is Microchip's most cost effective high-speed hardware
debugger/programmer for Microchip Flash Digital Signal Controller (DSC) and microcontroller (MCU)
devices. It debugs and programs PIC® Flash microcontrollers and dsPIC® DSCs with the powerful, yet easyto-use graphical user interface of MPLAB Integrated
Development Environment (IDE).
The MPLAB ICD 3 In-Circuit Debugger probe is connected to the design engineer's PC using a high-speed
USB 2.0 interface and is connected to the target with a
connector compatible with the MPLAB ICD 2 or MPLAB
REAL ICE systems (RJ-11). MPLAB ICD 3 supports all
MPLAB ICD 2 headers.
26.10 PICkit 3 In-Circuit Debugger/
Programmer and
PICkit 3 Debug Express
The MPLAB PICkit 3 allows debugging and programming of PIC® and dsPIC® Flash microcontrollers at a
most affordable price point using the powerful graphical
user interface of the MPLAB Integrated Development
Environment (IDE). The MPLAB PICkit 3 is connected
to the design engineer's PC using a full speed USB
interface and can be connected to the target via an
Microchip debug (RJ-11) connector (compatible with
MPLAB ICD 3 and MPLAB REAL ICE). The connector
uses two device I/O pins and the reset line to implement in-circuit debugging and In-Circuit Serial Programming™.
The PICkit 3 Debug Express include the PICkit 3, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
DS39951C-page 253
PIC24FJ64GA104 FAMILY
26.11 PICkit 2 Development
Programmer/Debugger and
PICkit 2 Debug Express
26.13 Demonstration/Development
Boards, Evaluation Kits, and
Starter Kits
The PICkit™ 2 Development Programmer/Debugger is
a low-cost development tool with an easy to use interface for programming and debugging Microchip’s Flash
families of microcontrollers. The full featured
Windows® programming interface supports baseline
(PIC10F,
PIC12F5xx,
PIC16F5xx),
midrange
(PIC12F6xx, PIC16F), PIC18F, PIC24, dsPIC30,
dsPIC33, and PIC32 families of 8-bit, 16-bit, and 32-bit
microcontrollers, and many Microchip Serial EEPROM
products. With Microchip’s powerful MPLAB Integrated
Development Environment (IDE) the PICkit™ 2
enables in-circuit debugging on most PIC® microcontrollers. In-Circuit-Debugging runs, halts and single
steps the program while the PIC microcontroller is
embedded in the application. When halted at a breakpoint, the file registers can be examined and modified.
A wide variety of demonstration, development and
evaluation boards for various PIC MCUs and dsPIC
DSCs allows quick application development on fully functional systems. Most boards include prototyping areas for
adding custom circuitry and provide application firmware
and source code for examination and modification.
The PICkit 2 Debug Express include the PICkit 2, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
26.12 MPLAB PM3 Device Programmer
The MPLAB PM3 Device Programmer is a universal,
CE compliant device programmer with programmable
voltage verification at VDDMIN and VDDMAX for
maximum reliability. It features a large LCD display
(128 x 64) for menus and error messages and a modular, detachable socket assembly to support various
package types. The ICSP™ cable assembly is included
as a standard item. In Stand-Alone mode, the MPLAB
PM3 Device Programmer can read, verify and program
PIC devices without a PC connection. It can also set
code protection in this mode. The MPLAB PM3
connects to the host PC via an RS-232 or USB cable.
The MPLAB PM3 has high-speed communications and
optimized algorithms for quick programming of large
memory devices and incorporates an MMC card for file
storage and data applications.
DS39951C-page 254
The boards support a variety of features, including LEDs,
temperature sensors, switches, speakers, RS-232
interfaces, LCD displays, potentiometers and additional
EEPROM memory.
The demonstration and development boards can be
used in teaching environments, for prototyping custom
circuits and for learning about various microcontroller
applications.
In addition to the PICDEM™ and dsPICDEM™ demonstration/development board series of circuits, Microchip
has a line of evaluation kits and demonstration software
for analog filter design, KEELOQ® security ICs, CAN,
IrDA®, PowerSmart battery management, SEEVAL®
evaluation system, Sigma-Delta ADC, flow rate
sensing, plus many more.
Also available are starter kits that contain everything
needed to experience the specified device. This usually
includes a single application and debug capability, all
on one board.
Check the Microchip web page (www.microchip.com)
for the complete list of demonstration, development
and evaluation kits.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
27.0
Note:
INSTRUCTION SET SUMMARY
This chapter is a brief summary of the
PIC24F instruction set architecture, and is
not intended to be a comprehensive
reference source.
The PIC24F instruction set adds many enhancements
to the previous PIC® MCU instruction sets, while maintaining an easy migration from previous PIC MCU
instruction sets. Most instructions are a single program
memory word. Only three instructions require two
program memory locations.
Each single-word instruction is a 24-bit word divided
into an 8-bit opcode, which specifies the instruction
type and one or more operands, which further specify
the operation of the instruction. The instruction set is
highly orthogonal and is grouped into four basic
categories:
•
•
•
•
Word or byte-oriented operations
Bit-oriented operations
Literal operations
Control operations
• A literal value to be loaded into a W register or file
register (specified by the value of ‘k’)
• The W register or file register where the literal
value is to be loaded (specified by ‘Wb’ or ‘f’)
However, literal instructions that involve arithmetic or
logical operations use some of the following operands:
• The first source operand, which is a register ‘Wb’
without any address modifier
• The second source operand, which is a literal
value
• The destination of the result (only if not the same
as the first source operand), which is typically a
register ‘Wd’ with or without an address modifier
The control instructions may use some of the following
operands:
• A program memory address
• The mode of the table read and table write
instructions
Table 27-1 shows the general symbols used in
describing the instructions. The PIC24F instruction set
summary in Table 27-2 lists all of the instructions, along
with the status flags affected by each instruction.
Most word or byte-oriented W register instructions
(including barrel shift instructions) have three
operands:
• The first source operand, which is typically a
register ‘Wb’ without any address modifier
• The second source operand, which is typically a
register ‘Ws’ with or without an address modifier
• The destination of the result, which is typically a
register ‘Wd’ with or without an address modifier
However, word or byte-oriented file register instructions
have two operands:
• The file register specified by the value, ‘f’
• The destination, which could either be the file
register, ‘f’, or the W0 register, which is denoted
as ‘WREG’
Most bit-oriented instructions (including
rotate/shift instructions) have two operands:
The literal instructions that involve data movement may
use some of the following operands:
simple
All instructions are a single word, except for certain
double-word instructions, which were made
double-word instructions so that all the required information is available in these 48 bits. In the second word,
the 8 MSbs are ‘0’s. If this second word is executed as
an instruction (by itself), it will execute as a NOP.
Most single-word instructions are executed in a single
instruction cycle, unless a conditional test is true or the
program counter is changed as a result of the instruction. In these cases, the execution takes two instruction
cycles, with the additional instruction cycle(s) executed
as a NOP. Notable exceptions are the BRA (unconditional/computed branch), indirect CALL/GOTO, all table
reads and writes, and RETURN/RETFIE instructions,
which are single-word instructions but take two or three
cycles.
Certain instructions that involve skipping over the subsequent instruction require either two or three cycles if
the skip is performed, depending on whether the
instruction being skipped is a single-word or two-word
instruction. Moreover, double-word moves require two
cycles. The double-word instructions execute in two
instruction cycles.
• The W register (with or without an address
modifier) or file register (specified by the value of
‘Ws’ or ‘f’)
• The bit in the W register or file register (specified
by a literal value or indirectly by the contents of
register, ‘Wb’)
 2010 Microchip Technology Inc.
DS39951C-page 255
PIC24FJ64GA104 FAMILY
TABLE 27-1:
SYMBOLS USED IN OPCODE DESCRIPTIONS
Field
Description
#text
Means literal defined by “text”
(text)
Means “content of text”
[text]
Means “the location addressed by text”
{ }
Optional field or operation
<n:m>
Register bit field
.b
Byte mode selection
.d
Double-Word mode selection
.S
Shadow register select
.w
Word mode selection (default)
bit4
4-bit bit selection field (used in word addressed instructions) {0...15}
C, DC, N, OV, Z
MCU Status bits: Carry, Digit Carry, Negative, Overflow, Sticky Zero
Expr
Absolute address, label or expression (resolved by the linker)
f
File register address {0000h...1FFFh}
lit1
1-bit unsigned literal {0,1}
lit4
4-bit unsigned literal {0...15}
lit5
5-bit unsigned literal {0...31}
lit8
8-bit unsigned literal {0...255}
lit10
10-bit unsigned literal {0...255} for Byte mode, {0:1023} for Word mode
lit14
14-bit unsigned literal {0...16383}
lit16
16-bit unsigned literal {0...65535}
lit23
23-bit unsigned literal {0...8388607}; LSB must be ‘0’
None
Field does not require an entry, may be blank
PC
Program Counter
Slit10
10-bit signed literal {-512...511}
Slit16
16-bit signed literal {-32768...32767}
Slit6
6-bit signed literal {-16...16}
Wb
Base W register {W0..W15}
Wd
Destination W register { Wd, [Wd], [Wd++], [Wd--], [++Wd], [--Wd] }
Wdo
Destination W register 
{ Wnd, [Wnd], [Wnd++], [Wnd--], [++Wnd], [--Wnd], [Wnd+Wb] }
Wm,Wn
Dividend, Divisor working register pair (direct addressing)
Wn
One of 16 working registers {W0..W15}
Wnd
One of 16 destination working registers {W0..W15}
Wns
One of 16 source working registers {W0..W15}
WREG
W0 (working register used in file register instructions)
Ws
Source W register { Ws, [Ws], [Ws++], [Ws--], [++Ws], [--Ws] }
Wso
Source W register { Wns, [Wns], [Wns++], [Wns--], [++Wns], [--Wns], [Wns+Wb] }
DS39951C-page 256
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 27-2:
INSTRUCTION SET OVERVIEW
Assembly
Mnemonic
ADD
ADDC
AND
ASR
BCLR
BRA
BSET
BSW
BTG
BTSC
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
ADD
f
f = f + WREG
1
1
C, DC, N, OV, Z
ADD
f,WREG
WREG = f + WREG
1
1
C, DC, N, OV, Z
ADD
#lit10,Wn
Wd = lit10 + Wd
1
1
C, DC, N, OV, Z
ADD
Wb,Ws,Wd
Wd = Wb + Ws
1
1
C, DC, N, OV, Z
ADD
Wb,#lit5,Wd
Wd = Wb + lit5
1
1
C, DC, N, OV, Z
ADDC
f
f = f + WREG + (C)
1
1
C, DC, N, OV, Z
ADDC
f,WREG
WREG = f + WREG + (C)
1
1
C, DC, N, OV, Z
ADDC
#lit10,Wn
Wd = lit10 + Wd + (C)
1
1
C, DC, N, OV, Z
ADDC
Wb,Ws,Wd
Wd = Wb + Ws + (C)
1
1
C, DC, N, OV, Z
ADDC
Wb,#lit5,Wd
Wd = Wb + lit5 + (C)
1
1
C, DC, N, OV, Z
AND
f
f = f .AND. WREG
1
1
N, Z
AND
f,WREG
WREG = f .AND. WREG
1
1
N, Z
AND
#lit10,Wn
Wd = lit10 .AND. Wd
1
1
N, Z
AND
Wb,Ws,Wd
Wd = Wb .AND. Ws
1
1
N, Z
AND
Wb,#lit5,Wd
Wd = Wb .AND. lit5
1
1
N, Z
ASR
f
f = Arithmetic Right Shift f
1
1
C, N, OV, Z
ASR
f,WREG
WREG = Arithmetic Right Shift f
1
1
C, N, OV, Z
ASR
Ws,Wd
Wd = Arithmetic Right Shift Ws
1
1
C, N, OV, Z
ASR
Wb,Wns,Wnd
Wnd = Arithmetic Right Shift Wb by Wns
1
1
N, Z
ASR
Wb,#lit5,Wnd
Wnd = Arithmetic Right Shift Wb by lit5
1
1
N, Z
BCLR
f,#bit4
Bit Clear f
1
1
None
BCLR
Ws,#bit4
Bit Clear Ws
1
1
None
BRA
C,Expr
Branch if Carry
1
1 (2)
None
BRA
GE,Expr
Branch if Greater than or Equal
1
1 (2)
None
BRA
GEU,Expr
Branch if Unsigned Greater than or Equal
1
1 (2)
None
BRA
GT,Expr
Branch if Greater than
1
1 (2)
None
BRA
GTU,Expr
Branch if Unsigned Greater than
1
1 (2)
None
BRA
LE,Expr
Branch if Less than or Equal
1
1 (2)
None
BRA
LEU,Expr
Branch if Unsigned Less than or Equal
1
1 (2)
None
BRA
LT,Expr
Branch if Less than
1
1 (2)
None
BRA
LTU,Expr
Branch if Unsigned Less than
1
1 (2)
None
BRA
N,Expr
Branch if Negative
1
1 (2)
None
BRA
NC,Expr
Branch if Not Carry
1
1 (2)
None
BRA
NN,Expr
Branch if Not Negative
1
1 (2)
None
BRA
NOV,Expr
Branch if Not Overflow
1
1 (2)
None
BRA
NZ,Expr
Branch if Not Zero
1
1 (2)
None
BRA
OV,Expr
Branch if Overflow
1
1 (2)
None
BRA
Expr
Branch Unconditionally
1
2
None
BRA
Z,Expr
Branch if Zero
1
1 (2)
None
BRA
Wn
Computed Branch
1
2
None
BSET
f,#bit4
Bit Set f
1
1
None
BSET
Ws,#bit4
Bit Set Ws
1
1
None
BSW.C
Ws,Wb
Write C bit to Ws<Wb>
1
1
None
BSW.Z
Ws,Wb
Write Z bit to Ws<Wb>
1
1
None
BTG
f,#bit4
Bit Toggle f
1
1
None
BTG
Ws,#bit4
Bit Toggle Ws
1
1
None
BTSC
f,#bit4
Bit Test f, Skip if Clear
1
1
None
(2 or 3)
BTSC
Ws,#bit4
Bit Test Ws, Skip if Clear
1
1
None
(2 or 3)
