MICROCHIP PIC24FJ64GA010

PIC24FJ128GA Family
Data Sheet
General Purpose,
16-Bit Flash Microcontrollers
© 2006 Microchip Technology Inc.
Preliminary
DS39747C
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
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OTHERWISE, RELATED TO THE INFORMATION,
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Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart, rfPIC and SmartShunt are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,
SEEVAL, SmartSensor 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, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Linear Active Thermistor, Mindi,
MiWi, MPASM, MPLIB, MPLINK, PICkit, PICDEM,
PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo,
PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select
Mode, Smart Serial, SmartTel, Total Endurance, UNI/O,
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.
© 2006, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona, Gresham, Oregon and Mountain View, California. The
Company’s quality system processes and procedures are for its
PICmicro® 8-bit MCUs, 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.
DS39747C-page ii
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
General Purpose, 16-bit Flash Microcontrollers
High-Performance CPU:
Analog Features:
• Modified Harvard Architecture
• Up to 16 MIPS operation @ 32 MHz
• 8 MHz internal oscillator:
- 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
• 10-bit, up to 16-channel Analog-to-Digital Converter
(A/D):
- 500 ksps conversion rate
- Conversion available during Sleep and Idle
• Dual Analog Comparators with Programmable
Input/Output Configuration
Peripheral Features:
• Two 3-wire/4-wire SPI modules, supporting 4 Frame
modes with 4-level FIFO Buffer
• Two I2C™ modules support Multi-Master/Slave
mode and 7-bit/10-bit Addressing
• Two UART modules:
- Supports RS-232, RS-485 and LIN 1.2
- Supports IrDA® with on-chip hardware endec
- Auto-Wake-up on Start bit
- Auto-Baud Detect
- 4-level FIFO buffer
• Parallel Master Slave Port (PMP/PSP):
- Supports 8-bit or 16-bit data
- Supports 16 address lines
• Hardware Real-Time Clock/Calendar (RTCC):
- Provides clock, calendar and alarm functions
• Five 16-bit Timers/Counters with Programmable
prescaler
• Five 16-bit Capture Inputs
• Five 16-bit Compare/PWM Outputs
• High-Current Sink/Source on select I/O pins:
18 mA/18 mA
• Configurable Open-Drain Output on Digital I/O pins
• Up to 5 External Interrupt Sources
Special Microcontroller Features:
UART
SPI
I2C™
10-bit
A/D (ch)
Comparators
PMP/PSP
JTAG
5
2
2
2
16
2
Y
Y
2
2
2
16
2
Y
Y
5
2
2
2
16
2
Y
Y
5
5
2
2
2
16
2
Y
Y
5
5
2
2
2
16
2
Y
Y
5
5
5
2
2
2
16
2
Y
Y
8K
5
5
5
2
2
2
16
2
Y
Y
8K
5
5
5
2
2
2
16
2
Y
Y
8K
5
5
5
2
2
2
16
2
Y
Y
Pins
Program
Memory
(Bytes)
SRAM
(Bytes)
Timers
16-bit
Capture
Input
Compare/
PWM Output
• Operating Voltage Range of 2.0V to 3.6V
• Flash Program Memory:
- 1000 erase/write cycles, typical
- Flash retention 20 years, typical
• Self-Reprogrammable under Software Control
• Selectable Power Management modes:
- Sleep, Idle and Alternate Clock modes
• Fail-Safe Clock Monitor operation:
- Detects clock failure and switches to on-chip,
low-power RC oscillator
• On-Chip LDO Regulator
• JTAG Boundary Scan and Programming Support
• Power-on Reset (POR), Power-up Timer (PWRT)
and Oscillator Start-up Timer (OST)
• Flexible Watchdog Timer (WDT) with On-Chip,
Low-Power RC Oscillator for reliable operation
• In-Circuit Serial Programming™ (ICSP™) and
In-Circuit Emulation (ICE) via 2 pins
PIC24FJ64GA006
64
64K
8K
5
5
PIC24FJ96GA006
64
96K
8K
5
5
5
PIC24FJ128GA006
64
128K
8K
5
5
PIC24FJ64GA008
80
64K
8K
5
PIC24FJ96GA008
80
96K
8K
5
PIC24FJ128GA008
80
128K
8K
PIC24FJ64GA010
100
64K
PIC24FJ96GA010
100
96K
PIC24FJ128GA010
100
128K
Device
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 1
PIC24FJ128GA FAMILY
Pin Diagrams
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
PMD4/RE4
PMD3/RE3
PMD2/RE2
PMD1/RE1
PMD0/RE0
RF1
RF0
ENVREG
VCAP/VDDCORE
CN16/RD7
CN15/RD6
PMRD/CN14/RD5
PMWR/OC5/IC5/CN13/RD4
PMBE/OC4/RD3
OC3/RD2
OC2/RD1
64-Pin TQFP
PMD5/RE5
PMD6/RE6
PMD7/RE7
PMA5/SCK2/CN8/RG6
PMA4/SDI2/CN9/RG7
PMA3/SDO2/CN10/RG8
MCLR
PMA2/SS2/CN11/RG9
VSS
VDD
C1IN+/AN5/CN7/RB5
C1IN-/AN4/CN6/RB4
C2IN+/AN3/CN5/RB3
C2IN-/AN2/SS1/CN4/RB2
PGC1/EMUC1/VREF-/AN1/CN3/RB1
2
3
4
5
6
7
8
9
10
11
12
48
SOSCO/T1CK/CN0/RC14
47
SOSCI/CN1/RC13
46
OC1/RD0
IC4/PMCS1/INT4/RD11
IC3/PMCS2/INT3/RD10
IC2/U1CTS//INT2/RD9
45
44
43
42
PIC24FJXXGA006
PIC24FJXXXGA006
41
40
39
38
37
36
35
13
14
15
16
34
33
IC1/RTCC/INT1/RD8
Vss
OSC2/CLKO/RC15
OSC1/CLKI/RC12
VDD
SCL1/RG2
SDA1/RG3
U1RTS/BCLK1/SCK1/INT0/RF6
U1RX/SDI1/RF2
U1TX/SDO1/RF3
PGC2/EMUC2/AN6/OCFA/RB6
PGD2/EMUD2/AN7/RB7
AVDD
AVSS
U2CTS/C1OUT/AN8/RB8
PMA7/C2OUT/AN9/RB9
TMS/PMA13/CVREF/AN10/RB10
TDO/PMA12/AN11/RB11
VSS
VDD
TCK/PMA11/AN12/RB12
TDI/PMA10/AN13/RB13
PMA1/U2RTS/BCLK2/AN14/RB14
PMA0/AN15/OCFB/CN12/RB15
PMA9/U2RX/SDA2/CN17/RF4
PMA8/U2TX/SCL2/CN18/RF5
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
PGD1/EMUD1/PMA6/VREF+/AN0/CN2/RB0
1
DS39747C-page 2
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
Pin Diagrams (Continued)
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
PMD4/RE4
PMD3/RE3
PMD2/RE2
PMD1/RE1
PMD0/RE0
RG0
RG1
RF1
RF0
ENVREG
VCAP/VDDCORE
CN16/RD7
CN15/RD6
PMRD/CN14/RD5
PMWR/OC5/CN13/RD4
CN19/RD13
IC5/RD12
PMBE/OC4/RD3
OC3/RD2
OC2/RD1
80-Pin TQFP
PMD5/RE5
PMD6/RE6
PMD7/RE7
T2CK/RC1
T4CK/RC3
PMA5/SCK2/CN8/RG6
PMA4/SDI2/CN9/RG7
PMA3/SDO2/CN10/RG8
MCLR
PMA2/SS2/CN11/RG9
VSS
VDD
TMS/INT1/RE8
TDO/INT2/RE9
2
3
4
5
6
7
8
9
10
11
12
PIC24FJXXGA008
PIC24FJXXXGA008
13
14
15
16
17
18
19
20
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
SOSCO/T1CK/CN0/RC14
SOSCI/CN1/RC13
OC1/RD0
IC4/PMCS1/RD11
IC3/PMCS2/RD10
IC2/RD9
IC1/RTCC/RD8
SDA2/INT4/RA15
SCL2/INT3/RA14
VSS
OSC2/CLKO/RC15
OSC1/CLKI/RC12
VDD
SCL1/RG2
SDA1/RG3
SCK1/INT0/RF6
SDI1/RF7
SDO1/RF8
U1RX/RF2
U1TX/RF3
PGC2/EMUC2/AN6/OCFA/RB6
PGD2/EMUD2/AN7/RB7
PMA7/VREF-/RA9
PMA6/VREF+/RA10
AVDD
AVSS
U2CTS/C1OUT/AN8/RB8
C2OUT/AN9/RB9
PMA13/CVREF/AN10/RB10
PMA12/AN11/RB11
VSS
VDD
TCK/PMA11/AN12/RB12
TDI/PMA10/AN13/RB13
PMA1/U2RTS/BCLK2/AN14/RB14
PMA0/AN15/OCFB/CN12/RB15
CN20/U1CTS/RD14
CN21/U1RTS/BCLK1/RD15
PMA9/U2RX/CN17/RF4
PMA8/U2TX/CN18/RF5
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
C1IN+/AN5/CN7/RB5
C1IN-/AN4/CN6/RB4
C2IN+/AN3/CN5/RB3
C2IN-/AN2/SS1/CN4/RB2
PGC1/EMUC1/AN1/CN3/RB1
PGD1/EMUD1/AN0/CN2/RB0
1
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 3
PIC24FJ128GA FAMILY
Pin Diagrams (Continued))
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
PMD4/RE4
PMD3/RE3
PMD2/RE2
RG13
RG12
RG14
PMD1/RE1
PMD0/RE0
RA7
RA6
RG0
RG1
RF1
RF0
ENVREG
VCAP/VDDCORE
CN16/RD7
CN15/RD6
PMRD/CN14/RD5
PMWR/OC5/CN13/RD4
CN19/RD13
IC5/RD12
PMBE/OC4/RD3
OC3/RD2
OC2/RD1
100-Pin TQFP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
PIC24FJXXGA010
PIC24FJXXXGA010
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
VSS
SOSCO/T1CK/CN0/RC14
SOSCI/CN1/RC13
OC1/RD0
IC4/PMCS1/RD11
IC3/PMCS2/RD10
IC2/RD9
IC1/RTCC/RD8
INT4/RA15
INT3/RA14
VSS
OSC2/CLKO/RC15
OSC1/CLKI/RC12
VDD
TDO/RA5
TDI/RA4
SDA2/RA3
SCL2/RA2
SCL1/RG2
SDA1/RG3
SCK1/INT0/RF6
SDI1/RF7
SDO1/RF8
U1RX/RF2
U1TX/RF3
PGC2/EMUC2/AN6/OCFA/RB6
PGD2/EMUD2/AN7/RB7
PMA7/VREF-/RA9
PMA6/VREF+/RA10
AVDD
AVSS
C1OUT/AN8/RB8
C2OUT/AN9/RB9
PMA13/CVREF/AN10/RB10
PMA12/AN11/RB11
VSS
VDD
TCK/RA1
U2RTS/BCLK2/RF13
U2CTS/RF12
PMA11/AN12/RB12
PMA10/AN13/RB13
PMA1/AN14/RB14
PMA0/AN15/OCFB/CN12/RB15
VSS
VDD
CN20/U1CTS/RD14
CN21/U1RTS/BCLK1/RD15
PMA9/U2RX/CN17/RF4
PMA8/U2TX/CN18/RF5
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
RG15
VDD
PMD5/RE5
PMD6/RE6
PMD7/RE7
T2CK/RC1
T3CK/RC2
T4CK/RC3
T5CK/RC4
PMA5/SCK2/CN8/RG6
PMA4/SDI2/CN9/RG7
PMA3/SDO2/CN10/RG8
MCLR
PMA2/SS2/CN11/RG9
VSS
VDD
TMS/RA0
INT1/RE8
INT2/RE9
C1IN+/AN5/CN7/RB5
C1IN-/AN4/CN6/RB4
C2IN+/AN3/CN5/RB3
C2IN-/AN2/SS1/CN4/RB2
PGC1/EMUC1/AN1/CN3/RB1
PGD1/EMUD1/AN0/CN2/RB0
DS39747C-page 4
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
Table of Contents
1.0 Device Overview .......................................................................................................................................................................... 7
2.0 CPU............................................................................................................................................................................................ 19
3.0 Memory Organization ................................................................................................................................................................. 25
4.0 Flash Program Memory.............................................................................................................................................................. 45
5.0 Resets ........................................................................................................................................................................................ 51
6.0 Interrupt Controller ..................................................................................................................................................................... 57
7.0 Oscillator Configuration .............................................................................................................................................................. 91
8.0 Power-Saving Features.............................................................................................................................................................. 97
9.0 I/O Ports ..................................................................................................................................................................................... 99
10.0 Timer1 ...................................................................................................................................................................................... 101
11.0 Timer2/3 and Timer4/5 ............................................................................................................................................................ 103
12.0 Input Capture............................................................................................................................................................................ 109
13.0 Output Compare....................................................................................................................................................................... 111
14.0 Serial Peripheral Interface (SPI)............................................................................................................................................... 115
15.0 Inter-Integrated Circuit (I2C™) ................................................................................................................................................. 123
16.0 Universal Asynchronous Receiver Transmitter (UART) ........................................................................................................... 131
17.0 Parallel Master Port.................................................................................................................................................................. 139
18.0 Real-Time Clock and Calendar ................................................................................................................................................ 149
19.0 Programmable Cyclic Redundancy Check (CRC) Generator .................................................................................................. 161
20.0 10-bit High-Speed A/D Converter............................................................................................................................................. 165
21.0 Comparator Module.................................................................................................................................................................. 173
22.0 Comparator Voltage Reference................................................................................................................................................ 177
23.0 Special Features ...................................................................................................................................................................... 179
24.0 Instruction Set Summary .......................................................................................................................................................... 189
25.0 Development Support............................................................................................................................................................... 197
26.0 Electrical Characteristics .......................................................................................................................................................... 201
27.0 Packaging Information.............................................................................................................................................................. 213
Appendix A: Revision History............................................................................................................................................................. 219
Index ................................................................................................................................................................................................. 221
The Microchip Web Site ..................................................................................................................................................................... 225
Customer Change Notification Service .............................................................................................................................................. 225
Customer Support .............................................................................................................................................................................. 225
Reader Response .............................................................................................................................................................................. 226
Product Identification System ............................................................................................................................................................ 227
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 5
PIC24FJ128GA FAMILY
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
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welcome your feedback.
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The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
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To determine if an errata sheet exists for a particular device, please check with one of the following:
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DS39747C-page 6
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
1.0
DEVICE OVERVIEW
1.1.2
This document contains device specific information for
the following devices:
•
•
•
•
•
•
•
•
•
PIC24FJ64GA006
PIC24FJ64GA008
PIC24FJ64GA010
PIC24FJ96GA006
PIC24FJ96GA008
PIC24FJ96GA010
PIC24FJ128GA006
PIC24FJ128GA008
PIC24FJ128GA010
POWER-SAVING TECHNOLOGY
All of the devices in the PIC24FJ128GA family incorporate a range of features that can significantly reduce
power consumption during operation. Key items
include:
This family introduces a new line of Microchip devices:
a 16-bit RISC microcontroller family with a broad
peripheral feature set and enhanced computational
performance. The PIC24FJ128GA family offers a new
migration option for those high-performance applications which may be outgrowing their 8-bit platforms, but
don’t require the numerical processing power of a
digital signal processor.
• On-the-Fly Clock Switching: The device clock
can be changed under software control to the
Timer1 source or the internal low-power 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.
• Instruction-Based Power-Saving Modes: The
microcontroller can suspend all operations, or
selectively shut down its core while leaving its
peripherals active, with a single instruction in
software.
1.1
1.1.3
1.1.1
Core Features
16-BIT ARCHITECTURE
Central to all PIC24 devices is the 16-bit modified
Harvard architecture, first introduced with Microchip’s
dsPIC® digital signal controllers. The PIC24 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 8 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
OSCILLATOR OPTIONS AND
FEATURES
All of the devices in the PIC24FJ128GA 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 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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 7
PIC24FJ128GA FAMILY
1.1.4
1.3
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 to the next larger
device. This is true when moving between devices with
the same pin count, or even jumping from 64-pin to
80-pin to 100-pin devices.
Details on Individual Family
Members
Devices in the PIC24FJ128GA family are available in
64-pin, 80-pin and 100-pin packages. The general
block diagram for all devices is shown in Figure 1-1.
The devices are differentiated from each other in two
ways:
1.
Flash program memory (64 Kbytes for
PIC24FJ64GA devices, 96 Kbytes for
PIC24FJ96GA devices and 128 Kbytes for
PIC24FJ128GA devices).
Available I/O pins and ports (53 pins on 6 ports
for 64-pin devices, 69 pins on 7 ports for 80-pin
devices and 84 pins on 7 ports for 100-pin
devices).
The PIC24 family is pin-compatible with devices in the
dsPIC33 family, and shares some compatibility with the
pinout schema for PIC18 and dsPIC30. This extends
the ability of applications to grow from the relatively
simple to the powerful and complex, yet still select a
Microchip device.
2.
1.2
All other features for devices in this family are identical.
These are summarized in Table 1-1.
Other Special Features
• Communications: The PIC24FJ128GA family
incorporates a range of serial communication
peripherals to handle a range of application
requirements. All devices are equipped with two
independent UARTs with built-in IrDA
encoder/decoders. There are also two independent SPI modules, and two independent I2C
modules that support both Master and Slave
modes of operation.
• 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
16 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 use of
the core application.
• 10-Bit A/D Converter: This 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.
DS39747C-page 8
A list of the pin features available on the
PIC24FJ128GA 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
the data sheet. Multiplexed features are sorted by the
priority given to a feature, with the highest priority
peripheral being listed first.
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
Operating Frequency
Program Memory (Bytes)
Program Memory (Instructions)
PIC24FJ128GA010
PIC24FJ96GA010
64K
96K
128K
64K
96K
128K
64K
96K
128K
22,016
32,768
44,032
22,016
32,768
44,032
22,016
32,768
44,032
8192
Interrupt Sources
(Soft Vectors/NMI Traps)
43
(39/4)
Total I/O Pins
PIC24FJ64GA010
DC – 32 MHz
Data Memory (Bytes)
I/O Ports
PIC24FJ128GA008
PIC24FJ96GA008
PIC24FJ64GA008
PIC24FJ96GA006
Features
PIC24FJ128GA006
DEVICE FEATURES FOR THE PIC24FJ128GA FAMILY
PIC24FJ64GA006
TABLE 1-1:
Ports B, C, D, E, F, G
Ports A, B, C, D, E, F, G
Ports A, B, C, D, E, F, G
53
69
84
Timers:
Total number (16-bit)
5
32-bit (from paired 16-bit timers)
2
Input Capture Channels
5
Output Compare/PWM Channels
5
Input Change Notification
Interrupt
19
22
Serial Communications:
Enhanced UART
2
SPI (3-wire/4-wire)
2
I2C™
2
Parallel Communications
(PMP/PSP)
Yes
JTAG Boundary Scan
Yes
10-bit Analog-to-Digital Module
(input channels)
16
Analog Comparators
2
Resets (and Delays)
POR, BOR, RESET Instruction, MCLR, WDT; Illegal Opcode,
Repeat Hardware Traps, (PWRT, OST, PLL Lock)
Instruction Set
Packages
© 2006 Microchip Technology Inc.
76 Base Instructions, Multiple Addressing Mode Variations
64-pin TQFP
Preliminary
80-pin TQFP
100-pin TQFP
DS39747C-page 9
PIC24FJ128GA FAMILY
FIGURE 1-1:
PIC24FJ128GA FAMILY GENERAL BLOCK DIAGRAM
Data Bus
Interrupt
Controller
PORTA(1)
RA0:RA7,
RA9:RA10,
RA14:15
16
16
8
16
Data Latch
PSV & Table
Data Access
Control Block
Data RAM
PCU PCH PCL
Program Counter
Repeat
Stack
Control
Control
Logic
Logic
23
PORTB
Address
Latch
RB0:RB15
16
23
16
Read AGU
Write AGU
Address Latch
16
PORTC(1)
RC1:RC4,
RC12:RC15
Program Memory
Data Latch
EA MUX
24
Inst Latch
Literal Data
Address Bus
16
PORTD(1)
16
RD0:RD15
Inst Register
Instruction
Decode &
Control
RE0:RE9
Control Signals
OSC2/CLKO
OSC1/CLKI
Timing
Generation
FRC/LPRC
Oscillators
Precision
Band Gap
Reference
ENVREG
Voltage
Regulator
VDDCORE/VCAP
Timer1
PORTE(1)
Divide
Support
16 x 16
W Reg Array
17x17
Multiplier
Power-up
Timer
PORTF(1)
RF0:RF8,
RF12:RF13
Oscillator
Start-up Timer
16-bit ALU
Power-on
Reset
16
Watchdog
Timer
PORTG(1)
Brown-out
Reset(2)
RG0:RG9,
RG12:RG15
VDD, VSS
Timer2/3
MCLR
Timer4/5
RTCC
10-bit
ADC
Comparators
PMP/PSP
IC1-5
Note
PWM/
OC1-5
CN1-22(1)
SPI1/2
I2C1/2
UART1/2
1:
Not all pins or features are implemented on all device pinout configurations. See Table 1-2 for I/O port pin descriptions.
2:
BOR functionality is provided when the on-board voltage regulator is enabled.
DS39747C-page 10
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 1-2:
PIC24FJ128GA FAMILY PINOUT DESCRIPTIONS
Pin Number
I/O
Input
Buffer
25
I
ANA
24
I
ANA
18
23
I
ANA
17
22
I
ANA
12
16
21
I
ANA
AN5
11
15
20
I
ANA
AN6
17
21
26
I
ANA
AN7
18
22
27
I
ANA
AN8
21
27
32
I
ANA
AN9
22
28
33
I
ANA
AN10
23
29
34
I
ANA
AN11
24
30
35
I
ANA
AN12
27
33
41
I
ANA
AN13
28
34
42
I
ANA
AN14
29
35
43
I
ANA
AN15
30
36
44
I
ANA
AVDD
19
25
30
P
—
Positive Supply for Analog Modules.
AVSS
20
26
31
P
—
Ground Reference for Analog Modules.
BCLK1
35
38
48
O
—
UART1 IrDA® Baud Clock.
BCLK2
29
35
39
O
—
UART2 IrDA® Baud Clock.
C1IN-
12
16
21
I
ANA
Comparator 1 Negative Input.
C1IN+
11
15
20
I
ANA
Comparator 1 Positive Input.
Function
64-pin
80-pin
100-pin
AN0
16
20
AN1
15
19
AN2
14
AN3
13
AN4
Description
A/D Analog Inputs.
C1OUT
21
27
32
O
—
C2IN-
14
18
23
I
ANA
Comparator 2 Negative Input.
Comparator 2 Positive Input.
C2IN+
13
17
22
I
ANA
C2OUT
22
28
33
O
—
Comparator 1 Output.
Comparator 2 Output.
CLKI
39
49
63
I
ANA
CLKO
40
50
64
O
—
System Clock Output.
CN0
48
60
74
I
ST
Interrupt-on-Change Inputs.
CN1
47
59
73
I
ST
CN2
16
20
25
I
ST
CN3
15
19
24
I
ST
CN4
14
18
23
I
ST
CN5
13
17
22
I
ST
CN6
12
16
21
I
ST
CN7
11
15
20
I
ST
CN8
4
6
10
I
ST
CN9
5
7
11
I
ST
CN10
6
8
12
I
ST
CN11
8
10
14
I
ST
CN12
30
36
44
I
ST
CN13
52
66
81
I
ST
CN14
53
67
82
I
ST
CN15
54
68
83
I
ST
CN16
55
69
84
I
ST
CN17
31
39
49
I
ST
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
© 2006 Microchip Technology Inc.
Main Clock Input Connection.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
Preliminary
DS39747C-page 11
PIC24FJ128GA FAMILY
TABLE 1-2:
PIC24FJ128GA FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
Function
I/O
100-pin
Input
Buffer
Description
64-pin
80-pin
CN18
32
40
50
I
ST
CN19
—
65
80
I
ST
CN20
—
37
47
I
ST
CN21
—
38
48
I
ST
CVREF
23
29
34
O
ANA
Comparator Voltage Reference Output.
EMUC1
15
19
24
I/O
ST
In-Circuit Emulator Clock Input/Output.
EMUD1
16
20
25
I/O
ST
In-Circuit Emulator Data Input/Output.
EMUC2
17
21
26
I/O
ST
In-Circuit Emulator Clock Input/Output.
EMUD2
18
22
27
I/O
ST
In-Circuit Emulator Data Input/Output.
ENVREG
57
71
86
I
ST
Enable for On-Chip Voltage Regulator.
Input Capture Inputs.
IC1
42
54
68
I
ST
IC2
43
55
69
I
ST
IC3
44
56
70
I
ST
IC4
45
57
71
I
ST
ST
Interrupt-on-Change Inputs.
IC5
52
64
79
I
INT0
35
45
55
I
ST
INT1
42
13
18
I
ST
INT2
43
14
19
I
ST
INT3
44
52
66
I
ST
INT4
45
53
67
I
ST
MCLR
7
9
13
I
ST
Master Clear (Device Reset) Input. This line is brought
low to cause a Reset.
OC1
46
58
72
O
—
Output Compare/PWM Outputs.
OC2
49
61
76
O
—
OC3
50
62
77
O
—
OC4
51
63
78
O
—
OC5
52
66
81
O
—
OCFA
17
21
26
I
ST
Output Compare Fault A Input.
Output Compare Fault B Input.
External Interrupt Inputs.
OCFB
30
36
44
I
ST
OSC1
39
49
63
I
ANA
Main Oscillator Input Connection.
OSC2
40
50
64
O
ANA
Main Oscillator Output Connection.
PGC1
15
19
24
I/O
ST
In-Circuit Debugger and ICSP™ Programming Clock
PGD1
16
20
25
I/O
ST
In-Circuit Debugger and ICSP Programming Data.
PGC2
17
21
26
I/O
ST
In-Circuit Debugger and ICSP™ Programming Clock.
PGD2
18
22
27
I/O
ST
In-Circuit Debugger and ICSP Programming Data.
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
DS39747C-page 12
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 1-2:
PIC24FJ128GA FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
I/O
Input
Buffer
44
I/O
ST
Parallel Master Port Address Bit 0 Input (Buffered Slave
modes) and Output (Master modes).
35
43
I/O
ST
Parallel Master Port Address Bit 1 Input (Buffered Slave
modes) and Output (Master modes).
8
10
14
O
—
6
8
12
O
—
Parallel Master Port Address (Demultiplexed Master
modes).
PMA4
5
7
11
O
—
PMA5
4
6
10
O
—
PMA6
16
24
29
O
—
PMA7
22
23
28
O
—
PMA8
32
40
50
O
—
PMA9
31
39
49
O
—
PMA10
28
34
42
O
—
PMA11
27
33
41
O
—
PMA12
24
30
35
O
—
PMA13
23
29
34
O
—
Function
64-pin
80-pin
100-pin
PMA0
30
36
PMA1
29
PMA2
PMA3
Description
PMBE
51
63
78
O
—
Parallel Master Port Byte Enable Strobe.
PMCS1
45
57
71
O
—
Parallel Master Port Chip Select 1 Strobe/Address bit 14.
PMCS2
44
56
70
O
—
Parallel Master Port Chip Select 2 Strobe/Address bit 15.
PMD0
60
76
93
I/O
ST
PMD1
61
77
94
I/O
ST
Parallel Master Port Data (Demultiplexed Master mode)
or Address/Data (Multiplexed Master modes).
PMD2
62
78
98
I/O
ST
PMD3
63
79
99
I/O
ST
PMD4
64
80
100
I/O
ST
PMD5
1
1
3
I/O
ST
PMD6
2
2
4
I/O
ST
PMD7
3
3
5
I/O
ST
PMRD
53
67
82
O
—
Parallel Master Port Read Strobe.
52
66
81
O
—
Parallel Master Port Write Strobe.
PMWR
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
© 2006 Microchip Technology Inc.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
Preliminary
DS39747C-page 13
PIC24FJ128GA FAMILY
TABLE 1-2:
PIC24FJ128GA FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
Function
I/O
64-pin
80-pin
100-pin
Input
Buffer
RA0
—
—
17
I/O
ST
RA1
—
—
38
I/O
ST
RA2
—
—
58
I/O
ST
RA3
—
—
59
I/O
ST
RA4
—
—
60
I/O
ST
RA5
—
—
61
I/O
ST
RA6
—
—
91
I/O
ST
RA7
—
—
92
I/O
ST
RA9
—
23
28
I/O
ST
RA10
—
24
29
I/O
ST
RA14
—
52
66
I/O
ST
RA15
—
53
67
I/O
ST
RB0
16
20
25
I/O
ST
RB1
15
19
24
I/O
ST
RB2
14
18
23
I/O
ST
RB3
13
17
22
I/O
ST
RB4
12
16
21
I/O
ST
RB5
11
15
20
I/O
ST
RB6
17
21
26
I/O
ST
RB7
18
22
27
I/O
ST
RB8
21
27
32
I/O
ST
RB9
22
28
33
I/O
ST
RB10
23
29
34
I/O
ST
RB11
24
30
35
I/O
ST
RB12
27
33
41
I/O
ST
RB13
28
34
42
I/O
ST
RB14
29
35
43
I/O
ST
RB15
30
36
44
I/O
ST
RC1
—
4
6
I/O
ST
RC2
—
—
7
I/O
ST
RC3
—
5
8
I/O
ST
RC4
—
—
9
I/O
ST
RC12
39
49
63
I/O
ST
RC13
47
59
73
I/O
ST
RC14
48
60
74
I/O
ST
RC15
40
50
64
I/O
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
DS39747C-page 14
Description
PORTA Digital I/O.
PORTB Digital I/O.
PORTC Digital I/O.
ST
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 1-2:
PIC24FJ128GA FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
Function
I/O
64-pin
80-pin
100-pin
Input
Buffer
RD0
46
58
72
I/O
ST
RD1
49
61
76
I/O
ST
RD2
50
62
77
I/O
ST
RD3
51
63
78
I/O
ST
RD4
52
66
81
I/O
ST
RD5
53
67
82
I/O
ST
RD6
54
68
83
I/O
ST
RD7
55
69
84
I/O
ST
RD8
42
54
68
I/O
ST
RD9
43
55
69
I/O
ST
RD10
44
56
70
I/O
ST
RD11
45
57
71
I/O
ST
RD12
—
64
79
I/O
ST
RD13
—
65
80
I/O
ST
RD14
—
37
47
I/O
ST
RD15
—
38
48
I/O
ST
RE0
60
76
93
I/O
ST
RE1
61
77
94
I/O
ST
RE2
62
78
98
I/O
ST
RE3
63
79
99
I/O
ST
RE4
64
80
100
I/O
ST
RE5
1
1
3
I/O
ST
RE6
2
2
4
I/O
ST
RE7
3
3
5
I/O
ST
RE8
—
13
18
I/O
ST
RE9
—
14
19
I/O
ST
RF0
58
72
87
I/O
ST
RF1
59
73
88
I/O
ST
RF2
34
42
52
I/O
ST
RF3
33
41
51
I/O
ST
RF4
31
39
49
I/O
ST
RF5
32
40
50
I/O
ST
RF6
35
45
55
I/O
ST
RF7
—
44
54
I/O
ST
RF8
—
43
53
I/O
ST
RF12
—
—
40
I/O
ST
RF13
—
—
39
I/O
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
© 2006 Microchip Technology Inc.
Description
PORTD Digital I/O.
PORTE Digital I/O.
PORTF Digital I/O.
ST
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
Preliminary
DS39747C-page 15
PIC24FJ128GA FAMILY
TABLE 1-2:
PIC24FJ128GA FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
I/O
Input
Buffer
90
I/O
ST
89
I/O
ST
47
57
I/O
ST
46
56
I/O
ST
4
6
10
I/O
ST
RG7
5
7
11
I/O
ST
RG8
6
8
12
I/O
ST
RG9
8
10
14
I/O
ST
RG12
—
—
96
I/O
ST
RG13
—
—
97
I/O
ST
RG14
—
—
95
I/O
ST
RG15
—
—
1
I/O
ST
RTCC
42
54
68
O
—
Real-Time Clock Alarm Output.
SCK1
35
45
55
O
—
SPI1 Serial Clock Output.