 2010 Microchip Technology Inc.
DS39951C-page 257
PIC24FJ64GA104 FAMILY
TABLE 27-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
BTSS
BTST
BTSTS
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
BTSS
f,#bit4
Bit Test f, Skip if Set
1
1
None
(2 or 3)
BTSS
Ws,#bit4
Bit Test Ws, Skip if Set
1
1
None
(2 or 3)
BTST
f,#bit4
Bit Test f
1
1
Z
BTST.C
Ws,#bit4
Bit Test Ws to C
1
1
C
BTST.Z
Ws,#bit4
Bit Test Ws to Z
1
1
Z
BTST.C
Ws,Wb
Bit Test Ws<Wb> to C
1
1
C
Z
BTST.Z
Ws,Wb
Bit Test Ws<Wb> to Z
1
1
BTSTS
f,#bit4
Bit Test then Set f
1
1
Z
BTSTS.C
Ws,#bit4
Bit Test Ws to C, then Set
1
1
C
BTSTS.Z
Ws,#bit4
Bit Test Ws to Z, then Set
1
1
Z
CALL
CALL
lit23
Call Subroutine
2
2
None
CALL
Wn
Call Indirect Subroutine
1
2
None
CLR
CLR
f
f = 0x0000
1
1
None
CLR
WREG
WREG = 0x0000
1
1
None
CLR
Ws
Ws = 0x0000
1
1
None
Clear Watchdog Timer
1
1
WDTO, Sleep
CLRWDT
CLRWDT
COM
COM
f
f=f
1
1
N, Z
COM
f,WREG
WREG = f
1
1
N, Z
COM
Ws,Wd
Wd = Ws
1
1
N, Z
CP
f
Compare f with WREG
1
1
C, DC, N, OV, Z
CP
Wb,#lit5
Compare Wb with lit5
1
1
C, DC, N, OV, Z
CP
Wb,Ws
Compare Wb with Ws (Wb – Ws)
1
1
C, DC, N, OV, Z
CP0
CP0
f
Compare f with 0x0000
1
1
C, DC, N, OV, Z
CP0
Ws
Compare Ws with 0x0000
1
1
C, DC, N, OV, Z
CPB
CPB
f
Compare f with WREG, with Borrow
1
1
C, DC, N, OV, Z
CPB
Wb,#lit5
Compare Wb with lit5, with Borrow
1
1
C, DC, N, OV, Z
CPB
Wb,Ws
Compare Wb with Ws, with Borrow
(Wb – Ws – C)
1
1
C, DC, N, OV, Z
CPSEQ
CPSEQ
Wb,Wn
Compare Wb with Wn, Skip if =
1
1
None
(2 or 3)
CPSGT
CPSGT
Wb,Wn
Compare Wb with Wn, Skip if >
1
1
None
(2 or 3)
CPSLT
CPSLT
Wb,Wn
Compare Wb with Wn, Skip if <
1
1
None
(2 or 3)
CPSNE
CPSNE
Wb,Wn
Compare Wb with Wn, Skip if 
1
1
None
(2 or 3)
DAW
DAW.B
Wn
Wn = Decimal Adjust Wn
1
1
DEC
DEC
f
f=f–1
1
1
C, DC, N, OV, Z
DEC
f,WREG
WREG = f – 1
1
1
C, DC, N, OV, Z
CP
C
DEC
Ws,Wd
Wd = Ws – 1
1
1
C, DC, N, OV, Z
DEC2
f
f=f–2
1
1
C, DC, N, OV, Z
DEC2
f,WREG
WREG = f – 2
1
1
C, DC, N, OV, Z
DEC2
Ws,Wd
Wd = Ws – 2
1
1
C, DC, N, OV, Z
DISI
DISI
#lit14
Disable Interrupts for k Instruction Cycles
1
1
None
DIV
DIV.SW
Wm,Wn
Signed 16/16-bit Integer Divide
1
18
N, Z, C, OV
DIV.SD
Wm,Wn
Signed 32/16-bit Integer Divide
1
18
N, Z, C, OV
DIV.UW
Wm,Wn
Unsigned 16/16-bit Integer Divide
1
18
N, Z, C, OV
DIV.UD
Wm,Wn
Unsigned 32/16-bit Integer Divide
1
18
N, Z, C, OV
EXCH
EXCH
Wns,Wnd
Swap Wns with Wnd
1
1
None
FF1L
FF1L
Ws,Wnd
Find First One from Left (MSb) Side
1
1
C
FF1R
FF1R
Ws,Wnd
Find First One from Right (LSb) Side
1
1
C
DEC2
DS39951C-page 258
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 27-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
GOTO
INC
INC2
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
GOTO
Expr
Go to Address
2
2
None
GOTO
Wn
Go to Indirect
1
2
None
INC
f
f=f+1
1
1
C, DC, N, OV, Z
INC
f,WREG
WREG = f + 1
1
1
C, DC, N, OV, Z
C, DC, N, OV, Z
INC
Ws,Wd
Wd = Ws + 1
1
1
INC2
f
f=f+2
1
1
C, DC, N, OV, Z
INC2
f,WREG
WREG = f + 2
1
1
C, DC, N, OV, Z
C, DC, N, OV, Z
INC2
Ws,Wd
Wd = Ws + 2
1
1
IOR
f
f = f .IOR. WREG
1
1
N, Z
IOR
f,WREG
WREG = f .IOR. WREG
1
1
N, Z
IOR
#lit10,Wn
Wd = lit10 .IOR. Wd
1
1
N, Z
IOR
Wb,Ws,Wd
Wd = Wb .IOR. Ws
1
1
N, Z
IOR
Wb,#lit5,Wd
Wd = Wb .IOR. lit5
1
1
N, Z
LNK
LNK
#lit14
Link Frame Pointer
1
1
None
LSR
LSR
f
f = Logical Right Shift f
1
1
C, N, OV, Z
LSR
f,WREG
WREG = Logical Right Shift f
1
1
C, N, OV, Z
LSR
Ws,Wd
Wd = Logical Right Shift Ws
1
1
C, N, OV, Z
LSR
Wb,Wns,Wnd
Wnd = Logical Right Shift Wb by Wns
1
1
N, Z
LSR
Wb,#lit5,Wnd
Wnd = Logical Right Shift Wb by lit5
1
1
N, Z
MOV
f,Wn
Move f to Wn
1
1
None
MOV
[Wns+Slit10],Wnd
Move [Wns + Slit10] to Wnd
1
1
None
MOV
f
Move f to f
1
1
N, Z
MOV
f,WREG
Move f to WREG
1
1
N, Z
MOV
#lit16,Wn
Move 16-bit Literal to Wn
1
1
None
MOV.b
#lit8,Wn
Move 8-bit Literal to Wn
1
1
None
MOV
Wn,f
Move Wn to f
1
1
None
MOV
Wns,[Wns+Slit10]
Move Wns to [Wns + Slit10]
1
1
MOV
Wso,Wdo
Move Ws to Wd
1
1
None
MOV
WREG,f
Move WREG to f
1
1
N, Z
MOV.D
Wns,Wd
Move Double from W(ns):W(ns + 1) to Wd
1
2
None
MOV.D
Ws,Wnd
Move Double from Ws to W(nd + 1):W(nd)
1
2
None
MUL.SS
Wb,Ws,Wnd
{Wnd + 1, Wnd} = Signed(Wb) * Signed(Ws)
1
1
None
MUL.SU
Wb,Ws,Wnd
{Wnd + 1, Wnd} = Signed(Wb) * Unsigned(Ws)
1
1
None
MUL.US
Wb,Ws,Wnd
{Wnd + 1, Wnd} = Unsigned(Wb) * Signed(Ws)
1
1
None
MUL.UU
Wb,Ws,Wnd
{Wnd + 1, Wnd} = Unsigned(Wb) * Unsigned(Ws)
1
1
None
MUL.SU
Wb,#lit5,Wnd
{Wnd + 1, Wnd} = Signed(Wb) * Unsigned(lit5)
1
1
None
MUL.UU
Wb,#lit5,Wnd
{Wnd + 1, Wnd} = Unsigned(Wb) * Unsigned(lit5)
1
1
None
MUL
f
W3:W2 = f * WREG
1
1
None
NEG
f
f=f+1
1
1
C, DC, N, OV, Z
NEG
f,WREG
WREG = f + 1
1
1
C, DC, N, OV, Z
NEG
Ws,Wd
IOR
MOV
MUL
NEG
NOP
POP
Wd = Ws + 1
1
1
C, DC, N, OV, Z
NOP
No Operation
1
1
None
NOPR
No Operation
1
1
None
POP
f
Pop f from Top-of-Stack (TOS)
1
1
None
POP
Wdo
Pop from Top-of-Stack (TOS) to Wdo
1
1
None
POP.D
Wnd
Pop from Top-of-Stack (TOS) to W(nd):W(nd + 1)
1
2
None
Pop Shadow Registers
1
1
All
POP.S
PUSH
PUSH
f
Push f to Top-of-Stack (TOS)
1
1
None
PUSH
Wso
Push Wso to Top-of-Stack (TOS)
1
1
None
PUSH.D
Wns
Push W(ns):W(ns + 1) to Top-of-Stack (TOS)