Function
64-pin
80-pin
100-pin
RG0
—
75
RG1
—
74
RG2
37
RG3
36
RG6
Description
PORTG Digital I/O.
SCK2
4
6
10
I/O
ST
SPI2 Serial Clock Output.
SCL1
37
47
57
I/O
I 2C
I2C1 Synchronous Serial Clock Input/Output.
SCL2
32
52
58
I/O
I 2C
I2C2 Synchronous Serial Clock Input/Output.
SDA1
36
46
56
I/O
I 2C
I2C1 Data Input/Output.
2
SDA2
31
53
59
I/O
I C
I2C2 Data Input/Output.
SDI1
34
44
54
I
ST
SPI1 Serial Data Input.
SDI2
5
7
11
I
ST
SPI2 Serial Data Input.
SDO1
33
43
53
O
—
SPI1 Serial Data Output.
SDO2
6
8
12
O
—
SOSCI
47
59
73
I
ANA
Secondary Oscillator/Timer1 Clock Input.
SPI2 Serial Data Output.
SOSCO
48
60
74
O
ANA
Secondary Oscillator/Timer1 Clock Output.
SS1
14
18
23
I/O
ST
Slave Select Input/Frame Select Output (SPI1).
SS2
8
10
14
I/O
ST
Slave Select Input/Frame Select Output (SPI2).
T1CK
48
60
74
I
ST
Timer1 Clock.
T2CK
—
4
6
I
ST
Timer2 External Clock Input.
T3CK
—
—
7
I
ST
Timer3 External Clock Input.
T4CK
—
5
8
I
ST
Timer4 External Clock Input.
T5CK
—
—
9
I
ST
Timer5 External Clock Input.
TCK
27
33
38
I
ST
JTAG Test Clock/Programming Clock Input.
TDI
28
34
60
I
ST
JTAG Test Data/Programming Data Input.
TDO
24
14
61
O
—
JTAG Test Data Output.
TMS
23
13
17
I
ST
JTAG Test Mode Select Input.
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
DS39747C-page 16
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 1-2:
PIC24FJ128GA FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin Number
I/O
Input
Buffer
47
I
ST
38
48
O
—
UART1 Request to Send Output.
42
52
I
ST
UART1 Receive.
33
41
51
O
DIG
UART1 Transmit Output.
U2CTS
21
27
40
I
ST
UART2 Clear to Send Input.
U2RTS
29
35
39
O
—
UART2 Request to Send Output.
U2RX
31
39
49
I
ST
UART 2 Receive Input.
U2TX
32
40
50
O
—
UART2 Transmit Output.
VDD
10, 26, 38
12, 32, 48
2, 16, 37,
46, 62
P
—
Positive Supply for Peripheral Digital Logic and I/O pins.
VDDCAP
56
70
85
P
—
External Filter Capacitor Connection (regulator enabled).
VDDCORE
56
70
85
P
—
Positive Supply for Microcontroller Core Logic (regulator
disabled).
Function
64-pin
80-pin
100-pin
U1CTS
43
37
U1RTS
35
U1RX
34
U1TX
Description
UART1 Clear to Send Input.
VREF-
15
23
28
I
ANA
A/D and Comparator Reference Voltage (Low) Input.
VREF+
16
24
29
I
ANA
A/D and Comparator Reference Voltage (High) Input.
VSS
9, 25, 41
11, 31, 51
15, 36, 45,
65, 75
P
—
Legend:
TTL = TTL input buffer
ANA = Analog level input/output
© 2006 Microchip Technology Inc.
Ground Reference for Logic and I/O pins.
ST = Schmitt Trigger input buffer
I2C™ = I2C/SMBus input buffer
Preliminary
DS39747C-page 17
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 18
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
2.0
CPU
The PIC24 CPU has a 16-bit (data) modified Harvard
architecture with an enhanced instruction set, and a
23-bit instruction word with a variable length opcode
field. The Program Counter (PC) is 24 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.
PIC24 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 (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.
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 7
addressing modes. Instructions are associated with
predefined addressing modes depending upon their
functional requirements.
© 2006 Microchip Technology Inc.
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 PIC24 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 2-1.
2.1
Programmer’s Model
The programmer’s model for the PIC24 is shown in
Figure 2-2. 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 2-1. All registers associated with the
programmer’s model are memory mapped.
Preliminary
DS39747C-page 19
PIC24FJ128GA FAMILY
FIGURE 2-1:
PIC24 CPU CORE BLOCK DIAGRAM
PSV & Table
Data Access
Control Block
Data Bus
Interrupt
Controller
16
8
16
16
Data Latch
23
23
PCU 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
DS39747C-page 20
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 2-1:
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 2-2:
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
Stack Pointer Limit
0
0
Program Counter
22
PC
7
0
TBLPAG
7
Data Table Page Address
0
Program Space Visibility
Page Address
PSVPAG
15
0
RCOUNT
15
SRH
REPEAT Loop Counter
SRL
0
— — — — — — — DC IPL RA N OV Z C
2 1 0
STATUS Register (SR)
0
15
— — — — — — — — — — — — IPL3 PSV — —
Core Control Register (CORCON)
Registers or bits shadowed for PUSH.S and POP.S instructions.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 21
PIC24FJ128GA FAMILY
2.2
CPU Control Registers
REGISTER 2-1:
SR: CPU STATUS REGISTER
Upper Byte:
U-0
U-0
U-0
U-0
U-0
U-0
U -0
R/W-0
—
—
—
—
—
—
—
DC
bit 15
bit 8
Lower Byte:
R/W-0(1)
IPL2(2)
R/W-0(1)
R/W-0(1)
(2)
(2)
IPL1
IPL0
R-0
R/W-0
R/W-0
R/W-0
R/W-0
RA
N
OV
Z
C
bit 7
bit 0
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
IPL2:IPL0: CPU Interrupt Priority Level Status bits(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)
Note 1: The IPL Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
2: The IPL bits are concatenated with the IPL3 bit (CORCON<3>) to form the CPU interrupt priority
level. The value in parentheses indicates the IPL when IPL3 = 1.
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
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
DS39747C-page 22
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 2-2:
Upper Byte:
U-0
—
bit 15
CORCON: CORE CONTROL REGISTER
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
bit 15-4
Unimplemented: Read as ‘0’
bit 3
IPL3: CPU Interrupt Priority Level Status bit
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:
U-0
—
R/C-0
IPL3
U-0
—
bit 8
R/W-0
PSV
U-0
—
U-0
—
bit 0
User interrupts are disabled when IPL3 = 1.
Legend:
2.3
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
Arithmetic Logic Unit (ALU)
The PIC24 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.
© 2006 Microchip Technology Inc.
x = Bit is unknown
The PIC24 CPU incorporates hardware support for
both multiplication and division. This includes a dedicated hardware multiplier and support hardware for
16-bit divisor division.
2.3.1
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.
Preliminary
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
DS39747C-page 23
PIC24FJ128GA FAMILY
2.3.2
DIVIDER
2.3.3
The divide block supports 32-bit/16-bit and 16-bit/16-bit
signed and unsigned integer divide operation 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. 16-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 2-2:
The PIC24 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 2-2.
INSTRUCTIONS THAT USE THE SINGLE AND MULTI-BIT SHIFT OPERATION
Instruction
ASR
MULTI-BIT SHIFT SUPPORT
Description
Arithmetic shift right source register by one bit.
ASRF
Arithmetic shift right the content of the register by one bit.
ASRW
Arithmetic shift right source register by up to 15 bits, value held in the W register referenced
within instruction.
ASRK
Arithmetic shift right source register up to 15 bits. Shift value is literal.
SL
Shift left source register by one bit.
SLF
Shift left the content of the file register by one bit.
SLW
Shift left source register by up to 15 bits, value held in the W register referenced instruction.
SLK
Shift left source register up to 15 bits. Shift value is literal.
LSR
Logical shift right source register by one bit.
LSRF
Logical shift right the content of the register by one bit.
LSRW
Logical shift right source register by up to 15 bits, value held in the W register referenced
within instruction.
LSRK
Logical shift right source register up to 15 bits. Shift value is literal.
DS39747C-page 24
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
3.0
MEMORY ORGANIZATION
As Harvard architecture devices, PIC24 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.
3.1
Program Address Space
The
program
address
memory
space
of
PIC24FJ128GA family devices is 4M instructions. The
space is addressable by a 24-bit value derived from
User Memory Space
FIGURE 3-1:
either the 23-bit Program Counter (PC) during program
execution, or from table operation or data space
remapping, as described in Section 3.3 “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 PIC24FJ128GA family of devices
are shown in Figure 3-1.
PROGRAM SPACE MEMORY MAP FOR PIC24FJ128GA FAMILY DEVICES
PIC24FJ64GA
PIC24FJ96GA
PIC24FJ128GA
GOTO Instruction
Reset Address
Interrupt Vector Table
GOTO Instruction
Reset Address
Interrupt Vector Table
GOTO Instruction
Reset Address
Interrupt Vector Table
Reserved
Reserved
Reserved
Alternate Vector Table
Alternate Vector Table
Alternate Vector Table
User Flash
Program Memory
(22K instructions)
User Flash
Program Memory
(32K instructions)
Flash Config Words
User Flash
Program Memory
(44K instructions)
000000h
000002h
000004h
0000FEh
000100h
000104h
0001FEh
000200h
00ABFEh
00AC00h
00FFFEh
010000h
Flash Config Words
Flash Config Words
0157FEh
015800h
Unimplemented
(Read ‘0’s)
Unimplemented
(Read ‘0’s)
Unimplemented
(Read ‘0’s)
7FFFFEh
800000h
Reserved
Reserved
Device Configuration
Registers
Device Configuration
Registers
Device Configuration
Registers
Reserved
Reserved
Reserved
DEVID (2)
DEVID (2)
DEVID (2)
Configuration Memory Space
Reserved
Note:
F7FFFEh
F80000h
F8000Eh
F80010h
FEFFFEh
FF0000h
FFFFFEh
Memory areas are not shown to scale.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 25
PIC24FJ128GA FAMILY
3.1.1
PROGRAM MEMORY
ORGANIZATION
3.1.3
In PIC24FJ128GA family devices, the top two 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 PIC24FJ128GA family are
shown in Table 3-1. Their location in the memory map
is shown with the other memory vectors in Figure 3-1.
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 3-2).
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 23.1 “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.
3.1.2
HARD MEMORY VECTORS
All PIC24 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.
TABLE 3-1:
PIC24 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 6.1 “Interrupt Vector
Table”.
FIGURE 3-2:
msw
Address
Device
Program
Memory
(K words)
Configuration
Word
Addresses
PIC24FJ64GA
22
00ABFCh:
00ABFEh
PIC24FJ96GA
32
00FFFCh:
00FFFEh
PIC24FJ128GA
44
0157FCh:
0157FEh
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’)
DS39747C-page 26
FLASH CONFIGURATION
WORDS FOR PIC24FJ128GA
FAMILY DEVICES
PROGRAM MEMORY ORGANIZATION
23
000001h
000003h
000005h
000007h
FLASH CONFIGURATION WORDS
Instruction Width
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
3.2
Data Address Space
The PIC24 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 3-3.
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 3.3.3 “Reading Data from
Program Memory Using Program Space Visibility”).
FIGURE 3-3:
PIC24FJ128GA family devices implement a total of
8 Kbytes of data memory. Should an EA point to a location outside of this area, an all zero word or byte will be
returned.
3.2.1
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 of each word have even addresses, while the
Most Significant Bytes have odd addresses.
DATA SPACE MEMORY MAP FOR PIC24FJ128GA FAMILY DEVICES
MSB
Address
0001h
07FFh
0801h
MSB
LSB
SFR Space
LSB
Address
0000h
07FEh
0800h
SFR
Space
Near
Data Space
Data RAM
Implemented
Data RAM
1FFFh
2001h
27FFh
2801h
1FFEh
2000h
07FEh
0800h
Unimplemented
Read as ‘0’
7FFFh
8001h
7FFFh
8000h
Program Space
Visibility Area
FFFFh
Note:
FFFEh
Data memory areas are not shown to scale.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 27
PIC24FJ128GA FAMILY
3.2.2
DATA MEMORY ORGANIZATION
AND ALIGNMENT
A sign-extend instruction (SE) 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 PICmicro®
devices and improve data space memory usage efficiency, the PIC24 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.
3.2.3
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 addressable indirectly.
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.
3.2.4
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 PIC24 core
and peripheral modules for controlling the operation of
the device.
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.
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 3-2. 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 3-3
through 3-30.
All byte loads into any W register are loaded into the
Least Significant Byte. The Most Significant Byte is not
modified.
TABLE 3-2:
NEAR DATA SPACE
IMPLEMENTED REGIONS OF SFR DATA SPACE
SFR Space Address
xx00
xx20
000h
xx60
Core
100h
200h
xx40
Timers
I2C™
300h
400h
—
ICN
Capture
UART
A/D
—
xx80
—
SPI
xxA0
xxC0
xxE0
—
Interrupts
Compare
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
500h
—
—
—
—
—
—
600h
PMP
RTC/Comp
CRC
—
—
—
700h
—
—
System
NVM/PMD
—
—
I/O
I/O
I/O
—
—
Legend: — = No implemented SFRs in this block
DS39747C-page 28
Preliminary
© 2006 Microchip Technology Inc.
© 2006 Microchip Technology Inc.
TABLE 3-3:
CPU CORE REGISTERS MAP
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
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
xxxx
PCL
002E
Program Counter, Low Word
PCH
0030
—
—
—
—
—
—
—
—
Program Counter, High Byte
0000
TBLPAG
0032
—
—
—
—
—
—
—
—
Table Page Address Pointer
0000
PSVPAG
0034
—
—
—
—
—
—
—
—
Program Memory Visibility Page Address Pointer
0000
RCOUNT
0036
SR
0042
—
—
—
—
—
—
—
DC
IPL2
IPL1
IPL0
RA
N
OV
Z
C
0000
CORCON
0044
—
—
—
—
—
—
—
—
—
—
—
—
IPL3
PSV
—
—
0000
DISICNT
0052
—
—
0000
Repeat Loop Counter
xxxx
Disable Interrupts Counter
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
xxxx
DS39747C-page 29
PIC24FJ128GA FAMILY
Preliminary
Addr
Legend:
Bit 15
All
Resets
File Name
INTERRUPT CONTROLLER REGISTER MAP
Preliminary
© 2006 Microchip Technology Inc.
Bit 0
All
Resets
OSCFAIL
—
0000
INT1EP
INT0EP
0000
OC1IF
IC1IF
INT0IF
0000
CNIF
CMIF
MI2C1IF
SI2C1IF
0000
—
—
—
SPI2IF
SPF2IF
0000
INT3IF
—
—
MI2C2IF
SI2C2IF
—
0000
—
—
—
CRCIF
U2ERIF
U1ERIF
—
0000
T2IE
OC2IE
IC2IE
—
T1IE
OC1IE
IC1IE
INT0IE
0000
—
—
—
—
INT1IE
CNIE
CMIE
MI2C1IE
SI2C1IE
0000
OC5IE
—
IC5IE
IC4IE
IC3IE
—
—
—
SPI2IE
SPF2IE
0000
—
—
—
—
INT4IE
INT3IE
—
—
MI2C2IE
SI2C2IE
—
0000
—
—
—
—
—
—
—
—
CRCIE
U2ERIE
U1ERIE
—
0000
T1IP0
—
OC1IP2
OC1IP1
OC1IP0
—
IC1IP2
IC1IP1
IC1IP0
—
INT0IP2
INT0IP1
INT0IP0
4444
T2IP1
T2IP0
—
OC2IP2
OC2IP1
OC2IP0
—
IC2IP2
IC2IP1
IC2IP0
—
—
—
—
4440
U1RXIP2
U1RXIP1
U1RXIP0
—
SPI1IP2
SPI1IP1
SPI1IP0
—
SPF1IP2
SPF1IP1
SPF1IP0
—
T3IP2
T3IP1
T3IP0
4444
—
—
—
—
—
—
—
—
—
AD1IP2
AD1IP1
AD1IP0
—
U1TXIP2
U1TXIP1
U1TXIP0
0044
00AC
—
CNIP2
CNIP1
CNIP0
—
CMIP2
CMIP1
CMIP0
—
MI2C1P2
MI2C1P1
MI2C1P0
—
SI2C1P2
SI2C1P1
SI2C1P0
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
—
—
—
—
—
MI2C2P2
MI2C2P1
MI2C2P0
—
SI2C2P2
SI2C2P1
SI2C2P0
—
—
—
—
0440
IPC13
00BE
—
—
—
—
—
INT4IP2
INT4IP1
INT4IP0
—
INT3IP2
INT3IP1
INT3IP0
—
—
—
—
0440
IPC15
00C2
—
—
—
—
—
RTCIP2
RTCIP1
RTCIP0
—
—
—
—
—
—
—
—
0400
IPC16
00C4
—
CRCIP2
CRCIP1
CRCIP0
—
U2ERIP2
U2ERIP1
U2ERIP0
—
U1ERIP2
U1ERIP1
U1ERIP0
—
—
—
—
4440
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
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
INTCON1
0080
INTCON2
0082
IFS0
Bit 4
Bit 3
Bit 2
NSTDIS
—
—
—
—
—
—
—
—
—
—
ALTIVT
DISI
—
—
—
—
—
—
—
—
—
INT4EP
INT3EP
INT2EP
0084
—
—
AD1IF
U1TXIF
U1RXIF
SPI1IF
SPF1IF
T3IF
T2IF
OC2IF
IC2IF
—
T1IF
IFS1
0086
U2TXIF
U2RXIF
INT2IF
T5IF
T4IF
OC4IF
OC3IF
—
—
—
—
INT1IF
IFS2
0088
—
—
PMPIF
—
—
—
OC5IF
—
IC5IF
IC4IF
IC3IF
IFS3
008A
—
RTCIF
—
—
—
—
—
—
—
INT4IF
IFS4
008C
—
—
—
—
—
—
—
—
—
IEC0
0094
—
—
AD1IE
U1TXIE
U1RXIE
SPI1IE
SPF1IE
T3IE
IEC1
0096
U2TXIE
U2RXIE
INT2IE
T5IE
T4IE
OC4IE
OC3IE
IEC2
0098
—
—
PMPIE
—
—
—
IEC3
009A
—
RTCIE
—
—
—
IEC4
009C
—
—
—
—
IPC0
00A4
—
T1IP2
T1IP1
IPC1
00A6
—
T2IP2
IPC2
00A8
—
IPC3
00AA
IPC4
MATHERR ADDRERR STKERR
Bit 1
PIC24FJ128GA FAMILY
DS39747C-page 30
TABLE 3-4:
© 2006 Microchip Technology Inc.
TABLE 3-5:
ICN REGISTER MAP
Bit 0
All
Resets
CN1IE
CN0IE
0000
CN17IE
CN16IE
0000
CN0PUE
0000
CN21PUE CN20PUE CN19PUE CN18PUE CN17PUE CN16PUE
0000
File Name
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
CNEN1
0060
CN15IE
CN14IE
CN13IE
CN12IE
CN11IE
CN10IE
CN9IE
CN8IE
CN7IE
CN6IE
CN5IE
CN4IE
CN3IE
CN2IE
CNEN2
0062
—
—
—
—
—
—
—
—
—
—
CN21IE
CN20IE
CN19IE
CN18IE
CNPU1
0068
CN9PUE
CN8PUE
CN7PUE
CN6PUE
CN5PUE
CN4PUE
CN3PUE
CN2PUE
CN1PUE
CNPU2
006A
—
—
—
—
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 9
Bit 8
Bit 7
Bit 6
TABLE 3-6:
CN15PUE CN14PUE CN13PUE CN12PUE CN11PUE CN10PUE
—
—
—
—
—
—
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
TIMER REGISTER MAP
Bit 15
TMR1
0100
Timer1 Register
PR1
0102
Period Register 1
T1CON
0104
TMR2
0106
Timer2 Register
xxxx
TMR3HLD
0108
Timer3 Holding Register (For 32-bit timer operations only)
xxxx
TMR3
010A
Timer3 Register
xxxx
PR2
010C
Period Register 2
FFFF
PR3
010E
Period Register 3
T2CON
0110
TON
—
TSIDL
—
—
—
—
—
—
TGATE
TCKPS1
TCKPS0
T32
—
TCS
—
0000
T3CON
0112
TON
—
TSIDL
—
—
—
—
—
—
TGATE
TCKPS1
TCKPS0
—
—
TCS
—
0000
TMR4
0114
Timer4 Register
xxxx
TMR5HLD
0116
Timer5 Holding Register (For 32-bit operations only)
xxxx
TMR5
0118
Timer5 Register
xxxx
PR4
011A
Period Register 4
FFFF
PR5
011C
Period Register 5
T4CON
011E
TON
—
TSIDL
—
—
—
—
—
—
TGATE
TCKPS1
TCKPS0
T32
—
TCS
—
0000
T5CON
0120
TON
—
TSIDL
—
—
—
—
—
—
TGATE
TCKPS1
TCKPS0
—
—
TCS
—
0000
Legend:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
—
Bit 13
TSIDL
Bit 12
—
Bit 11
—
Bit 10
—
—
—
—
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
xxxx
FFFF
TGATE
TCKPS1
TCKPS0
—
TSYNC
TCS
—
0000
FFFF
FFFF
DS39747C-page 31
PIC24FJ128GA FAMILY
Preliminary
Addr
TON
Bit 14
All
Resets
File Name
INPUT CAPTURE REGISTER MAP
File Name
Addr
IC1BUF
0140
IC1CON
0142
IC2BUF
0144
IC2CON
0146
IC3BUF
0148
IC3CON
014A
IC4BUF
014C
IC4CON
014E
IC5BUF
0150
IC5CON
0152
Legend:
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
—
—
ICSIDL
—
—
—
—
Bit 8
Bit 7
Preliminary
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ICI1
ICI0
ICOV
ICBNE
ICM2
ICM1
ICM0
ICI1
ICI0
ICOV
ICBNE
ICM2
ICM1
ICM0
ICI1
ICI0
ICOV
ICBNE
ICM2
ICM1
ICM0
ICI1
ICI0
ICOV
ICBNE
ICM2
ICM1
ICM0
ICI1
ICI0
ICOV
ICBNE
ICM2
ICM1
ICM0
0000
Bit 1
Bit 0
All
Resets
Input 1 Capture Register
—
ICTMR
xxxx
Input 2 Capture Register
—
—
ICSIDL
—
—
—
—
—
ICTMR
—
ICSIDL
—
—
—
—
—
ICTMR
—
ICSIDL
—
—
—
—
—
ICTMR
—
ICSIDL
—
—
—
—
—
ICTMR
0000
xxxx
OUTPUT COMPARE REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
© 2006 Microchip Technology Inc.
OC1RS
0180
Output Compare 1 Secondary Register
OC1R
0182
Output Compare 1 Register
OC1CON
0184
OC2RS
0186
Output Compare 2 Secondary Register
OC2R
0188
Output Compare 2 Register
OC2CON
018A
OC3RS
018C
Output Compare 3 Secondary Register
OC3R
018E
Output Compare 3 Register
OC3CON
0190
OC4RS
0192
Output Compare 4 Secondary Register
OC4R
0194
Output Compare 4 Register
OC4CON
0196
OC5RS
0198
Output Compare 5 Secondary Register
OC5R
019A
Output Compare 5 Register
OC5CON
019C
Legend:
0000
xxxx
Input 5 Capture Register
—
0000
xxxx
Input 4 Capture Register
—
0000
xxxx
Input 3 Capture Register
—
All
Resets
Bit 6
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 3-8:
File Name
Bit 15
—
—
—
—
—
—
—
—
—
—
OCSIDL
OCSIDL
OCSIDL
OCSIDL
OCSIDL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
—
—
—
—
—
Bit 5
Bit 4
Bit 3
Bit 2
xxxx
xxxx
—
OCFLT
OCTSEL
OCM2
OCM1
OCM0
0000
xxxx
xxxx
—
OCFLT
OCTSEL
OCM2
OCM1
OCM0
0000
xxxx
xxxx
—
OCFLT
OCTSEL
OCM2
OCM1
OCM0
0000
xxxx
xxxx
—
OCFLT
OCTSEL
OCM2
OCM1
OCM0
0000
xxxx
xxxx
—
OCFLT
OCTSEL
OCM2
OCM1
OCM0
0000
PIC24FJ128GA FAMILY
DS39747C-page 32
TABLE 3-7:
I2C1 REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
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
1000
I2C1STAT
0208
ACKSTAT
TRSTAT
—
—
—
BCL
GCSTAT
ADD10
IWCOL
I2COV
D/A
P
S
R/W
RBF
TBF
0000
I2C1ADD
020A
—
—
—
—
—
—
Address Register
0000
I2C1MSK
020C
—
—
—
—
—
—
Address Mask
0000
Legend:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
File Name
Baud Rate Generator
0000
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 3-10:
I2C2 REGISTER MAP
Preliminary
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
I2C2RCV
0210
—
—
—
—
—
—
—
—
Receive Register
0000
I2C2TRN
0212
—
—
—
—
—
—
—
—
Transmit Register
00FF
I2C2BRG
0214
—
—
—
—
—
—
—
I2C2CON
0216
I2CEN
—
I2CSIDL
SCLREL
IPMIEN
A10M
DISSLW
SMEN
GCEN
STREN
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
1000
I2C2STAT
0218
ACKSTAT
TRSTAT
—
—
—
BCL
GCSTAT
ADD10
IWCOL
I2CPOV
D/A
P
S
R/W
RBF
TBF
0000
I2C2ADD
021A
—
—
—
—
—
—
Address Register
0000
I2C2MSK
021C
—
—
—
—
—
—
Address Mask
0000
Legend:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
File Name
Baud Rate Generator
0000
PIC24FJ128GA FAMILY
DS39747C-page 33
TABLE 3-9:
© 2006 Microchip Technology Inc.
File Name
Addr
UART1 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 1
Bit 0
All
Resets
U1MODE
0220
UARTEN
—
USIDL
IREN
RTSMD
—
UEN1
UEN0
WAKE
LPBACK
ABAUD
RXINV
BRGH
PDSEL1
PDSEL0
STSEL
0000
U1STA
0222
UTXISEL1
UTXINV
UTXISEL0
—
UTXBRK
UTXEN
UTXBF
TRMT
URXISEL1
URXISEL0
ADDEN
RIDLE
PERR
FERR
OERR
URXDA
0110
U1TXREG
0224
—
—
—
—
—
—
—
Transmit Register
xxxx
U1RXREG
0226
—
—
—
—
—
—
—
Receive Register
0000
U1BRG
0228
Legend:
Baud Rate Generator Prescaler
TABLE 3-12:
UART2 REGISTER MAP
Preliminary
File Name
Addr
U2MODE
0230
UARTEN
U2STA
0232
UTXISEL1
U2TXREG
0234
—
U2RXREG
0236
—
U2BRG
0238
Legend:
Bit 15
Bit 14
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
WAKE
LPBACK
STSEL
0000
OERR
URXDA
0110
USIDL
IREN
RTSMD
—
UEN1
UEN0
UTXISEL0
—
UTXBRK
UTXEN
UTXBF
TRMT
—
—
—
—
—
—
Transmit Register
xxxx
—
—
—
—
—
—
Receive Register
0000
URXISEL1 URXISEL0
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
ABAUD
RXINV
BRGH
PDSEL1
ADDEN
RIDLE
PERR
FERR
Baud Rate Generator Prescaler
0000
SPI1 REGISTER MAP
Bit 14
Bit 13
SPI1STAT
0240
SPIEN
—
SPISIDL
—
—
SPI1CON1
0242
—
—
—
DISSCK
DISSDO
MODE16
SMP
CKE
SPI1CON2
0244
FRMEN
SPIFSD
SPIFPOL
—
—
—
—
—
—
SPI1BUF
0248
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
SPIBEC2 SPIBEC1 SPIBEC0
Bit 5
Bit 4
Bit 2
Bit 1
Bit 0
All
Resets
—
—
SPITBF
SPIRBF
0000
SPRE1
SPRE0
PPRE1
PPRE0
0000
—
SPIFE
SPIBEN
0000
Bit 7
Bit 6
Bit 3
—
SPIROV
—
—
SSEN
CKP
MSTEN
SPRE2
—
—
—
—
SPI1 Transmit and Receive Buffer
0000
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
© 2006 Microchip Technology Inc.
TABLE 3-14:
SPI2 REGISTER MAP
Addr
Bit 15
Bit 14
Bit 13
SPI2STAT
0260
SPIEN
—
SPISIDL
—
—
SPI2CON1
0262
—
—
—
DISSCK
DISSDO
MODE16
SMP
CKE
SPI2CON2
0264
FRMEN
SPIFSD
SPIFPOL
—
—
—
—
—
—
SPI2BUF
0268
Legend:
PDSEL0
—
UTXINV
Bit 15
File Name
All
Resets
Bit 12
Addr
Legend:
Bit 0
Bit 13
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 3-13:
File Name
0000
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
SPIBEC2 SPIBEC1 SPIBEC0
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 4
Bit 1
Bit 0
All
Resets
—
—
SPITBF
SPIRBF
0000
SPRE1
SPRE0
PPRE1
PPRE0
0000
—
SPIFE
SPIBEN
0000
Bit 6
—
SPIROV
—
—
SSEN
CKP
MSTEN
SPRE2
—
—
—
—
SPI2 Transmit and Receive Buffer
Bit 5
Bit 2
Bit 7
Bit 3
0000
PIC24FJ128GA FAMILY
DS39747C-page 34
TABLE 3-11:
© 2006 Microchip Technology Inc.
TABLE 3-15:
ADC REGISTER MAP
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
—
—
—
FORM1
FORM0
SSRC2
SSRC1
SSRC0
—
—
ASAM
SAMP
DONE
0000
AD1CON2
0322
VCFG2
VCFG1
VCFG0
OFFCAL
—
CSCNA
—
—
BUFS
—
SMPI3
SMPI2
SMPI1
SMPI0
BUFM
ALTS
0000
AD1CON3
0324
ADRC
—
—
SAMC4
SAMC3
SAMC2
SAMC1
SAMC0
ADCS7
ADCS6
ADCS5
ADCS4
ADCS3
ADCS2
ADCS1
ADCS0
0000
AD1CHS
0328
CH0NB
—
—
—
CH0SB3
CH0SB2
CH0SB1
CH0SB0
CH0NA
—
—
—
CH0SA3
CH0SA2
CH0SA1
CH0SA0
0000
AD1PCFG
032C
PCFG15
PCFG14
PCFG13
PCFG12
PCFG11
PCFG10
PCFG9
PCFG8
PCFG7
PCFG6
PCFG5
PCFG4
PCFG3
PCFG2
PCFG1
PCFG0
0000
AD1CSSL
0330
CSSL15
CSSL14
CSSL13
CSSL12
CSSL11
CSSL10
CSSL9
CSSL8
CSSL7
CSSL6
CSSL5
CSSL4
CSSL3
CSSL2
CSSL1
CSSL0
0000
Legend:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
File Name
Addr
TRISA
02C0
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
xxxx
PORTA REGISTER MAP
Bit 15
Bit 14
TRISA15(1) TRISA14(1)
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
—
—
—
TRISA10(1)
TRISA9(1)
—
RA9(1)
RA14(1)
—
—
—
RA10(1)
Bit 7
Bit 6
TRISA7(2) TRISA6(2)
Bit 5
Bit 4
Bit 3
Bit 2
TRISA3(2) TRISA2(2)
Bit 1
Bit 0
All
Resets
TRISA5(2)
TRISA4(2)
TRISA1(2)
TRISA0(2)
C6FF
—
RA7(2)
RA6(2)
RA5(2)
RA4(2)
RA3(2)
RA2(2)
RA1(2)
RA0(2)
xxxx
DS39747C-page 35
PORTA
02C2
RA15(1)
LATA
02C4
LATA15(1)
LATA14(1)
—
—
—
LATA10(1)
LATA9(1)
—
LATA7(2)
LATA6(2)
LATA5(2)
LATA4(2)
LATA3(2)
LATA2(2)
LATA1(2)
LATA0(2)
xxxx
ODCA
06C0
ODA15(1)
ODA14(1)
—
—
—
ODA10(1)
ODA9(1)
—
ODA7(2)
ODA6(2)
ODA5(2)
ODA4(2)
ODA3(2)
ODA2(2)
ODA1(2)
ODA0(2)
0000
Legend:
Note 1:
2:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
Implemented in 80-pin and 100-pin devices only.