1
2
None
Push Shadow Registers
1
1
None
PUSH.S
 2010 Microchip Technology Inc.
DS39951C-page 259
PIC24FJ64GA104 FAMILY
TABLE 27-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
PWRSAV
PWRSAV
#lit1
Go into Sleep or Idle mode
1
1
WDTO, Sleep
RCALL
RCALL
Expr
Relative Call
1
2
None
RCALL
Wn
Computed Call
1
2
None
REPEAT
REPEAT
#lit14
Repeat Next Instruction lit14 + 1 times
1
1
None
REPEAT
Wn
Repeat Next Instruction (Wn) + 1 times
1
1
None
RESET
RESET
Software Device Reset
1
1
None
RETFIE
RETFIE
Return from Interrupt
1
3 (2)
None
RETLW
RETLW
Return with Literal in Wn
1
3 (2)
None
RETURN
RETURN
Return from Subroutine
1
3 (2)
None
RLC
RLC
f
f = Rotate Left through Carry f
1
1
C, N, Z
RLC
f,WREG
WREG = Rotate Left through Carry f
1
1
C, N, Z
C, N, Z
RLNC
RRC
RRNC
#lit10,Wn
RLC
Ws,Wd
Wd = Rotate Left through Carry Ws
1
1
RLNC
f
f = Rotate Left (No Carry) f
1
1
N, Z
RLNC
f,WREG
WREG = Rotate Left (No Carry) f
1
1
N, Z
N, Z
RLNC
Ws,Wd
Wd = Rotate Left (No Carry) Ws
1
1
RRC
f
f = Rotate Right through Carry f
1
1
C, N, Z
RRC
f,WREG
WREG = Rotate Right through Carry f
1
1
C, N, Z
RRC
Ws,Wd
Wd = Rotate Right through Carry Ws
1
1
C, N, Z
RRNC
f
f = Rotate Right (No Carry) f
1
1
N, Z
RRNC
f,WREG
WREG = Rotate Right (No Carry) f
1
1
N, Z
RRNC
Ws,Wd
Wd = Rotate Right (No Carry) Ws
1
1
N, Z
SE
SE
Ws,Wnd
Wnd = Sign-Extended Ws
1
1
C, N, Z
SETM
SETM
f
f = FFFFh
1
1
None
SETM
WREG
WREG = FFFFh
1
1
None
SETM
Ws
Ws = FFFFh
1
1
None
SL
f
f = Left Shift f
1
1
C, N, OV, Z
SL
f,WREG
WREG = Left Shift f
1
1
C, N, OV, Z
SL
Ws,Wd
Wd = Left Shift Ws
1
1
C, N, OV, Z
SL
Wb,Wns,Wnd
Wnd = Left Shift Wb by Wns
1
1
N, Z
SL
Wb,#lit5,Wnd
Wnd = Left Shift Wb by lit5
1
1
N, Z
SUB
f
f = f – WREG
1
1
C, DC, N, OV, Z
SUB
f,WREG
WREG = f – WREG
1
1
C, DC, N, OV, Z
SUB
#lit10,Wn
Wn = Wn – lit10
1
1
C, DC, N, OV, Z
SUB
Wb,Ws,Wd
Wd = Wb – Ws
1
1
C, DC, N, OV, Z
SUB
Wb,#lit5,Wd
Wd = Wb – lit5
1
1
C, DC, N, OV, Z
SUBB
f
f = f – WREG – (C)
1
1
C, DC, N, OV, Z
SUBB
f,WREG
WREG = f – WREG – (C)
1
1
C, DC, N, OV, Z
SUBB
#lit10,Wn
Wn = Wn – lit10 – (C)
1
1
C, DC, N, OV, Z
SUBB
Wb,Ws,Wd
Wd = Wb – Ws – (C)
1
1
C, DC, N, OV, Z
SL
SUB
SUBB
SUBR
SUBBR
SWAP
SUBB
Wb,#lit5,Wd
Wd = Wb – lit5 – (C)
1
1
C, DC, N, OV, Z
SUBR
f
f = WREG – f
1
1
C, DC, N, OV, Z
SUBR
f,WREG
WREG = WREG – f
1
1
C, DC, N, OV, Z
SUBR
Wb,Ws,Wd
Wd = Ws – Wb
1
1
C, DC, N, OV, Z
C, DC, N, OV, Z
SUBR
Wb,#lit5,Wd
Wd = lit5 – Wb
1
1
SUBBR
f
f = WREG – f – (C)
1
1
C, DC, N, OV, Z
SUBBR
f,WREG
WREG = WREG – f – (C)
1
1
C, DC, N, OV, Z
SUBBR
Wb,Ws,Wd
Wd = Ws – Wb – (C)
1
1
C, DC, N, OV, Z
SUBBR
Wb,#lit5,Wd
Wd = lit5 – Wb – (C)
1
1
C, DC, N, OV, Z
SWAP.b
Wn
Wn = Nibble Swap Wn
1
1
None
SWAP
Wn
Wn = Byte Swap Wn
1
1
None
DS39951C-page 260
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 27-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
TBLRDH
TBLRDH
Ws,Wd
Read Prog<23:16> to Wd<7:0>
1
2
TBLRDL
TBLRDL
Ws,Wd
Read Prog<15:0> to Wd
1
2
None
TBLWTH
TBLWTH
Ws,Wd
Write Ws<7:0> to Prog<23:16>
1
2
None
TBLWTL
TBLWTL
Ws,Wd
Write Ws to Prog<15:0>
1
2
None
ULNK
ULNK
Unlink Frame Pointer
1
1
None
XOR
XOR
f
f = f .XOR. WREG
1
1
N, Z
XOR
f,WREG
WREG = f .XOR. WREG
1
1
N, Z
XOR
#lit10,Wn
Wd = lit10 .XOR. Wd
1
1
N, Z
XOR
Wb,Ws,Wd
Wd = Wb .XOR. Ws
1
1
N, Z
XOR
Wb,#lit5,Wd
Wd = Wb .XOR. lit5
1
1
N, Z
ZE
Ws,Wnd
Wnd = Zero-Extend Ws
1
1
C, Z, N
ZE
 2010 Microchip Technology Inc.
None
DS39951C-page 261
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 262
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
28.0
ELECTRICAL CHARACTERISTICS
This section provides an overview of the PIC24FJ64GA104 family electrical characteristics. Additional information will
be provided in future revisions of this document as it becomes available.
Absolute maximum ratings for the PIC24FJ64GA104 family are listed below. Exposure to these maximum rating
conditions for extended periods may affect device reliability. Functional operation of the device at these, or any other
conditions above the parameters indicated in the operation listings of this specification, is not implied.
Absolute Maximum Ratings(†)
Ambient temperature under bias.............................................................................................................-40°C to +135°C
Storage temperature .............................................................................................................................. -65°C to +150°C
Voltage on VDD with respect to VSS ......................................................................................................... -0.3V to +4.0V
Voltage on any combined analog and digital pin, and MCLR, with respect to VSS ........................ -0.3V to (VDD + 0.3V)
Voltage on any digital only pin with respect to VSS .................................................................................. -0.3V to +6.0V
Voltage on VDDCORE with respect to VSS ................................................................................................. -0.3V to +3.0V
Maximum current out of VSS pin ...........................................................................................................................300 mA
Maximum current into VDD pin (Note 1)................................................................................................................250 mA
Maximum output current sunk by any I/O pin..........................................................................................................25 mA
Maximum output current sourced by any I/O pin ....................................................................................................25 mA
Maximum current sunk by all ports .......................................................................................................................200 mA
Maximum current sourced by all ports (Note 1)....................................................................................................200 mA
Note 1: Maximum allowable current is a function of device maximum power dissipation (see Table 28-1).
NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
 2010 Microchip Technology Inc.
DS39951C-page 263
PIC24FJ64GA104 FAMILY
28.1
DC Characteristics
FIGURE 28-1:
PIC24FJ64GA104 FAMILY VOLTAGE/FREQUENCY GRAPH (INDUSTRIAL)
3.00V
Voltage (VDDCORE)(1)
2.75V
2.75V
2.50V
PIC24FJ64GA104 Family
2.35V
2.35V
2.00V
16 MHz
Frequency
32 MHz
For frequencies between 16 MHz and 32 MHz, FMAX = (45.7 MHz/V) * (VDDCORE – 2V) + 16 MHz.
When the voltage regulator is disabled, VDD and VDDCORE must be maintained so that
VDDCOREVDD3.6V.
Note 1:
FIGURE 28-2:
PIC24FJ64GA104 FAMILY VOLTAGE/FREQUENCY GRAPH
(EXTENDED TEMPERATURE)
3.00V
Voltage
(VDDCORE)(1)
2.75V
2.50V
2.75V
PIC24FJ64GA104 Family
2.35V
2.25V
2.00V
16 MHz
24 MHz
Frequency
For frequencies between 16 MHz and 24 MHz, FMAX = (22.9 MHz/V) * (VDDCORE – 2V) + 16 MHz.
Note 1:
DS39951C-page 264
When the voltage regulator is disabled, VDD and VDDCORE must be maintained so that
VDDCOREVDD3.6V.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-1:
THERMAL OPERATING CONDITIONS
Rating
Symbol
Min
Typ
Max
Unit
Operating Junction Temperature Range
TJ
-40
—
+140
°C
Operating Ambient Temperature Range
TA
-40
—
+125
°C
PIC24FJ64GA104 Family:
Power Dissipation:
Internal Chip Power Dissipation:
PINT = VDD x (IDD –  IOH)
PD
PINT + PI/O
W
PDMAX
(TJ – TA)/JA
W
I/O Pin Power Dissipation:
PI/O =  ({VDD – VOH} x IOH) +  (VOL x IOL)
Maximum Allowed Power Dissipation
TABLE 28-2:
THERMAL PACKAGING CHARACTERISTICS
Characteristic
Package Thermal Resistance, 300 mil SOIC
Symbol
Typ
Max
Unit
Notes
JA
49
—
°C/W
(Note 1)
Package Thermal Resistance, 6x6x0.9 mm QFN
JA
33.7
—
°C/W
(Note 1)
Package Thermal Resistance, 8x8x1 mm QFN
JA
28
—
°C/W
(Note 1)
Package Thermal Resistance, 10x10x1 mm TQFP
JA
39.3
—
°C/W
(Note 1)
Note 1:
Junction to ambient thermal resistance; Theta-JA (JA) numbers are achieved by package simulations.
 2010 Microchip Technology Inc.
DS39951C-page 265
PIC24FJ64GA104 FAMILY
TABLE 28-3:
DC CHARACTERISTICS: TEMPERATURE AND VOLTAGE SPECIFICATIONS
DC CHARACTERISTICS
Param
Symbol
No.
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
Min
Typ(1)
Max
Units
VDD
2.2
—
3.6
V
Regulator enabled
VDD
VDDCORE
—
3.6
V
Regulator disabled
2.0
—
2.75
V
Regulator disabled
Characteristic
Conditions
Operating Voltage
DC10
Supply Voltage
VDDCORE
DC12
VDR
RAM Data Retention
Voltage(2)
1.5
—
—
V
DC16
VPOR
VDD Start Voltage
to Ensure Internal
Power-on Reset Signal
VSS
—
—
V
DC17
SVDD
VDD Rise Rate
to Ensure Internal
Power-on Reset Signal
0.05
—
—
V/ms
DC18
VBOR
Brown-out Reset
Voltage
—
2.05
—
V
Note 1:
2:
0-3.3V in 0.1s
0-2.5V in 60 ms
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
This is the limit to which VDD can be lowered without losing RAM data.
DS39951C-page 266
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-4:
DC CHARACTERISTICS: OPERATING CURRENT (IDD)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Parameter
No.
Typical(1)
Max
Units
Conditions
Operating Current (IDD)(2)
DC21
0.24
0.395
mA
-40°C
DC21a
0.25
0.395
mA
+25°C
DC21b
0.25
0.395
mA
+85°C
DC21f
0.3
0.395
mA
+125°C
DC21c
0.44
0.78
mA
-40°C
DC21d
0.41
0.78
mA
+25°C
DC21e
0.41
0.78
mA
+85°C
DC21g
0.6
0.78
mA
+125°C
DC20
0.5
0.75
mA
-40°C
DC20a
0.5
0.75
mA
+25°C
DC20b
0.5
0.75
mA
+85°C
DC20c
0.6
0.75
mA
+125°C
DC20d
0.75
1.4
mA
-40°C
DC20e
0.75
1.4
mA
+25°C
DC20f
0.75
1.4
mA
+85°C
DC20g
1.0
1.4
mA
+125°C
DC23
2.0
3.0
mA
-40°C
DC23a
2.0
3.0
mA
+25°C
DC23b
2.0
3.0
mA
+85°C
DC23c
2.4
3.0
mA
+125°C
DC23d
2.9
4.2
mA
-40°C
DC23e
2.9
4.2
mA
+25°C
DC23f
2.9
4.2
mA
+85°C
3.5
4.2
mA
+125°C
DC23g
Note 1:
2:
3:
4:
2.0V(3)
0.5 MIPS
3.3V(4)
2.0V(3)
1 MIPS
3.3V(4)
2.0V(3)
4 MIPS
3.3V(4)
Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O pin
loading and switching rate, oscillator type, internal code execution pattern and temperature, also have an
impact on the current consumption. The test conditions for all IDD measurements are as follows: OSCI driven
with external square wave from rail to rail. All I/O pins are configured as inputs and pulled to VDD.