Implemented in 100-pin devices only
PIC24FJ128GA FAMILY
Preliminary
Addr
TABLE 3-16:
Bit 15
All
Resets
File Name
© 2006 Microchip Technology Inc.
TABLE 3-17:
PORTB 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
TRISB
02C6
TRISB15
TRISB14
TRISB13
TRISB12
TRISB11
TRISB10
TRISB9
TRISB8
TRISB7
TRISB6
TRISB5
TRISB4
TRISB3
TRISB2
TRISB1
TRISB0
FFFF
PORTB
02C8
RB15
RB14
RB13
RB12
RB11
RB10
RB9
RB8
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx
LATB
02CA
LATB15
LATB14
LATB13
LATB12
LATB11
LATB10
LATB9
LATB8
LATB7
LATB6
LATB5
LATB4
LATB3
LATB2
LATB1
LATB0
xxxx
ODCB
06C6
ODB15
ODB14
ODB13
ODB12
ODB11
ODB10
ODB9
ODB8
ODB7
ODB6
ODB5
ODB4
ODB3
ODB2
ODB1
ODB0
0000
Legend:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
Bit 1
Bit 0
All
Resets
File Name
TABLE 3-18:
PORTC REGISTER MAP
Addr
TRISC
02CC
PORTC
02CE
RC15
RC14
RC13
LATTC
02D0
LATC15
LATC14
ODCC
06CC
ODC15
ODC14
Legend:
Note 1:
2:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
Implemented in 80-pin and 100-pin devices only.
Implemented in 100-pin devices only
TABLE 3-19:
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
—
—
—
—
—
—
—
—
F01E
RC12
—
—
—
—
—
—
—
RC4(2)
RC3(1)
RC2(2)
RC1(1)
—
xxxx
LATC13
LATC12
—
—
—
—
—
—
—
LATC4(2)
LATC3(1)
LATC2(2)
LATC1(1)
—
xxxx
ODC13
ODC12
—
—
—
—
—
—
—
ODC4(2)
ODC3(1)
ODC2(2)
ODC1(1)
—
0000
TRISC15 TRISC14 TRISC13 TRISC12
Bit 4
Bit 3
Bit 2
TRISC4(2) TRISC3(1) TRISC2(2) TRISC1(1)
PORTD REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
TRISD15(1) TRISD14(1) TRISD13(1) TRISD12(1)
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
TRISD
02D2
TRISD11
TRISD10
TRISD9
TRISD8
TRISD7
TRISD6
TRISD5
TRISD4
TRISD3
TRISD2
TRISD1
TRISD0
FFFF
PORTD
02D4
RD15(1)
RD14(1)
RD13(1)
RD12(1)
RD11
RD10
RD9
RD8
RD7
RD6
RD5
RD4
RD3
RD2
RD1
RD0
xxxx
LATD
02D6
LATD15(1)
LATD14(1)
LATD13(1)
LATD12(1)
LATD11
LATD10
LATD9
LATD8
LATD7
LATD6
LATD5
LATD4
LATD3
LATD2
LATD1
LATD0
xxxx
ODCD
06D2
ODD15(1)
ODD14(1)
ODD13(1)
ODD12(1)
ODD11
ODD10
ODD9
ODD8
ODD7
ODD6
ODD5
ODD4
ODD3
ODD2
ODD1
ODD0
0000
Legend:
Note 1:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
Implemented in 80-pin and 100-pin devices only.
DS39747C-page 36
PIC24FJ128GA FAMILY
Preliminary
File Name
© 2006 Microchip Technology Inc.
TABLE 3-20:
PORTE REGISTER MAP
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
TRISE7
TRISE6
TRISE5
TRISE4
TRISE3
TRISE2
TRISE1
TRISE0
03FF
RE7
RE6
RE5
RE4
RE3
RE2
RE1
RE0
xxxx
LATE8(1)
LATE7
LATE6
LATE5
LATE4
LATE3
LATE2
LATE1
LATE0
xxxx
ODE8(1)
ODE7
ODE6
ODE5
ODE4
ODE3
ODE2
ODE1
ODE0
0000
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
TRISE
02D8
—
—
—
—
—
—
PORTE
02DA
—
—
—
—
—
—
RE9(1)
RE8(1)
LATE
02DC
—
—
—
—
—
—
LATE9(1)
ODCE
06D8
—
—
—
—
—
—
ODE9(1)
Legend:
Note 1:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
Implemented in 80-pin and 100-pin devices only.
TABLE 3-21:
Bit 9
Bit 7
File Name
Bit 8
TRISE9(1) TRISE8(1)
PORTF REGISTER MAP
File Name
Addr
Bit 15
Bit 14
TRISF
02DE
—
—
Bit 13
Bit 12
TRISF13(1) TRISF12(1)
(1)
(1)
RG12
Bit 10
Bit 9
Bit 8
Bit 7
—
—
—
—
—
—
RF8(2)
RF7(2)
TRISF8(2) TRISF7(2)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
TRISF6
TRISF5
TRISF4
TRISF3
TRISF2
TRISF1
TRISF0
31FF
RF6
RF5
RF4
RF3
RF2
RF1
RF0
xxxx
02E0
—
—
LATF
02E2
—
—
LATF13(1)
LATF12(1)
—
—
—
LATF8(2)
LATF7(2)
LATF6
LATF5
LATF4
LATF3
LATF2
LATF1
LATF0
xxxx
ODCF
06DE
—
—
ODF13(1)
ODF12(1)
—
—
—
ODF8(2)
ODF7(2)
ODF6
ODF5
ODF4
ODF3
ODF2
ODF1
ODF0
0000
Legend:
Note 1:
2:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
Implemented in 100-pin devices only.
Implemented in 80-pin and 100-pin devices only.
Bit 1
Bit 0
All
Resets
PORTG REGISTER MAP
File Name
Addr
TRISG
02E4
PORTG
02E6
RG15(1)
RG14(1)
RG13(1)
RG12(1)
LATG
02E8
LATG15(1)
LATG14(1)
LATG13(1)
ODCG
06E4
ODG15(1)
ODG14(1)
ODG13(1)
Legend:
Note 1:
2:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
Implemented in 100-pin devices only
Implemented in 80-pin and 100-pin devices only.
DS39747C-page 37
TABLE 3-23:
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
—
—
TRISG9
TRISG8
TRISG7
TRISG6
—
—
TRISG3
TRISG2
—
—
RG9
RG8
RG7
RG6
—
—
RG3
RG2
RG1(2)
RG0(2)
xxxx
LATG12(1)
—
—
LATG9
LATG8
LATG7
LATG6
—
—
LATG3
LATG2
LATG1(2)
LATG0(2)
xxxx
ODG12(1)
—
—
ODG9
ODG8
ODG7
ODG6
—
—
ODG3
ODG2
ODG1(2)
ODG0(2)
0000
TRISG15(1) TRISG14(1) TRISG13(1) TRISG12(1
TRISG1(2) TRISG0(2)
F3CF
PAD CONFIGURATION MAP
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
PADCFG1
02FC
—
—
—
—
—
—
—
—
—
—
—
—
—
—
RTSECSEL
PMPTTL
0000
Legend:
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal for 100-pin devices.
PIC24FJ128GA FAMILY
Preliminary
PORTF
TABLE 3-22:
RG13
Bit 11
File Name
PARALLEL MASTER/SLAVE PORT REGISTER MAP
Addr
Bit 15
PMCON
0600
PMPEN
—
PSIDL
PMMODE
0602
BUSY
IRQM1
IRQM0
CS2
CS1
PMADDR(1)
PMDOUT1(1)
0604
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
ADRMUX1 ADRMUX0 PTBEEN PTWREN PTRDEN
INCM1
INCM0
MODE16
MODE1
MODE0
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
CSF1
CSF0
ALP
CS2P
CS1P
BEP
WRSP
RDSP
0000
WAITB1
WAITB0
WAITM3
WAITM2
WAITM1
WAITM0
WAITE1
WAITE0
0000
Parallel Port Destination Address<13:0> (Master modes)
0000
Parallel Port Data Out Register 1 (Buffers 0 and 1)
0000
PMDOUT2
0606
Parallel Port Data Out Register 2 (Buffers 2 and 3)
0000
PMDIN1
0608
Parallel Port Data In Register 1 (Buffers 0 and 1)
0000
PMPDIN2
060A
Parallel Port Data In Register 2 (Buffers 2 and 3)
PMPEN
060C
PTEN15
PTEN14
PTEN13
PTEN12
PTEN11
PTEN10
PTEN9
PTEN8
PTEN7
PTEN6
PTEN5
PTEN4
PTEN3
PTEN2
PTEN1
PTEN0
0000
PMSTAT
060E
IBF
IBOV
—
—
IB3F
IB2F
IB1F
IB0F
OBE
OBUF
—
—
OB3E
OB2E
OB1E
OB0E
0000
Legend:
Note 1:
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PMADDR and PMDOUT1 share the same physical register. The register functions as PMDOUT1 only in Slave modes, and as PMADDR only in Master modes.
TABLE 3-25:
Preliminary
File Name
Addr
ALRMVAL
0620
ALCFGRPT
0622
RTCVAL
0624
RCFGCAL(1)
0626
Legend:
Note 1:
REAL-TIME CLOCK AND CALENDAR REGISTER MAP
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
ALRMEN
CHIME
AMASK3
AMASK2
AMASK1
AMASK0
Bit 9
Bit 8
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ARPT5
ARPT4
ARPT3
ARPT2
ARPT1
ARPT0
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
Alarm Value Register Window based on APTR<1:0>
ALRMPTR1 ALRMPTR0
ARPT7
RTCEN
—
RTCWREN RTCSYNC HALFSEC
RTCOE
RTCPTR1
RTCPTR0
CAL7
CAL6
All
Resets
xxxx
ARPT6
RTCC Value Register Window based on RTCPTR<1:0>
0000
xxxx
0000
DUAL COMPARATOR REGISTER MAP
© 2006 Microchip Technology Inc.
Addr
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
CMCON
0630
CMIDL
—
C2EVT
C1EVT
C2EN
C1EN
C2OUTEN
C1OUTEN
CVRCON
0632
—
—
—
—
—
—
—
—
Legend:
Bit 7
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
RCFGCAL register Reset value dependent on type of Reset.
TABLE 3-26:
File Name
0000
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 7
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
C2INV
C1INV
C2NEG
C2POS
C1NEG
C1POS
0000
CVRR
CVRSS
CVR3
CVR2
CVR1
CVR0
0000
Bit 6
Bit 5
C2OUT
C1OUT
CVREN
CVROE
PIC24FJ128GA FAMILY
DS39747C-page 38
TABLE 3-24:
© 2006 Microchip Technology Inc.
TABLE 3-27:
File Name
CRC REGISTER MAP
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
All
Resets
CRCMPT
—
CRCGO
PLEN3
PLEN2
PLEN1
PLEN0
0000
Bit 15
Bit 14
Bit 13
CRCCON
0640
—
—
CSIDL
CRCXOR
0642
CRC XOR Polynomial Register
0000
CRCDAT
0644
CRC Data Input Register
0000
CRCWDAT
0646
CRC Result Register
0000
Legend:
Bit 12
Bit 6
Addr
VWORD4 VWORD3 VWORD2 VWORD1 VWORD0 CRCFUL
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 3-28:
SYSTEM REGISTER MAP
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
RCON
0740
TRAPR
IOPUWR
—
—
—
—
CM
VREGS
EXTR
SWR
SWDTEN
WDTO
SLEEP
IDLE
BOR
POR
xxxx(1)
OSCCON
0742
—
COSC2
COSC1
COSC0
—
NOSC2
NOSC1
NOSC0
CLKLOCK
—
LOCK
—
CF
—
SOSCEN
OSWEN
xxxx(2)
CLKDIV
0744
ROI
DOZE2
DOZE1
DOZE0
DOZEN
RCDIV2
RCDIV1
RCDIV0
—
—
—
—
—
—
—
—
OSCTUN
0748
—
—
—
—
—
—
—
—
—
—
NVM REGISTER MAP
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
NVMCON
0760
WR
WREN
WRERR
—
—
—
—
—
—
ERASE
—
—
0766
—
—
—
—
—
—
—
—
Legend:
Note 1:
Bit 3
Bit 2
Bit 1
Bit 0
NVMOP3 NVMOP2 NVMOP1 NVMOP0
NVMKEY<7:0>
All
Resets
0000(1)
0000
— = 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.
TABLE 3-30:
PMD REGISTER MAP
DS39747C-page 39
File Name
Addr
Bit 15
Bit 14
Bit 13
PMD1
0770
T5MD
T4MD
T3MD
T2MD
T1MD
—
PMD2
0772
—
—
—
IC5MD
IC4MD
IC3MD
PMD3
0774
—
—
—
—
—
CMPMD
RTCCMD
Legend:
0000
x = unknown value on Reset, — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
RCON register Reset values dependent on type of Reset.
OSCCON register Reset values dependent on the FOSC Configuration bits and by type of Reset.
TABLE 3-29:
NVMKEY
0300
Bit 12
Bit 11
Bit 10
Bit 9
— = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Bit 1
Bit 0
All
Resets
—
—
ADCMD
0000
OC3MD
OC2MD
OC1MD
0000
I2C2MD
—
0000
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
—
—
I2C1MD
U2MD
U1MD
SPI2MD
SPI1MD
IC2MD
IC1MD
—
—
—
OC5MD
OC4MD
PMPMD
CRCPMD
—
—
—
—
—
PIC24FJ128GA FAMILY
Preliminary
Legend:
Note 1:
2:
TUN<5:0>
PIC24FJ128GA FAMILY
3.2.5
3.3
SOFTWARE STACK
In addition to its use as a working register, the W15 register in PIC24 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
pre-decrements for stack pops and post-increments for
stack pushes, as shown in Figure 3-4. 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 register (SPLIM) 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 3-4:
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++]
DS39747C-page 40
Interfacing Program and Data
Memory Spaces
The PIC24 architecture uses a 24-bit wide program
space and 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 PIC24 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.
3.3.1
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 Page register
(TBLPAG) 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 register (PSVPAG) 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 3-31 and Figure 3-5 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.
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 3-31:
PROGRAM SPACE ADDRESS CONSTRUCTION
Program Space Address
Access
Space
Access Type
Instruction Access
(Code Execution)
User
TBLRD/TBLWT
(Byte/Word Read/Write)
User
<23>
<15>
<14:1>
<0>
PC<22:1>
0
0
0xx xxxx xxxx xxxx xxxx xxx0
Configuration
Program Space Visibility
(Block Remap/Read)
Note 1:
<22:16>
User
TBLPAG<7:0>
Data EA<15:0>
0xxx xxxx
xxxx xxxx xxxx xxxx
TBLPAG<7:0>
Data EA<15:0>
1xxx xxxx
xxxx xxxx xxxx xxxx
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 3-5:
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 Visibility(1)
(Remapping)
1
EA
0
PSVPAG
0
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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 41
PIC24FJ128GA FAMILY
3.3.2
DATA ACCESS FROM PROGRAM
MEMORY USING TABLE
INSTRUCTIONS
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).
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 byte select is ‘1’; the lower byte
is selected when it is ‘0’.
FIGURE 3-6:
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 4.0 “Flash
Program Memory”.
For all table operations, the area of program memory
space to be accessed is determined by the Table Page
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
00000000
020000h
00000000
030000h
00000000
‘Phantom’ Byte
TBLRDH.B (Wn<0> = 0)
TBLRDL.B (Wn<0> = 1)
TBLRDL.B (Wn<0> = 0)
TBLRDL.W
800000h
DS39747C-page 42
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.
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
3.3.3
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 of the data space EA is ‘1’ and
program space visibility is enabled by setting the PSV
bit in the Core 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 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 3-7), only the lower 16 bits of the
FIGURE 3-7:
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
© 2006 Microchip Technology Inc.
Preliminary
...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.
DS39747C-page 43
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 44
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
4.0
FLASH PROGRAM MEMORY
Note:
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 PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
4.1
The PIC24FJ128GA family of devices contains internal
Flash program memory for storing and executing application code. The memory is readable, writable and
erasable during normal operation over the entire VDD
range.
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 bits<7:0> of the TBLPAG register and the
Effective Address (EA) from a W register specified in
the table instruction, as shown in Figure 4-1.
Flash memory can be programmed in two ways:
1.
2.
In-Circuit Serial Programming (ICSP)
Run-Time Self-Programming (RTSP)
ICSP allows a PIC24FJ128GA family device to be serially programmed while in the end application circuit.
This is simply done with two lines for Programming
Clock and Programming Data (which are named PGCx
and PGDx, 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 4-1:
Table Instructions and Flash
Programming
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.
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
© 2006 Microchip Technology Inc.
1/0
TBLPAG Reg
8 bits
16 bits
24-bit EA
Preliminary
Byte
Select
DS39747C-page 45
PIC24FJ128GA FAMILY
4.2
RTSP Operation
4.3
The PIC24 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. The 8-row
erase blocks and single-row write blocks are edgealigned, from the beginning of program memory, on
boundaries of 1536 bytes and 192 bytes, respectively.
The program memory implements holding buffers that
can contain 64 instructions of programming data. Prior
to the actual programming operation, the write data
must be loaded into the buffers in sequential order. The
instructions words loaded must always be from a group
of 64 boundaries.
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. A total of
64 TBLWTL and TBLWTH instructions are required to
load the instructions.
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.
DS39747C-page 46
Control Registers
There are two SFRs used to read and write the
program Flash memory: NVMCON and NVMKEY.
The NVMCON register (Register 4-1) controls which
blocks are to be erased, which memory type is to be
programmed and the start of the programming cycle.
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 4.4 “Programming
Operations” for further details.
4.4
Programming Operations
A complete programming sequence is necessary for
programming or erasing the internal Flash in RTSP
mode. A programming operation is nominally 4 ms in
duration and 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.
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 4-1:
NVMCOM: FLASH MEMORY CONTROL REGISTER
Upper Byte:
R/SO-0(1) R/W-0(1)
WR
WREN
bit 15
R/W-0(1)
WRERR
U-0
—
Lower Byte:
U-0
R/W-0(1)
—
ERASE
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
bit 8
R/W-0(1)
R/W-0(1)
R/W-0(1)
R/W-0(1)
NVMOP3(2) NVMOP2(2) NVMOP1(2) NVMOP0(2)
bit 0
bit 15
WR: Write Control bit
1 = Initiates a Flash memory program or erase operation
The operation is self-timed and the bit is cleared by hardware once operation is complete.
0 = Program or erase operation is complete and inactive
bit 14
WREN: Write Enable bit
1 = Enable Flash program/erase operations
0 = Inhibit Flash program/erase operations
bit 13
WRERR: Write Sequence Error Flag bit
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 = Perform the erase operation specified by NVMOP3:NVMOP0 on the next WR command
0 = Perform the program operation specified by NVMOP3:NVMOP0 on the next WR command
bit 5-4
Unimplemented: Read as ‘0’
bit 3-0
NVMOP3:NVMOP0: NVM Operation Select bits(2)
1111 = Memory bulk erase operation (ERASE = 1) or no operation (ERASE = 0)
0010 = Memory row erase operation (ERASE = 1) or no operation (ERASE = 0)
0001 = Memory row program operation (ERASE = 0) or no operation (ERASE = 1)
Note 1: These bits can only be reset on POR.
2: All other combinations of NVMOP3:NVMOP0 are unimplemented.
Legend:
R = Readable bit
W = Writable bit
SO = Settable-Only bit
U = Unimplemented bit
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 47
PIC24FJ128GA FAMILY
4.4.1
PROGRAMMING ALGORITHM FOR
FLASH PROGRAM MEMORY
4.
5.
The user can program one row of program Flash 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:
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 4-1):
a) Set the NVMOP bits (NVMCOM<3:0>) to
‘0010’ to configure for block erase. Set the
ERASE (NVMCOM<6>) and WREN
(NVMCOM<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 (NVMCOM<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 4-1:
DS39747C-page 48
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 4-3.
ERASING A PROGRAM MEMORY BLOCK
; 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 4-2).
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
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
EXAMPLE 4-2:
LOADING THE WRITE BUFFERS
; 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
EXAMPLE 4-3:
INITIATING A PROGRAMMING SEQUENCE
DISI
#5
MOV
MOV
MOV
MOV
BSET
NOP
NOP
#0x55, W0
W0, NVMKEY
#0xAA, W1
W1, NVMKEY
NVMCON, #WR
© 2006 Microchip Technology Inc.
; 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
Preliminary
DS39747C-page 49
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 50
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
5.0
RESETS
Note:
The Reset module combines all Reset sources and
controls the device Master Reset Signal, SYSRST. The
following is a list of device Reset sources:
•
•
•
•
•
•
•
•
All types of device Reset will set a corresponding status
bit in the RCON register to indicate the type of Reset
(see Register 5-1). A POR 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.
POR: Power-on Reset
MCLR: Pin Reset
SWR: RESET Instruction
WDT: Watchdog Timer Reset
BOR: Brown-out Reset
TRAPR: Trap Conflict Reset
IOPUWR: Illegal Opcode Reset
UWR: Uninitialized W Register Reset
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 manual.
A simplified block diagram of the Reset module is
shown in Figure 5-1.
Note:
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.
FIGURE 5-1:
Refer to the specific peripheral or CPU
section of this manual for register Reset
states.
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
SYSRST
VDD
Brown-out
Reset
BOR
Enable Voltage Regulator
Trap Conflict
Illegal Opcode
Uninitialized W Register
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 51
PIC24FJ128GA FAMILY
REGISTER 5-1:
RCON: RESET CONTROL REGISTER
Upper Byte:
R/W-0
R/W-0
TRAPR
IOPUWR
bit 15
U-0
—
Lower Byte:
R/W-0
R/W-0
EXTR
SWR
bit 7
U-0
—
U-0
—
R/W-0
SWDTEN
U-0
—
R/W-0
WDTO
R/W-0
SLEEP
R/W-0
CM
R/W-0
VREGS
bit 8
R/W-0
IDLE
R/W-1
BOR
R/W-1
POR
bit 0
bit 15
TRAPR: Trap Reset Flag bit
1 = A Trap Conflict Reset has occurred
0 = A Trap Conflict Reset has not occurred
bit 14
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
bit 13-10 Unimplemented: Read as ‘0’
bit 9
CM: Configuration Word Mismatch Reset Flag bit
1 = A Configuration Word Mismatch Reset has occurred
0 = A Configuration Word Mismatch Reset has not occurred
bit 8
VREGS: Voltage Regulator Standby Enable bit
1 = Regulator remains active during Sleep
0 = Regulator goes to standby during Sleep
bit 7
EXTR: External Reset (MCLR) Pin bit
1 = A Master Clear (pin) Reset has occurred
0 = A Master Clear (pin) Reset has not occurred
bit 6
SWR: Software Reset (Instruction) Flag bit
1 = A RESET instruction has been executed
0 = A RESET instruction has not been executed
bit 5
SWDTEN: Software Enable/Disable of WDT bit
1 = WDT is enabled
0 = WDT is disabled
Note: If the FWDTEN Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled, regardless
of the SWDTEN bit setting.
bit 4
WDTO: Watchdog Timer Time-out Flag bit
1 = WDT time-out has occurred
0 = WDT time-out has not occurred
bit 3
SLEEP: Wake From Sleep Flag bit
1 = Device has been in Sleep mode
0 = Device has not been in Sleep mode
bit 2
IDLE: Wake-up From Idle Flag bit
1 = Device was in Idle mode
0 = Device was not in Idle mode
bit 1
BOR: Brown-out Reset Flag bit
1 = A Brown-out Reset has occurred. Note that BOR is also set after Power-on Reset.
0 = A Brown-out Reset has not occurred
bit 0
POR: Power-on Reset Flag bit
1 = A Power-up Reset has occurred
0 = A Power-up Reset has not occurred
Note:
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.
Legend:
R = Readable bit
-n = Value at POR
DS39747C-page 52
W = Writable bit
‘1’ = Bit is set
Preliminary
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 5-1:
RESET FLAG BIT OPERATION
Flag Bit
Setting Event
Clearing Event
TRAPR (RCON<15>)
Trap conflict event
POR
IOPR (RCON<14>)
Illegal opcode or uninitialized W register access
POR
EXTR (RCON<7>)
MCLR Reset
POR
SWR (RCON<6>)
RESET instruction
POR
WDTO (RCON<4>)
WDT time-out
PWRSAV instruction, POR
SLEEP (RCON<3>)
PWRSAV #SLEEP instruction
POR
IDLE (RCON<2>)
PWRSAV #IDLE instruction
POR
BOR (RCON<1>)
POR, BOR
—
POR (RCON<0>)
POR
—
Note:
5.1
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 5-2. If
clock switching is disabled, the system clock source is
always selected according to the oscillator Configuration bits. Refer to 7.0 “Oscillator Configuration” for
further details.
TABLE 5-2:
Reset Type
POR
BOR
MCLR
WDTR
OSCILLATOR SELECTION vs.
TYPE OF RESET (CLOCK
SWITCHING ENABLED)
Clock Source Determinant
Oscillator Configuration Bits
(FNOSC2:FNOSC0)
5.2
Device Reset Times
The Reset times for various types of device Reset are
summarized in Table 5-3. Note that the system Reset
signal, SYSRST, is released after the POR and PWRT
delay times expire.
The time that 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
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 53
PIC24FJ128GA FAMILY
TABLE 5-3:
Reset Type
POR
RESET DELAY TIMES FOR VARIOUS DEVICE RESETS
Clock Source
SYSRST Delay
EC, FRC, FRCDIV, LPRC TPOR + TSTARTUP + TRST
BOR
System Clock
Delay
FSCM
Delay
—
—
Notes
1, 2, 3
ECPLL, FRCPLL
TPOR + TSTARTUP + TRST
TLOCK
TFSCM
1, 2, 3, 5, 6
XT, HS, SOSC
TPOR + TSTARTUP + TRST
TOST
TFSCM
1, 2, 3, 4, 6
XTPLL, HSPLL
TPOR + TSTARTUP + TRST TOST + TLOCK
TFSCM
1, 2, 3, 4, 5, 6
EC, FRC, FRCDIV, LPRC
TSTARTUP + TRST
—
—
ECPLL, FRCPLL
TSTARTUP + TRST
TLOCK
TFSCM
2, 3, 5, 6
XT, HS, SOSC
TSTARTUP + TRST
TOST
TFSCM
2, 3, 4, 6
XTPLL, HSPLL
2, 3
TSTARTUP + TRST
TOST + TLOCK
TFSCM
MCLR
Any Clock
TRST
—
—
3
WDT
Any Clock
TRST
—
—
3
Software
Any clock
TRST
—
—
3
Illegal Opcode
Any Clock
TRST
—
—
3
Uninitialized W
Any Clock
TRST
—
—
3
Trap Conflict
Any Clock
TRST
—
—
3
Note 1:
2:
3:
4:
5:
6:
5.2.1
2, 3, 4, 5, 6
TPOR = Power-on Reset delay (10 μs nominal).
TSTARTUP = TVREG (10 μs nominal) if on-chip regulator enabled or TPWRT (64 ms nominal) if on-chip
regulator disabled.
TRST = Internal state Reset time (20 μs nominal).
TOST = Oscillator Start-up Timer. A 10-bit counter counts 1024 oscillator periods before releasing the
oscillator clock to the system.
TLOCK = PLL lock time (20 μs nominal).
TFSCM = Fail-Safe Clock Monitor delay (100 μs nominal).
5.2.2
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:
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.
• 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.
DS39747C-page 54
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
5.2.2.1
5.3
FSCM Delay for Crystal and PLL
Clock Sources
When the system clock source is provided by a crystal
oscillator and/or the PLL, a small delay, TFSCM, will
automatically be inserted after the POR and PWRT
delay times. The FSCM will not begin to monitor the
system clock source until this delay expires. The FSCM
delay time is nominally 100 μs and provides additional
time for the oscillator and/or PLL to stabilize. In most
cases, the FSCM delay will prevent an oscillator failure
trap at a device Reset when the PWRT is disabled.
© 2006 Microchip Technology Inc.
Special Function Register Reset
States
Most of the Special Function Registers (SFRs) associated with the PIC24 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 oscillator Configuration bits in the FOSC
Device Configuration register (see Table 5-2). The
RCFGCAL and EECON1 registers are only affected by
a POR.
Preliminary
DS39747C-page 55
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 56
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
6.0
INTERRUPT CONTROLLER
6.1.1
The PIC24 interrupt controller reduces the numerous
peripheral interrupt request signals to a single interrupt
request signal to the PIC24 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
6.1
Interrupt Vector Table
The Interrupt Vector Table (IVT) is shown in Figure 6-1.
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).
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.
ALTERNATE INTERRUPT VECTOR
TABLE
The Alternate Interrupt Vector Table (AIVT) is located
after the IVT as shown in Figure 6-1. 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.
6.2
Reset Sequence
A device Reset is not a true exception because the
interrupt controller is not involved in the Reset process.
The PIC24 device clears its 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.
PIC24FJ128GA family devices implement nonmaskable traps and unique interrupts. These are
summarized in Table 6-1 and Table 6-2.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 57
PIC24FJ128GA FAMILY
FIGURE 6-1:
PIC24 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
000000h
000002h
000004h
000014h
00007Ch
00007Eh
000080h
Interrupt Vector Table (IVT)(1)
0000FCh
0000FEh
000100h
000102h
000114h
Alternate Interrupt Vector Table (AIVT)(1)
00017Ch
00017Eh
000180h
0001FEh
000200h
Note 1: See Table 6-2 for the Interrupt Vector list.
TABLE 6-1:
TRAP VECTOR DETAILS
Vector Number
IVT Address
AIVT Address
Trap Source
0
000004h
000104h
Reserved
1
000006h
000106h
Oscillator Failure
2
000008h
000108h
Address Error
3
00000Ah
00010Ah
Stack Error
4
00000Ch
00010Ch
Math Error
5
00000Eh
00010Eh
Reserved
6
000010h
000110h
Reserved
7
000012h
0001172h
Reserved
DS39747C-page 58
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 6-2:
IMPLEMENTED INTERRUPT VECTORS
Interrupt Source
ADC1 Conversion Done
Vector
Number
IVT Address
13
00002Eh
Interrupt Bit Locations
AIVT
Address
Flag
Enable
Priority
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>
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>
External Interrupt 3
53
00007Eh
00017Eh
IFS3<5>
IEC3<5>
IPC13<6:4>
External Interrupt 4
54
000080h
000180h
IFS3<6>
IEC3<6>
IPC13<10:8>
I2C1 Master Event
17
000036h
000136h
IFS1<1>
IEC1<1>
IPC4<6:4>
I2C1 Slave Event
16
000034h
000034h
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>
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<13>
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>
IEC0<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>
UART1 Receiver
11
00002Ah
00012Ah
IFS0<11>
IEC0<11>
IPC2<14:12>
UART1 Transmitter
12
00002Ch
00012Ch
IFS0<12>
IEC0<12>
IPC3<2:0>
IPC16<10:8>
UART2 Error
66
000098h
000198h
IFS4<2>
IEC4<2>
UART2 Receiver
30
000050h
000150h
IFS1<14>
IEC1<14>
IPC7<10:8>
UART2 Transmitter
31
000052h
000152h
IFS1<15>
IEC1<15>
IPC7<14:12>
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 59
PIC24FJ128GA FAMILY
6.3
Interrupt Control and Status
Registers
The PIC24FJ128GA family devices implement a total
of 28 registers for the interrupt controller:
•
•
•
•
•
INTCON1
INTCON2
IFS0 through IFS4
IEC0 through IEC4
IPC0 through IPC14, and IPC16
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 IFS registers maintain all of the interrupt request
flags. Each source of interrupt has a status bit which is
set by the respective peripherals, or external signal,
and is cleared via software.
The interrupt sources are assigned to the IFSx, IECx
and IPCx registers in the same sequence that they are
listed in Table 6-2. 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 enable bit in IEC0<0> and the
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 CPU
STATUS register (SR) contains the IPL2:IPL0 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 IPL2:IPL0, also indicates the current CPU
priority level. IPL3 is a read-only bit so that trap events
cannot be masked by the user software.
All interrupt registers are described in Register 6-1
through Register 6-30, in the following pages.
The IEC registers maintain all of the interrupt enable
bits. These control bits are used to individually enable
interrupts from the peripherals or external signals.
The IPC 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.
DS39747C-page 60
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-1:
Upper Byte:
U-0
—
bit 15
SR: STATUS REGISTER (IN CPU)
U-0
—
U-0
—
U-0
—
Lower Byte:
R/W-0
R/W-0
(1,2)
IPL1(1,2)
IPL2
bit 7
bit 7-5
U-0
—
R/W-0
IPL0(1,2)
U-0
—
R-0
RA
U-0
—
R/W-0
N
R-0
DC
bit 8
R/W-0
OV
R/W-0
Z
R/W-0
C
bit 0
IPL2:IPL0: 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)
Note 1: The IPL bits are concatenated with the IPL3 bit (CORCON<3>) to form the CPU interrupt priority
level. The value in parentheses indicates the IPL if IPL3 = 1.
2: The IPL Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
.
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
REGISTER 6-2:
Upper Byte:
U-0
—
bit 15
CORCON: CORE CONTROL REGISTER
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
bit 3
x = Bit is unknown
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R/C-0
IPL3(1)
U-0
—
bit 8
R/W-0
PSV
U-0
—
U-0
—
bit 0
IPL3: CPU Interrupt Priority Level Status bit(1)
1 = CPU interrupt priority level is greater than 7; peripheral interrupts are disabled
0 = CPU interrupt priority level is 7 or less
Note 1: The IPL3 bit is concatenated with the IPL2:IPL0 bits (SR<7:5>) to form the CPU interrupt priority
level.
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 61
PIC24FJ128GA FAMILY
REGISTER 6-3:
Upper Byte:
R/W-0
NSTDIS
bit 15
INTCON1: INTERRUPT CONTROL REGISTER 1
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R/W-0
R/W-0
MATHERR ADDRERR
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’
U-0
—
U-0
—
bit 8
R/W-0
STKERR
R/W-0
OSCFAIL
U-0
—
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
DS39747C-page 62
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-4:
Upper Byte:
R/W-0
ALTIVT
bit 15
INTCON2: INTERRUPT CONTROL REGISTER 2
R-0
DISI
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R/W-0
INT4EP
R/W-0
INT3EP
bit 15
ALTIVT: Enable Alternate Interrupt Vector Table bit
1 = Use alternate vector table
0 = Use standard (default) vector table
bit 14
DISI: DISI Instruction Status bit
1 = DISI instruction is active
0 = DISI is not active
bit 13-5
Unimplemented: Read as ‘0’
bit 4
INT4EP: External Interrupt 4 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
bit 3
INT3EP: External Interrupt 3 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
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
U-0
—
R/W-0
INT2EP
U-0
—
bit 8
R/W-0
INT1EP
R/W-0
INT0EP
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 63
PIC24FJ128GA FAMILY
REGISTER 6-5:
Upper Byte:
U-0
—
bit 15
IFS0: INTERRUPT FLAG STATUS REGISTER 0
U-0
—
R/W-0
AD1IF
R/W-0
U1TXIF
Lower Byte:
R/W-0
R/W-0
T2IF
OC2IF
bit 7
R/W-0
U1RXIF
R/W-0
IC2IF
R/W-0
SPI1IF
U-0
—
R/W-0
SPF1IF
R/W-0
T1IF
R/W-0
T3IF
bit 8
R/W-0
OC1IF
R/W-0
IC1IF
R/W-0
INT0IF
bit 0
bit 15,14 Unimplemented: Read as ‘0’
bit 13
AD1IF: A/D Conversion Complete Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12
U1TXIF: UART1 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 11
U1RXIF: UART1 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 10
SPI1IF: SPI1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 9
SPF1IF: SPI1 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8
T3IF: Timer3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7
T2IF: Timer2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 6
OC2IF: Output Compare Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5
IC2IF: Input Capture Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4
Unimplemented: Read as ‘0’
bit 3
T1IF: Timer1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 2
OC1IF: Output Compare Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1
IC1IF: Input Capture Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0
INT0IF: External Interrupt 0 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
.
Legend:
R = Readable bit
-n = Value at POR
DS39747C-page 64
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-6:
IFS1: INTERRUPT FLAG STATUS REGISTER 1
Upper Byte:
R/W-0
R/W-0
U2TXIF
U2RXIF
bit 15
R/W-0
INT2IF
Lower Byte:
U-0
—
bit 7
bit 15
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
R/W-0
T5IF
U-0
—
R/W-0
T4IF
U-0
—
R/W-0
OC4IF
R/W-0
INT1IF
R/W-0
CNIF
R/W-0
OC3IF
R/W-0
CMIF
U-0
—
bit 8
R/W-0
MI2C1IF
R/W-0
SI2C1IF
bit 0
U2TXIF: UART2 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
U2RXIF: UART2 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
INT2IF: External Interrupt 2 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
T5IF: Timer5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
T4IF: Timer4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
OC4IF: Output Compare Channel 4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
OC3IF: Output Compare Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
Unimplemented: Read as ‘0’
INT1IF: External Interrupt 1 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
CNIF: Input Change Notification Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
CMIF: Comparator Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
MI2C1IF: Master I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
SI2C1IF: Slave I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 65
PIC24FJ128GA FAMILY
REGISTER 6-7:
Upper Byte:
U-0
—
bit 15
IFS2: INTERRUPT FLAG STATUS REGISTER 2
U-0
—
R/W-0
PMPIF
Lower Byte:
R/W-0
R/W-0
IC5IF
IC4IF
bit 7
U-0
—
U-0
—
R/W-0
IC3IF
U-0
—
U-0
—
R/W-0
OC5IF
U-0
—
U-0
—
bit 8
U-0
—
R/W-0
SPI2IF
R/W-0
SPF2IF
bit 0
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
SPI2IF: SPI2 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
.
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
DS39747C-page 66
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-8:
IFS3: INTERRUPT FLAG STATUS REGISTER 3
Upper Byte:
U-0
R/W-0
—
RTCIF
bit 15
U-0
—
Lower Byte:
U-0
R/W-0
—
INT4IF
bit 7
U-0
—
U-0
—
R/W-0
INT3IF
U-0
—
U-0
—
U-0
—
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 13-7
Unimplemented: Read as ‘0’
bit 6
INT4IF: External Interrupt 4 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5
INT3IF: External Interrupt 3 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4-3
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’
U-0
—
R/W-0
MI2C2IF
U-0
—
bit 8
R/W-0
SI2C2IF
U-0
—
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 67
PIC24FJ128GA FAMILY
REGISTER 6-9:
Upper Byte:
U-0
—
bit 15
IFS4: INTERRUPT FLAG STATUS REGISTER 4
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
bit 15-4
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’
U-0
—
U-0
—
U-0
—
R/W-0
CRCIF
U-0
—
bit 8
R/W-0
U2ERIF
R/W-0
U1ERIF
U-0
—
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
DS39747C-page 68
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-10:
Upper Byte:
U-0
—
bit 15
U-0
—
IEC0: INTERRUPT ENABLE CONTROL REGISTER 0
R/W-0
AD1IE
R/W-0
U1TXIE
Lower Byte:
R/W-0
R/W-0
T2IE
OC2IE
bit 7
R/W-0
U1RXIE
R/W-0
IC2IE
R/W-0
SPI1IE
U-0
—
R/W-0
SPF1IE
R/W-0
T1IE
R/W-0
OC1IE
R/W-0
T3IE
bit 8
R/W-0
IC1IE
R/W-0
INT0IE
bit 0
bit 15-14 Unimplemented: Read as ‘0’
bit 13
AD1IE: A/D Conversion Complete Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 12
U1TXIE: UART1 Transmitter Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 11
U1RXIE: UART1 Receiver Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 10
SPI1IE: SPI1 Transfer Complete Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 9
SPF1IE: SPI1 Fault Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 8
T3IE: Timer3 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 7
T2IE: Timer2 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 6
OC2IE: Output Compare Channel 2 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 5
IC2IE: Input Capture Channel 2 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 4
Unimplemented: Read as ‘0’
bit 3
T1IE: Timer1 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 2
OC1IE: Output Compare Channel 1 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 1
IC1IE: Input Capture Channel 1 Interrupt Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 0
INT0IE: External Interrupt 0 Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
.
Legend:
R = Readable bit
-n = Value at POR
© 2006 Microchip Technology Inc.
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Preliminary
DS39747C-page 69
PIC24FJ128GA FAMILY
REGISTER 6-11:
IEC1: INTERRUPT ENABLE CONTROL REGISTER 1
Upper Byte:
R/W-0
R/W-0
U2TXIE
U2RXIE
bit 15
R/W-0
INT2IE
Lower Byte:
U-0
—
bit 7
bit 15
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
R/W-0
T5IE
U-0
—
R/W-0
T4IE
U-0
—
R/W-0
OC4IE
R/W-0
INT1IE
R/W-0
CNIE
R/W-0
OC3IE
U-0
—
bit 8
R/W-0
CMIE
R/W-0
MI2C1IE
R/W-0
SI2C1IE
bit 0
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 = 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 = 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
.
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
DS39747C-page 70
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-12:
Upper Byte:
U-0
—
bit 15
U-0
—
IEC2: INTERRUPT ENABLE CONTROL REGISTER 2
R/W-0
PMPIE
Lower Byte:
R/W-0
R/W-0
IC5IE
IC4IE
bit 7
U-0
—
U-0
—
R/W-0
IC3IE
U-0
—
U-0
—
R/W-0
OC5IE
U-0
—
U-0
—
bit 8
U-0
—
R/W-0
SPI2IE
R/W-0
SPF2IE
bit 0
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
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 71
PIC24FJ128GA FAMILY
REGISTER 6-13:
IEC3: INTERRUPT ENABLE CONTROL REGISTER 3
Upper Byte:
U-0
R/W-0
—
RTCIE
bit 15
U-0
—
Lower Byte:
U-0
R/W-0
—
INT4IE
bit 7
U-0
—
U-0
—
R/W-0
INT3IE
U-0
—
U-0
—
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 13-7
Unimplemented: Read as ‘0’
bit 6
INT4IE: External Interrupt 4 Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 5
INT3IE: External Interrupt 3 Enable bit
1 = Interrupt request enabled
0 = Interrupt request not enabled
bit 4-3
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’
U-0
—
U-0
—
U-0
—
bit 8
R/W-0
MI2C2IE
R/W-0
SI2C2IE
U-0
—
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
DS39747C-page 72
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-14:
Upper Byte:
U-0
—
bit 15
IEC4: INTERRUPT ENABLE CONTROL REGISTER 4
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
bit 15-4
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’
U-0
—
U-0
—
U-0
—
R/W-0
CRCIE
R/W-0
U2ERIE
U-0
—
bit 8
R/W-0
U1ERIE
U-0
—
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 73
PIC24FJ128GA FAMILY
REGISTER 6-15:
IPC0: INTERRUPT PRIORITY CONTROL REGISTER 0
Upper Byte:
U-0
R/W-1
—
T1IP2
bit 15
R/W-0
T1IP1
R/W-0
T1IP0
Lower Byte:
U-0
R/W-1
—
IC1IP2
bit 7
bit 15
U-0
—
R/W-0
IC1IP1
R/W-1
OC1IP2
R/W-0
IC1IP0
R/W-0
OC1IP1
U-0
—
R/W-0
OC1IP0
bit 8
R/W-1
INT0IP2
R/W-0
INT0IP1
R/W-0
INT0IP0
bit 0
Unimplemented: Read as ‘0’
bit 14-12 T1IP2:T1IP0: 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
OC1IP2:OC1IP0: 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
IC1IP2:IC1IP0: 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
INT0IP2:INT0IP0: External Interrupt 0 Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
.
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
DS39747C-page 74
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-16:
IPC1: INTERRUPT PRIORITY CONTROL REGISTER 1
Upper Byte:
U-0
R/W-1
—
T2IP2
bit 15
R/W-0
T2IP1
R/W-0
T2IP0
Lower Byte:
U-0
R/W-1
—
IC2IP2
bit 7
bit 15
U-0
—
R/W-0
IC2IP1
R/W-1
OC2IP2
R/W-0
IC2IP0
R/W-0
OC2IP1
U-0
—
U-0
—
R/W-0
OC2IP0
bit 8
U-0
—
U-0
—
bit 0
Unimplemented: Read as ‘0’
bit 14-12 T2IP2:T2IP0: 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
OC2IP2:OC2IP0: 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
IC2IP2:IC2IP0: 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’
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 75
PIC24FJ128GA FAMILY
REGISTER 6-17:
IPC2: INTERRUPT PRIORITY CONTROL REGISTER 2
Upper Byte:
U-0
R/W-1
—
U1RXIP2
bit 15
R/W-0
U1RXIP1
R/W-0
U1RXIP0
Lower Byte:
U-0
R/W-1
—
SPF1IP2
bit 7
bit 15
U-0
—
R/W-0
SPF1IP1
R/W-1
SPI1IP2
R/W-0
SPF1IP0
U-0
—
R/W-0
SPI1IP1
R/W-0
SPI1IP0
bit 8
R/W-1
T3IP2
R/W-0
T3IP1
R/W-0
T3IP0
bit 0
Unimplemented: Read as ‘0’
bit 14-12 U1RXIP2:U1RXIP0: 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
SPI1IP2:SPI1IP0: 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
SPF1IP2:SPF1IP0: 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
T3IP2:T3IP0: Timer3 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
.
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
DS39747C-page 76
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-18:
Upper Byte:
U-0
—
bit 15
IPC3: INTERRUPT PRIORITY CONTROL REGISTER 3
U-0
—
U-0
—
Lower Byte:
U-0
R/W-1
—
AD1IP2
bit 7
U-0
—
U-0
—
R/W-0
AD1IP1
U-0
—
R/W-0
AD1IP0
U-0
—
U-0
—
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
AD1IP2:AD1IP0: 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
U1TXIP2:U1TXIP0: UART1 Transmitter Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
R/W-1
U1TXIP2
U-0
—
bit 8
R/W-0
U1TXIP1
R/W-0
U1TXIP0
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 77
PIC24FJ128GA FAMILY
REGISTER 6-19:
Upper Byte:
U-0
R/W-1
—
CNIP2
bit 15
IPC4: INTERRUPT PRIORITY CONTROL REGISTER 4
R/W-0
CNIP1
R/W-0
CNIP0
Lower Byte:
U-0
R/W-1
—
MI2C1P2
bit 7
bit 15
U-0
—
R/W-0
MI2C1P1
R/W-1
CMIP2
R/W-0
MI2C1P0
R/W-0
CMIP1
U-0
—
R/W-0
CMIP0
bit 8
R/W-1
SI2C1P2
R/W-0
SI2C1P1
R/W-0
SI2C1P0
bit 0
Unimplemented: Read as ‘0’
bit 14-12 CNIP2:CNIP0: 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
CMIP2:CMIP0: 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
MI2C1P2:MI2C1P0: 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
SI2C1P2:SI2C1P0: Slave I2C1 Event Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
.
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
DS39747C-page 78
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-20:
Upper Byte:
U-0
—
bit 15
IPC5: INTERRUPT PRIORITY CONTROL REGISTER 5
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
bit 15-3
Unimplemented: Read as ‘0’
bit 2-0
INT1IP2:INT1IP0: External Interrupt 1 Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
U-0
—
U-0
—
R/W-1
INT1IP2
U-0
—
bit 8
R/W-0
INT1IP1
R/W-0
INT1IP0
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 79
PIC24FJ128GA FAMILY
REGISTER 6-21:
IPC6: INTERRUPT PRIORITY CONTROL REGISTER 6
Upper Byte:
U-0
R/W-1
—
T4IP2
bit 15
R/W-0
T4IP1
R/W-0
T4IP0
Lower Byte:
U-0
R/W-1
—
OC3IP2
bit 7
bit 15
U-0
—
R/W-0
OC3IP1
R/W-1
OC4IP2
R/W-0
OC3IP0
R/W-0
OC4IP1
U-0
—
R/W-0
OC4IP0
bit 8
U-0
—
U-0
—
U-0
—
bit 0
Unimplemented: Read as ‘0’
bit 14-12 T4IP2:T4IP0: 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
OC4IP2:OC4IP0: 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
OC3IP2:OC3IP0: 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’
.
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
DS39747C-page 80
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-22:
IPC7: INTERRUPT PRIORITY CONTROL REGISTER 7
Upper Byte:
U-0
R/W-1
—
U2TXIP2
bit 15
R/W-0
U2TXIP1
R/W-0
U2TXIP0
Lower Byte:
U-0
R/W-1
—
INT2IP2
bit 7
bit 15
U-0
—
R/W-0
INT2IP1
R/W-1
U2RXIP2
R/W-0
INT2IP0
U-0
—
R/W-0
U2RXIP1
R/W-0
U2RXIP0
bit 8
R/W-1
T5IP2
R/W-0
T5IP1
R/W-0
T51P0
bit 0
Unimplemented: Read as ‘0’
bit 14-12 U2TXIP2:U2TXIP0: 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
U2RXIP2:U2RXIP0: 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
INT2IP2:INT2IP0: 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
T5IP2:T5IP0: Timer5 Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 81
PIC24FJ128GA FAMILY
REGISTER 6-23:
Upper Byte:
U-0
—
bit 15
IPC8: INTERRUPT PRIORITY CONTROL REGISTER 8
U-0
—
U-0
—
Lower Byte:
U-0
R/W-1
—
SPI2IP2
bit 7
U-0
—
U-0
—
R/W-0
SPI2IP1
U-0
—
R/W-0
SPI2IP0
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
SPI2IP2:SPI2IP0: 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
SPF2IP2:SPF2IP0: SPI2 Fault Interrupt Priority bits
111 = Interrupt is priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is priority 1
000 = Interrupt source is disabled
U-0
—
U-0
—
U-0
—
bit 8
R/W-1
SPF2IP2
R/W-0
SPF2IP1
R/W-0
SPF2IP0
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
DS39747C-page 82
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-24:
Upper Byte:
U-0
R/W-1
—
IC5IP2
bit 15
IPC9: INTERRUPT PRIORITY CONTROL REGISTER 9
R/W-0
IC5IP1
R/W-0
IC5IP0
Lower Byte:
U-0
R/W-1
—
IC3IP2
bit 7
bit 15
U-0
—
R/W-0
IC3IP1
R/W-1
IC4IP2
R/W-0
IC3IP0
R/W-0
IC4IP1
U-0
—
R/W-0
IC4IP0
bit 8
U-0
—
U-0
—
U-0
—
bit 0
Unimplemented: Read as ‘0’
bit 14-12 IC5IP2:IC5IP0: 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
IC4IP2:IC4IP0: 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
IC3IP2:IC3IP0: 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’
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 83
PIC24FJ128GA FAMILY
REGISTER 6-25:
Upper Byte:
U-0
—
bit 15
IPC10: INTERRUPT PRIORITY CONTROL REGISTER 10
U-0
—
U-0
—
Lower Byte:
U-0
R/W-1
—
OC5IP2
bit 7
U-0
—
U-0
—
R/W-0
OC5IP1
U-0
—
R/W-0
OC5IP0
U-0
—
U-0
—
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
OC5IP2:OC5IP0: 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’
U-0
—
bit 8
U-0
—
U-0
—
U-0
—
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
REGISTER 6-26:
Upper Byte:
U-0
—
bit 15
x = Bit is unknown
IPC11: INTERRUPT PRIORITY CONTROL REGISTER 11
U-0
—
U-0
—
Lower Byte:
U-0
R/W-1
—
PMPIP2
bit 7
U-0
—
U-0
—
R/W-0
PMPIP1
U-0
—
R/W-0
PMPIP0
U-0
—
U-0
—
bit 15-7
Unimplemented: Read as ‘0’
bit 6-4
PMPIP2:PMPIP0: 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’
U-0
—
bit 8
U-0
—
U-0
—
U-0
—
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
DS39747C-page 84
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-27:
Upper Byte:
U-0
—
bit 15
IPC12: INTERRUPT PRIORITY CONTROL REGISTER 12
U-0
—
U-0
—
Lower Byte:
U-0
R/W-1
—
SI2C2P2
bit 7
U-0
—
U-0
—
R/W-0
SI2C2P1
R/W-1
MI2C2P2
R/W-0
SI2C2P0
U-0
—
R/W-0
MI2C2P1
U-0
—
R/W-0
MI2C2P0
bit 8
U-0
—
U-0
—
bit 0
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8
MI2C2P2:MI2C2P0: 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
SI2C2P2:SI2C2P0: 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’
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 85
PIC24FJ128GA FAMILY
REGISTER 6-28:
Upper Byte:
U-0
—
bit 15
IPC13: INTERRUPT PRIORITY CONTROL REGISTER 13
U-0
—
U-0
—
Lower Byte:
U-0
R/W-1
—
INT3IP2
bit 7
U-0
—
U-0
—
R/W-0
INT3IP1
R/W-1
INT4IP2
R/W-0
INT3IP0
U-0
—
R/W-0
INT4IP1
R/W-0
INT4IP0
bit 8
U-0
—
U-0
—
U-0
—
bit 0
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8
INT4IP2:INT4IP0: External Interrupt 4 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
INT3IP2:INT3IP0: External Interrupt 3 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’
.
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
DS39747C-page 86
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 6-29:
Upper Byte:
U-0
—
bit 15
IPC15: INTERRUPT PRIORITY CONTROL REGISTER 15
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
R/W-1
RTCIP2
U-0
—
U-0
—
R/W-0
RTCIP1
U-0
—
R/W-0
RTCIP0
bit 8
U-0
—
U-0
—
bit 0
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8
RTCIP2:RTCIP0: 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’
.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 87
PIC24FJ128GA FAMILY
REGISTER 6-30:
IPC16: INTERRUPT PRIORITY CONTROL REGISTER 16
Upper Byte:
U-0
R/W-1
—
CRCIP2
bit 15
R/W-0
CRCIP1
R/W-0
CRCIP0
Lower Byte:
U-0
R/W-1
—
U1ERIP2
bit 7
bit 15
U-0
—
R/W-0
U1ERIP1
R/W-1
U2ERIP2
R/W-0
U1ERIP0
U-0
—
R/W-0
U2ERIP1
R/W-0
U2ERIP0
bit 8
U-0
—
U-0
—
U-0
—
bit 0
Unimplemented: Read as ‘0’
bit 14-12 CRCIP2:CRCIP0: 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
U2ERIP2:U2ERIP0: 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
U1ERIP2:U1ERIP0: 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’
.
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
DS39747C-page 88
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
6.4
Interrupt Setup Procedures
6.4.1
6.4.3
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 Control 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 IPC 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 Status
register.
Enable the interrupt source by setting the interrupt enable control bit associated with the
source in the appropriate IECx Control register.
6.4.2
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.
6.4.4
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 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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 89
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 90
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
7.0
OSCILLATOR
CONFIGURATION
The oscillator system for PIC24FJ128GA family
devices has the following features:
• On-chip 4x PLL to boost internal operating frequency
on select internal and external oscillator sources
• 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 total of four external and internal oscillator options
as clock sources, providing 11 different clock modes
A simplified diagram of the oscillator system is shown
in Figure 7-1.
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
FIGURE 7-1:
PIC24FJ128GA FAMILY CLOCK DIAGRAM
PIC24FJ128GA Family
Primary Oscillator
CLKO
XT, HS, EC
OSC1
OSC2
4 x PLL
FRC
Oscillator
8 MHz
(Nominal)
XTPLL, HSPLL,
ECPLL, FRCPLL
Postscaler
8 MHz
4 MHz
CPU
FRCDIV
CLKDIV<10:8>
LPRC
Oscillator
CLKDIV<14:12>
Postscaler
Note:
Peripherals
FRC
LPRC
31 kHz (Nominal)
Secondary Oscillator
SOSC
SOSCO
SOSCI
SOSCEN
Enable
Oscillator
Clock Control Logic
Fail-Safe
Clock
Monitor
WDT, PWRT
Clock Source Option
for other Modules
7.1
CPU Clocking Scheme
The system clock source can be provided by one of
four sources:
• Primary Oscillator (POSC) on the OSC1 and
OSC2 pins
• Secondary Oscillator (SOSC) on the SOSCI and
SOSCO pins
• Fast Internal RC (FRC) Oscillator
• Low-Power Internal RC (LPRC) Oscillator
© 2006 Microchip Technology Inc.
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 OSC2 I/O pin for some
operating modes of the primary oscillator.
Preliminary
DS39747C-page 91
PIC24FJ128GA FAMILY
7.2
Oscillator Configuration
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 23.1 “Configuration Bits” for further
details.) The Primary Oscillator Configuration bits,
POSCMD1:POSCMD0 (Configuration Word 2<1:0>),
and the Initial Oscillator Select Configuration bits,
FNOSC2:FNOSC0
(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.
TABLE 7-1:
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 7-1.
7.2.1
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 FCKSM1:FCKSM0 are
both programmed (‘00’).
CONFIGURATION BIT VALUES FOR CLOCK SELECTION
Oscillator Source
POSCMD1:
POSCMD0
FNOSC2:
FNOSC0
Note
Fast RC Oscillator with Postscaler
(FRCDIV)
Internal
00
111
1, 2
(Reserved)
Internal
00
110
1
Oscillator Mode
Low-Power RC Oscillator (LPRC)
Internal
00
101
1
Secondary
00
100
1
Primary Oscillator (HS) with PLL
Module (HSPLL)
Primary
10
011
Primary Oscillator (XT) with PLL
Module (ECPLL)
Primary
01
011
Primary Oscillator (EC) with PLL
Module (XTPLL)
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
00
001
1
Fast RC Oscillator (FRC)
Internal
00
000
1
Secondary (Timer1) Oscillator
(SOSC)
Note 1:
2:
7.3
OSC2 pin function is determined by the OSCIOFNC Configuration bit.
This is the default oscillator mode for an unprogrammed (erased) device.
Control Registers
The operation of the oscillator is controlled by three
Special Function Registers:
• OSCCON
• CLKDIV
• OSCTUN
The OSCCON register (Register 7-1) is the main control register for the oscillator. It controls clock source
switching, and allows the monitoring of clock sources.
DS39747C-page 92
The Clock Divider register (Register 7-2) controls the
features associated with Doze mode, as well as the
postscaler for the FRC oscillator.
The FRC Oscillator Tune register (Register 7-3) 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.
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 7-1:
OSCCON: OSCILLATOR CONTROL REGISTER
Upper Byte:
U-0
R-0
—
COSC2
bit 15
R-0
COSC1
Lower Byte:
R/SO-0
CLKLOCK
bit 7
U-0
—
R-0
COSC0
R/W-x(1)
NOSC2
U-0
—
R-0(2)
LOCK
U-0
—
R/W-x(1)
NOSC1
R/CO-0
CF
U-0
—
R/W-x(1)
NOSC0
bit 8
R/W-0
SOSCEN
R/W-0
OSWEN
bit 0
bit 15
Unimplemented: Read as ‘0’
bit 14-12 COSC2:COSC0: 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 (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 NOSC2:NOSC0: New 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 (HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
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
Unimplemented: Read as ‘0’
bit 5
LOCK: PLL Lock Status bit
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
Unimplemented: Read as ‘0’
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 NOSC2:NOSC0 bits
0 = Oscillator switch is complete
Note 1: Reset values for these bits are determined by the FNOSC Configuration bits.
2: Also resets to ‘0’ during any valid clock switch, or whenever a non-PLL Clock mode is selected.
Legend:
R = Readable bit
-n = Value at POR
© 2006 Microchip Technology Inc.
U = Unimplemented bit, read as ‘0’
W = Writable bit
CO = Clear-Only bit
‘1’ = Bit is set
‘0’ = Bit is cleared
Preliminary
SO = Set-Only bit
x = Bit is unknown
DS39747C-page 93
PIC24FJ128GA FAMILY
REGISTER 7-2:
CLKDIV: CLOCK DIVIDER REGISTER
Upper Byte:
R/W-0
R/W-0
ROI
DOZE2
bit 15
R/W-0
DOZE1
Lower Byte:
U-0
—
bit 7
bit 15
R/W-0
DOZE0
U-0
—
R/W-0
DOZEN(1)
U-0
—
R/W-0
RCDIV2
U-0
—
U-0
—
R/W-1
RCDIV1
R/W-1
RCDIV0
bit 8
U-0
—
U-0
—
U-0
—
bit 0
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 DOZE2:DOZE0: 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 = DOZE2:DOZE0 bits specify the CPU peripheral clock ratio
0 = CPU peripheral clock ratio set to 1:1
Note 1: This bit is automatically cleared when the ROI bit is set and an interrupt occurs.
bit 10-8
RCDIV2:RCDIV0: 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’
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
DS39747C-page 94
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 7-3:
Upper Byte:
U-0
—
bit 15
OSCTUN: FRC OSCILLATOR TUNE REGISTER
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
R/W-0
TUN5
U-0
—
R/W-0
TUN4
U-0
—
R/W-0
TUN3
U-0
—
bit 8
R/W-0
TUN2
bit 15-6
Unimplemented: Read as ‘0’
bit 5-0
TUN5:TUN0: FRC Oscillator Tuning bits
011111 = Maximum frequency deviation
011110 =
•
•
•
000001 =
000000 = Center frequency, oscillator is running at factory calibrated frequency
111111 =
•
•
•
100001 =
100000 = Minimum frequency deviation
R/W-0
TUN1
R/W-0
TUN0
bit 0
Legend:
7.4
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
Clock Switching Operation
7.4.1
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, PIC24 devices have a safeguard
lock built into the switching process.
Note:
Primary Oscillator mode has three
different submodes (XT, HS and EC)
which are determined by the POSCMD
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.
© 2006 Microchip Technology Inc.
x = Bit is unknown
ENABLING CLOCK SWITCHING
To enable clock switching, the FCKSM1 Configuration
bit in the Configuration register must be programmed to
‘0’. (Refer to Section 23.1 “Configuration Bits” for
further details.) If the FCKSM1 Configuration bit is
unprogrammed (‘1’), the clock switching function and
Fail-Safe Clock Monitor function are disabled. This is
the default setting.
The NOSC control bits (OSCCON<10:8>) do not
control the clock selection when clock switching is disabled. However, the COSC bits (OSCCON<14:12>)
will reflect the clock source selected by the FNOSC
Configuration bits.
The OSWEN control bit (OSCCON<0>) has no effect
when clock switching is disabled. It is held at ‘0’ at all
times.
Preliminary
DS39747C-page 95
PIC24FJ128GA FAMILY
7.4.2
A recommended code sequence for a clock switch
includes the following:
OSCILLATOR SWITCHING
SEQUENCE
At a minimum, performing a clock switch requires this
basic sequence:
1.
1.
2.
2.
3.
4.
5.
If
desired,
read
the
COSC
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 NOSC control
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.
Once the basic sequence is completed, the system
clock hardware responds automatically as follows:
1.
2.
3.
4.
5.
6.
The clock switching hardware compares the
COSC status bits with the new value of the
NOSC control 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>)
status 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 NOSC
bit values are transferred to the COSC status 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.
3.
4.
5.
6.
7.
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 NOSC control
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 cause of
failure.
The core sequence for unlocking the OSCCON register
and initiating a clock switch is shown in Example 7-1.
EXAMPLE 7-1:
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.b
#0x01, w0
MOV
#0x46, w2
MOV
#0x57, w3
MOV.b
w2, [w1]
MOV.b
w3, [w1]
;Start oscillator switch operation
MOV.b
w0, [w1]
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.
DS39747C-page 96
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
8.0
Note:
POWER-SAVING FEATURES
Note:
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
The PIC24FJ128GA family of devices provide 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 and Idle 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.
8.1
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 Configuration bits. The process of
changing a system clock during operation, as well as
limitations to the process, are discussed in more detail in
Section 7.0 “Oscillator Configuration”.
8.2
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. The assembly syntax of the
PWRSAV instruction is shown in Example 8-1.
EXAMPLE 8-1:
PWRSAV
PWRSAV
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”.
8.2.1
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 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 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 the
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
© 2006 Microchip Technology Inc.
; Put the device into SLEEP mode
; Put the device into IDLE mode
Preliminary
DS39747C-page 97
PIC24FJ128GA FAMILY
8.2.2
IDLE MODE
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 8.4
“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.
On wake-up from Idle, the clock is re-applied to the
CPU and instruction execution begins immediately,
starting with the instruction following the PWRSAV
instruction, or the first instruction in the ISR.
8.2.3
INTERRUPTS COINCIDENT WITH
POWER SAVE INSTRUCTIONS
Any interrupt that coincides with the execution of a
PWRSAV instruction will be held off until entry into Sleep
or Idle mode has completed. The device will then
wake-up from Sleep or Idle mode.
8.3
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 DOZE2:DOZE0 bits
(CLKDIV<14:12>). There are eight possible
configurations, from 1:1 to 1:256, with 1:1 being the
default.
DS39747C-page 98
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.