MCLR = VDD; WDT and FSCM are disabled. CPU, SRAM, program memory and data memory are
operational. No peripheral modules are operating and all of the Peripheral Module Disable (PMD) bits are set.
On-chip voltage regulator is disabled (DISVREG is tied to VDD).
On-chip voltage regulator is enabled (DISVREG is tied to VSS). Low-Voltage Detect (LVD) and Brown-out
Detect (BOD) are enabled.
 2010 Microchip Technology Inc.
DS39951C-page 267
PIC24FJ64GA104 FAMILY
TABLE 28-4:
DC CHARACTERISTICS: OPERATING CURRENT (IDD) (CONTINUED)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Parameter
No.
Typical(1)
Max
Units
Conditions
Operating Current (IDD)(2)
DC24
10.5
15.5
mA
-40°C
DC24a
10.5
15.5
mA
+25°C
DC24b
10.5
15.5
mA
+85°C
DC24c
11.3
15.5
mA
+125°C
DC24d
11.3
15.5
mA
-40°C
DC24e
11.3
15.5
mA
+25°C
DC24f
11.3
15.5
mA
+85°C
DC24g
11.3
15.5
mA
+125°C
DC31
15.0
18.0
A
-40°C
DC31a
15.0
19.0
A
+25°C
DC31b
20.0
36.0
A
+85°C
DC31c
42.0
55.0
A
+125°C
DC31d
57.0
120.0
A
-40°C
DC31e
57.0
125.0
A
+25°C
DC31f
95.0
160.0
A
+85°C
114.0
180.0
A
+125°C
DC31g
Note 1:
2:
3:
4:
2.5V(3)
16 MIPS
3.3V(4)
2.0V(3)
LPRC (31 kHz)
3.3V(4)
Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O pin
loading and switching rate, oscillator type, internal code execution pattern and temperature, also have an
impact on the current consumption. The test conditions for all IDD measurements are as follows: OSCI driven
with external square wave from rail to rail. All I/O pins are configured as inputs and pulled to VDD.
MCLR = VDD; WDT and FSCM are disabled. CPU, SRAM, program memory and data memory are
operational. No peripheral modules are operating and all of the Peripheral Module Disable (PMD) bits are set.
On-chip voltage regulator is disabled (DISVREG is tied to VDD).
On-chip voltage regulator is enabled (DISVREG is tied to VSS). Low-Voltage Detect (LVD) and Brown-out
Detect (BOD) are enabled.
DS39951C-page 268
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-5:
DC CHARACTERISTICS: IDLE CURRENT (IIDLE)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
DC CHARACTERISTICS
Parameter
No.
Typical(1)
-40°C  TA  +125°C for Extended
Max
Units
Conditions
Idle Current (IIDLE)(2)
DC41
67
100
A
-40°C
DC41a
68
100
A
+25°C
DC41b
74
100
A
+85°C
DC41f
102
120
A
+125°C
DC41c
166
265
A
-40°C
DC41d
167
265
A
+25°C
DC41e
177
265
A
+85°C
DC41g
225
285
A
+125°C
DC40
125
180
A
-40°C
DC40a
125
180
A
+25°C
DC40b
125
180
A
+85°C
DC40c
167
200
A
+125°C
DC40d
210
350
A
-40°C
DC40e
210
350
A
+25°C
DC40f
210
350
A
+85°C
DC40g
305
370
A
+125°C
DC43
0.5
0.6
mA
-40°C
DC43a
0.5
0.6
mA
+25°C
DC43b
0.5
0.6
mA
+85°C
DC43c
0.54
0.62
mA
+125°C
DC43d
0.75
0.95
mA
-40°C
DC43e
0.75
0.95
mA
+25°C
DC43f
0.75
0.95
mA
+85°C
DC43g
0.8
0.97
mA
+125°C
DC47
2.6
3.3
mA
-40°C
DC47a
2.6
3.3
mA
+25°C
DC47b
2.6
3.3
mA
+85°C
DC47f
2.7
3.4
mA
+125°C
DC47c
2.9
3.5
mA
-40°C
DC47d
2.9
3.5
mA
+25°C
DC47e
2.9
3.5
mA
+85°C
3.0
3.6
mA
+125°C
DC47g
Note 1:
2:
3:
4:
2.0V(3)
0.5 MIPS
3.3V(4)
2.0V(3)
1 MIPS
3.3V(4)
2.0V(3)
4 MIPS
3.3V(4)
2.5V(3)
16 MIPS
3.3V(4)
Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and
are not tested.
Base IIDLE current is measured with the core off, OSCI driven with external square wave from rail to rail. All I/O
pins are configured as inputs and pulled to VDD. MCLR = VDD; WDT and FSCM are disabled. No peripheral
modules are operating and all of the Peripheral Module Disable (PMD) bits are set.
On-chip voltage regulator is disabled (DISVREG is tied to VDD).
On-chip voltage regulator is enabled (DISVREG is tied to VSS). Low-Voltage Detect (LVD) and Brown-out Detect
(BOD) are enabled.
 2010 Microchip Technology Inc.
DS39951C-page 269
PIC24FJ64GA104 FAMILY
TABLE 28-5:
DC CHARACTERISTICS: IDLE CURRENT (IIDLE) (CONTINUED)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
DC CHARACTERISTICS
Parameter
No.
Typical(1)
-40°C  TA  +125°C for Extended
Max
Units
Conditions
Idle Current (IIDLE)(2)
DC50
0.8
1.0
mA
-40°C
DC50a
0.8
1.0
mA
+25°C
DC50b
0.8
1.0
mA
+85°C
DC50c
0.9
1.1
mA
+125°C
DC50d
1.1
1.3
mA
-40°C
DC50e
1.1
1.3
mA
+25°C
DC50f
1.1
1.3
mA
+85°C
DC50g
1.2
1.4
mA
+125°C
DC51
2.4
8.0
A
-40°C
DC51a
2.2
8.0
A
+25°C
DC51b
7.2
21
A
+85°C
DC51c
35
50
A
+125°C
DC51d
38
55
A
-40°C
DC51e
44
60
A
+25°C
DC51f
70
100
A
+85°C
DC51g
96
150
A
+125°C
Note 1:
2:
3:
4:
2.0V(3)
FRC (4 MIPS)
3.3V(4)
2.0V(3)
LPRC (31 kHz)
3.3V(4)
Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and
are not tested.
Base IIDLE current is measured with the core off, OSCI driven with external square wave from rail to rail. All I/O
pins are configured as inputs and pulled to VDD. MCLR = VDD; WDT and FSCM are disabled. No peripheral
modules are operating and all of the Peripheral Module Disable (PMD) bits are set.
On-chip voltage regulator is disabled (DISVREG is tied to VDD).
On-chip voltage regulator is enabled (DISVREG is tied to VSS). Low-Voltage Detect (LVD) and Brown-out Detect
(BOD) are enabled.
DS39951C-page 270
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-6:
DC CHARACTERISTICS: POWER-DOWN BASE CURRENT (IPD)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Parameter
No.
Typical(1)
Max
Units
1.0
A
Conditions
Power-Down Current (IPD)(2)
DC60
0.05
-40°C
DC60a
0.2
1.0
A
+25°C
DC60i
2.0
6.5
A
+60°C
DC60b
3.5
12
A
+85°C
DC60m
29.9
50
A
+125°C
DC60c
0.1
1.0
A
-40°C
DC60d
0.4
1.0
A
+25°C
DC60j
2.5
15
A
+60°C
DC60e
4.2
25
A
+85°C
DC60n
36.2
75
A
+125°C
DC60f
3.3
9.0
A
-40°C
DC60g
3.3
10
A
+25°C
DC60k
5.0
20
A
+60°C
DC60h
7.0
30
A
+85°C
DC60p
39.2
80
A
+125°C
DC70c
0.003
0.2
A
-40°C
DC70d
0.02
0.2
A
+25°C
DC70j
0.2
0.35
A
+60°C
DC70e
0.51
1.5
A
+85°C
DC70a
6.1
12
A
+125°C
DC70f
0.01
0.3
A
-40°C
DC70g
0.04
0.3
A
+25°C
DC70k
0.2
0.5
A
+60°C
DC70h
0.71
2.0
A
+85°C
DC70b
7.2
16
A
+125°C
Note 1:
2:
3:
4:
5:
2.0V(3)
2.5V(3)
Base Power-Down Current(5)
3.3V(4)
2.5V(4)
Base Deep Sleep Current
3.3V(4)
Data in the Typical column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
Base IPD is measured with the device in Sleep mode (all peripherals and clocks shut down). All I/Os are
configured as inputs and pulled high. WDT, etc., are all switched off, PMSLP bit is clear and the Peripheral
Module Disable (PMD) bits for all unused peripherals are set.
On-chip voltage regulator is disabled (DISVREG is tied to VDD).
On-chip voltage regulator is enabled (DISVREG is tied to VSS). Low-Voltage Detect (LVD) and Brown-out
Detect (BOD) are enabled.
The  current is the additional current consumed when the module is enabled. This current should be
added to the base IPD current.
 2010 Microchip Technology Inc.
DS39951C-page 271
PIC24FJ64GA104 FAMILY
TABLE 28-7:
DC CHARACTERISTICS: POWER-DOWN PERIPHERAL
MODULE CURRENT (IPD)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Parameter
No.
Typical(1)
Max
Units
Conditions
 Power-Down Current (IPD): PMD Bits are Set, PMSLP Bit is ‘0’(2)
DC61
0.2
0.7
A
-40°C
DC61a
0.2
0.7
A
+25°C
DC61i
0.2
0.7
A
+60°C
DC61b
0.23
0.7
A
+85°C
+125°C
DC61m
0.3
1.0
A
DC61c
0.25
0.9
A
-40°C
DC61d
0.25
0.9
A
+25°C
DC61j
0.25
0.9
A
+60°C
DC61e
0.28
0.9
A
+85°C
DC61p
0.5
1.2
A
+125°C
DC61f
0.6
1.5
A
-40°C
DC61g
0.6
1.5
A
+25°C
DC61k
0.6
1.5
A
+60°C
DC61h
0.8
1.5
A
+85°C
DC61n
1.0
1.7
A
+125°C
DC62
0.5
1.0
A
-40°C
DC62a
0.5
1.0
A
+25°C
DC62i
0.5
1.0
A
+60°C
DC62b
0.5
1.3
A
+85°C
DC62m
0.6
1.6
A
+125°C
DC62c
0.7
1.5
A
-40°C
DC62d
0.7
1.5
A
+25°C
DC62j
0.7
1.5
A
+60°C
DC62e
0.7
1.8
A
+85°C
DC62n
0.8
2.1
A
+125°C
DC62f
1.5
2.0
A
-40°C
DC62g
1.5
2.0
A
+25°C
DC62k
1.5
2.0
A
+60°C
DC62h
1.5
2.5
A
+85°C
1.9
3.0
A
+125°C
DC62p
Note 1:
2:
3:
4:
5:
2.0V(3)
2.5V(3)
31 kHz LPRC Oscillator with
RTCC, WDT, DSWDT or
Timer 1: ILPRC(5)
3.3V(4)
2.0V(3)
2.5V(3)
Low drive strength, 32 kHz Crystal
with RTCC, DSWDT or
Timer1: ISOSC;
SOSCSEL = 01
3.3V(4)
Data in the Typical column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
Peripheral IPD deltas are measured with the device in Sleep mode (all peripherals and clocks shut down).
All I/Os are configured as inputs and pulled high. Only the peripheral or clock being measured is enabled.
PMSLP bit is clear and the Peripheral Module Disable bits (PMD) for all unused peripherals are set.
On-chip voltage regulator is disabled (DISVREG is tied to VDD).
On-chip voltage regulator is enabled (DISVREG is tied to VSS). Low-Voltage Detect (LVD) and Brown-out
Detect (BOD) are enabled.
The  current is the additional current consumed when the module is enabled. This current should be
added to the base IPD current.
DS39951C-page 272
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-7:
DC CHARACTERISTICS: POWER-DOWN PERIPHERAL
MODULE CURRENT (IPD) (CONTINUED)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Parameter
No.
Typical(1)
Max
Units
Conditions
 Power-Down Current (IPD): PMD Bits are Set, PMSLP Bit is ‘0’(2)
DC63
1.8
2.3
A
-40°C
DC63a
1.8
2.7
A
+25°C
DC63i
1.8
3.0
A
+60°C
DC63b
1.8
3.0
A
+85°C
+125°C
DC63m
2.2
3.3
A
DC63c
2
2.7
A
-40°C
DC63d
2
2.9
A
+25°C
DC63j
2
3.2
A
+60°C
DC63e
2
3.5
A
+85°C
DC63n
2.5
3.8
A
+125°C
DC63f
2.25
3.0
A
-40°C
DC63g
2.25
3.0
A
+25°C
DC63k
2.25
3.3
A
+60°C
DC63h
2.25
3.5
A
+85°C
DC63p
2.8
4.0
A
+125°C
DC71c
0.001
0.25
A
-40°C
DC71d
0.03
0.25
A
+25°C
DC71j
0.05
0.60
A
+60°C
DC71e
0.08
2.0
A
+85°C
DC71a
3.9
10
A
+125°C
DC71f
0.001
0.50
A
-40°C
DC71g
0.03
0.50
A
+25°C
DC71k
0.05
0.75
A
+60°C
DC71h
0.08
2.5
A
+85°C
3.9
12.5
A
+125°C
DC71b
Note 1:
2:
3:
4:
5:
2.0V(3)
2.5V(3)
32 kHz Crystal with RTCC,
DSWDT or Timer1: ISOSC;
SOSCSEL = 11(5)
3.3V(4)
2.5V(4)
Deep Sleep BOR: IDSBOR
3.3V(4)
Data in the Typical column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
Peripheral IPD deltas are measured with the device in Sleep mode (all peripherals and clocks shut down).
All I/Os are configured as inputs and pulled high. Only the peripheral or clock being measured is enabled.
PMSLP bit is clear and the Peripheral Module Disable bits (PMD) for all unused peripherals are set.
On-chip voltage regulator is disabled (DISVREG is tied to VDD).
On-chip voltage regulator is enabled (DISVREG is tied to VSS). Low-Voltage Detect (LVD) and Brown-out
Detect (BOD) are enabled.
The  current is the additional current consumed when the module is enabled. This current should be
added to the base IPD current.
 2010 Microchip Technology Inc.
DS39951C-page 273
PIC24FJ64GA104 FAMILY
TABLE 28-8:
DC CHARACTERISTICS: I/O PIN INPUT SPECIFICATIONS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise
stated)
Operating temperature
-40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Param
No.
Sym
VIL
Characteristic
Min
Typ(1)
Max
Units
Input Low Voltage(4)
DI10
I/O Pins with ST Buffer
VSS
—
0.2 VDD
V
DI11
I/O Pins with TTL Buffer
VSS
—
0.15 VDD
V
DI15
MCLR
VSS
—
0.2 VDD
V
DI16
OSC1 (XT mode)
VSS
—
0.2 VDD
V
DI17
OSC1 (HS mode)
VSS
—
0.2 VDD
V
DI18
2
I/O Pins with I C™ Buffer:
VSS
—
0.3 VDD
V
DI19
I/O Pins with SMBus Buffer:
VSS
—
0.8
V
I/O Pins with ST Buffer:
with Analog Functions,
Digital Only
0.8 VDD
0.8 VDD
—
—
VDD
5.5
V
V
I/O Pins with TTL Buffer:
with Analog Functions,
Digital Only
0.25 VDD + 0.8
0.25 VDD + 0.8
—
—
VDD
5.5
V
V
VIH
DI20
DI21
Conditions
Input High
SMBus enabled
Voltage(4)
DI25
MCLR
0.8 VDD
—
VDD
V
DI26
OSC1 (XT mode)
0.7 VDD
—
VDD
V
DI27
OSC1 (HS mode)
0.7 VDD
—
VDD
V
0.7 VDD
0.7 VDD
—
—
VDD
5.5
V
V
VDD
5.5
V
V
I2C
DI28
I/O Pins with
Buffer:
with Analog Functions,
Digital Only
DI29
I/O Pins with SMBus Buffer:
with Analog Functions,
Digital Only
DI30
ICNPU CNx Pull-up Current
IIL
2.5V  VPIN  VDD
2.1
2.1
50
250
400
A
VDD = 3.3V, VPIN = VSS
Input Leakage Current(2,3)
DI50
I/O Ports
—
—
+50
nA
VSS  VPIN  VDD,
Pin at high-impedance
DI51
Analog Input Pins
—
—
+50
nA
VSS  VPIN  VDD,
Pin at high-impedance
DI55
MCLR
—
—
+50
nA
VSS VPIN VDD
DI56
OSC1
—
—
+50
nA
VSS VPIN VDD,
XT and HS modes
Note 1:
2:
3:
4:
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified
levels represent normal operating conditions. Higher leakage current may be measured at different input
voltages.
Negative current is defined as current sourced by the pin.
Refer to Table 1-2 for I/O pins buffer types.
DS39951C-page 274
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-9:
DC CHARACTERISTICS: I/O PIN OUTPUT SPECIFICATIONS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Param
No.
Sym
VOL
Characteristic
I/O Ports
DO16
I/O Ports
VOH
Note 1:
Max
Units
—
—
0.4
V
IOL = 8.5 mA, VDD = 3.6V
—
—
0.4
V
IOL = 5.0 mA, VDD = 2.0V
—
—
0.4
V
IOL = 8.0 mA, VDD = 3.6V, 125°C
—
—
0.4
V
IOL = 4.5 mA, VDD = 2.0V, 125°C
3.0
—
—
V
IOH = -3.0 mA, VDD = 3.6V
Conditions
Output High Voltage
I/O Ports
I/O Ports
DO26
Typ(1)
Output Low Voltage
DO10
DO20
Min
2.4
—
—
V
IOH = -6.0 mA, VDD = 3.6V
1.65
—
—
V
IOH = -1.0 mA, VDD = 2.0V
1.4
—
—
V
IOH = -3.0 mA, VDD = 2.0V
3.0
—
—
V
IOH = -2.5 mA, VDD = 3.6V, 125°C
1.65
—
—
V
IOH = -0.5 mA, VDD = 2.0V, 125°C
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
TABLE 28-10: DC CHARACTERISTICS: PROGRAM MEMORY
Standard Operating Conditions: 2.0V to 3.6V (unless
otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
DC CHARACTERISTICS
Param
No.
Sym
Characteristic
D130
EP
Cell Endurance
D131
VPR
VDD for Read
Min
Typ(1)
Max
Units
10,000
—
—
E/W
VMIN
—
3.6
V
Conditions
-40C to +85C
VMIN = Minimum
operating voltage
VPEW Supply Voltage for Self-Timed Writes
D132A
VDDCORE
2.25
—
3.6
V
D132B
VDD
2.35
—
3.6
V
D133A
TIW
Self-Timed Write Cycle Time
—
3
—
ms
D133B
TIE
Self-Timed Page Erase Time
40
—
—
ms
D134
TRETD Characteristic Retention
20
—
—
Year
D135
IDDP
—
7
—
mA
Note 1:
Supply Current during Programming
Provided no other
specifications are violated
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
 2010 Microchip Technology Inc.
DS39951C-page 275
PIC24FJ64GA104 FAMILY
TABLE 28-11: COMPARATOR SPECIFICATIONS
Operating Conditions: 2.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No.
Symbol
Characteristic
Min
Typ
Max
Units
D300
VIOFF
Input Offset Voltage*
—
20
40
mV
D301
VICM
Input Common Mode Voltage*
0
—
VDD
V
D302
CMRR
Common Mode Rejection
Ratio*
55
—
—
dB
300
TRESP
Response Time*(1)
—
150
400
ns
301
TMC2OV
Comparator Mode Change to
Output Valid*
—
—
10
s
*
Note 1:
Comments
Parameters are characterized but not tested.
Response time measured with one comparator input at (VDD – 1.5)/2, while the other input transitions from
VSS to VDD.
TABLE 28-12: COMPARATOR VOLTAGE REFERENCE SPECIFICATIONS
Operating Conditions: 2.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No.
Symbol
Characteristic
Min
Typ
Max
Units
VDD/24
—
VDD/32
LSb
VRD310 CVRES
Resolution
VRD311 CVRAA
Absolute Accuracy
—
—
AVDD – 1.5
LSb
VRD312 CVRUR
Unit Resistor Value (R)
—
2k
—

Time(1)
—
—
10
s
VR310
Note 1:
TSET
Settling
Comments
Settling time measured while CVRR = 1 and CVR<3:0> bits transition from ‘0000’ to ‘1111’.
TABLE 28-13: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS
Operating Conditions: -40°C < TA < +85°C (unless otherwise stated)
Param
Symbol
No.
Characteristics
Min
Typ
Max
Units
VBG
Band Gap Reference Voltage
1.14
1.2
1.26
V
TBG
Band Gap Reference Start-up
Time
—
1
—
ms
VRGOUT
Regulator Output Voltage
2.35
2.5
2.75
V
CEFC
External Filter Capacitor Value
4.7
10
—
F
DS39951C-page 276
Comments
Series resistance < 3 Ohm
recommended;
< 5 Ohm required.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
28.2
AC Characteristics and Timing Parameters
The information contained in this section defines the PIC24FJ64GA104 family AC characteristics and timing parameters.
TABLE 28-14: TEMPERATURE AND VOLTAGE SPECIFICATIONS – AC
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial and
-40°C  TA  +125°C for Extended
Operating voltage VDD range as described in Section 28.1 “DC Characteristics”.
AC CHARACTERISTICS
FIGURE 28-3:
LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS
Load Condition 1 – for all pins except OSCO
Load Condition 2 – for OSCO
VDD/2
CL
Pin
RL
VSS
CL
Pin
RL = 464
CL = 50 pF for all pins except OSCO
15 pF for OSCO output
VSS
TABLE 28-15: CAPACITIVE LOADING REQUIREMENTS ON OUTPUT PINS
Param
Symbol
No.
Characteristic
Min
Typ(1)
Max
Units
Conditions
15
pF
In XT and HS modes when
external clock is used to drive
OSCI.
COSC2
OSCO/CLKO Pin
—
—
DO56
CIO
All I/O Pins and OSCO
—
—
50
pF
EC mode.
DO58
CB
SCLx, SDAx
—
—
400
pF
In I2C™ mode.
DO50
Note 1:
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
 2010 Microchip Technology Inc.
DS39951C-page 277
PIC24FJ64GA104 FAMILY
FIGURE 28-4:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
OSCI
OS20
OS30
OS30
OS31
OS31
OS25
CLKO
OS40
OS41
TABLE 28-16: EXTERNAL CLOCK TIMING REQUIREMENTS
Standard Operating Conditions: 2.50 to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
Sym
No.