8.4
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. Power consumption
is reduced, but not by as much as the PMD bit does.
Most peripheral modules have an enable bit;
exceptions include Capture, 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.
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
9.0
Note:
I/O PORTS
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
All of the device pins (except VDD, VSS, MCLR and
OSC1/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.
9.1
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 9-1 shows
how ports are shared with other peripherals and the
associated I/O pin to which they are connected.
FIGURE 9-1:
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.
All port pins have three registers directly associated
with their operation as digital I/O. The data direction
register (TRISx) 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 latch (LATx), read the latch.
Writes to the latch, write the latch. Reads from the port
(PORTx), 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 LATx and
TRISx 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 nevertheless
regarded as a dedicated port because there is no
other competing source of outputs. An example is the
INT4 pin.
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
1
Output Enable
Output Data
0
Read TRIS
Data Bus
D
WR TRIS
CK
Q
I/O Pin
TRIS Latch
D
WR LAT +
WR Port
Q
CK
Data Latch
Read LAT
Input Data
Read Port
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 99
PIC24FJ128GA FAMILY
9.1.1
9.3
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.
9.2
Configuring Analog Port Pins
The use of the AD1PCFG and TRIS registers control
the operation of the A/D port pins. The port pins that are
desired as analog inputs must have their corresponding TRIS bit set (input). If the TRIS bit is cleared (output), the digital output level (VOH or VOL) will be
converted.
When reading the PORT register, all pins configured as
analog input channels will read as cleared (a low level).
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.
9.2.1
Input Change Notification
The input change notification function of the I/O ports
allows the PIC24FJ128GA family of devices to generate interrupt requests to the processor in response to a
change-of-state 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 22 external signals (CN0 through CN21) that may be selected
(enabled) for generating an interrupt request on a
change-of-state.
There are four control registers associated with the CN
module. The CNEN1 and CNEN2 registers 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 also has a weak pull-up connected to it.
The pull-ups act as a current source that is connected
to the pin, and eliminate the need for external resistors
when push button or keypad devices are connected.
The pull-ups are enabled separately using the CNPU1
and CNPU2 registers, which contain the control bits for
each of the CN pins. Setting any of the control bits
enables the weak pull-ups for the corresponding pins.
Note:
Pull-ups on change notification pins
should always be disabled whenever the
port pin is configured as a digital output.
I/O PORT WRITE/READ TIMING
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 9-1:
MOV
MOV
NOP
btss
0xFF00, W0
W0, TRISBB
PORTB, #13
DS39747C-page 100
PORT WRITE/READ EXAMPLE
;
;
;
;
Configure PORTB<15:8> as inputs
and PORTB<7:0> as outputs
Delay 1 cycle
Next Instruction
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
10.0
Note:
TIMER1
Figure 10-1 presents a block diagram of the 16-bit
timer module.
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
To configure Timer1 for operation:
1.
2.
The Timer1 module is a 16-bit timer which can serve as
the time counter for the Real-Time Clock, or operate as
a free-running interval timer/counter. Timer1 can
operate in three modes:
3.
4.
• 16-bit Timer
• 16-bit Synchronous Counter
• 16-bit Asynchronous Counter
5.
6.
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 10-1:
Set the TON bit (= 1).
Select the timer prescaler ratio using the
TCKPS1:TCKPS0 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, T1IP2:T1IP0, to
set the interrupt priority.
16-BIT TIMER1 MODULE BLOCK DIAGRAM
TCKPS1:TCKPS0
2
TON
SOSCO/
T1CK
1x
SOSCEN
SOSCI
Gate
Sync
01
TCY
00
Prescaler
1, 8, 64, 256
TGATE
TCS
TGATE
1
Q
D
0
Q
CK
Set T1IF
0
Reset
TMR1
1
Equal
Comparator
Sync
TSYNC
PR1
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 101
PIC24FJ128GA FAMILY
REGISTER 10-1: T1CON: TIMER1 CONTROL REGISTER
Upper Byte:
R/W-0
TON
bit 15
U-0
—
R/W-0
TSIDL
Lower Byte:
U-0
R/W-0
—
TGATE
bit 7
U-0
—
U-0
—
R/W-0
TCKPS1
U-0
—
R/W-0
TCKPS0
U-0
—
U-0
—
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
TCKPS1:TCKPS0: 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 pin T1CK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0
Unimplemented: Read as ‘0’
U-0
—
bit 8
R/W-0
TSYNC
R/W-0
TCS
U-0
—
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
DS39747C-page 102
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
11.0
Note:
TIMER2/3 AND TIMER4/5
To configure Timer2/3 or Timer4/5 for 32-bit operation:
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
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.
As a 32-bit timer, Timer2/3 and Timer4/5 operate in
three modes:
• Two independent 16-bit timers (Timer2 and
Timer3) with all 16-bit operating modes (except
Asynchronous Counter mode)
• Single 32-bit Timer
• Single 32-bit Synchronous Counter
4.
5.
Set the T32 bit (T2CON<3> or T4CON<3> = 1).
Select the prescaler ratio for Timer2 or Timer4
using the TCKPS1:TCKPS0 bits.
Set the Clock and Gating modes using the TCS
and TGATE bits.
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,
T3IP2:T3IP0 or T5IP2:T5IP0, 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.
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)
To configure any of the timers for individual 16-bit
operation:
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 11-1; T3CON and
T5CON are shown in Register 11-2.
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:
3.
6.
They also support these features:
•
•
•
•
•
1.
2.
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
TCKPS1:TCKPS0 bits.
Set the Clock and Gating modes using the TCS
and TGATE bits.
Load the timer period value into the PRx register.
If interrupts are required, set the interrupt enable
bit, TxIE; use the priority bits, TxIP2:TxIP0, to
set the interrupt priority.
Set the TON bit (TxCON<15> = 1).
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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 103
PIC24FJ128GA FAMILY
FIGURE 11-1:
TIMER2/3 AND TIMER4/5 (32-BIT) BLOCK DIAGRAM
TON
T2CK
(T4CK)
TCKPS1:TCKPS0
2
1x
Gate
Sync
01
TCY
00
Prescaler
1, 8, 64, 256
TGATE
TGATE
TCS
Q
1
Set T3IF (T5IF)
Q
0
PR3
(PR5)
ADC Event Trigger*
Equal
D
CK
PR2
(PR4)
Comparator
MSB
LSB
TMR3
(TMR5)
Reset
TMR2
(TMR4)
Sync
16
Read TMR2 (TMR4)
Write TMR2 (TMR4)
16
TMR3HLD
(TMR5HLD)
16
Data Bus<15:0>
Note:
*
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 ADC Event Trigger is available only on Timer4/5.
DS39747C-page 104
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
FIGURE 11-2:
TIMER2 AND TIMER4 (16-BIT SYNCHRONOUS) BLOCK DIAGRAM
TON
T2CK
(T4CK)
TCKPS1:TCKPS0
2
1x
Gate
Sync
Prescaler
1, 8, 64, 256
01
00
TGATE
TCS
TCY
1
Set T2IF (T4IF)
0
Reset
Equal
Q
D
Q
CK
TGATE
TMR2 (TMR4)
Sync
Comparator
PR2 (PR4)
FIGURE 11-3:
TIMER3 AND TIMER5 (16-BIT ASYNCHRONOUS) BLOCK DIAGRAM
T3CK
(T5CK)
Sync
1x
TON
TCKPS1:TCKPS0
2
Prescaler
1, 8, 64, 256
01
00
TGATE
TCY
1
Set T3IF (T5IF)
0
Reset
Q
D
Q
CK
TCS
TGATE
TMR3 (TMR5)
ADC Event Trigger*
Equal
Comparator
PR3 (PR5)
*
The ADC Event Trigger is available only on Timer4/5.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 105
PIC24FJ128GA FAMILY
REGISTER 11-1:
Upper Byte:
R/W-0
TON
bit 15
U-0
—
TxCON: TIMER2 AND TIMER4 CONTROL REGISTER
R/W-0
TSIDL
Lower Byte:
U-0
R/W-0
—
TGATE
bit 7
U-0
—
U-0
—
R/W-0
TCKPS1
U-0
—
R/W-0
TCKPS0
U-0
—
R/W-0
T32
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 enabled
0 = Gated time accumulation disabled
bit 5-4
TCKPS1:TCKPS0: Timer2 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 = Timerx and Timery form a single 32-bit timer
0 = Timerx and Timery act as two 16-bit timers
bit 2
Unimplemented: Read as ‘0’
bit 1
TCS: Timerx Clock Source Select bit
1 = External clock from pin TxCK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0
Unimplemented: Read as ‘0’
Note:
U-0
—
bit 8
U-0
—
R/W-0
TCS
U-0
—
bit 0
In 32-bit mode, T3CON control bits do not affect 32-bit timer operation.
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
DS39747C-page 106
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 11-2:
Upper Byte:
R/W-0
TON(1)
bit 15
U-0
—
TyCON: TIMER3 AND TIMER5 CONTROL REGISTER
R/W-0
TSIDL(1)
Lower Byte:
U-0
R/W-0
—
TGATE(1)
bit 7
U-0
—
U-0
—
U-0
—
R/W-0
R/W-0
(1)
TCKPS1
TCKPS0(1)
U-0
—
U-0
—
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 enabled
0 = Gated time accumulation disabled
bit 5-4
TCKPS1:TCKPS0: 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)
1 = External clock from pin TyCK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0
Unimplemented: Read as ‘0’
U-0
—
bit 8
U-0
—
R/W-0
TCS(1)
U-0
—
bit 0
Note 1: When 32-bit operation is enabled (T2CON<3> = 1), these bits have no effect on Timery
operation; all timer functions are set through T2CON.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 107
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 108
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
12.0
INPUT CAPTURE
Note:
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
FIGURE 12-1:
INPUT CAPTURE BLOCK DIAGRAM
From 16-bit Timers
TMRy
TMRx
16
1
Prescaler
Counter
(1, 4, 16)
16
0
FIFO
R/W
Logic
Edge Detection Logic
and
Clock Synchronizer
ICTMR
(ICxCON<7>)
ICx pin
ICM<2:0>(ICxCON<2:0>)
Mode Select
FIFO
3
ICOV, ICBNE(ICxCON<4:3>)
ICxBUF
ICI<1:0>
ICxCON
Interrupt
Logic
System Bus
Set Flag ICxIF
(in IFSn Register)
Note: An ‘x’ in a signal, register or bit name denotes the number of the capture channel.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 109
PIC24FJ128GA FAMILY
12.1
Input Capture Registers
REGISTER 12-1:
Upper Byte:
U-0
—
bit 15
ICxCON: INPUT CAPTURE x CONTROL REGISTER
U-0
—
R/W-0
ICSIDL
U-0
—
Lower Byte:
R/W-0
R/W-0
ICTMR
ICI1
bit 7
R/W-0
ICI0
U-0
—
U-0
—
U-0
—
U-0
—
bit 8
R-0, HC
ICOV
R-0, HC
ICBNE
R/W-0
ICM2
R/W-0
ICM1
R/W-0
ICM0
bit 0
bit 15-14 Unimplemented: Read as ‘0’
bit 13
ICSIDL: Input Capture x Module Stop in Idle Control bit
1 = Input capture module will halt in CPU Idle mode
0 = Input capture module will continue to operate in CPU Idle mode
bit 12-8
Unimplemented: Read as ‘0’
bit 7
ICTMR: Input Capture x Timer Select bit
1 = TMR2 contents are captured on capture event
0 = TMR3 contents are captured on capture event
bit 6-5
ICI1:ICI0: 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 (Read-Only) bit
1 = Input capture overflow occurred
0 = No input capture overflow occurred
bit 3
ICBNE: Input Capture x Buffer Empty Status (Read-Only) bit
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
ICM2:ICM0: Input Capture x Mode Select bits
111 = 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 = Capture mode, every 16th rising edge
100 = Capture mode, every 4th rising edge
011 = Capture mode, every rising edge
010 = Capture mode, every falling edge
001 = Capture mode, every edge (rising and falling) – ICI<1:0> does not control interrupt generation
for this mode
000 = Input capture module turned off
Note:
Timer selections may vary. Refer to the device data sheet for details.
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HS = Set in Hardware
HC = Cleared in Hardware
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
DS39747C-page 110
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
13.0
Note:
13.1
OUTPUT COMPARE
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
Setup for Single Output Pulse
Generation
When the OCM control bits (OCxCON<2:0>) are set to
‘100’, the selected output compare channel initializes
the OCx pin to the low state and generates a single output pulse.
To generate a single output pulse, the following steps
are required (these steps assume the timer source is
initially turned off, but this is not a requirement for the
module operation):
1.
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.
2. Calculate time to the rising edge of the output
pulse relative to the TMRy start value (0000h).
3. 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.
4. Write the values computed in steps 2 and 3
above into the Compare register, OCxR, and the
Secondary
Compare
register,
OCxRS,
respectively.
5. Set Timer Period register, PRy, to value equal to
or greater than value in OCxRS, the Secondary
Compare register.
6. Set the OCM bits to ‘100’ and the OCTSEL
(OCxCON<3>) bit to the desired timer source.
The OCx pin state will now be driven low.
7. Set the TON (TyCON<15>) bit to ‘1’, which
enables the compare time base to count.
8. Upon the first match between TMRy and OCxR,
the OCx pin will be driven high.
9. When the incrementing timer, TMRy, matches the
Secondary Compare register, OCxRS, the
second and trailing edge (high-to-low) of the pulse
is driven onto the OCx pin. No additional pulses
are driven onto the OCx pin and it remains at low.
As a result of the second compare match event,
the OCxIF interrupt flag bit is set, which will
result in an interrupt if it is enabled, by setting
the OCxIE bit. For further information on peripheral interrupts, refer to Section 6.0 “Interrupt
Controller”.
10. To initiate another single pulse output, change the
Timer and Compare register settings, if needed,
and then issue a write to set the OCM bits to ‘100’.
Disabling and re-enabling of the timer and clearing the TMRy register are not required, but may
be advantageous for defining a pulse from a
known event time boundary.
© 2006 Microchip Technology Inc.
The output compare module does not have to be disabled after the falling edge of the output pulse. Another
pulse can be initiated by rewriting the value of the
OCxCON register.
13.2
Setup for Continuous Output
Pulse Generation
When the OCM control bits (OCxCON<2:0>) are set to
‘101’, the selected output compare channel initializes
the OCx pin to the low state and generates output
pulses on each and every compare match event.
For the user to configure the module for the generation
of a continuous stream of output pulses, the following
steps are required (these steps assume the timer
source is initially turned off, but this is not a requirement
for the module operation):
1.
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.
2. Calculate time to the rising edge of the output
pulse relative to the TMRy start value (0000h).
3. 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.
4. Write the values computed in step 2 and 3
above into the Compare register, OCxR, and the
Secondary
Compare
register,
OCxRS,
respectively.
5. Set Timer Period register, PRy, to value equal to
or greater than value in OCxRS, the Secondary
Compare register.
6. Set the OCM bits to ‘101’ and the OCTSEL bit to
the desired timer source. The OCx pin state will
now be driven low.
7. Enable the compare time base by setting the TON
(TyCON<15>) bit to ‘1’.
8. Upon the first match between TMRy and OCxR,
the OCx pin will be driven high.
9. When the compare time base, TMRy, matches
the Secondary Compare register, OCxRS, the
second and trailing edge (high-to-low) of the pulse
is driven onto the OCx pin.
10. As a result of the second compare match event,
the OCxIF interrupt flag bit set.
11. When the compare time base and the value in its
respective Period register match, the TMRy
register resets to 0x0000 and resumes counting.
12. Steps 8 through 11 are repeated and a continuous
stream of pulses is generated, indefinitely. The
OCxIF flag is set on each OCxRS-TMRy compare
match event.
Preliminary
DS39747C-page 111
PIC24FJ128GA FAMILY
13.3
Pulse-Width Modulation Mode
EQUATION 13-1:
The following steps should be taken when configuring
the output compare module for PWM operation:
1.
2.
3.
4.
5.
6.
PWM Period = [(PRy) + 1] • TCY • (Timer Prescale Value)
where:
PWM Frequency = 1/[PWM Period]
Set the PWM period by writing to the selected
Timer Period register (PRy).
Set the PWM duty cycle by writing to the OCxRS
register.
Write the OCxR register with the initial duty
cycle.
Enable interrupts, if required, for the timer and
output compare modules. The output compare
interrupt is required for PWM Fault pin utilization.
Configure the output compare module for one of
two PWM operation modes by writing to the Output
Compare
mode
bits
OCM<2:0>
(OCxCON<2:0>).
Set the TMRy prescale value and enable the
time base by setting TON (TxCON<15>) = 1.
Note:
13.3.1
Note 1: Based on TCY = FOSC/2, Doze mode and
PLL are disabled.
Note:
13.3.2
A PRy value of N will produce a PWM
period of N + 1 time base count cycles. For
example, a value of 7 written into the PRy
register will yield a period consisting of
8 time base cycles.
PWM DUTY CYCLE
The PWM duty cycle is specified by writing to the
OCxRS register. The OCxRS register can be written to
at any time, but the duty cycle value is not latched into
OCxR until a match between PRy and TMRy occurs
(i.e., the period is complete). This provides a double
buffer for the PWM duty cycle and is essential for glitchless PWM operation. In the PWM mode, OCxR is a
read-only register.
The OCxR register should be initialized
before the output compare module is first
enabled. The OCxR register becomes a
Read-Only Duty Cycle register when the
module is operated in the PWM modes.
The value held in OCxR will become the
PWM duty cycle for the first PWM period.
The contents of the Duty Cycle Buffer
register, OCxRS, will not be transferred
into OCxR until a time base period match
occurs.
Some important boundary parameters of the PWM duty
cycle include:
• If the Duty Cycle register, OCxR, is loaded with
0000h, the OCx pin will remain low (0% duty cycle).
• If OCxR is greater than PRy (Timer Period register),
the pin will remain high (100% duty cycle).
• If OCxR is equal to PRy, the OCx pin will be low
for one time base count value and high for all
other count values.
PWM PERIOD
The PWM period is specified by writing to PRy, the
Timer Period register. The PWM period can be
calculated using Equation 13-1.
EQUATION 13-2:
CALCULATING THE PWM
PERIOD(1)
See Example 13-1 for PWM mode timing details.
Table 13-1 shows example PWM frequencies and
resolutions for a device operating at 10 MIPS.
CALCULATION FOR MAXIMUM PWM RESOLUTION(1)
log10
Maximum PWM Resolution (bits) =
(F
PWM
FCY
• (Timer Prescale Value)
bits
log10(2)
)
Note 1: Based on TCY = FOSC/2, Doze mode and PLL are disabled.
DS39747C-page 112
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
PWM PERIOD AND DUTY CYCLE CALCULATIONS(1)
EXAMPLE 13-1:
1. Find the Period register value for a desired PWM frequency of 52.08 kHz, where FOSC = 8 MHz with PLL (32 MHz device
clock rate) and a Timer2 prescaler setting of 1:1.
TCY = 2/FOSC = 62.5 ns
PWM Period = 1/PWM Frequency = 1/52.08 kHz = 19.2 μs
PWM Period = (PR2 + 1) • TCY • (Timer 2 Prescale Value)
19.2 μs
= (PR2 + 1) • 62.5 ns • 1
PR2
= 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 = FOSC/2, Doze mode and PLL are disabled.
TABLE 13-1:
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (FCY = 4 MHz)(1)
PWM Frequency
7.6 Hz
61 Hz
122 Hz
977 Hz
3.9 kHz
31.3 kHz
125 kHz
Timer Prescaler Ratio
8
1
1
1
1
1
1
Period Register Value
FFFFh
FFFFh
7FFFh
0FFFh
03FFh
007Fh
001Fh
16
16
15
12
10
7
5
Resolution (bits)
Note 1:
Based on TCY = FOSC/2, Doze mode and PLL are disabled.
TABLE 13-2:
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (FCY = 16 MHz)(1)
PWM Frequency
30.5 Hz
244 Hz
488 Hz
3.9 kHz
15.6 kHz
125 kHz
500 kHz
Timer Prescaler Ratio
8
1
1
1
1
1
1
Period Register Value
FFFFh
FFFFh
7FFFh
0FFFh
03FFh
007Fh
001Fh
16
16
15
12
10
7
5
Resolution (bits)
Note 1:
Based on TCY = FOSC/2, Doze mode and PLL are disabled.
FIGURE 13-1:
OUTPUT COMPARE MODULE BLOCK DIAGRAM
Set Flag bit
OCxIF(1)
OCxRS(1)
Output
Logic
OCxR(1)
3
OCM2:OCM0
Mode Select
Comparator
0
16
OCTSEL
1
0
S Q
R
OCx(1)
Output Enable
OCFA or OCFB(2)
1
16
TMR register inputs
from time bases
(see Note 3).
Period match signals
from time bases
(see Note 3).
Note 1: Where ‘x’ is shown, reference is made to the registers associated with the respective output compare channels 1 through 8.
2: OCFA pin controls OC1-OC4 channels. OCFB pin controls OC5-OC8 channels.
3: Each output compare channel can use one of two selectable time bases. Refer to the device data sheet for the time
bases associated with the module.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 113
PIC24FJ128GA FAMILY
13.4
Output Compare Register
REGISTER 13-1:
Upper Byte:
U-0
—
bit 15
OCxCON: OUTPUT COMPARE x CONTROL REGISTER
U-0
—
R/W-0
OCSIDL
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R-0 HC
OCFLT
R/W-0
OCTSEL
U-0
—
U-0
—
bit 8
R/W-0
OCM2
R/W-0
OCM1
R/W-0
OCM0
bit 0
bit 15-14 Unimplemented: Read as ‘0’
bit 13
OCSIDL: Stop Output Compare x in Idle Mode Control bit
1 = Output Compare x will halt in CPU Idle mode
0 = Output Compare x will continue to operate in CPU Idle mode
bit 12-5
Unimplemented: Read as ‘0’
bit 4
OCFLT: PWM Fault Condition Status bit
1 = PWM Fault condition has occurred (cleared in HW only)
0 = No PWM Fault condition has occurred (this bit is only used when OCM<2:0> = 111)
bit 3
OCTSEL: Output Compare x Timer Select bit
1 = Timer3 is the clock source for Output Compare x
0 = Timer2 is the clock source for Output Compare x
Note:
bit 2-0
Refer to the device data sheet for specific time bases available to the output compare module.
OCM2:OCM0: Output Compare x Mode Select bits
111 = PWM mode on OCx, Fault pin enabled
110 = PWM mode on OCx, Fault pin disabled
101 = Initialize OCx pin low, generate continuous output pulses on OCx pin
100 = Initialize OCx pin low, generate single output pulse on OCx pin
011 = Compare event toggles OCx pin
010 = Initialize OCx pin high, compare event forces OCx pin low
001 = Initialize OCx pin low, compare event forces OCx pin high
000 = Output compare channel is disabled
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HS = Set in Hardware
HC = Cleared in Hardware
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
DS39747C-page 114
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
14.0
SERIAL PERIPHERAL
INTERFACE (SPI)
To set up the SPI module for the Standard Master mode
of operation:
1.
Note:
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
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’s SPI and SIOP
interfaces.
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:
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 modes. A total
of four framed SPI configurations are supported.
2.
3.
4.
5.
To set up the SPI module for the Standard Slave mode
of operation:
1.
2.
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
3.
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.
A block diagram of the module is shown in Figure 14-1.
Depending on the pin count, devices of the
PIC24FJ128GA family offer one or two SPI modules on
a single device.
Note:
If using interrupts:
a) Clear the SPIxIF bit in the respective IFSn
register.
b) Set the SPIxIE bit in the respective IECn
register.
c) Write the SPIxIP bits in the respective IPCn
register to set the interrupt priority.
Write the desired settings to the SPIxCON
register 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.
4.
5.
6.
7.
Clear the SPIxBUF register.
If using interrupts:
a) Clear the SPIxIF bit in the respective IFSn
register.
b) Set the SPIxIE bit in the respective IECn
register.
c) Write the SPIxIP bits in the respective IPCn
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
(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>).
In this section, the SPI modules are
referred to together as SPIx or separately
as SPI1 and SPI2. Special Function Registers will follow a similar notation. For
example, SPIxCON refers to the control
register for the SPI1 or SPI2 module.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 115
PIC24FJ128GA 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 IFSn
register.
b) Set the SPIxIE bit in the respective IECn
register.
c) Write the SPIxIP bits in the respective IPCn
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 14-1:
3.
4.
5.
6.
7.
8.
SPI MODULE BLOCK DIAGRAM
SCKx
SSx
Clear the SPIxBUF register.
If using interrupts:
• Clear the SPIxIF bit in the respective IFSn
register.
• Set the SPIxIE bit in the respective IECn
register.
• Write the SPIxIP bits in the respective IPCn
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>).
1:1 to 1:8
Secondary
Prescaler
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
bit0
SDIx
FCY
SPIxSR
Transfer
Transfer
8-Level FIFO Buffer
(Enhanced Modes)
SPIxBUF(1)
Read SPIxBUF
Write SPIxBUF
16
Internal Data Bus
Note 1: In Standard modes, data is transferred directly between SPIxSR and SPIxBUF.
DS39747C-page 116
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 14-1:
Upper Byte:
R/W-0
SPIEN
bit 15
U-0
—
SPIxSTAT: SPIx STATUS AND CONTROL REGISTER
R/W-0
SPISIDL
U-0
—
Lower Byte:
U-0
R/C-0
—
SPIROV
bit 7
U-0
—
U-0
—
R-0
SPIBEC2
U-0
—
R-0
SPIBEC1
U-0
—
U-0
—
R-0
SPIBEC0
bit 8
R-0
SPITBF
R-0
SPIRBF
bit 0
bit 15
SPIEN: SPIx Enable bit
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 SPIBEC2:SPIBEC0: SPIx Buffer Element Count bits
Master mode:
Number of SPI transfers pending.
Slave mode:
Number of SPI transfers unread.
bit 7
Unimplemented: Read as ‘0’
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 5-2
Unimplemented: Read as ‘0’
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 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.
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
S = Settable bit
C = Clearable bit
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 117
PIC24FJ128GA FAMILY
REGISTER 14-2:
Upper Byte:
U-0
—
bit 15
SPIXCON1: SPIx CONTROL REGISTER 1
U-0
—
U-0
—
R/W-0
DISSCK
Lower Byte:
R/W-0
R/W-0
SSEN
CKP
bit 7
R/W-0
DISSDO
R/W-0
MSTEN
R/W-0
MODE16
R/W-0
SPRE2
R/W-0
SMP
R/W-0
SPRE1
R/W-0
CKE
bit 8
R/W-0
SPRE0
R/W-0
PPRE1
R/W-0
PPRE0
bit 0
bit 15-13 Unimplemented: Read as ‘0’
bit 12
DISSCK: Disable SCKx pin bit (SPI Master modes only)
1 = Internal SPI clock is disabled, pin functions as I/O
0 = Internal SPI clock is enabled
bit 11
DISSDO: Disable SDOx pin bit
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 sampled at end of data output time
0 = Input data sampled at 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
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)
Note:
bit 7
bit 6
bit 5
bit 4-2
bit 1-0
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).
SSEN: Slave Select Enable (Slave mode) bit
1 = SSx pin used for Slave mode
0 = SSx pin not used by module. Pin controlled by port function.
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
MSTEN: Master Mode Enable bit
1 = Master mode
0 = Slave mode
SPRE2:SPRE0: Secondary Prescale (Master mode) bits
111 = Secondary prescale 1:1
110 = Secondary prescale 2:1
...
000 = Secondary prescale 8:1
PPRE1:PPRE0: Primary Prescale (Master mode) bits
11 = Primary prescale 1:1
10 = Primary prescale 4:1
01 = Primary prescale 16:1
00 = Primary prescale 64:1
Legend:
R = Readable bit
-n = Value at POR
DS39747C-page 118
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 14-3:
SPIxCON2: SPIx CONTROL REGISTER 2
Upper Byte:
R/W-0
R/W-0
FRMEN
SPIFSD
bit 15
R/W-0
SPIFPOL
Lower Byte:
U-0
—
bit 7
bit 15
bit 14
bit 13
bit 12-2
bit 1
bit 0
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
bit 8
U-0
—
R/W-0
SPIFE
R/W-0
SPIBEN
bit 0
FRMEN: Framed SPIx Support bit
1 = Framed SPIx support enabled
0 = Framed SPIx support disabled
SPIFSD: Frame Sync Pulse Direction Control on SSx pin bit
1 = Frame sync pulse input (slave)
0 = Frame sync pulse output (master)
SPIFPOL: Frame Sync Pulse Polarity bit (Frame mode only)
1 = Frame sync pulse is active-high
0 = Frame sync pulse is active-low
Unimplemented: Read as ‘0’
SPIFE: Frame Sync Pulse Edge Select bit
1 = Frame sync pulse coincides with first bit clock
0 = Frame sync pulse precedes first bit clock
SPIBEN: Enhanced Buffer Enable bit
1 = Enhanced Buffer enabled
0 = Enhanced Buffer disabled (legacy mode)
Legend:
R = Readable bit
-n = Value at POR
© 2006 Microchip Technology Inc.
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Preliminary
DS39747C-page 119
PIC24FJ128GA FAMILY
FIGURE 14-2:
SPI MASTER/SLAVE CONNECTION (STANDARD MODE)
PROCESSOR 1 (SPI Master)
PROCESSOR 2 (SPI Slave)
SDOx
SDIx
Serial Receive Buffer
(SPIxRXB)
Serial Receive Buffer
(SPIxRXB)
SDIx
Shift Register
(SPIxSR)
SDOx
LSb
MSb
MSb
Serial Transmit Buffer
(SPIxTXB)
LSb
Serial Transmit Buffer
(SPIxTXB)
Serial Clock
SCKx
SPIx Buffer
(SPIxBUF)
Shift Register
(SPIxSR)
SCKx
SPIx Buffer
(SPIxBUF)
SSx
(SSEN (SPIxCON1<7>) = 1 and MSTEN (SPIxCON1<5>) = 0)
(MSTEN (SPIxCON1<5> = 1))
Note
1:
2:
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.
FIGURE 14-3:
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)
SCKx
Serial Clock
SCKx
SPIx Buffer
(SPIxBUF)
SSx
SSEN (SPIxCON1<7>) = 1 and
MSTEN (SPIxCON1<5>) = 0 and
SPIBEN (SPIxCON2<0>) = 1
MSTEN (SPIxCON1<5> = 1 and
SPIBEN (SPIxCON2<0>) = 1
1:
2:
LSb
8-level FIFO Buffer
SSx
Note
Shift Register
(SPIxSR)
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.
DS39747C-page 120
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
FIGURE 14-4:
SPI MASTER, FRAME MASTER CONNECTION DIAGRAM
PROCESSOR 2
PIC24
(SPI Slave, Frame Slave)
SDIx
SDOx
SDOx
SDIx
Serial Clock
SCKx
SCKx
SSx
SSx
Frame Sync
Pulse
FIGURE 14-5:
SPI MASTER, FRAME SLAVE CONNECTION DIAGRAM
PROCESSOR 2
PIC24
SPI Master, Frame Slave)
SDOx
SDIx
SDIx
SDOx
SCKx
Serial Clock
SCKx
SSx
SSx
Frame Sync
Pulse
FIGURE 14-6:
SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM
PROCESSOR 2
PIC24
(SPI Slave, Frame Slave)
SDOx
SDIx
SDIx
SDOx
Serial Clock
SCKx
SCKx
SSx
SSx
Frame Sync.
Pulse
FIGURE 14-7:
SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM
PROCESSOR 2
PIC24
(SPI Master, Frame Slave)
SDIx
SDOx
SDOx
SDIx
Serial Clock
SCKx
SCKx
SSx
SSx
Frame Sync
Pulse
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 121
PIC24FJ128GA FAMILY
EQUATION 14-1:
RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED(1)
FCY
FSCK =
Primary Prescaler * Secondary Prescaler
Note 1: Based on TCY = FOSC/2, Doze mode and PLL are disabled.
TABLE 14-1:
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
16000
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
4:1
1250
625
313
208
156
16:1
313
156
78
52
39
64:1
78
39
20
13
10
FCY = 5 MHz
Primary Prescaler Settings
Note 1:
2:
Based on TCY = FOSC/2, Doze mode and PLL are disabled.
SCKx frequencies shown in kHz.
DS39747C-page 122
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
15.0
Note:
INTER-INTEGRATED CIRCUIT
(I2C™)
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
15.1
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:
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.
1.
2.
The I2C module supports these features:
4.