OS10
Characteristic
FOSC External CLKI Frequency
(External clocks allowed
only in EC mode)
Oscillator Frequency
Min
Typ(1)
Max
Units
Conditions
DC
4
DC
4
—
—
—
—
32
8
24
6
MHz
MHz
MHz
MHz
EC, -40°C  TA  +85°C
ECPLL, -40°C  TA  +85°C
EC, -40°C  TA  +125°C
ECPLL, -40°C  TA  +125°C
3
3
10
31
3
10
—
—
—
—
—
—
10
8
32
33
6
24
MHz
MHz
MHz
kHz
MHz
MHz
XT
XTPLL, -40°C  TA  +85°C
HS, -40°C  TA  +85°C
SOSC
XTPLL, -40°C  TA  +125°C
HS, -40°C  TA  +125°C
—
—
—
—
62.5
—
DC
ns
OS20
TOSC TOSC = 1/FOSC
OS25
TCY
OS30
TosL, External Clock in (OSCI)
TosH High or Low Time
0.45 x TOSC
—
—
ns
EC
OS31
TosR, External Clock in (OSCI)
TosF Rise or Fall Time
—
—
20
ns
EC
OS40
TckR
—
6
10
ns
—
6
10
ns
OS41
TckF
Note 1:
2:
3:
Instruction Cycle Time(2)
CLKO Rise Time(3)
CLKO Fall
Time(3)
See parameter OS10
for FOSC value
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
Instruction cycle period (TCY) equals two times the input oscillator time base period. All specified values
are based on characterization data for that particular oscillator type under standard operating conditions
with the device executing code. Exceeding these specified limits may result in an unstable oscillator
operation and/or higher than expected current consumption. All devices are tested to operate at “Min.”
values with an external clock applied to the OSCI/CLKI pin. When an external clock input is used, the
“Max.” cycle time limit is “DC” (no clock) for all devices.
Measurements are taken in EC mode. The CLKO signal is measured on the OSCO pin. CLKO is low for
the Q1-Q2 period (1/2 TCY) and high for the Q3-Q4 period (1/2 TCY).
DS39951C-page 278
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-17: PLL CLOCK TIMING SPECIFICATIONS (VDD = 2.0V TO 3.6V)
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
No.
OS50
Sym
FPLLI
Characteristic(1)
PLL Input Frequency
Range
Typ(2)
Max
Units
3
—
8
MHz
3
—
6
MHz
8
8
—
—
32
24
MHz
MHz
OS51
FSYS
OS52
TLOCK PLL Start-up Time
(Lock Time)
—
—
2
ms
OS53
DCLK
-2
1
2
%
Note 1:
2:
PLL Output Frequency
Range
Min
CLKO Stability (Jitter)
Conditions
ECPLL, HSPLL, XTPLL
modes, -40°C  TA  +85°C
ECPLL, HSPLL, XTPLL
modes, -40°C  TA  +125°C
-40°C  TA  +85°C
-40°C  TA  +125°C
Measured over 100 ms period
These parameters are characterized but not tested in manufacturing.
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
TABLE 28-18: INTERNAL RC OSCILLATOR SPECIFICATIONS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
No.
Sym
TFRC
Characteristic(1)
FRC Start-up Time
TLPRC LPRC Start-up Time
Min
Typ
Max
Units
—
15
—
s
—
500
—
s
Conditions
TABLE 28-19: INTERNAL RC OSCILLATOR ACCURACY
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C  TA +85°C for Industrial
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
No.
Characteristic
F20
FRC Accuracy @ 8 MHz(1,3)
F21
kHz(2)
Note 1:
2:
3:
LPRC Accuracy @ 31
Min
Typ
Max
Units
Conditions
-1.25
+0.25
1.0
%
-40°C  TA +85°C, 3.0V  VDD 3.6V
-15
—
15
%
-40°C  TA +85°C, 3.0V  VDD 3.6V
Frequency calibrated at 25°C and 3.3V. OSCTUN bits can be used to compensate for temperature drift.
Change of LPRC frequency as VDD changes.
To achieve this accuracy, physical stress applied to the microcontroller package (ex: by flexing the PCB)
must be kept to a minimum.
 2010 Microchip Technology Inc.
DS39951C-page 279
PIC24FJ64GA104 FAMILY
FIGURE 28-5:
CLKO AND I/O TIMING CHARACTERISTICS
I/O Pin
(Input)
DI35
DI40
I/O Pin
(Output)
New Value
Old Value
DO31
DO32
Note: Refer to Figure 28-3 for load conditions.
TABLE 28-20: CLKO AND I/O TIMING REQUIREMENTS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
No.
Sym
Characteristic
Typ(1)
Min
Max
Units
DO31
TIOR
Port Output Rise Time
—
10
25
ns
DO32
TIOF
Port Output Fall Time
—
10
25
ns
DI35
TINP
INTx pin High or Low
Time (output)
20
—
—
ns
DI40
TRBP
CNx High or Low Time
(input)
2
—
—
TCY
Note 1:
Conditions
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
TABLE 28-21: RESET, POWER-UP TIMER AND BROWN-OUT RESET TIMING REQUIREMENTS
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
Symbol
No.
Characteristic
Min.
Typ(1)
Max. Units
SY10
TmcL
MCLR Pulse Width (low)
2
—
—
s
SY11
TPWRT
Power-up Timer Period
—
64
—
ms
Conditions
SY12
TPOR
Power-on Reset Delay
—
2
—
s
SY13
TIOZ
I/O High-Impedance from MCLR
Low or Watchdog Timer Reset
—
—
100
ns
SY25
TBOR
Brown-out Reset Pulse Width
1
—
—
s
TRST
Internal State Reset Time
—
50
—
s
TDSWU
Wake-up from Deep Sleep Time
—
200
—
s
Based on full discharge of
10 F capacitor on VCAP.
Includes TPOR and TRST.
Sleep wake-up with PMSLP = 0
and WUTSEL<1:0> = 11
TPM
Note 1:
—
10
—
s
—
190
—
s
VDD VBOR
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
DS39951C-page 280
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
TABLE 28-22: ADC MODULE SPECIFICATIONS
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature
-40°C  TA  +85°C for Industrial
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
No.
Symbol
Characteristic
Min.
Typ
Max.
Units
Conditions
Device Supply
AD01
AVDD
Module VDD Supply
Greater of
VDD – 0.3
or 2.0
—
Lesser of
VDD + 0.3
or 3.6
V
AD02
AVSS
Module VSS Supply
VSS – 0.3
—
VSS + 0.3
V
Reference Inputs
AD05
VREFH
Reference Voltage High
AVSS + 1.7
—
AVDD
V
AD06
VREFL
Reference Voltage Low
AVSS
—
AVDD – 1.7
V
AD07
VREF
Absolute Reference
Voltage
AVSS – 0.3
—
AVDD + 0.3
V
AD08
IVREF
Reference Voltage Input
Current
—
—
1.25
mA
(Note 3)
AD09
ZVREF
Reference Input
Impedance
—
10K
—

(Note 4)
(Note 2)
Analog Input
AD10
VINH-VINL Full-Scale Input Span
VREFL
—
VREFH
V
AD11
VIN
Absolute Input Voltage
AVSS – 0.3
—
AVDD + 0.3
V
AD12
VINL
Absolute VINL Input
Voltage
AVSS – 0.3
—
AVDD/2
V
Leakage Current
—
±0.001
±0.610
A
VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V,
Source Impedance = 2.5 k
Recommended Impedance
of Analog Voltage Source
—
—
2.5K

10-bit
AD13
—
AD17
RIN
ADC Accuracy
AD20b NR
Resolution
—
10
—
bits
AD21b INL
Integral Nonlinearity
—
±1
<±2
LSb
VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD22b DNL
Differential Nonlinearity
—
±0.5
<±1.25
LSb
VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD23b GERR
Gain Error
—
±1
±3
LSb
VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD24b EOFF
Offset Error
—
±1
±2
LSb
VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD25b
Monotonicity(1)
—
—
—
—
Note 1:
2:
3:
4:
—
Guaranteed
The ADC conversion result never decreases with an increase in the input voltage and has no missing codes.
Measurements taken with external VREF+ and VREF- are used as the ADC voltage reference.
External reference voltage is applied to the VREF+/- pins. IVREF is current during conversion at 3.3V, 25°C.
Parameter is for design guidance only and is not tested.
Impedance during sampling at 3.3V, 25°C. Parameter is for design guidance only and is not tested.
 2010 Microchip Technology Inc.
DS39951C-page 281
PIC24FJ64GA104 FAMILY
TABLE 28-23: ADC CONVERSION TIMING REQUIREMENTS(1)
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  TA  +85°C
-40°C  TA  +125°C for Extended
AC CHARACTERISTICS
Param
No.
Symbol
Characteristic
Min.
Typ
Max.
Units
Conditions
TCY = 75 ns, AD1CON3
in default state
Clock Parameters
AD50
TAD
ADC Clock Period
75
—
—
ns
AD51
tRC
ADC Internal RC Oscillator
Period
—
250
—
ns
Conversion Rate
AD55
tCONV
Conversion Time
—
12
—
TAD
AD56
FCNV
Throughput Rate
—
—
500
ksps
AD57
tSAMP
Sample Time
—
1
—
TAD
—
3
TAD
AVDD > 2.7V
Clock Parameters
AD61
Note 1:
tPSS
Sample Start Delay from setting
Sample bit (SAMP)
2
Because the sample capacitors will eventually lose charge, clock rates below 10 kHz can affect linearity
performance, especially at elevated temperatures.
DS39951C-page 282
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
29.0
PACKAGING INFORMATION
29.1
Package Marking Information
Example
28-Lead QFN
24FJ32GA
102/ML e3
1010017
XXXXXXXX
XXXXXXXX
YYWWNNN
Example
28-Lead SOIC (.300”)
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
YYWWNNN
Example
28-Lead SPDIP
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
YYWWNNN
28-Lead SSOP
PIC24FJ32GA102
-I/SP e3
1010017
Example
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
Legend: XX...X
Y
YY
WW
NNN
*
Note:
PIC24FJ32GA102/SO e3
1010017
PIC24FJ32GA
102-I/SS e3
1010017
Customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
 2010 Microchip Technology Inc.
DS39951C-page 283
PIC24FJ64GA104 FAMILY
44-Lead QFN
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
44-Lead TQFP
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
DS39951C-page 284
Example
24FJ32GA
104-I/ML e3
1010017
Example
24FJ32GA
104-I/PT e3
1010017
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
29.2
Package Details
The following sections give the technical details of the packages.
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 2010 Microchip Technology Inc.
DS39951C-page 285
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 2010 Microchip Technology Inc.
DS39951C-page 287
PIC24FJ64GA104 FAMILY
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS39951C-page 288
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
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 2010 Microchip Technology Inc.
DS39951C-page 289
PIC24FJ64GA104 FAMILY
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 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
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 2010 Microchip Technology Inc.
DS39951C-page 291
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 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
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 2010 Microchip Technology Inc.
DS39951C-page 293
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 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2010 Microchip Technology Inc.
DS39951C-page 295
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 296
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
APPENDIX A:
REVISION HISTORY
Revision A (August 2009)
Original data sheet for the PIC24FJ64GA104 family of
devices.
Revision B (October 2009)
Corrected Section 10.3 “Input Change Notification”
regarding the number of ICN inputs and the availability
of pull-downs.
Updated Section 10.4.2 “Available Peripherals” by
removing the Timer 1 clock input from Table 10-2.
Updated Section 28.1 “DC Characteristics” as
follows:
• Added new specifications to Tables 29-4 and 29-5
for IDD and IIDLE at 0.5 MIPS operation.
• Updated Table 29-4 with revised maximum IDD
specifications for 1 MIP and 4 MIPS.
• Renumbered the parameters for the delta IPD
current (32 kHz, SOSCEL = 11) from DC62n to
DC63n.
Revision C (August 2010)
This revision includes the following updates:
Pin Diagrams
• Updated Pin 7 and Pin 14 in 28-Pin SPDIP, SOIC.
• Updated the device name, Pin13 and Pin 23, in
28-Pin QFN.
Removed IEC5, IFS5 and IPC21 rows from Table 4-5.
Updated CLKDIV bit details in Table 4-23.
Removed JTAG from Flash programming list in
Section 5.0 “Flash Program Memory”.
Updated Section 10.4.5 “Considerations
Peripheral Pin Selection” as follows:
for
• Replaced the code in Example 10-2.
• Added the new code as Example 10-3.
Updated shaded note in Section 20.0 “32-Bit Programmable Cyclic Redundancy Check (CRC)
Generator” and Section 22.0 “Triple Comparator
Module”.
Updated Section 28.1 “DC Characteristics” as
follows:
• Updated the device name in Table 28-1.
• Added the “125°C data” in
Table 28-4,Table 28-5,Table 28-6 and Table 28-7.
• Updated Min and Typ columns of DC16 in
Table 28-3.
• Added rows, AD08 and AD09, in Table 28-22.
• Added Figure 28-2.
Added the 28-pin SSOP package to Section 29.0
“Packaging Information”.
 2010 Microchip Technology Inc.
DS39951C-page 297
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 298
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
INDEX
A
Partially Multiplexed Addressing Application
Example ........................................................... 199
PIC24F CPU Core ...................................................... 26
PIC24FJ64GA104 Family (General)........................... 12
PMP Module Overview ............................................. 191
PSV Operation............................................................ 50
Reset System ............................................................. 59
RTCC........................................................................ 201
Shared I/O Port Structure ......................................... 121
SPI Master, Frame Master Connection .................... 173
SPI Master, Frame Slave Connection ...................... 173
SPI Master/Slave Connection
(Enhanced Buffer Modes)................................. 172
SPI Master/Slave Connection (Standard Mode)....... 172
SPI Slave, Frame Master Connection ...................... 173
SPI Slave, Frame Slave Connection ........................ 173
SPIx Module (Enhanced Mode)................................ 167
SPIx Module (Standard Mode) ................................. 166
System Clock............................................................ 101
Triple Comparator Module........................................ 229
UART (Simplified)..................................................... 183
Watchdog Timer (WDT)............................................ 248
A/D Converter
Analog Input Model ................................................... 227
Transfer Function...................................................... 228
AC Characteristics
ADC Specifications ................................................... 281
Capacitive Loading Requirements on
Output Pins ....................................................... 277
CLKO and I/O Timing................................................ 280
Conversion Requirements ........................................ 282
External Clock Requirements ................................... 278
Internal RC Oscillator Accuracy ................................ 279
Internal RC Oscillator Specifications......................... 279
Load Conditions and Requirements for
Timing Specifications ....................................... 277
PLL Clock Timing Specifications............................... 279
Reset, Power-up Timer and Brown-out
Reset Timing..................................................... 280
Temperature and Voltage Specifications .................. 277
Alternate Interrupt Vector Table (AIVT) .............................. 65
Assembler
MPASM Assembler................................................... 252
B
Block Diagrams
10-Bit High-Speed A/D Converter............................. 220
16-Bit Asynchronous Timer3 and Timer5 ................. 147
16-Bit Synchronous Timer2 and Timer4 ................... 147
16-Bit Timer1 Module................................................ 143
32-Bit Timer2/3 and Timer4/5 ................................... 146
8-Bit Multiplexed Address and Data
Application Example ......................................... 200
Accessing Program Memory Using
Table Instructions .............................................. 49
Addressable PSP Example....................................... 198
Addressing for Table Registers................................... 51
CALL Stack Frame...................................................... 47
Comparator Voltage Reference ................................ 233
CPU Programmer’s Model .......................................... 27
CRC Module ............................................................. 213
CRC Shift Engine...................................................... 213
CTMU Connections and Internal Configuration
for Capacitance Measurement.......................... 235
CTMU Typical Connections and Internal
Configuration for Pulse Delay Generation ........ 236
CTMU Typical Connections and Internal
Configuration for Time Measurement ............... 236
Data Access From Program Space Address
Generation .......................................................... 48
I2C Module ................................................................ 176
Individual Comparator Configurations....................... 230
Input Capture ............................................................ 151
LCD Control Example, Byte Mode ............................ 200
Legacy PSP Example ............................................... 198
Master Mode, Demultiplexed Addressing ................. 198
Master Mode, Fully Multiplexed Addressing ............. 199
Master Mode, Partially Multiplexed Addressing ........ 199
Multiplexed Addressing Application Example ........... 199
On-Chip Regulator Connections ............................... 246
Output Compare (16-Bit Mode)................................. 156
Parallel EEPROM Example, 16-Bit Data .................. 200
Parallel EEPROM Example, 8-Bit Data .................... 200
 2010 Microchip Technology Inc.
C
C Compilers
MPLAB C18.............................................................. 252
Charge Time Measurement Unit. See CTMU.
Code Examples
Basic Sequence for Clock Switching ........................ 107
Configuring UART1 Input and Output
Functions (PPS), ‘C’ ......................................... 128
Configuring UART1 Input and Output
Functions (PPS), Assembly.............................. 128
Erasing a Program Memory Block, ‘C’........................ 55
Erasing a Program Memory Block, Assembly ............ 54
I/O Port Write/Read .................................................. 122
Initiating a Programming Sequence, ‘C’ ..................... 56
Initiating a Programming Sequence, Assembly.......... 56
Loading the Write Buffers, ‘C’..................................... 56
Loading the Write Buffers, Assembly ......................... 55
PWRSAV Instruction Syntax .................................... 111
Setting the RTCWREN Bit ........................................ 202
Single-Word Flash Programming, ‘C’ ......................... 57
Single-Word Flash Programming, Assembly.............. 57
Code Protection ................................................................ 248
Code Segment.......................................................... 249
Code Segment Protection
Configuration Options....................................... 249
Configuration Register.............................................. 249
General Segment ..................................................... 248
Comparator Voltage Reference ........................................ 233
Configuring ............................................................... 233
Configuration Bits ............................................................. 239
Core Features....................................................................... 9
CPU
Arithmetic Logic Unit (ALU) ........................................ 29
Control Registers........................................................ 28
Core Registers............................................................ 27
Programmer’s Model .................................................. 25
DS39951C-page 299
PIC24FJ64GA104 FAMILY
CRC
Registers ................................................................... 215
Typical Operation ...................................................... 215
User Interface ........................................................... 214
Data .................................................................. 214
Polynomial ........................................................ 214
CTMU
Measuring Capacitance ............................................ 235
Measuring Time ........................................................ 236
Pulse Generation and Delay ..................................... 236
Customer Change Notification Service ............................. 303
Customer Notification Service........................................... 303
Customer Support ............................................................. 303
D
Data Memory
Address Space............................................................ 33
Memory Map ............................................................... 33
Near Data Space ........................................................ 34
SFR Space.................................................................. 34
Software Stack ............................................................ 47
Space Organization and Alignment ............................ 34
DC Characteristics
Comparator Specifications ........................................ 276
Comparator Voltage Reference Specifications ......... 276
I/O Pin Input Specifications ....................................... 274
I/O Pin Output Specifications .................................... 275
Idle Current ............................................................... 269
Internal Voltage Regulator Specifications ................. 276
Operating Current ..................................................... 267
Power-Down Base Current ....................................... 271
Power-Down Peripheral Module Current (IPD) .......... 272
Program Memory ...................................................... 275
Temperature and Voltage Specifications .................. 266
Deep Sleep Watchdog Timer (DSWDT) ........................... 248
Development Support ....................................................... 251
DISVREG Pin.................................................................... 246
E
Electrical Characteristics
Absolute Maximum Ratings ...................................... 263
Thermal Operating Conditions .................................. 265
Thermal Packaging ................................................... 265
V/F Graph (Extended Temperature) ......................... 264
V/F Graph (Industrial) ............................................... 264
Equations
A/D Conversion Clock Period ................................... 227
Baud Rate Reload Calculation .................................. 177
Calculating the PWM Period ..................................... 159
Calculation for Maximum PWM Resolution............... 159
Relationship Between Device and SPI
Clock Speed...................................................... 174
UART Baud Rate with BRGH = 0 ............................. 184
UART Baud Rate with BRGH = 1 ............................. 184
Errata .................................................................................... 8
Examples
Baud Rate Error Calculation (BRGH = 0) ................. 184
DS39951C-page 300
F
Flash Configuration Words ................................. 32, 239–244
Flash Program Memory ...................................................... 51
and Table Instructions ................................................ 51
Enhanced ICSP Operation ......................................... 52
JTAG Operation.......................................................... 52
Programming Algorithm .............................................. 54
RTSP Operation ......................................................... 52
Single-Word Programming ......................................... 57
I
I/O Ports
Analog Input Voltage Considerations ....................... 122
Analog Port Pins Configuration................................. 122
Input Change Notification ......................................... 123
Open-Drain Configuration......................................... 122
Parallel (PIO) ............................................................ 121
Peripheral Pin Select ................................................ 123
Pull-ups and Pull-Downs........................................... 123
I2C
Clock Rates .............................................................. 177
Communicating as Master in a Single
Master Environment ......................................... 175
Reserved Addresses ................................................ 177
Setting Baud Rate When Operating as
Bus Master ....................................................... 177
Slave Address Masking ............................................ 177
Input Capture
32-Bit Mode .............................................................. 152
Operations ................................................................ 152
Synchronous and Trigger Modes.............................. 151
Input Capture with Dedicated Timers ............................... 151
Instruction Based Power-Saving Modes........................... 111
Deep Sleep ....................................................... 112, 119
Idle ............................................................................ 112
Sleep ........................................................................ 111
Instruction Set
Overview................................................................... 257
Summary .................................................................. 255
Symbols Used in Opcode Descriptions .................... 256
Inter-Integrated Circuit. See I2C. ...................................... 175
Internet Address ............................................................... 303
Interrupt Vector Table (IVT) ................................................ 65
Interrupts
Control and Status Registers...................................... 68
Implemented Vectors.................................................. 67
Reset Sequence ......................................................... 65
Setup and Service Procedures ................................... 99
Trap Vectors ............................................................... 66
Vector Table ............................................................... 66
J
JTAG Interface.................................................................. 250
M
Microchip Internet Web Site.............................................. 303
MPLAB ASM30 Assembler, Linker, Librarian ................... 252
MPLAB Integrated Development
Environment Software .............................................. 251
MPLAB PM3 Device Programmer .................................... 254
MPLAB REAL ICE In-Circuit Emulator System ................ 253
MPLINK Object Linker/MPLIB Object Librarian ................ 252
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N
Near Data Space ................................................................ 34
O
Oscillator Configuration
Bit Values for Clock Selection................................... 102
Clock Switching......................................................... 106
Sequence.......................................................... 107
Control Registers ...................................................... 103
CPU Clocking Scheme ............................................. 102
Initial Configuration on POR ..................................... 102
Reference Clock Output............................................ 108
Secondary Oscillator (SOSC) ................................... 108
Output Compare
32-Bit Mode............................................................... 155
Operations ................................................................ 157
Subcycle Resolution ................................................. 160
Synchronous and Trigger Modes.............................. 155
Output Compare with Dedicated Timers ........................... 155
P
Packaging ......................................................................... 283
Details ....................................................................... 285
Marking ..................................................................... 283
Parallel Master Port. See PMP. ........................................ 191
Peripheral Module Disable Bits ......................................... 119
Peripheral Pin Select (PPS) .............................................. 123
Available Peripherals and Pins ................................. 123
Configuration Control Changes................................. 126
Considerations for Use ............................................. 127
Function Priority ........................................................ 123
Input Mapping ........................................................... 124
Output Mapping ........................................................ 125
Pinout Descriptions ............................................................. 13
Power-Saving Features .................................................... 111
Clock Frequency and Clock Switching...................... 111
Product Identification System ........................................... 305
Program Memory
Access Using Table Instructions................................. 49
Address Space............................................................ 31
Addressing Space....................................................... 47
Flash Configuration Words ......................................... 32
Memory Maps ............................................................. 31
Organization................................................................ 32
Program Space Visibility ............................................. 50
Program Space Visibility (PSV) .......................................... 50
Program Verification ......................................................... 248
Pulse-Width Modulation (PWM) Mode .............................. 158
Pulse-Width Modulation. See PWM.