•
•
•
•
•
•
•
•
•
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
A block diagram of the module is shown in Figure 15-1.
3.
5.
6.
7.
8.
9.
10.
11.
12.
13.
© 2006 Microchip Technology Inc.
Communicating as a Master in a
Single Master Environment
Preliminary
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.
DS39747C-page 123
PIC24FJ128GA FAMILY
FIGURE 15-1:
I2C™ BLOCK DIAGRAM
Internal
Data Bus
I2CxRCV
Read
SCLx
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
Write
BRG Down Counter
I2CxBRG
Read
TCY/2
DS39747C-page 124
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
15.2
Setting Baud Rate When
Operating as a Bus Master
15.3
The I2CxMSK register (Register 15-3) designates
address bit positions as “don’t care” for both 7-bit and
10-bit Address 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 ‘1’. For example, when I2CxMSK is set
to ‘00100000’, the slave module will detect both
addresses ‘0000000’ and ‘00100000’.
To compute the Baud Rate Generator reload value, use
the following equation:
EQUATION 15-1:(1)
FCY
FSCL = --------------------------------------------2 ⋅ ( I2CxBRG + 1 )
or
To enable address masking, the IPMI (Intelligent
Peripheral Management Interface) must be disabled by
clearing the IPMIEN bit (I2CxCON<11>).
FCY
I2CxBRG = ⎛⎝ -------------------⎞⎠ – 1
2 ⋅ FSCL
Note 1: Based on TCY = FOSC/2, Doze mode and
PLL are disabled.
TABLE 15-1:
Slave Address Masking
I2C™ CLOCK RATES(1)
Required
System
FSCL
FCY
I2CxBRG Value
100 kHz
(Decimal)
(Hexadecimal)
Actual
FSCL
16 MHz
79
4F
100 kHz
100 kHz
8 MHz
39
27
100 kHz
100 kHz
4 MHz
19
13
100 kHz
400 kHz
16 MHz
19
13
400 kHz
400 kHz
8 MHz
9
9
400 kHz
400 kHz
4 MHz
4
4
400 kHz
400 kHz
2 MHz
2
2
333 kHz(2)
1 MHz
16 MHz
7
7
1 MHz
1 MHz
8 MHz
3
3
1 MHz(3)
1 MHz
4 MHz
1
1
1 MHz(4)
Legend:
Note 1:
2:
3:
4:
Shaded rows represent invalid reload values for a given FSCL and FCY.
Based on TCY = FOSC/2, Doze mode and PLL are disabled.
This is closest value to 400 kHz for this value of FCY.
FCY = 2 MHz is the minimum input clock frequency to have FSCL = 1 MHz.
I2CxBRG cannot have a value of less than 2.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 125
PIC24FJ128GA FAMILY
REGISTER 15-1:
Upper Byte:
R/W-0
I2CEN
bit 15
U-0
—
I2CxCON: I2Cx CONTROL REGISTER
R/W-0
I2CSIDL
R/W-1 HC
SCLREL
Lower Byte:
R/W-0
R/W-0
GCEN
STREN
bit 7
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
bit 7
R/W-0
IPMIEN
R/W-0
ACKDT
R/W-0
A10M
R/W-0
DISSLW
R/W-0
SMEN
bit 8
R/W-0 HC R/W-0 HC R/W-0 HC R/W-0 HC R/W-0 HC
ACKEN
RCEN
PEN
RSEN
SEN
bit 0
I2CEN: I2Cx Enable bit
1 = Enables the I2Cx module and configures the SDAx and SCLx pins as serial port pins
0 = Disables I2Cx module. All I2C pins are controlled by port functions.
Unimplemented: Read as ‘0’
I2CSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters an Idle mode
0 = Continue module operation in Idle mode
SCLREL: SCLx Release Control bit (when operating as I2C Slave)
1 = Release SCLx clock
0 = Hold 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.
IPMIEN: Intelligent Peripheral Management Interface (IPMI) Enable bit
1 = IPMI Support mode is enabled; all addresses Acknowledged
0 = IPMI mode disabled
A10M: 10-bit Slave Address bit
1 = I2CxADD is a 10-bit slave address
0 = I2CxADD is a 7-bit slave address
DISSLW: Disable Slew Rate Control bit
1 = Slew rate control disabled
0 = Slew rate control enabled
SMEN: SMBus Input Levels bit
1 = Enable I/O pin thresholds compliant with SMBus specification
0 = Disable SMBus input thresholds
GCEN: General Call Enable bit (when operating as I2C slave)
1 = Enable interrupt when a general call address is received in the I2CRSR
(module is enabled for reception)
0 = General call address disabled
.
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HS = Set in Hardware
HC = Cleared in Hardware
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
DS39747C-page 126
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 15-1:
Upper Byte:
R/W-0
I2CEN
bit 15
U-0
—
I2CxCON: I2Cx CONTROL REGISTER (CONTINUED)
R/W-0
I2CSIDL
R/W-1 HC
SCLREL
Lower Byte:
R/W-0
R/W-0
GCEN
STREN
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W-0
IPMIEN
R/W-0
ACKDT
R/W-0
A10M
R/W-0
DISSLW
R/W-0
SMEN
bit 8
R/W-0 HC R/W-0 HC R/W-0 HC R/W-0 HC R/W-0 HC
ACKEN
RCEN
PEN
RSEN
SEN
bit 0
STREN: SCLx Clock Stretch Enable bit (when operating as I2C slave)
Used in conjunction with SCLREL bit.
1 = Enable software or receive clock stretching
0 = Disable software or receive clock stretching
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 = Send NACK during Acknowledge
0 = Send ACK during Acknowledge
ACKEN: Acknowledge Sequence Enable bit
(When operating as I2C master. Applicable during master receive.)
1 = Initiate Acknowledge sequence on SDAx and SCLx pins and transmit ACKDT data bit
Hardware clear at end of master Acknowledge sequence.
0 = Acknowledge sequence not in progress
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 not in progress
PEN: Stop Condition Enable bit (when operating as I2C master)
1 = Initiate Stop condition on SDAx and SCLx pins
Hardware clear at end of master Stop sequence.
0 = Stop condition not in progress
RSEN: Repeated Start Condition Enabled bit (when operating as I2C master)
1 = Initiate Repeated Start condition on SDAx and SCLx pins
Hardware clear at end of master Repeated Start sequence.
0 = Repeated Start condition not in progress
SEN: Start Condition Enabled bit (when operating as I2C master)
1 = Initiate Start condition on SDA and SCL pins
Hardware clear at end of master Start sequence.
0 = Start condition not in progress
.
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HS = Set in Hardware
HC = Cleared in Hardware
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 127
PIC24FJ128GA FAMILY
REGISTER 15-2:
I2CxSTAT: I2Cx STATUS REGISTER
Upper Byte:
R-0 HSC
R-0 HSC
ACKSTAT TRSTAT
bit 15
U-0
—
U-0
—
Lower Byte:
R/C-0 HS R/C-0 HS
IWCOL
bit 7
I2COV
U-0
—
R-0 HSC
D/A
R/C-0 HS
BCL
R-0 HSC
GCSTAT
R/C-0 HSC R/C-0 HSC
P
R-0 HSC
ADD10
bit 8
R-0 HSC
R-0 HSC
R/W
RBF
S
bit 15
ACKSTAT: Acknowledge Status bit
(When operating as I2C master. Applicable to master transmit operation.)
1 = NACK received from slave
0 = ACK received from slave
Hardware set or clear at end of slave 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 beginning of master transmission.
Hardware clear at end of slave Acknowledge.
R-0 HSC
TBF
bit 0
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 address matches 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 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 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 is still holding the previous byte
0 = No overflow
Hardware set at attempt to transfer I2CRSR to I2CxRCV (cleared by software).
.
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
C = Clearable bit
HS = Set in Hardware
HSC = Hardware Set/Cleared
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
DS39747C-page 128
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 15-2:
I2CxSTAT: I2Cx STATUS REGISTER (CONTINUED)
Upper Byte:
R-0 HSC
R-0 HSC
ACKSTAT TRSTAT
bit 15
U-0
—
U-0
—
Lower Byte:
R/C-0 HS R/C-0 HS
IWCOL
bit 7
I2COV
U-0
—
R-0 HSC
D/A
R/C-0 HS
BCL
R-0 HSC
GCSTAT
R/C-0 HSC R/C-0 HSC
P
S
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 device address
Hardware clear at device address match.
Hardware set by write to I2CxTRN or by reception of slave byte.
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 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 detected.
bit 2
R/W: Read/Write bit Information (when operating as I2C slave)
1 = Read – indicates data transfer is output from slave
0 = Write – indicates data transfer is input to slave
Hardware set or clear after reception of I 2C device address byte.
bit 1
RBF: Receive Buffer Full Status bit
1 = Receive complete, I2CxRCV is full
0 = Receive not complete, I2CxRCV is empty
Hardware set when I2CxRCV written with received byte.
Hardware clear when software reads I2CxRCV.
bit 0
TBF: Transmit Buffer Full Status bit
1 = Transmit in progress, I2CxTRN is full
0 = Transmit complete, I2CxTRN is empty
Hardware set when software writes I2CxTRN.
Hardware clear at completion of data transmission.
R-0 HSC
ADD10
bit 8
R-0 HSC
R-0 HSC
R/W
RBF
R-0 HSC
TBF
bit 0
.
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
C = Clearable bit
HS = Set in Hardware
HSC = Hardware Set/Cleared
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 129
PIC24FJ128GA FAMILY
REGISTER 15-3:
Upper Byte:
U-0
—
bit 15
I2CxMSK: I2Cx SLAVE MODE ADDRESS MASK REGISTER
U-0
—
U-0
—
Lower Byte:
R/W-0
R/W-0
AMSK7
AMSK6
bit 7
U-0
—
U-0
—
U-0
—
R/W-0
AMSK5
R/W-0
AMSK4
R/W-0
AMSK3
R/W-0
AMSK9
R/W-0
AMSK8
bit 8
R/W-0
AMSK2
R/W-0
AMSK1
R/W-0
AMSK0
bit 0
bit 15-10 Unimplemented: Read as ‘0’
bit 9-0
AMSKx: Mask for Address Bit x Select bit
1 = Enable masking for bit x of incoming message address; bit match not required in this position
0 = Disable masking for bit x; bit match required in this position
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
DS39747C-page 130
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
16.0
Note:
UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
The Universal Asynchronous Receiver Transmitter
(UART) module is one of the serial I/O modules
available in the PIC24 device family. The UART is a fullduplex asynchronous system that can communicate
with peripheral devices, such as personal computers,
LIN, 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 16-1:
• 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 16-1. 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®
BCLKx
Hardware Flow Control
UxRTS
UxCTS
© 2006 Microchip Technology Inc.
UARTx Receiver
UxRX
UARTx Transmitter
UxTX
Preliminary
DS39747C-page 131
PIC24FJ128GA FAMILY
16.1
UART Baud Rate Generator (BRG)
The UART module includes a dedicated 16-bit Baud
Rate Generator. The BRGx register controls the period
of a free-running 16-bit timer. Equation 16-1 shows the
formula for computation of the baud rate with
BRGH = 0.
EQUATION 16-1:
Equation 16-2 shows the formula for computation of
the baud rate with BRGH = 1.
EQUATION 16-2:
UART BAUD RATE WITH
BRGH = 0(1,2)
Baud Rate =
Note 1: FCY denotes the instruction cycle clock
frequency (FOSC/2).
2: Based on TCY = FOSC/2, Doze mode
and PLL are disabled.
Example 16-1 shows the calculation of the baud rate
error for the following conditions:
UART BAUD RATE WITH
BRGH = 1(1,2)
Baud Rate =
FCY
4 • (BRGx + 1)
BRGx =
FCY
4 • Baud Rate
FCY
16 • (BRGx + 1)
FCY
–1
16 • Baud Rate
BRGx =
–1
Note 1: FCY denotes the instruction cycle clock
frequency.
2: Based on TCY = FOSC/2, Doze mode
and PLL are disabled.
The maximum baud rate (BRGH = 1) possible is FCY/4
(for BRGx = 0) and the minimum baud rate possible is
FCY/(4 * 65536).
Writing a new value to the BRGx 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.
• FCY = 4 MHz
• Desired Baud Rate = 9600
BAUD RATE ERROR CALCULATION (BRGH = 0)(1)
EXAMPLE 16-1:
Desired Baud Rate
The maximum baud rate (BRGH = 0) possible is
FCY/16 (for BRGx = 0), and the minimum baud rate
possible is FCY/(16 * 65536).
= FCY/(16 (BRGx + 1))
Solving for BRGx value:
BRGx
BRGx
BRGx
= ((FCY/Desired Baud Rate)/16) – 1
= ((4000000/9600)/16) – 1
= 25
Calculated Baud Rate = 4000000/(16 (25 + 1))
= 9615
Error
= (Calculated Baud Rate – Desired Baud Rate)
Desired Baud Rate
= (9615 – 9600)/9600
= 0.16%
Note 1: Based on TCY = FOSC/2, Doze mode and PLL are disabled.
DS39747C-page 132
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
16.2
1.
2.
3.
4.
5.
6.
2.
3.
4.
5.
6.
16.5
Set up the UART:
a) Write appropriate values for data, parity and
Stop bits.
b) Write appropriate baud rate value to the
BRGx register.
c) Set up transmit and receive interrupt enable
and priority bits.
Enable the UART.
Set the UTXEN bit (causes a transmit interrupt).
Write data byte to lower byte of TXxREG word.
The value will be immediately transferred to the
Transmit Shift Register (TSR), and the serial bit
stream will start shifting out with 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.
16.3
1.
Transmitting in 8-Bit Data Mode
Transmitting in 9-Bit Data Mode
Set up the UART (as described in Section 16.2
“Transmitting in 8-Bit Data Mode”).
Enable the UART.
Set the UTXEN bit (causes a transmit interrupt).
Write TXxREG as a 16-bit value only.
A word write to TXxREG triggers the transfer of
the 9-bit data to the TSR. 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.
16.4
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 – sets up the Break
character,
Load the TXxREG with a dummy character to
initiate transmission (value is ignored).
Write ‘55h’ to TXxREG – loads Sync character
into the transmit FIFO.
After the Break has been sent, the UTXBRK bit
is reset by hardware. The Sync character now
transmits.
© 2006 Microchip Technology Inc.
1.
2.
3.
4.
5.
Receiving in 8-Bit or 9-Bit Data
Mode
Set up the UART (as described in Section 16.2
“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 RXxREG.
The act of reading the RXxREG character will move the
next character to the top of the receive FIFO, including
a new set of PERR and FERR values.
16.6
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
mode. 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.
16.7
Infrared Support
The UART module provides two types of infrared UART
support: one is the IrDA clock output to support external IrDA encoder and decoder device (legacy module
support) and the other is the full implementation of the
IrDA encoder and decoder.
16.8
External IrDA Support – IrDA
Clock Output
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. With
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.
16.9
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.
Preliminary
DS39747C-page 133
PIC24FJ128GA FAMILY
REGISTER 16-1:
Upper Byte:
R/W-0
UARTEN
bit 15
U-0
—
UxMODE: UARTx MODE REGISTER
R/W-0
USIDL
R/W-0
IREN
Lower Byte:
R/W-0 HC
R/W-0
WAKE
LPBACK
bit 7
R/W-0
RTSMD
R/W-0 HC
ABAUD
R/W-0(1)
UEN1
U-0
—
R/W-0
RXINV
R/W-0
BRGH
R/W-0(1)
UEN0
bit 8
R/W-0
PDSEL1
R/W-0
PDSEL0
R/W-0
STSEL
bit 0
bit 15
UARTEN: UARTx Enable bit
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 minimal
bit 14
Unimplemented: Read as ‘0’
bit 13
USIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12
IREN: IrDA Encoder and Decoder Enable bit
1 = IrDA encoder and decoder enabled
0 = IrDA encoder and decoder disabled
bit 11
RTSMD: Mode Selection for UxRTS Pin bit
1 = UxRTS pin in Simplex mode
0 = UxRTS pin in Flow Control mode
bit 10
Unimplemented: Read as ‘0’
bit 9-8
UEN1:UEN0: UARTx Enable bits
11 = UxTX, UxRX and BCLKx pins are enabled and used; UxCTS pin 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 controlled by PORT latches
00 = UxTX and UxRX pins are enabled and used; UxCTS and UxRTS/BCLKx pins controlled by PORT latches
Note: This feature is only available for the 16x BRG mode (BRGH = 0).
Note 1: Bit availability depends on pin availability.
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 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 disabled or completed
bit 4
RXINV: Receive Polarity Inversion bit
1 = UxRX Idle state is ‘0’
0 = UxRX Idle state is ‘1’
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HC = Hardware Cleared
HS = Hardware Set
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
DS39747C-page 134
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 16-1:
Upper Byte:
R/W-0
UARTEN
bit 15
U-0
—
UxMODE: UARTx MODE REGISTER (CONTINUED)
R/W-0
USIDL
R/W-0
IREN
Lower Byte:
R/W-0 HC
R/W-0
WAKE
LPBACK
bit 7
R/W-0
RTSMD
R/W-0 HC
ABAUD
R/W-0(1)
UEN1
U-0
—
R/W-0
RXINV
R/W-0
BRGH
R/W-0(1)
UEN0
bit 8
R/W-0
PDSEL1
bit 3
BRGH: High Baud Rate Enable bit
1 = BRG generates 4 clocks per bit period (4x Baud Clock, High-Speed mode)
0 = BRG generates 16 clocks per bit period (16x Baud Clock, Standard mode)
bit 2-1
PDSEL1:PDSEL0: 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
Legend:
R/W-0
PDSEL0
R/W-0
STSEL
bit 0
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HC = Hardware Cleared
HS = Hardware Set
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 135
PIC24FJ128GA FAMILY
REGISTER 16-2:
UxSTA: UARTx STATUS AND CONTROL REGISTER
Upper Byte:
R/W-0
R/W-0
R/W-0
UTXISEL1 UTXINV(1) UTXISEL0
bit 15
U-0
—
Lower Byte:
R/W-0
R/W-0
URXISEL1 URXISEL0
bit 7
R/W-0 HC
UTXBRK
R/W-0
ADDEN
R/W-0
UTXEN
R-1
RIDLE
R-0
UTXBF
R-0
PERR
R-1
TRMT
bit 8
R-0
FERR
R/C-0
OERR
R-0
URXDA
bit 0
bit 15,13 UTXISEL1:UTXISEL0: Transmission Interrupt Mode Selection bits
11 = Reserved; do not use
10 = Interrupt when a character is transferred to the Transmit Shift Register 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)
1 = IrDA encoded UxTX idle state is ‘1’
0 = IrDA encoded UxTX idle state is ‘0’
Note 1: Value of bit only affects the transmit properties of the module when the IrDA encoder is enabled
(IREN = 1).
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 disabled or completed
bit 10
UTXEN: Transmit Enable bit
1 = Transmit enabled, UxTX pin controlled by UARTx
0 = Transmit disabled, any pending transmission is aborted and buffer is reset. UxTX pin 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
URXISEL1:URXISEL0: 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.
bit 5
ADDEN: Address Character Detect bit (bit 8 of received data = 1)
1 = Address Detect mode enabled. If 9-bit mode is not selected, this does not take effect.
0 = Address Detect mode disabled
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HS = Hardware Set
HC = Hardware Cleared
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
DS39747C-page 136
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 16-2:
UxSTA: UARTx STATUS AND CONTROL REGISTER (CONTINUED)
Upper Byte:
R/W-0
R/W-0
R/W-0
UTXISEL1 UTXINV(1) UTXISEL0
bit 15
U-0
—
Lower Byte:
R/W-0
R/W-0
URXISEL1 URXISEL0
bit 7
R/W-0 HC
UTXBRK
R/W-0
ADDEN
R/W-0
UTXEN
R-1
RIDLE
R-0
UTXBF
R-0
PERR
R-1
TRMT
bit 8
R-0
FERR
R/C-0
OERR
R-0
URXDA
bit 0
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 (Read/Clear-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
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
HS = Hardware Set
HC = Hardware Cleared
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 137
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 138
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
17.0
Note:
PARALLEL MASTER PORT
Key features of the PMP module include:
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
The Parallel Master Port module (PMP) is a parallel
8-bit I/O module, specifically designed to communicate
with a wide variety of parallel devices, such as communications peripherals, LCDs, external memory devices
and microcontrollers. Because the interface to parallel
peripherals varies significantly, the PMP is highly
configurable.
FIGURE 17-1:
• Up to 16 Programmable Address Lines
• Up to Two Chip Select Lines
• 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
PMP MODULE OVERVIEW
Address Bus
Data Bus
Control Lines
PIC24F
Parallel Master Port
PMA<0>
PMALL
PMA<1>
PMALH
Up to 16-bit Address
EEPROM
PMA<13:2>
PMA<14>
PMCS1
PMA<15>
PMCS2
PMBE
PMRD
PMRD/PMWR
Microcontroller
LCD
FIFO
Buffer
PMWR
PMENB
PMD<7:0>
PMA<7:0>
PMA<15:8>
© 2006 Microchip Technology Inc.
Preliminary
8-bit Data
DS39747C-page 139
PIC24FJ128GA FAMILY
REGISTER 17-1:
Upper Byte:
R/W-0
PMPEN
bit 15
U-0
—
PMCON: PARALLEL PORT CONTROL REGISTER
R/W-0
PSIDL
R/W-0
R/W-0
ADRMUX1 ADRMUX0
Lower Byte:
R/W-0
R/W-0
CSF1
CSF0
bit 7
R/W-0(1)
ALP
R/W-0
PTBEEN
R/W-0(1)
CS2P
R/W-0
PTWREN
R/W-0(1)
CS1P
bit 15
PMPEN: Parallel Master Port Enable bit
1 = PMP enabled
0 = PMP 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
R/W-0
PTRDEN
bit 8
R/W-0
BEP
R/W-0
WRSP
R/W-0
RDSP
bit 0
bit 12-11 ADRMUX1:ADRMUX0: Address/Data Multiplexing Selection bits
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 8 bits are on PMA<15:8>
00 = Address and data appear on separate pins
bit 10
PTBEEN: Byte Enable Port Enable bit (16-bit Master mode)
1 = PMBE port enabled
0 = PMBE port disabled
bit 9
PTWREN: Write Enable Strobe Port Enable bit
1 = PMWR/PMENB port enabled
0 = PMWR/PMENB port disabled
bit 8
PTRDEN: Read/Write Strobe Port Enable bit
1 = PMRD/PMWR port enabled
0 = PMRD/PMWR port disabled
bit 7-6
CSF1:CSF0: Chip Select Function bits
11 = Reserved
10 = PMCS1 and PMCS2 function as chip select
01 = PMCS2 functions as chip select, PMCS1 functions as address bit 14
00 = PMCS1 and PMCS2 function as address bits 15 and 14
bit 5
ALP: Address Latch Polarity bit(1)
1 = Active-high (PMALL and PMALH)
0 = Active-low (PMALL and PMALH)
Note 1: These bits have no effect when their corresponding pins are used as address lines.
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
DS39747C-page 140
Preliminary
x = bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 17-1:
Upper Byte:
R/W-0
PMPEN
bit 15
U-0
—
PMCON: PARALLEL PORT CONTROL REGISTER (CONTINUED)
R/W-0
PSIDL
R/W-0
R/W-0
ADRMUX1 ADRMUX0
Lower Byte:
R/W-0
R/W-0
CSF1
CSF0
bit 7
R/W-0(1)
ALP
R/W-0
PTBEEN
R/W-0(1)
CS2P
R/W-0
PTWREN
R/W-0(1)
CS1P
bit 4
CS2P: Chip Select 2 Polarity bit(1)
1 = Active-high (PMCS2)
0 = Active-low (PMCS2)
bit 3
CS1P: Chip Select 1 Polarity bit(1)
1 = Active-high (PMCS1/PMCS)
0 = Active-low (PMCS1/PMCS)
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)
R/W-0
PTRDEN
bit 8
R/W-0
BEP
R/W-0
WRSP
R/W-0
RDSP
bit 0
Note 1: These bits have no effect when their corresponding pins are used as address lines.
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
© 2006 Microchip Technology Inc.
Preliminary
x = bit is unknown
DS39747C-page 141
PIC24FJ128GA FAMILY
REGISTER 17-2:
Upper Byte:
R-0
R/W-0
BUSY
IRQM1
bit 15
PMMODE: PARALLEL PORT MODE REGISTER
R/W-0
IRQM0
R/W-0
INCM1
Lower Byte:
R/W-0
R/W-0
WAITB1(1) WAITB0(1)
bit 7
bit 15
R/W-0
INCM0
R/W-0
WAITM3
R/W-0
MODE16
R/W-0
WAITM2
R/W-0
MODE1
R/W-0
WAITM1
R/W-0
MODE0
bit 8
R/W-0
WAITM0
R/W-0
R/W-0
WAITE1(1) WAITE0(1)
bit 0
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 IRQM1:IRQM0: 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 generated, processor stall activated
01 = Interrupt generated at the end of the read/write cycle
00 = No interrupt generated
bit 12-11 INCM1:INCM0: Increment Mode bits
11 = PSP read and write buffers auto-increment (Legacy PSP mode only)
10 = Decrement ADDR<15,13:0> by 1 every read/write cycle
01 = Increment ADDR<15,13:0> 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
MODE1:MODE0: Parallel Port Mode Select bits
11 = Master mode 1 (PMCSx, PMRD/PMWR, PMENB, PMBE, PMA<x:0> and PMD<7:0>)
10 = Master mode 2 (PMCSx, PMRD, PMWR, PMBE, PMA<x:0> and PMD<7:0>)
01 = Enhanced PSP, control signals (PMRD, PMWR, PMCS, PMD<7:0> and PMA<1:0>)
00 = Legacy Parallel Slave Port, control signals (PMRD, PMWR, PMCS and PMD<7:0>)
bit 7-6
WAITB1:WAITB0: 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
WAITM3:WAITM0: 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
WAITE1:WAITE0: 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 WAITM3:WAITM0 = 0000.
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
DS39747C-page 142
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 17-3:
Upper Byte:
R/W-0
CS2
bit 15
PMADDR: PARALLEL PORT ADDRESS REGISTER
R/W-0
CS1
R/W-0
R/W-0
R/W-0
R/W-0
ADDR<13:8>
R/W-0
R/W-0
bit 8
Lower Byte:
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ADDR<7:0>
R/W-0
R/W-0
R/W-0
bit 7
bit 0
bit 15
CS2: Chip Select 2 bit
1 = Chip select 2 is active
0 = Chip select 2 is inactive (pin functions as PMA<15>)
bit 14
CS1: Chip Select 1 bit
1 = Chip select 1 is active
0 = Chip select 1 is inactive (pin functions as PMA<14>)
bit 13-0
ADDR13:ADDR0: Parallel Port Destination Address bits
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
REGISTER 17-4:
x = Bit is unknown
PMPEN: PARALLEL PORT ENABLE REGISTER
Upper Byte:
R/W-0
R/W-0
PTEN15
PTEN14
bit 15
R/W-0
PTEN13
R/W-0
PTEN12
Lower Byte:
R/W-0
R/W-0
PTEN7
PTEN6
bit 7
R/W-0
PTEN11
R/W-0
PTEN5
R/W-0
PTEN10
R/W-0
PTEN4
R/W-0
PTEN9
R/W-0
PTEN3
R/W-0
PTEN8
bit 8
R/W-0
PTEN2
R/W-0
PTEN1
R/W-0
PTEN0
bit 0
bit 15-14 PTEN15:PTEN14: PMCSx Strobe Enable bits
1 = PMA15 and PMA14 function as either PMA<15:14> or PMCS2 and PMCS1
0 = PMA15 and PMA14 function as port I/O
bit 13-2
PTEN13:PTEN2: PMP Address Port Enable bits
1 = PMA<13:2> function as PMP address lines
0 = PMA<13:2> function as port I/O
bit 1-0
PTEN1:PTEN0: PMALH/PMALL Strobe Enable bits
1 = PMA1 and PMA0 function as either PMA<1:0> or PMALH and PMALL
0 = PMA1 and PMA0 pads functions as port I/O
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 143
PIC24FJ128GA FAMILY
REGISTER 17-5:
PMSTAT: PARALLEL PORT STATUS REGISTER
Upper Byte:
R-0
R/W-0 HS
IBF
IBOV
bit 15
U-0
—
U-0
—
Lower Byte:
R-1
R/W-0 HS
OBE
OBUF
bit 7
R-0
IB3F
U-0
—
R-0
IB2F
U-0
—
R-0
IB1F
R-1
OB3E
R-0
IB0F
bit 8
R-1
OB2E
R-1
OB1E
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
R-1
OB0E
bit 0
bit 13-12 Unimplemented: Read as ‘0’
bit 11-8
IBnF: Input Buffer n Status Full bit
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 bit
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
OBnE: Output Buffer n Status Empty bit
1 = Output buffer is empty (writing data to the buffer will clear this bit)
0 = Output buffer contains data that has not been transmitted
Legend:
HS = Hardware Set
HC = Hardware Cleared
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
DS39747C-page 144
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 17-6:
Upper Byte:
U-0
—
bit 15
PADCFG1: PAD CONFIGURATION CONTROL REGISTER
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
bit 15-2
Unimplemented: Read as ‘0’
bit 1
RTSECSEL: RTCC Seconds Clock Output Select bit
1 = RTCC Seconds Clock is selected for the RTCC pin
0 = RTCC Alarm Pulse is selected for the RTCC pin
Note:
bit 0
U-0
—
U-0
—
bit 8
U-0
—
R/W-0
RTSECSEL
R/W-0
PMPTTL
bit 0
To enable the actual RTCC output, the RTCCFG (RTCOE) bit needs to be set.
PMPTTL: PMP Module TTL Input Buffer Select bit
1 = PMP module uses TTL input buffers
0 = PMP module uses Schmitt input buffers
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 145
PIC24FJ128GA FAMILY
FIGURE 17-2:
LEGACY PARALLEL SLAVE PORT EXAMPLE
Master
PIC24F Slave
Address Bus
Data Bus
PMD<7:0>
FIGURE 17-3:
PMD<7:0>
PMCS
PMCS
PMRD
PMRD
PMWR
PMWR
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)
PMCS
PMCS
PMDOUT1H (1)
PMDIN1H (1)
PMRD
PMRD
PMDOUT2L (2)
PMDIN2L (2)
PMWR
PMWR
PMDOUT2H (3)
PMDIN2H (3)
Address Bus
Data Bus
Control Lines
TABLE 17-1:
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 17-4:
MASTER MODE, DEMULTIPLEXED ADDRESSING (SEPARATE READ AND
WRITE STROBES, TWO CHIP SELECTS)
PIC24F
PMA<13:0>
PMD<7:0>
PMCS1
PMCS2
Address Bus
DS39747C-page 146
PMRD
Data Bus
PMWR
Control Lines
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
FIGURE 17-5:
MASTER MODE, PARTIALLY MULTIPLEXED ADDRESSING (SEPARATE READ
AND WRITE STROBES, TWO CHIP SELECTS)
PIC24F
PMA<13:8>
PMD<7:0>
PMA<7:0>
PMCS1
PMCS2
Address Bus
PMALL
Multiplexed
Data and
Address Bus
PMRD
Control Lines
PMWR
FIGURE 17-6:
MASTER MODE, FULLY MULTIPLEXED ADDRESSING (SEPARATE READ AND
WRITE STROBES, TWO CHIP SELECTS)
PMD<7:0>
PMA<13:8>
PIC24F
PMCS1
PMCS2
PMALL
PMALH
Multiplexed
Data and
Address Bus
PMRD
Control Lines
PMWR
FIGURE 17-7:
EXAMPLE OF A MULTIPLEXED ADDRESSING APPLICATION
PIC24F
PMD<7:0>
PMALL
373
A<7:0>
D<7:0>
373
A<15:8>
D<7:0>
CE
OE
PMALH
FIGURE 17-8:
A<15:0>
WR
PMCS
Address Bus
PMRD
Data Bus
PMWR
Control Lines
EXAMPLE OF A PARTIALLY MULTIPLEXED ADDRESSING APPLICATION
PIC24F
PMD<7:0>
373
PMALL
PMA<14:7>
A<7:0>
D<7:0>
A<14:8>
D<7:0>
CE
OE
PMCS
WR
Address Bus
Data Bus
PMRD
Control Lines
PMWR
© 2006 Microchip Technology Inc.