PWM
Duty Cycle and Period .............................................. 159
R
Reader Response ............................................................. 304
Register Maps
A/D Converter ............................................................. 43
Comparators ............................................................... 45
CPU Core.................................................................... 35
CRC ............................................................................ 44
CTMU.......................................................................... 43
Deep Sleep ................................................................. 46
I2C............................................................................... 41
ICN.............................................................................. 36
Input Capture .............................................................. 39
Interrupt Controller ...................................................... 37
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NVM............................................................................ 46
Output Compare ......................................................... 40
Pad Configuration....................................................... 43
Parallel Master/Slave Port .......................................... 44
Peripheral Pin Select .................................................. 45
PMD............................................................................ 46
PORTA ....................................................................... 42
PORTB ....................................................................... 42
PORTC ....................................................................... 42
RTCC.......................................................................... 44
SPI.............................................................................. 42
System........................................................................ 46
Timers......................................................................... 38
UART.......................................................................... 41
Registers
AD1CHS (A/D Input Select)...................................... 224
AD1CON1 (A/D Control 1)........................................ 221
AD1CON2 (A/D Control 2)........................................ 222
AD1CON3 (A/D Control 3)........................................ 223
AD1CSSL (A/D Input Scan Select)........................... 226
AD1PCFG (A/D Port Configuration) ......................... 225
ALCFGRPT (Alarm Configuration) ........................... 205
ALMINSEC (Alarm Minutes and
Seconds Value) ................................................ 209
ALMTHDY (Alarm Month and Day Value) ................ 208
ALWDHR (Alarm Weekday and Hours Value) ......... 208
CLKDIV (Clock Divider) ............................................ 105
CMSTAT (Comparator Module Status) .................... 232
CMxCON (Comparator x Control) ............................ 231
CORCON (CPU Control) ............................................ 29
CORCON (CPU Core Control) ................................... 69
CRCCON1 (CRC Control 1) ..................................... 216
CRCCON2 (CRC Control 2) ..................................... 217
CRCXORH (CRC XOR Polynomial, High Byte) ....... 218
CRCXORL (CRC XOR Polynomial, Low Byte)......... 217
CTMUCON (CTMU Control)..................................... 237
CTMUICON (CTMU Current Control) ....................... 238
CVRCON (Comparator Voltage
Reference Control) ........................................... 234
CW1 (Flash Configuration Word 1) .......................... 240
CW2 (Flash Configuration Word 2) .......................... 242
CW3 (Flash Configuration Word 3) .......................... 243
DEVID (Device ID).................................................... 245
DEVREV (Device Revision)...................................... 245
DSCON (Deep Sleep Control).................................. 117
DSWAKE (Deep Sleep Wake-up Source) ................ 118
I2CxCON (I2Cx Control)........................................... 178
I2CxMSK (I2Cx Slave Mode Address Mask)............ 182
I2CxSTAT (I2Cx Status) ........................................... 180
ICxCON1 (Input Capture x Control 1)....................... 153
ICxCON2 (Input Capture x Control 2)....................... 154
IEC0 (Interrupt Enable Control 0) ............................... 77
IEC1 (Interrupt Enable Control 1) ............................... 78
IEC2 (Interrupt Enable Control 2) ............................... 79
IEC3 (Interrupt Enable Control 3) ............................... 80
IEC4 (Interrupt Enable Control 4) ............................... 81
IFS0 (Interrupt Flag Status 0) ..................................... 72
IFS1 (Interrupt Flag Status 1) ..................................... 73
IFS2 (Interrupt Flag Status 2) ..................................... 74
IFS3 (Interrupt Flag Status 3) ..................................... 75
IFS4 (Interrupt Flag Status 4) ..................................... 76
INTCON1 (Interrupt Control 1) ................................... 70
INTCON2 (Interrupt Control 2) ................................... 71
INTTREG (Interrupt Control and Status) .................... 98
IPC0 (Interrupt Priority Control 0) ............................... 82
DS39951C-page 301
PIC24FJ64GA104 FAMILY
IPC1 (Interrupt Priority Control 1) ............................... 83
IPC10 (Interrupt Priority Control 10) ........................... 92
IPC11 (Interrupt Priority Control 11) ........................... 93
IPC12 (Interrupt Priority Control 12) ........................... 94
IPC15 (Interrupt Priority Control 15) ........................... 95
IPC16 (Interrupt Priority Control 16) ........................... 96
IPC18 (Interrupt Priority Control 18) ........................... 97
IPC19 (Interrupt Priority Control 19) ........................... 97
IPC2 (Interrupt Priority Control 2) ............................... 84
IPC3 (Interrupt Priority Control 3) ............................... 85
IPC4 (Interrupt Priority Control 4) ............................... 86
IPC5 (Interrupt Priority Control 5) ............................... 87
IPC6 (Interrupt Priority Control 6) ............................... 88
IPC7 (Interrupt Priority Control 7) ............................... 89
IPC8 (Interrupt Priority Control 8) ............................... 90
IPC9 (Interrupt Priority Control 9) ............................... 91
MINSEC (RTCC Minutes and Seconds Value) ......... 207
MTHDY (RTCC Month and Day Value) .................... 206
NVMCON (Flash Memory Control) ............................. 53
OCxCON1 (Output Compare x Control 1) ................ 161
OCxCON2 (Output Compare x Control 2) ................ 163
OSCCON (Oscillator Control) ................................... 103
OSCTUN (FRC Oscillator Tune) ............................... 106
PADCFG1 (Pad Configuration Control) ............ 197, 204
PMADDR (Parallel Port Address) ............................. 195
PMAEN (Parallel Port Enable) .................................. 195
PMCON (Parallel Port Control) ................................. 192
PMMODE (Parallel Port Mode) ................................. 194
PMSTAT (Parallel Port Status) ................................. 196
RCFGCAL (RTCC Calibration and
Configuration) ................................................... 203
RCON (Reset Control) ................................................ 60
REFOCON (Reference Oscillator Control)................ 109
RPINR0 (Peripheral Pin Select Input 0) .................... 129
RPINR1 (Peripheral Pin Select Input 1) .................... 129
RPINR11 (Peripheral Pin Select Input 11) ................ 132
RPINR18 (Peripheral Pin Select Input 18) ................ 133
RPINR19 (Peripheral Pin Select Input 19) ................ 133
RPINR20 (Peripheral Pin Select Input 20) ................ 134
RPINR21 (Peripheral Pin Select Input 21) ................ 134
RPINR22 (Peripheral Pin Select Input 22) ................ 135
RPINR23 (Peripheral Pin Select Input 23) ................ 135
RPINR3 (Peripheral Pin Select Input 3) .................... 130
RPINR4 (Peripheral Pin Select Input 4) .................... 130
RPINR7 (Peripheral Pin Select Input 7) .................... 131
RPINR8 (Peripheral Pin Select Input 8) .................... 131
RPINR9 (Peripheral Pin Select Input 9) .................... 132
RPOR0 (Peripheral Pin Select Output 0) .................. 136
RPOR1 (Peripheral Pin Select Output 1) .................. 136
RPOR10 (Peripheral Pin Select Output 10) .............. 141
RPOR11 (Peripheral Pin Select Output 11) .............. 141
RPOR12 (Peripheral Pin Select Output 12) .............. 142
RPOR2 (Peripheral Pin Select Output 2) .................. 137
RPOR3 (Peripheral Pin Select Output 3) .................. 137
RPOR4 (Peripheral Pin Select Output 4) .................. 138
RPOR5 (Peripheral Pin Select Output 5) .................. 138
RPOR6 (Peripheral Pin Select Output 6) .................. 139
RPOR7 (Peripheral Pin Select Output 7) .................. 139
RPOR8 (Peripheral Pin Select Output 8) .................. 140
RPOR9 (Peripheral Pin Select Output 9) .................. 140
SPIxCON1 (SPIx Control 1) ...................................... 170
SPIxCON2 (SPIx Control 2) ...................................... 171
SPIxSTAT (SPIx Status and Control) ....................... 168
SR (ALU STATUS) ............................................... 28, 69
T1CON (Timer1 Control)........................................... 144
DS39951C-page 302
TxCON (Timer2 and Timer4 Control) ....................... 148
TyCON (Timer3 and Timer5 Control) ....................... 149
UxMODE (UARTx Mode).......................................... 186
UxSTA (UARTx Status and Control)......................... 188
WKDYHR (RTCC Weekday and Hours Value)......... 207
YEAR (RTCC Year Value)........................................ 206
Resets
BOR (Brown-out Reset).............................................. 59
Clock Source Selection............................................... 61
CM (Configuration Mismatch Reset)........................... 59
Deep Sleep BOR (DSBOR) ........................................ 63
Delay Times................................................................ 62
Device Times .............................................................. 61
IOPUWR (Illegal Opcode Reset) ................................ 59
MCLR (Pin Reset)....................................................... 59
POR (Power-on Reset)............................................... 59
RCON Flags Operation............................................... 61
SFR States ................................................................. 63
SWR (RESET Instruction) .......................................... 59
TRAPR (Trap Conflict Reset) ..................................... 59
UWR (Uninitialized W Register Reset) ....................... 59
WDT (Watchdog Timer Reset) ................................... 59
Revision History................................................................ 297
RTCC
Alarm Configuration .................................................. 210
Alarm Mask Settings (figure) .................................... 211
Calibration ................................................................ 210
Clock Source Selection............................................. 202
Register Mapping...................................................... 202
Source Clock ............................................................ 201
Write Lock................................................................. 202
S
Selective Peripheral Control ............................................. 119
Serial Peripheral Interface. See SPI.
SFR Space ......................................................................... 34
Software Simulator (MPLAB SIM) .................................... 253
Software Stack.................................................................... 47
Special Features................................................................. 10
SPI
T
Timer1............................................................................... 143
Timer2/3 and Timer4/5 ..................................................... 145
Timing Diagrams
CLKO and I/O Characteristics .................................. 280
External Clock........................................................... 278
Triple Comparator............................................................. 229
U
UART ................................................................................ 183
Baud Rate Generator (BRG) .................................... 184
IrDA Support ............................................................. 185
Operation of UxCTS and UxRTS Pins...................... 185
Receiving
8-Bit or 9-Bit Data Mode ................................... 185
Transmitting
8-Bit Data Mode................................................ 185
9-Bit Data Mode................................................ 185
Break and Sync Sequence ............................... 185
Universal Asynchronous Receiver Transmitter. See UART.
 2010 Microchip Technology Inc.
PIC24FJ64GA104 FAMILY
V
W
VDDCORE/VCAP Pin............................................................ 246
Voltage Regulator (On-Chip) ............................................ 246
and BOR ................................................................... 247
and POR ................................................................... 246
Power-up Requirements ........................................... 247
Standby Mode........................................................... 247
Tracking Mode .......................................................... 246
Watchdog Timer (WDT).................................................... 247
Control Register........................................................ 248
Windowed Operation ................................................ 248
WWW Address ................................................................. 303
WWW, On-Line Support ....................................................... 8
 2010 Microchip Technology Inc.
DS39951C-page 303
PIC24FJ64GA104 FAMILY
NOTES:
DS39951C-page 304
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THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
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Users of Microchip products can receive assistance
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To register, access the Microchip web site at
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DS39951C-page 305
PIC24FJ64GA104 FAMILY
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation
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Literature Number: DS39951C
Questions:
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DS39951C-page 306
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PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PIC 24 FJ 64 GA1 04 T - I / PT - XXX
Examples:
a)
Microchip Trademark
Architecture
Flash Memory Family
b)
Program Memory Size (KB)
PIC24FJ64GA104-I/PT:
PIC24F device with, 64-Kbyte program
memory, 44-pin, Industrial temp.,
TQFP package.
PIC24FJ32GA102-I/ML:
PIC24F device with32-Kbyte program memory,
28-pin, Industrial temp.,QFN package.
Product Group
Pin Count
Tape and Reel Flag (if applicable)
Temperature Range
Package
Pattern
Architecture
24
= 16-bit modified Harvard without DSP
Flash Memory Family
FJ
= Flash program memory
Product Group
GA1 = General purpose microcontrollers
Pin Count
02
04
= 28-pin
= 44-pin
Temperature Range
I
E
= -40C to +85C (Industrial)
= -40C to +125C (Extended)
Package
ML = 28-lead (6x6 mm) or 44-lead (8x8 mm) QFN
(Quad Flat)
PT = 44-lead (10x10x1 mm) TQFP (Thin Quad Flatpack)
SO = 28-lead (7.50 mm wide) SOIC (Small Outline)
SP = 28-lead (300 mil) SPDIP (Skinny Plastic Dual In-Line)
SS = 28-lead (530 mm) SSOP (Plastic Shrink Small)
Pattern
Three-digit QTP, SQTP, Code or Special Requirements
(blank otherwise)
ES = Engineering Sample
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DS39951C-page 307
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07/15/10
DS39951C-page 308
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