A<14:0>
Preliminary
DS39747C-page 147
PIC24FJ128GA FAMILY
FIGURE 17-9:
EXAMPLE OF AN 8-BIT MULTIPLEXED ADDRESS AND DATA APPLICATION
PIC24F
Parallel Peripheral
PMD<7:0>
PMALL
AD<7:0>
ALE
PMCS
CS
Address Bus
PMRD
RD
Data Bus
PMWR
WR
Control Lines
FIGURE 17-10:
PARALLEL EEPROM EXAMPLE (UP TO 15-BIT ADDRESS, 8-BIT DATA)
PIC24F
PMA<n:0>
Parallel EEPROM
A<n:0>
PMD<7:0>
D<7:0>
PMCS
CE
PMRD
OE
PMWR
WR
FIGURE 17-11:
Address Bus
Data Bus
Control Lines
PARALLEL EEPROM EXAMPLE (UP TO 15-BIT ADDRESS, 16-BIT DATA)
PIC24F
Parallel EEPROM
PMA<n:0>
A<n:1>
PMD<7:0>
D<7:0>
PMBE
A0
PMCS
CE
PMRD
OE
PMWR
WR
FIGURE 17-12:
Address Bus
Data Bus
Control Lines
LCD CONTROL EXAMPLE (BYTE MODE OPERATION)
PIC24F
PM<7:0>
PMA0
PMRD/PMWR
PMCS
LCD Controller
D<7:0>
RS
R/W
E
Address Bus
Data Bus
Control Lines
DS39747C-page 148
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
18.0
Note:
REAL-TIME CLOCK AND
CALENDAR
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
FIGURE 18-1:
RTCC BLOCK DIAGRAM
RTCC Clock Domain
32.768 kHz Input
from SOSC Oscillator
CPU Clock Domain
RCFGCAL
RTCC Prescalers
ALCFGRPT
YEAR
0.5s
Alarm
Event
MTHDAY
RTCVAL
RTCC Timer
WKDYHR
MINSEC
Comparator
ALMTHDY
Compare Registers
with Masks
ALRMVAL
ALWDHR
ALMINSEC
Repeat Counter
RTCC Interrupt
RTCC Interrupt Logic
Alarm Pulse
RTCC Pin
RTCOE
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 149
PIC24FJ128GA FAMILY
18.1
RTCC Module Registers
The RTCC module registers are organized into three
categories:
• RTCC Control Registers
• RTCC Value Registers
• Alarm Value Registers
18.1.1
REGISTER MAPPING
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 18-1).
By writing the RTCVALH byte, the RTCC pointer value
RTCPTR<1:0> decrements by one until it reaches ‘00’.
Once it reaches ‘00’, the MINUTES and SECONDS
value will be accessible through RTCVALH and
RTCVALL until the pointer value is manually changed.
TABLE 18-1:
RTCVAL REGISTER MAPPING
RTCC Value Register Window
RTCPTR
<1:0>
RTCVAL<15:8>
RTCVAL<7:0>
00
MINUTES
SECONDS
01
WEEKDAY
HOURS
10
MONTH
DAY
11
—
YEAR
DS39747C-page 150
The Alarm Value register window (ALRMVALH and
ALRMVALL)
uses
the
ALRMPTR
bits
(ALCFGRPT<9:8>) to select the desired alarm register
pair (see Table 18-2).
By writing the ALRMVALH byte, the alarm pointer value
ALRMPTR<1:0> decrements by one until it reaches
‘00’. Once it reaches ‘00’, the ALRMMIN and
ALRMSEC value will be accessible through
ALRMVALH and ALRMVALL until the pointer value is
manually changed.
TABLE 18-2:
ALRMPTR
<1:0>
ALRMVAL REGISTER
MAPPING
Alarm Value Register Window
ALRMVAL<15:8> ALRMVAL<7:0>
00
ALRMMIN
01
ALRMWD
ALRMSEC
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 will decrement the ALRMPTR<1:0>
value. The same applies to the RTCVALH or RTCVALL
bytes with the RTCPTR<1:0> being decremented.
Note:
Preliminary
This only applies to read operations and
not write operations.
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
18.1.2
RTCC CONTROL REGISTERS
RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER(1)
REGISTER 18-1:
Upper Byte:
R/W-0
RTCEN(2)
bit 15
U-0
—
R/W-0
R-0
R-0
RTCWREN RTCSYNC HALFSEC
Lower Byte:
R/W-0
R/W-0
CAL7
CAL6
bit 7
R/W-0
CAL5
R/W-0
RTCOE
R/W-0
CAL4
R/W-0
R/W-0
RTCPTR1 RTCPTR0
bit 8
R/W-0
CAL3
R/W-0
CAL2
R/W-0
CAL1
R/W-0
CAL0
bit 0
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
1 = Second half period of a second
0 = First half period of a second
Note:
bit 10
This bit is read-only. It is cleared to ‘0’ on a write to the lower half of the MINSEC register.
RTCOE: RTCC Output Enable bit
1 = RTCC output enabled
0 = RTCC output disabled
Note 1: The RCFGCAL register is only affected by a POR.
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 151
PIC24FJ128GA FAMILY
RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER(1)
(CONTINUED)
REGISTER 18-1:
Upper Byte:
R/W-0
RTCEN(2)
bit 15
U-0
—
R/W-0
R-0
R-0
RTCWREN RTCSYNC HALFSEC
Lower Byte:
R/W-0
R/W-0
CAL7
CAL6
bit 7
R/W-0
CAL5
R/W-0
RTCOE
R/W-0
CAL4
R/W-0
R/W-0
RTCPTR1 RTCPTR0
bit 8
R/W-0
CAL3
R/W-0
CAL2
R/W-0
CAL1
R/W-0
CAL0
bit 0
bit 9-8
RTCPTR1:RTCPTR0: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading 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
bit 7-0
CAL7:CAL0: 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
Note 1: The RCFGCAL register is only affected by a POR.
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
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
DS39747C-page 152
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 18-2:
Upper Byte:
U-0
—
bit 15
PADCFG1: PAD CONFIGURATION CONTROL REGISTER
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
bit 15-2
Unimplemented: Read as ‘0’
bit 1
RTSECSEL: RTCC Seconds Clock Output Select bit
1 = RTCC seconds clock is selected for the RTCC pin
0 = RTCC alarm pulse is selected for the RTCC pin
Note:
bit 0
U-0
—
U-0
—
bit 8
U-0
—
R/W-0
RTSECSEL
R/W-0
PMPTTL
bit 0
To enable the actual RTCC output, the RTCCFG (RTCOE) bit needs to be set.
PMPTTL: PMP Module TTL Input Buffer Select bit
1 = PMP module uses TTL input buffers
0 = PMP module uses Schmitt input buffers
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 153
PIC24FJ128GA FAMILY
REGISTER 18-3:
ALCFGRPT: ALARM CONFIGURATION REGISTER
Upper Byte:
R/W-0
R/W-0
ALRMEN
CHIME
bit 15
R/W-0
AMASK3
R/W-0
AMASK2
Lower Byte:
R/W-0
R/W-0
ARPT7
ARPT6
bit 7
R/W-0
AMASK1
R/W-0
ARPT5
R/W-0
R/W-0
R/W-0
AMASK0 ALRMPTR1 ALRMPTR0
bit 8
R/W-0
ARPT4
R/W-0
ARPT3
R/W-0
ARPT2
R/W-0
ARPT1
R/W-0
ARPT0
bit 0
bit 15
ALRMEN: Alarm Enable bit
1 = Alarm is enabled (cleared automatically after an alarm event whenever ARPT<7:0> = 00 and
CHIME = 0)
0 = Alarm is disabled
bit 14
CHIME: Chime Enable bit
1 = Chime is enabled; ARPT<7:0> is allowed to roll over from 00h to FFh
0 = Chime is disabled; ARPT<7:0> stops once it reaches 00h
bit 13-10 AMASK3:AMASK0: 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
bit 9-8
ALRMPTR1:ALRMPTR0: Alarm Value Register Window Pointer bits
Points to the corresponding Alarm Value registers when reading 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
bit 7-0
ARPT7:ARPT0: Alarm Repeat Counter Value bits
11111111 = Alarm will repeat 255 more times
...
00000000 = Alarm will not repeat
The counter decrements on any alarm event. The counter is prevented from rolling over from 00h to FFh
unless CHIME = 1.
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
DS39747C-page 154
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
18.1.3
RTCVAL REGISTER MAPPINGS
REGISTER 18-4:
Upper Byte:
U-0
—
bit 15
YEAR: YEAR VALUE REGISTER(1)
U-0
—
U-0
—
U-0
—
Lower Byte:
R/W-x
R/W-x
YRTEN3
YRTEN2
bit 7
bit 15-8
bit 7-4
bit 3-0
U-0
—
R/W-x
YRTEN1
U-0
—
R/W-x
YRTEN0
R/W-x
YRONE3
U-0
—
R/W-x
YRONE2
U-0
—
bit 8
R/W-x
YRONE1
R/W-x
YRONE0
bit 0
Unimplemented: Read as ‘0’
YRTEN3:YRTEN0: Binary Coded Decimal Value of Year’s Tens Digit; Contains a value from 0 to 9
YRONE3:YRONE0: Binary Coded Decimal Value of Year’s Ones Digit; Contains a value from 0 to 9
Note 1: A write to the YEAR register is only allowed when RTCWREN = 1.
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
REGISTER 18-5:
Upper Byte:
U-0
—
bit 15
MTHDY: MONTH AND DAY VALUE REGISTER(1)
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
bit 15-13
bit 12
bit 11-8
bit 7-6
bit 5-4
bit 3-0
x = Bit is unknown
R-x
R-x
R-x
R-x
R-x
MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 8
U-0
—
R/W-x
DAYTEN1
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 0
Unimplemented: Read as ‘0’
MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit; Contains a value of 0 or 1
MTHONE3:MTHONE0: Binary Coded Decimal Value of Month’s Ones Digit; Contains a value from 0 to 9
Unimplemented: Read as ‘0’
DAYTEN1:DAYTEN0: Binary Coded Decimal Value of Day’s Tens Digit; Contains a value from 0 to 3
DAYONE3:DAYONE0: Binary Coded Decimal Value of Day’s Ones Digit; Contains a value from 0 to 9
Note 1: A write to this register is only allowed when RTCWREN = 1.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 155
PIC24FJ128GA FAMILY
REGISTER 18-6:
Upper Byte:
U-0
—
bit 15
WKDYHR: WEEKDAY AND HOURS VALUE REGISTER(1)
U-0
—
U-0
—
Lower Byte:
U-0
—
bit 7
bit 15-11
bit 10-8
bit 7-6
bit 5-4
bit 3-0
U-0
—
U-0
—
U-0
—
R/W-x
HRTEN1
R/W-x
WDAY2
R/W-x
HRTEN0
R/W-x
WDAY1
R/W-x
HRONE3
R/W-x
WDAY0
bit 8
R/W-x
HRONE2
R/W-x
HRONE1
R/W-x
HRONE0
bit 0
Unimplemented: Read as ‘0’
WDAY2:WDAY0: Binary Coded Decimal Value of Weekday Digit; Contains a value from 0 to 6
Unimplemented: Read as ‘0’
HRTEN1:HRTEN0: Binary Coded Decimal Value of Hour’s Tens Digit; Contains a value from 0 to 2
HRONE3:HRONE0: Binary Coded Decimal Value of Hour’s Ones Digit; Contains a value from 0 to 9
Note 1: A write to this register is only allowed when RTCWREN = 1.
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
REGISTER 18-7:
x = Bit is unknown
MINSEC: MINUTES AND SECONDS VALUE REGISTER
Upper Byte:
U-0
R/W-x
—
MINTEN2
bit 15
R/W-x
MINTEN1
R/W-x
MINTEN0
R/W-x
R/W-x
R/W-x
R/W-x
MINONE3 MINONE2 MINONE1 MINONE0
bit 8
Lower Byte:
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
bit 15
bit 14-12
bit 11-8
bit 7
bit 6-4
bit 3-0
Unimplemented: Read as ‘0’
MINTEN2:MINTEN0: Binary Coded Decimal Value of Minute’s Tens Digit; Contains a value from 0 to 5
MINONE3:MINONE0: Binary Coded Decimal Value of Minute’s Ones Digit; Contains a value from 0 to 9
Unimplemented: Read as ‘0’
SECTEN2:SECTEN0: Binary Coded Decimal Value of Second’s Tens Digit; Contains a value from 0 to 5
SECONE3:SECONE0: Binary Coded Decimal Value of Second’s Ones Digit; Contains a value from 0 to 9
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
DS39747C-page 156
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
18.1.4
ALRMVAL REGISTER MAPPINGS
REGISTER 18-8:
Upper Byte:
U-0
—
bit 15
U-0
—
ALMTHDY: ALARM MONTH AND DAY VALUE REGISTER(1)
U-0
—
Lower Byte:
U-0
—
bit 7
bit 15-13
bit 12
bit 11-8
bit 7-6
bit 5-4
bit 3-0
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 8
U-0
—
R/W-x
DAYTEN1
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 0
Unimplemented: Read as ‘0’
MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit; Contains a value of 0 or 1
MTHONE3:MTHONE0: Binary Coded Decimal Value of Month’s Ones Digit; Contains a value from 0 to 9
Unimplemented: Read as ‘0’
DAYTEN1:DAYTEN0: Binary Coded Decimal Value of Day’s Tens Digit; Contains a value from 0 to 3
DAYONE3:DAYONE0: Binary Coded Decimal Value of Day’s Ones Digit; Contains a value from 0 to 9
Note 1: A write to this register is only allowed when RTCWREN = 1.
Legend:
R = Readable bit
-n = Value at POR
REGISTER 18-9:
Upper Byte:
U-0
—
bit 15
U-0
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
ALWDHR: ALARM WEEKDAY AND HOURS VALUE REGISTER(1)
U-0
—
Lower Byte:
U-0
—
bit 7
bit 15-11
bit 10-8
bit 7-6
bit 5-4
bit 3-0
W = Writable bit
‘1’ = Bit is set
U-0
—
U-0
—
U-0
—
R/W-x
HRTEN1
R/W-x
WDAY2
R/W-x
HRTEN0
R/W-x
WDAY1
R/W-x
HRONE3
R/W-x
WDAY0
bit 8
R/W-x
HRONE2
R/W-x
HRONE1
R/W-x
HRONE0
bit 0
Unimplemented: Read as ‘0’
WDAY2:WDAY0: Binary Coded Decimal Value of Weekday Digit; Contains a value from 0 to 6
Unimplemented: Read as ‘0’
HRTEN1:HRTEN0: Binary Coded Decimal Value of Hour’s Tens Digit; Contains a value from 0 to 2
HRONE3:HRONE0: Binary Coded Decimal Value of Hour’s Ones Digit; Contains a value from 0 to 9
Note 1: A write to this register is only allowed when RTCWREN = 1.
Legend:
R = Readable bit
-n = Value at POR
© 2006 Microchip Technology Inc.
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
Preliminary
DS39747C-page 157
PIC24FJ128GA FAMILY
REGISTER 18-10: ALMINSEC: ALARM MINUTES AND SECONDS VALUE REGISTER
Upper Byte:
U-0
R/W-x
—
MINTEN2
bit 15
R/W-x
MINTEN1
R/W-x
MINTEN0
R/W-x
MINONE3
R/W-x
MINONE2
R/W-x
MINONE1
R/W-x
MINONE0
bit 8
Lower Byte:
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
bit 15
bit 14-12
bit 11-8
bit 7
bit 6-4
bit 3-0
Unimplemented: Read as ‘0’
MINTEN2:MINTEN0: Binary Coded Decimal Value of Minute’s Tens Digit; Contains a value from 0 to 5
MINONE3:MINONE0: Binary Coded Decimal Value of Minute’s Ones Digit; Contains a value from 0 to 9
Unimplemented: Read as ‘0’
SECTEN2:SECTEN0: Binary Coded Decimal Value of Second’s Tens Digit; Contains a value from 0 to 5
SECONE3:SECONE0: Binary Coded Decimal Value of Second’s Ones Digit; Contains a value from 0 to 9
Legend:
R = Readable bit
-n = Value at POR
18.2
W = Writable bit
‘1’ = Bit is set
Calibration
3.
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 be either added or subtracted from
the RTCC timer, once every minute. Refer to the steps
below for RTCC calibration:
1.
2.
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.
Formula box:
(Ideal frequency (32,768) – measured frequency)
* 60 = clocks per minute
DS39747C-page 158
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
a) If the oscillator is faster then ideal (negative
result form step 2), the RCFGCAL register value
needs to 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 then ideal (positive
result from step 2) the RCFGCAL register value
needs to be positive. This causes the specified
number of clock pulses to be subtracted from
the timer counter once every minute.
4.
Load the RCFGCAL register with the correct
value.
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:
Preliminary
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.
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
18.3
Alarm
After each alarm is issued, the ALCFGRPT register is
decremented by one. Once the register has reached
‘00’, 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 ALCFGRPT register reaches ‘00’, it
will roll over to FF and continue counting indefinitely
when CHIME = 1.
• Configurable from half second to one year
• Enabled using the ALRMEN bit (ALCFGRPT<7>,
Register 18-3)
• One-time alarm and repeat alarm options
available
18.3.1
CONFIGURING THE ALARM
The alarm feature is enabled using the ALRMEN bit.
This bit is cleared when an alarm is issued. Writes to
ALRMVALH:ALRMVALL should only take place when
ALRMEN = 0.
18.3.2
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.
As shown in Figure 18-2, 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 lower half of the ALCFGRPT
register.
Note:
When ALCFGRPT = 00 and CHIME bit = 0
(ALCFGRPT<14>), the repeat function is disabled and
only a single alarm will occur. The alarm can be
repeated up to 255 times by loading the lower half of
the ALCFGRPT register with FFh.
FIGURE 18-2:
Changing any of the registers, other then
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.
ALARM MASK SETTINGS
Alarm Mask Setting
(AMASK3:AMASK0)
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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 159
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 160
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
19.0
PROGRAMMABLE CYCLIC
REDUNDANCY CHECK (CRC)
GENERATOR
19.1
There are four registers used to control programmable
CRC operation:
•
•
•
•
The programmable CRC generator offers the following
features:
• User-programmable polynomial CRC equation
• Interrupt output
• Data FIFO
REGISTER 19-1:
Upper Byte:
U-0
—
bit 15
Registers
CRCCON
CRCXOR
CRCDAT
CRCWDAT
CRCCON: CRC CONTROL REGISTER
U-0
—
R/W-0
CSIDL
R-0
VWORD4
Lower Byte:
R-0
R-1
CRCFUL CRCMPT
bit 7
R-0
VWORD3
U-0
—
R-0
VWORD2
R/W-0
CRCGO
R/W-0
PLEN3
R-0
VWORD1
R-0
VWORD0
bit 8
R/W-0
PLEN2
R/W-0
PLEN1
R/W-0
PLEN0
bit 0
bit 15-14 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 VWORD4:VWORD0: Pointer Value bits
Indicates the number of valid words in the FIFO. Has a maximum value of 8 when PLEN3:PLEN0 > 7,
or 16 when PLEN3:PLEN0 ≤ 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
Unimplemented: Read as ‘0’
bit 4
CRCGO: Start CRC bit
1 = Start CRC serial shifter
0 = CRC serial shifter turned off
bit 3-0
PLEN3:PLEN0: Polynomial Length bits
Denotes the length of the polynomial to be generated minus 1.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 161
PIC24FJ128GA FAMILY
19.2
Overview
TABLE 19-1:
The module implements a software configurable CRC
generator. The terms of the polynomial and its length
can be programmed using the CRCXOR (X<15:1>) bits
and the CRCCON (PLEN3:PLEN0) bits, respectively.
EXAMPLE CRC SETUP
Bit Name
Bit Value
PLEN3:PLEN0
1111
X<15:1>
000100000010000
Note that for the value of X<15:1>, the 12th bit and the
5th bit are set to ‘1’, as required by the equation. The
0th bit required by the equation is always XORed. For
a 16-bit polynomial, the 16th bit is also always
assumed to be XORed; therefore, the X<15:1> bits do
not have the 0th bit or the 16th bit.
Consider the CRC equation:
x16 + x12 + x5 + 1
To program this polynomial into the CRC generator,
the CRC register bits should be set as shown in
Table 19-1.
The topology of a standard CRC generator is shown in
Figure 19-2.
FIGURE 19-1:
CRC SHIFTER DETAILS
PLEN<3:0>
0
1
2
15
CRC Shift Register
Hold
XOR
DOUT
OUT
IN
BIT 0
p_clk
X1
0
1
Hold
OUT
IN
BIT 1
p_clk
X2
Hold
0
1
OUT
IN
BIT 2
X3
X15
0
0
1
1
p_clk
Hold
OUT
IN
BIT 15
p_clk
CRC Read Bus
CRC Write Bus
DS39747C-page 162
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
CRC GENERATOR RECONFIGURED FOR x16 + x12 + x5 + 1
FIGURE 19-2:
XOR
D
Q
D
Q
D
Q
D
Q
D
Q
SDOx
BIT 0
BIT 4
BIT 5
BIT 12
BIT 15
p_clk
p_clk
p_clk
p_clk
p_clk
CRC Read Bus
CRC Write Bus
19.3
19.3.1
User Interface
To empty words already written into a FIFO, the
CRCGO bit must be set to ‘1’ and the CRC shifter
allowed to run until the CRCMPT bit is set.
DATA INTERFACE
To start serial shifting, a ‘1’ must be written to the
CRCGO bit.
The module incorporates a FIFO that is 8 deep when
PLEN (PLEN<3:0>) > 7, and 16 deep otherwise. The
data for which the CRC is to be calculated must first be
written into the FIFO. The smallest data element that
can be written into the FIFO is one byte. For example,
if PLEN = 5, then the size of the data is PLEN + 1 = 6.
The data must be written as follows:
If a word is written when the CRCFUL bit is set, the
VWORD pointer will roll over to 0. The hardware will
then behave as if the FIFO is empty. However, the condition to generate an interrupt will not be met; therefore,
no interrupt will be generated (See Section 19.3.2
“Interrupt Operation”).
At least one instruction cycle must pass after a write to
CRCWDAT before a read of the VWORD bits is done.
data[5:0] = crc_input[5:0]
data[7:6] = ‘bxx
Once data is written into the CRCWDAT MSb (as
defined by PLEN), the value of VWORD
(VWORD<4:0>) increments by one. The serial shifter
starts shifting data into the CRC engine when
CRCGO = 1 and VWORD > 0. When the MSb is
shifted out, VWORD decrements by one. The serial
shifter continues shifting until the VWORD reaches 0.
Therefore, for a given value of PLEN, it will take
(PLEN + 1) * VWORD number of clock cycles to
complete the CRC calculations.
When VWORD reaches 8 (or 16), the CRCFUL bit will
be set. When VWORD reaches 0, the CRCMPT bit will
be set.
To continually feed data into the CRC engine, the recommended mode of operation is to initially “prime” the
FIFO with a sufficient number of words so no interrupt
is generated before the next word can be written. Once
that is done, start the CRC by setting the CRCGO bit to
‘1’. From that point onward, the VWORD bits should be
polled. If they read less than 8 or 16, another word can
be written into the FIFO.
© 2006 Microchip Technology Inc.
Also, to get the correct CRC reading, it will be
necessary to wait for the CRCMPT bit to go high before
reading the CRCWDAT register.
19.3.2
INTERRUPT OPERATION
When VWORD4:VWORD0 makes a transition from a
value of ‘1’ to ‘0’, an interrupt will be generated.
19.4
19.4.1
Operation in Power Save Modes
SLEEP MODE
If Sleep mode is entered while the module is operating,
the module will be suspended in its current state until
clock execution resumes.
19.4.2
IDLE MODE
To continue full module operation in Idle mode, the
CSIDL bit must be cleared prior to entry into the mode.
If CSIDL = 1, the module will behave the same way as
it does in Sleep mode; pending interrupt events will be
passed on, even though the module clocks are not
available.
Preliminary
DS39747C-page 163
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 164
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
20.0
Note:
10-BIT HIGH-SPEED A/D
CONVERTER
To perform an A/D conversion:
1.
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
The 10-bit A/D converter has the following key
features:
•
•
•
•
•
•
•
•
•
•
Successive Approximation (SAR) conversion
Conversion speeds of up to 500 ksps
Up to 16 analog input pins
External voltage reference input pins
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) Select port pins as analog inputs
(AD1PCFG<15:0>).
b) Select voltage reference source to match
expected range on analog inputs
(AD1CON2<15:13>).
c) Select the analog conversion clock to
match desired data rate with processor
clock (AD1CON3<7:0>).
d) Select the appropriate sample/conversion
sequence
(AD1CON1<7:0>
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 A/D interrupt (if required):
a) Clear the AD1IF bit.
b) Select A/D interrupt priority.
Depending on the particular device pinout, the 10-bit
A/D converter can have up to 16 analog input pins, designated AN0 through AN15. In addition, there are two
analog input pins for external voltage reference connections. These voltage reference inputs may be
shared with other analog input pins. The actual number
of analog input pins and external voltage reference
input configuration will depend on the specific device.
Refer to the device data sheet for further details.
A block diagram of the A/D converter is shown in
Figure 20-1.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 165
PIC24FJ128GA FAMILY
Figure 20-1:
10-BIT HIGH-SPEED A/D CONVERTER BLOCK DIAGRAM
Internal Data Bus
AVSS
VREF+
VR Select
AVDD
16
VR+
VR-
Comparator
VREF-
VINH
VINL
AN0
AN1
VRS/H
VINH
10-Bit SAR
AN4
MUX A
AN2
AN3
VR+
DAC
AN5
Conversion Logic
Data Formatting
VINL
AN6
ADC1BUF0:
ADC1BUFF
AN7
AN8
AD1CON1
AD1CON2
AD1CON3
AD1CHS
AD1PCFG
AD1CSSL
AN10
AN11
AN12
MUX B
AN9
VINH
VINL
AN13
AN14
AN15
DS39747C-page 166
Sample Control
Control Logic
Conversion Control
Input MUX Control
Pin Config. Control
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 20-1:
Upper Byte:
R/W-0
ADON
bit 15
AD1CON1: A/D CONTROL REGISTER 1
U-0
—
R/W-0
ADSIDL
U-0
—
Lower Byte:
R/W-0
R/W-0
SSRC2
SSRC1
bit 7
U-0
—
R/W-0
SSRC0
U-0
—
U-0
—
R/W-0
FORM1
U-0
—
bit 15
ADON: A/D Operating Mode bit
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
R/W-0
FORM0
bit 8
R/W-0
ASAM
R/W-0 HCS R/C-0 HCS
SAMP
DONE
bit 0
bit 12-10 Unimplemented: Read as ‘0’
bit 9-8
FORM1:FORM0: 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
SSRC2:SSRC0: Conversion Trigger Source Select bits
111 = Internal counter ends sampling and starts conversion (auto-convert)
110 = Reserved
10x = Reserved
011 = Reserved
010 = Timer3 compare ends sampling and starts conversion
001 = Active transition on INT0 pin ends sampling and starts conversion
000 = Clearing 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 last conversion completes. SAMP bit is auto-set.
0 = Sampling begins when 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
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
W = Writable bit
C = Clear-Only bit
HCS = Hardware Cleared/Set
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 167
PIC24FJ128GA FAMILY
REGISTER 20-2:
AD1CON2: A/D CONTROL REGISTER 2
Upper Byte:
R/W-0
R/W-0
VCFG2
VCFG1
bit 15
R/W-0
VCFG0
Lower Byte:
R-0
BUFS
bit 7
U-0
r
U-0
—
U-0
—
R/W-0
SMPI3
R/W-0
CSCNA
R/W-0
SMPI2
U-0
—
R/W-0
SMPI1
U-0
—
bit 8
R/W-0
SMPI0
R/W-0
BUFM
R/W-0
ALTS
bit 0
bit 15-13 VCFG2:VCFG0: Voltage Reference Configuration bits:
VCFG2:VCFG0
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: User should write ‘0’ to this location
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
SMPI3:SMPI0: 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 configured as two 8-word buffers (ADC1BUFn<15:8> and ADC1BUFn<7:0>)
0 = Buffer 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 use MUX A input multiplexer settings
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
DS39747C-page 168
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 20-3:
Upper Byte:
R/W-0
ADRC
bit 15
AD1CON3: A/D CONTROL REGISTER 3
U-0
—
U-0
—
R/W-0
SAMC4
Lower Byte:
R/W-0
R/W-0
ADCS7
ADCS6
bit 7
bit 15
R/W-0
SAMC3
R/W-0
ADCS5
R/W-0
SAMC2
R/W-0
ADCS4
R/W-0
SAMC1
R/W-0
ADCS3
R/W-0
SAMC0
bit 8
R/W-0
ADCS2
R/W-0
ADCS1
R/W-0
ADCS0
bit 0
ADRC: A/D Conversion Clock Source bit
1 = A/D internal RC clock
0 = Clock derived from system clock
bit 14-13 Unimplemented: Read as ‘0’
bit 12-8
SAMC4:SAMC0: Auto-Sample Time bits
11111 = 31 TAD
·····
00001 = 1 TAD
00000 = 0 TAD (not recommended)
bit 7-0
ADCS7:ADCS0: A/D Conversion Clock Select bits
11111111 = 128 • TCY
······
00000001 = TCY
00000000 = TCY/2
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 169
PIC24FJ128GA FAMILY
REGISTER 20-4:
Upper Byte:
R/W-0
CH0NB
bit 15
AD1CHS: A/D INPUT SELECT REGISTER
U-0
—
U-0
—
Lower Byte:
R/W-0
CH0NA
bit 7
bit 15
U-0
—
U-0
—
R/W-0
CH0SB3
U-0
—
R/W-0
CH0SB2
U-0
—
R/W-0
CH0SB1
R/W-0
CH0SA3
R/W-0
CH0SB0
bit 8
R/W-0
CH0SA2
R/W-0
CH0SA1
R/W-0
CH0SA0
bit 0
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 14-12 Unimplemented: Read as ‘0’
bit 11-8
CH0SB3:CH0SB0: Channel 0 Positive Input Select for MUX B Multiplexer Setting bits
1111 = Channel 0 positive input is AN15
1110 = Channel 0 positive input is AN14
·····
0001 = Channel 0 positive input is AN1
0000 = 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 6-4
Unimplemented: Read as ‘0’
bit 3-0
CH0SA3:CH0SA0: Channel 0 Positive Input Select for MUX A Multiplexer Setting bits
1111 = Channel 0 positive input is AN15
1110 = Channel 0 positive input is AN14
·····
0001 = Channel 0 positive input is AN1
0000 = Channel 0 positive input is AN0
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
DS39747C-page 170
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 20-5:
AD1PCFG: A/D PORT CONFIGURATION REGISTER
Upper Byte:
R/W-0
R/W-0
PCFG15
PCFG14
bit 15
R/W-0
PCFG13
R/W-0
PCFG12
Lower Byte:
R/W-0
R/W-0
PCFG7
PCFG6
bit 7
bit 15-0
R/W-0
PCFG11
R/W-0
PCFG5
R/W-0
PCFG10
R/W-0
PCFG4
R/W-0
PCFG9
R/W-0
PCFG3
R/W-0
PCFG8
bit 8
R/W-0
PCFG2
R/W-0
PCFG1
R/W-0
PCFG0
bit 0
PCFG15:PCFG0: Analog Input Pin Configuration Control bits
1 = Pin for corresponding analog channel is configured in Digital mode; I/O port read enabled
0 = Pin configured in Analog mode; I/O port read disabled, A/D samples pin voltage
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
REGISTER 20-6:
AD1CSSL: A/D INPUT SCAN SELECT REGISTER
Upper Byte:
R/W-0
R/W-0
CSSL15
CSSL14
bit 15
R/W-0
CSSL13
R/W-0
CSSL12
Lower Byte:
R/W-0
R/W-0
CSSL7
CSSL6
bit 7
bit 15-0
x = Bit is unknown
R/W-0
CSS1L1
R/W-0
CSSL5
R/W-0
CSSL10
R/W-0
CSSL4
R/W-0
CSSL9
R/W-0
CSSL3
R/W-0
CSSL8
bit 8
R/W-0
CSSL2
R/W-0
CSSL1
R/W-0
CSSL0
bit 0
CSSL15:CSSL0: A/D Input Pin Scan Selection bits
1 = Corresponding analog channel selected for input scan
0 = Analog channel omitted from input scan
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
EQUATION 20-1:
x = Bit is unknown
A/D CONVERSION CLOCK PERIOD(1)
TAD = TCY (ADCS + 1)
ADCS =
TAD
TCY
–1
Note 1: Based on TCY = FOSC/2, Doze mode and PLL are disabled.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 171
PIC24FJ128GA FAMILY
FIGURE 20-2:
10-BIT A/D CONVERTER ANALOG INPUT MODEL
VDD
Rs
VA
RIC ≤ 250Ω
VT = 0.6V
ANx
Sampling
Switch
RSS ≤ 5 kΩ (Typical)
RSS
CPIN
6-11 pF
(Typical)
VT = 0.6V
ILEAKAGE
±500 nA
CHOLD
= DAC 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 device package and is not tested. Effect of CPIN negligible if Rs ≤ 5 kΩ.
FIGURE 20-3:
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)
DS39747C-page 172
Preliminary
(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)
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
21.0
Note:
COMPARATOR MODULE
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
FIGURE 21-1:
COMPARATOR I/O OPERATING MODES
C1NEG
C1IN+
C1IN-
C1EN
CMCON<6>
C1INV
VINC1OUT
C1POS
C1IN+
CVREF
C1
VIN+
C2NEG
C2IN+
C2IN-
C1OUTEN
C2EN
CMCON<7>
C2INV
VINC2OUT
C2POS
C2IN+
CVREF
© 2006 Microchip Technology Inc.
C2
VIN+
C2OUTEN
Preliminary
DS39747C-page 173
PIC24FJ128GA FAMILY
REGISTER 21-1:
Upper Byte:
R/W-0
CMIDL
bit 15
U-0
—
CMCON: COMPARATOR CONTROL REGISTER
R/C-0
C2EVT
R/C-0
C1EVT
Lower Byte:
R-0
R-0
C2OUT
C1OUT
bit 7
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
R/W-0
C2EN
R/W-0
C2INV
R/W-0
C1EN
R/W-0
C1INV
R/W-0
R/W-0
C2OUTEN C1OUTEN
bit 8
R/W-0
C2NEG
R/W-0
C2POS
R/W-0
C1NEG
R/W-0
C1POS
bit 0
CMIDL: Stop in Idle Mode
1 = When device enters Idle mode, module does not generate interrupts. Module is still enabled.
0 = Continue normal module operation in Idle mode
Unimplemented: Read as ‘0’
C2EVT: Comparator 2 Event
1 = Comparator output changed states
0 = Comparator output did not change states
C1EVT: Comparator 1 Event
1 = Comparator output changed states
0 = Comparator output did not change states
C2EN: Comparator 2 Enable
1 = Comparator is enabled
0 = Comparator is disabled
C1EN: Comparator 1 Enable
1 = Comparator is enabled
0 = Comparator is disabled
C2OUTEN: Comparator 2 Output Enable
1 = Comparator output is driven on the output pad
0 = Comparator output is not driven on the output pad
C1OUTEN: Comparator 1 Output Enable
1 = Comparator output is driven on the output pad
0 = Comparator output is not driven on the output pad
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
DS39747C-page 174
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 21-1:
Upper Byte:
R/W-0
CMIDL
bit 15
U-0
—
CMCON: COMPARATOR CONTROL REGISTER (CONTINUED)
R/C-0
C2EVT
R/C-0
C1EVT
Lower Byte:
R-0
R-0
C2OUT
C1OUT
bit 7
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W-0
C2EN
R/W-0
C2INV
R/W-0
C1EN
R/W-0
C1INV
R/W-0
R/W-0
C2OUTEN C1OUTEN
bit 8
R/W-0
C2NEG
R/W-0
C2POS
R/W-0
C1NEG
R/W-0
C1POS
bit 0
C2OUT: Comparator 2 Output bit
When C2INV = 0:
1 = C2 VIN+ > C2 VIN0 = C2 VIN+ < C2 VINWhen C2INV = 1:
0 = C2 VIN+ > C2 VIN1 = C2 VIN+ < C2 VINC1OUT: Comparator 1 Output bit
When C1INV = 0:
1 = C1 VIN+ > C1 VIN0 = C1 VIN+ < C1 VINWhen C1INV = 1:
0 = C1 VIN+ > C1 VIN1 = C1 VIN+ < C1 VINC2INV: Comparator 2 Output Inversion bit
1 = C2 output inverted
0 = C2 output not inverted
C1INV: Comparator 1 Output Inversion bit
1 = C1 output inverted
0 = C1 output not inverted
C2NEG: Comparator 2 Negative Input Configure bit
1 = Input is connected to VIN+
0 = Input is connected to VINSee Figure 21-1 for the comparator modes.
C2POS: Comparator 2 Positive Input Configure bit
1 = Input is connected to VIN+
0 = Input is connected to CVREF
See Figure 21-1 for the comparator modes.
C1NEG: Comparator 1 Negative Input Configure bit
1 = Input is connected to VIN+
0 = Input is connected to VINSee Figure 21-1 for the comparator modes.
C1POS: Comparator 1 Positive Input Configure bit
1 = Input is connected to VIN+
0 = Input is connected to CVREF
See Figure 21-1 for the comparator modes.
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
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 175
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 176
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
22.0
Note:
22.1
COMPARATOR VOLTAGE
REFERENCE
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
Configuring the Comparator
Voltage Reference
The voltage reference module is controlled through the
CVRCON register (Register 22-1). The comparator
voltage reference provides two ranges of output
FIGURE 22-1:
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
(CVR3:CVR0), 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.
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
VREF+
AVDD
CVRSS = 1
8R
CVRSS = 0
CVR3:CVR0
R
CVREN
R
16-to-1 MUX
R
R
16 Steps
CVREF
R
R
R
CVRR
VREF-
8R
CVRSS = 1
CVRSS = 0
AVSS
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 177
PIC24FJ128GA FAMILY
REGISTER 22-1:
Upper Byte:
U-0
—
bit 15
U-0
—
CVRCON: COMPARATOR VOLTAGE REFERENCE CONTROL REGISTER
U-0
—
U-0
—
Lower Byte:
R/W-0
R/W-0
CVREN
CVROE
bit 7
U-0
—
R/W-0
CVRR
U-0
—
R/W-0
CVRSS
U-0
—
R/W-0
CVR3
U-0
—
bit 8
R/W-0
CVR2
bit 15-8
Unimplemented: Read as ‘0’
bit 7
CVREN: Comparator Voltage Reference Enable bit
1 = CVREF circuit powered on
0 = CVREF circuit 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 = 0 to 0.67 CVRSRC, with CVRSRC/24 step size
0 = 0.25 CVRSRC to 0.75 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
CVR3:CVR0: Comparator VREF Value Selection 0 ≤ CVR3:CVR0 ≤ 15 bits
When CVRR = 1:
CVREF = (CVR<3:0>/ 24) • (CVRSRC)
When CVRR = 0:
CVREF = 1/4 • (CVRSRC) + (CVR<3:0>/32) • (CVRSRC)
Legend:
R = Readable bit
-n = Value at Reset
DS39747C-page 178
W = Writable bit
‘1’ = bit is set
Preliminary
R/W-0
CVR1
R/W-0
CVR0
bit 0
U = Unimplemented bit, read as ‘0’
‘0’ = bit is cleared
x = bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
23.0
Note:
SPECIAL FEATURES
TABLE 23-1:
This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive reference
source.
PIC24FJ128GA family devices include several
features intended to maximize application flexibility and
reliability, and minimize cost through elimination of
external components. These are:
•
•
•
•
•
•
Flexible Configuration
Watchdog Timer (WDT)
Code Protection
JTAG Boundary Scan Interface
In-Circuit Serial Programming
In-Circuit Emulation
23.1
Configuration Bits
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.
CONSIDERATIONS FOR
CONFIGURING PIC24FJ128GA
FAMILY DEVICES
In PIC24FJ128GA 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 two words at the top of the on-chip program
memory space, known as the Flash Configuration
Words. Their specific locations are shown in
Table 23-1. These are packed representations of the
actual device Configuration bits, whose actual
locations are distributed among five locations in configuration space. The configuration data is automatically
loaded from the Flash Configuration Words to the
proper Configuration registers during device Resets.
© 2006 Microchip Technology Inc.
Device
Configuration Word
Addresses
1
2
PIC24FJ64GA
00ABFEh
00ABFCh
PIC24FJ96GA
00FFFEh
00FFFCh
PIC24FJ128GA
0157FEh
0157FCh
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 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 complete list is shown in Table 23-1. A detailed explanation
of the various bit functions is provided in Register 23-1
through Register 23-4.
23.1.1
FLASH CONFIGURATION
WORDS LOCATIONS FOR
PIC24FJ128GA FAMILY
DEVICES
The volatile memory cells used for the Configuration
bits always reset to ‘1’ on Power-on Resets. For all
other type of Reset events, the previously programmed
values are maintained and used without reloading from
program memory.
The upper byte of both 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.
To prevent inadvertent configuration changes during
code execution, all programmable Configuration bits
are write-once. After a bit is initially programmed during
a power cycle, it cannot be written to again. Changing
a device configuration requires that power to the device
be cycled.
Preliminary
DS39747C-page 179
PIC24FJ128GA FAMILY
REGISTER 23-1:
Upper Third:
U-1
—
bit 23
FLASH CONFIGURATION WORD 1
U-1
—
U-1
—
Middle Third:
r-0
R/PO-1
r
bit 15
U-1
—
U-1
—
U-1
—
U-1
—
U-1
—
bit 16
R/PO-1
R/PO-1
R/PO-1
R/PO-1
U-1
GCP
GWRP
DEBUG
COE
—
JTAGEN
Lower Third:
R/PO-1
R/PO-1
FWDTEN
WINDIS
bit 7
U-1
—
R/PO-1
FWPSA
R/PO-1
WDTPS3
R/PO-1
WDTPS2
R/PO-1
ICS
bit 8
R/PO-1
WDTPS1
R/PO-1
WDTPS0
bit 0
bit 23-16 Unimplemented: Read as ‘0’
bit 15
Reserved: Maintain as ‘1’
bit 14
JTAGEN: JTAG Port Enable bit
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
COE: Set Clip On Emulation bit
1 = Device resets into Operational mode
0 = Device resets into Clip On Emulation mode
bit 9
Unimplemented: Read as ‘1’
bit 8
ICS: ICD Pin Placement Select bit
1 = ICD uses EMUC2/EMUD2
0 = ICD uses EMUC1/EMUD1
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 enabled
0 = Windowed Watchdog Timer enabled; FWDTEN must be ‘1’
bit 5
Unimplemented: Read as ‘1’
Legend:
R = Readable bit
PO = Program-Once bit
U = Unimplemented, read as ‘1’
-n = Value when unprogrammed
‘1’ = Bit is set
‘0’ = Bit is cleared
DS39747C-page 180
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 23-1:
Upper Third:
U-1
—
bit 23
FLASH CONFIGURATION WORD 1 (CONTINUED)
U-1
—
U-1
—
Middle Third:
r-0
R/PO-1
r
bit 15
JTAGEN
U-1
—
U-1
—
U-1
—
U-1
—
U-1
—
bit 16
R/PO-1
R/PO-1
R/PO-1
R/PO-1
U-1
GCP
GWRP
DEBUG
COE
—
Lower Third:
R/PO-1
R/PO-1
FWDTEN
WINDIS
bit 7
U-1
—
R/PO-1
FWPSA
R/PO-1
WDTPS3
bit 4
FWPSA: WDT Prescaler Ratio Select bit
1 = Prescaler ratio of 1:128
0 = Prescaler ratio of 1:32
bit 3-0
WDTPS3:WDTPS0: 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
R/PO-1
WDTPS2
R/PO-1
ICS
bit 8
R/PO-1
WDTPS1
R/PO-1
WDTPS0
bit 0
Legend:
R = Readable bit
PO = Program-Once bit
U = Unimplemented, read as ‘1’
-n = Value when unprogrammed
‘1’ = Bit is set
‘0’ = Bit is cleared
© 2006 Microchip Technology Inc.
Preliminary
x = Bit is unknown
DS39747C-page 181
PIC24FJ128GA FAMILY
REGISTER 23-2:
Upper Third:
U-1
—
bit 23
FLASH CONFIGURATION WORD 2
U-1
—
U-1
—
Middle Third:
R/PO-1
U-1
IESO
—
bit 15
U-1
—
U-1
—
Lower Third:
R/PO-1
R/PO-1
FCKSM1 FCKSM0
bit 7
U-1
—
U-1
—
U-1
—
R/PO-1
OSCIOFCN
U-1
—
U-1
—
U-1
—
R/PO-1
FNOSC2
U-1
—
U-1
—
bit 16
R/PO-1
FNOSC1
U-1
—
R/PO-1
FNOSC0
bit 8
R/PO-1
POSCMD1
R/PO-1
POSCMD0
bit 0
bit 23-16 Unimplemented: Read as ‘1’
bit 15
IESO: Internal External Switchover bit
1 = IESO mode (Two-Speed Start-up) enabled
0 = IESO mode (Two-Speed Start-up) disabled
bit 14-11 Unimplemented: Read as ‘1’
bit 10-8 FNOSC2:FNOSC0: 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 (HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
bit 7-6
FCKSM1:FCKSM0: 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
bit 5
OSCIOFCN: OSC2 Pin Configuration bit
If POSCMD1:POSCMD0 = 11 or 00:
1 = OSC2/CLKO/RC15 functions as CLKO (FOSC/2)
0 = OSC2/CLKO/RC15 functions as port I/O (RC15)
If POSCMD1:POSCMD0 = 10 or 01:
OSCIOFCN has no effect on OSC2/CLKO/RC15.
bit 4-2
Unimplemented: Read as ‘1’
bit 1-0
POSCMD1:POSCMD0: Primary Oscillator Configuration bits
11 = Primary oscillator disabled
10 = HS Oscillator mode selected
01 = XT Oscillator mode selected
00 = EC Oscillator mode selected
.
Legend:
R = Readable bit
PO = Program-Once bit
U = Unimplemented bit, read as ‘1’
-n = Value when unprogrammed
‘1’ = Bit is set
‘0’ = Bit is cleared
DS39747C-page 182
Preliminary
x = Bit is unknown
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
REGISTER 23-3:
Upper Third:
U
—
bit 23
DEVID: DEVICE ID REGISTER
U
—
Middle Third:
U
—
bit 15
U
—
U
—
U
—
U
—
U
—
U
—
R
FAMID7
R
FAMID6
R
FAMID5
R
FAMID4
Lower Third:
R
R
FAMID1
FAMID0
bit 7
R
DEV5
R
DEV4
R
DEV3
U
—
bit 16
R
FAMID3
R
DEV2
R
FAMID2
bit 8
R
DEV1
R
DEV0
bit 0
bit 23-14 Unimplemented: Read as ‘0’
bit 13-6
FAMID7:FAMID0: Device Family Identifier bits
00010000 = PIC24FJ128GA family
bit 5-0
DEV5:DEV0: Individual Device Identifier bits
000101 = PIC24FJ64GA006
000110 = PIC24FJ96GA006
000111 = PIC24FJ128GA006
001000 = PIC24FJ64GA008
001001 = PIC24FJ96GA008
001010 = PIC24FJ128GA008
001011 = PIC24FJ64GA010
001100 = PIC24FJ96GA010
001101 = PIC24FJ128GA010
Legend:
R = Readable bit
© 2006 Microchip Technology Inc.
U = Unimplemented bit, read as ‘0’
Preliminary
DS39747C-page 183
PIC24FJ128GA FAMILY
REGISTER 23-4:
Upper Third:
U
—
bit 23
DEVREV: DEVICE REVISION REGISTER
U
—
Middle Third:
R
r
bit 15
U
—
R
r
U
—
U
—
R
r
Lower Third:
R
R
MAJRV1
MAJRV0
bit 7
U
—
R
r
U
—
U
—
U
—
U
—
U
—
bit 16
U
—
U
—
U
—
R
DOT2
R
MAJRV2
bit 8
R
DOT1
R
DOT0
bit 0
bit 23-16 Unimplemented: Read as ‘0’
bit 15-12 Reserved: For factory use only
bit 11-9
Unimplemented: Read as ‘0’
bit 8-6
MAJRV2:MAJRV0: Major Revision Identifier bits
bit 5-3
Unimplemented: Read as ‘0’
bit 2-0
DOT2:DOT0: Minor Revision Identifier bits
Legend:
R = Readable bit
DS39747C-page 184
r = Reserved bit
Preliminary
U = Unimplemented bit, read as ‘0’
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
23.2
On-Chip Voltage Regulator
FIGURE 23-1:
All of the PIC24FJ128GA 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 PIC24FJ128GA family incorporate an on-chip regulator that allows the device to
run its core logic from VDD.
Regulator Enabled (ENVREG tied to VDD):
3.3V
PIC24FJ128GA
VDD
ENVREG
The regulator is controlled by the ENVREG pin. Tying
VDD 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
tantalum) must be connected to the VDDCORE/VCAP pin
(Figure 23-1). This helps to maintain the stability of the
regulator. The recommended value for the filer capacitor
is provided in Section 26.1 “DC Characteristics”.
VDDCORE/VCAP
CEFC
(10 μF typ)
VSS
Regulator Disabled (ENVREG tied to ground):
If ENVREG is tied to VSS, 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 23-1 for possible
configurations.
23.2.1
CONNECTIONS FOR THE
ON-CHIP REGULATOR
2.5V(1)
3.3V(1)
PIC24FJ128GA
VDD
ENVREG
VDDCORE/VCAP
VSS
ON-CHIP REGULATOR AND POR
When the voltage regulator is enabled, it takes approximately 20 μs for it to generate output. During this time,
designated as TSTARTUP, code execution is disabled.
TSTARTUP is applied every time the device resumes
operation after any power-down, including Sleep mode.
Regulator Disabled (VDD tied to VDDCORE):
2.5V(1)
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.
PIC24FJ128GA
VDD
23.2.2
VDDCORE/VCAP
ON-CHIP REGULATOR AND BOR
When
the
on-chip
regulator
is
enabled,
PIC24FJ128GA family devices also have a simple
brown-out capability. If the voltage supplied to the regulator is inadequate to maintain a regulated level, the
regulator Reset circuitry will generate a Brown-out
Reset. This event is captured by the BOR flag bit
(RCON<0>). The brown-out voltage levels are specific
in Section 26.1 “DC Characteristics”.
23.2.3
ENVREG
VSS
Note 1:
These are typical operating voltages. Refer
to Section 26.1 “DC Characteristics” for
the full operating ranges of VDD and
VDDCORE.
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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 185
PIC24FJ128GA FAMILY
23.3
Watchdog Timer (WDT)
For PIC24FJ128GA family devices, the WDT is driven
by the LPRC oscillator. When the WDT is enabled, the
clock source is also enabled.
The nominal WDT clock source from LPRC is 32 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 32 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.
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 WDTPS3:WDTPS0
Configuration bits (Flash Configuration Word 1<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 ranging from 1 ms to 131 seconds can
be achieved.
The WDT, prescaler and postscaler are reset:
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:
23.3.1
The CLRWDT and PWRSAV instructions
clear the prescaler and postscaler counts
when executed.
CONTROL REGISTER
The WDT is enabled or disabled by the FWDTEN
device 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 software
WDT option allows the user to enable the WDT for critical code segments and disable the WDT during
non-critical segments for maximum power savings.
• 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
FIGURE 23-2:
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.
WDT BLOCK DIAGRAM
SWDTEN
FWDTEN
LPRC Control
FWPSA
WDTPS3:WDTPS0
Prescaler
(5-bit/7-bit)
LPRC Input
32 kHz
Wake from Sleep
WDT
Counter
Postscaler
1:1 to 1:32.768
WDT Overflow
Reset
1 ms/4 ms
All Device Resets
Transition to
New Clock Source
Exit Sleep or
Idle Mode
CLRWDT Instr.
PWRSAV Instr.
Sleep or Idle Mode
DS39747C-page 186
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
23.4
JTAG Interface
23.6
PIC24FJ128GA family devices implement a JTAG
interface, which supports boundary scan device testing
as well as in-circuit programming.
23.5
Program Verification and
Code Protection
For all devices in the PIC24FJ128GA family of devices,
the on-chip program memory space is treated as a
single block. 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.
23.5.1
CONFIGURATION REGISTER
PROTECTION
The Configuration registers are protected against inadvertent or unwanted changes or reads in two ways. The
primary protection is the write-once feature of the
Configuration bits which prevents reconfiguration once
the bit has been programmed during a power cycle. 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.
In-Circuit Serial Programming
PIC24FJ128GA family microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with two lines for clock (PGCx) and data
(PGDx) 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.
23.7
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 EMUCx (Emulation/Debug Clock) and
EMUDx (Emulation/Debug Data) pins.
To use the In-Circuit Debugger function of the device,
the design must implement ICSP connections to
MCLR, VDD, VSS, PGCx, PGDx and the
EMUDx/EMUCx pin pair. 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.
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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 187
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 188
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
24.0
Note:
INSTRUCTION SET SUMMARY
This chapter is a brief summary of the
PIC24 instruction set architecture, and is
not intended to be a comprehensive reference source. For detailed information on
programming
The PIC24 instruction set adds many enhancements to
the previous PICmicro® MCU instruction sets, while
maintaining an easy migration from previous PICmicro
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
Table 24-1 shows the general symbols used in
describing the instructions. The PIC24 instruction set
summary in Table 24-2 lists all 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’
The literal instructions that involve data movement may
use some of the following operands:
• 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
All instructions are a single word, except for certain
double-word instructions, which were made doubleword 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.
Most bit-oriented instructions (including simple rotate/
shift instructions) have two operands:
• 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’)
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 189
PIC24FJ128GA FAMILY
TABLE 24-1:
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...16384}
lit16
16-bit unsigned literal ∈ {0...65535}
lit23
23-bit unsigned literal ∈ {0...8388608}; 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] }
DS39747C-page 190
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 24-2:
INSTRUCTION SET OVERVIEW
Assembly
Mnemonic
ADD
ADDC
AND
ASR
BCLR
BRA
BSET
BSW
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
None
BRA
Wn
Computed Branch
1
2
BSET
f,#bit4
Bit Set f
1
1
None
BSET
Ws,#bit4
Bit Set Ws
1
1
None
None
BSW.C
Ws,Wb
Write C bit to Ws<Wb>
1
1
BSW.Z
Ws,Wb
Write Z bit to Ws<Wb>
1
1
None
BTG
BTG
f,#bit4
Bit Toggle f
1
1
None
BTG
Ws,#bit4
Bit Toggle Ws
1
1
None
BTSC
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)
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 191
PIC24FJ128GA FAMILY
TABLE 24-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
BTSS
BTST
BTSTS
CALL
CLR
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
BTST.Z
Ws,Wb
Bit Test Ws<Wb> to Z
1
1
Z
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
lit23
Call Subroutine
2
2
None
CALL
Wn
Call Indirect Subroutine
1
2
None
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
CP1
CP1
f
Compare f with 0xFFFF
1
1
C, DC, N, OV, Z
CP1
Ws
Compare Ws with 0xFFFF
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)
CP
DAW
DAW
Wn
Wn = Decimal Adjust Wn
1
1
C
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
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
DEC2
EXCH
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
Wns,Wnd
Swap Wns with Wnd
1
1
None
DS39747C-page 192
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 24-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
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
GOTO
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
INC
Ws,Wd
Wd = Ws + 1
1
1
C, DC, N, OV, Z
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
INC2
Ws,Wd
Wd = Ws + 2
1
1
C, DC, N, OV, Z
N, Z
INC
INC2
IOR
IOR
f
f = f .IOR. WREG
1
1
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
None
LNK
LNK
#lit14
Link Frame Pointer
1
1
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
MOV
MUL
NEG
NOP
POP
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
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
Wd = Ws + 1
1
1
C, DC, N, OV, Z
None
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.S
Pop Shadow Registers
1
1
All
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 193
PIC24FJ128GA FAMILY
TABLE 24-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
PUSH
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
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
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
#lit14
Repeat Next Instruction lit14 + 1 times
1
1
None
REPEAT
Wn
Repeat Next Instruction (Wn) + 1 times
1
1
None
Software Device Reset
1
1
None
REPEAT
RESET
RESET
RETFIE
RETFIE
RETLW
RETLW
Return from Interrupt
1
3 (2)
None
#lit10,Wn
Return with Literal in Wn
1
3 (2)
None
None
RETURN
RETURN
Return from Subroutine
1
3 (2)
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
RLNC
RRC
RRNC
SE
SETM
SL
SUB
SUBB
SUBR
RLC
Ws,Wd
Wd = Rotate Left through Carry Ws
1
1
C, N, Z
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
RLNC
Ws,Wd
Wd = Rotate Left (No Carry) Ws
1
1
N, Z
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
Ws,Wnd
Wnd = Sign-Extended Ws
1
1
C, N, Z
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
C, DC, N, OV, Z
SUBB
f,WREG
WREG = f – WREG – (C)
1
1
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
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
SUBR
Wb,#lit5,Wd
Wd = lit5 – Wb
1
1
C, DC, N, OV, Z
DS39747C-page 194
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 24-2:
INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic
SUBBR
Assembly Syntax
Description
# of
Words
# of
Cycles
Status Flags
Affected
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
TBLRDH
TBLRDH
Ws,Wd
Read Prog<23:16> to Wd<7:0>
1
2
None
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
SWAP
ZE
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 195
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 196
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
25.0
DEVELOPMENT SUPPORT
25.1
The PICmicro® microcontrollers are supported with a
full range of hardware and software development tools:
• Integrated Development Environment
- MPLAB® IDE Software
• Assemblers/Compilers/Linkers
- MPASMTM Assembler
- MPLAB C18 and MPLAB C30 C Compilers
- MPLINKTM Object Linker/
MPLIBTM Object Librarian
- MPLAB ASM30 Assembler/Linker/Library
• Simulators
- MPLAB SIM Software Simulator
• Emulators
- MPLAB ICE 2000 In-Circuit Emulator
- MPLAB ICE 4000 In-Circuit Emulator
• In-Circuit Debugger
- MPLAB ICD 2
• Device Programmers
- PICSTART® Plus Development Programmer
- MPLAB PM3 Device Programmer
- PICkit™ 2 Development Programmer
• Low-Cost Demonstration and Development
Boards and Evaluation Kits
MPLAB Integrated Development
Environment Software
The MPLAB IDE software brings an ease of software
development previously unseen in the 8/16-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)
- 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
• Visual device initializer for easy register
initialization
• 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
HI-TECH Software C Compilers and IAR
C Compilers
The MPLAB IDE allows you to:
• Edit your source files (either assembly or C)
• One touch assemble (or compile) and download
to PICmicro MCU emulator and simulator tools
(automatically updates all project information)
• Debug using:
- Source files (assembly or C)
- Mixed assembly and C
- 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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 197
PIC24FJ128GA FAMILY
25.2
MPASM Assembler
25.5
The MPASM Assembler is a full-featured, universal
macro assembler for all PICmicro 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:
MPLAB ASM30 Assembler produces relocatable
machine code from symbolic assembly language for
dsPIC30F devices. MPLAB C30 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:
•
•
•
•
•
•
• 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
Support for the entire dsPIC30F instruction set
Support for fixed-point and floating-point data
Command line interface
Rich directive set
Flexible macro language
MPLAB IDE compatibility
25.6
25.3
MPLAB C18 and MPLAB C30
C Compilers
The MPLAB C18 and MPLAB C30 Code Development
Systems are complete ANSI C compilers for
Microchip’s PIC18 family of microcontrollers and the
dsPIC30, dsPIC33 and PIC24 family of digital signal
controllers. These compilers provide powerful integration capabilities, superior code optimization and ease
of use not found with other compilers.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
25.4
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.
MPLAB ASM30 Assembler, Linker
and Librarian
MPLAB SIM Software Simulator
The MPLAB SIM Software Simulator allows code
development in a PC-hosted environment by simulating the PICmicro 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 C18 and
MPLAB C30 C Compilers, and the MPASM and
MPLAB ASM30 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.
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
DS39747C-page 198
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
25.7
MPLAB ICE 2000
High-Performance
In-Circuit Emulator
25.9
The MPLAB ICE 2000 In-Circuit Emulator is intended
to provide the product development engineer with a
complete microcontroller design tool set for PICmicro
microcontrollers. Software control of the MPLAB ICE
2000 In-Circuit Emulator is advanced by the MPLAB
Integrated Development Environment, which allows
editing, building, downloading and source debugging
from a single environment.
The MPLAB ICE 2000 is a full-featured emulator
system with enhanced trace, trigger and data monitoring features. Interchangeable processor modules allow
the system to be easily reconfigured for emulation of
different processors. The architecture of the MPLAB
ICE 2000 In-Circuit Emulator allows expansion to
support new PICmicro microcontrollers.
The MPLAB ICE 2000 In-Circuit Emulator system has
been designed as a real-time emulation system with
advanced features that are typically found on more
expensive development tools. The PC platform and
Microsoft® Windows® 32-bit operating system were
chosen to best make these features available in a
simple, unified application.
25.8
MPLAB ICE 4000
High-Performance
In-Circuit Emulator
The MPLAB ICE 4000 In-Circuit Emulator is intended to
provide the product development engineer with a
complete microcontroller design tool set for high-end
PICmicro MCUs and dsPIC DSCs. Software control of
the MPLAB ICE 4000 In-Circuit Emulator is provided by
the MPLAB Integrated Development Environment,
which allows editing, building, downloading and source
debugging from a single environment.
MPLAB ICD 2 In-Circuit Debugger
Microchip’s In-Circuit Debugger, MPLAB ICD 2, is a
powerful, low-cost, run-time development tool,
connecting to the host PC via an RS-232 or high-speed
USB interface. This tool is based on the Flash PICmicro
MCUs and can be used to develop for these and other
PICmicro MCUs and dsPIC DSCs. The MPLAB ICD 2
utilizes the in-circuit debugging capability built into
the Flash devices. This feature, along with Microchip’s
In-Circuit Serial ProgrammingTM (ICSPTM) protocol,
offers cost-effective, in-circuit Flash debugging from the
graphical user interface of the MPLAB Integrated
Development Environment. This enables a designer to
develop and debug source code by setting breakpoints,
single stepping and watching variables, and CPU
status and peripheral registers. Running at full speed
enables testing hardware and applications in real
time. MPLAB ICD 2 also serves as a development
programmer for selected PICmicro devices.
25.10 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
PICmicro 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 SD/MMC card for
file storage and secure data applications.
The MPLAB ICE 4000 is a premium emulator system,
providing the features of MPLAB ICE 2000, but with
increased emulation memory and high-speed performance for dsPIC30F and PIC18XXXX devices. Its
advanced emulator features include complex triggering
and timing, and up to 2 Mb of emulation memory.
The MPLAB ICE 4000 In-Circuit Emulator system has
been designed as a real-time emulation system with
advanced features that are typically found on more
expensive development tools. The PC platform and
Microsoft Windows 32-bit operating system were
chosen to best make these features available in a
simple, unified application.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 199
PIC24FJ128GA FAMILY
25.11 PICSTART Plus Development
Programmer
25.13 Demonstration, Development and
Evaluation Boards
The PICSTART Plus Development Programmer is an
easy-to-use, low-cost, prototype programmer. It
connects to the PC via a COM (RS-232) port. MPLAB
Integrated Development Environment software makes
using the programmer simple and efficient. The
PICSTART Plus Development Programmer supports
most PICmicro devices in DIP packages up to 40 pins.
Larger pin count devices, such as the PIC16C92X and
PIC17C76X, may be supported with an adapter socket.
The PICSTART Plus Development Programmer is CE
compliant.
A wide variety of demonstration, development and
evaluation boards for various PICmicro 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.
25.12 PICkit 2 Development Programmer
The PICkit™ 2 Development Programmer is a low-cost
programmer with an easy-to-use interface for programming many of Microchip’s baseline, mid-range
and PIC18F families of Flash memory microcontrollers.
The PICkit 2 Starter Kit includes a prototyping development board, twelve sequential lessons, software and
HI-TECH’s PICC Lite C compiler, and is designed to
help get up to speed quickly using PIC® microcontrollers. The kit provides everything needed to
program, evaluate and develop applications using
Microchip’s powerful, mid-range Flash memory family
of microcontrollers.
DS39747C-page 200
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.
Check the Microchip web page (www.microchip.com)
and the latest “Product Selector Guide” (DS00148) for
the complete list of demonstration, development and
evaluation kits.
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
26.0
ELECTRICAL CHARACTERISTICS
This section provides an overview of the PIC24FJ128GA family electrical characteristics. Additional information will be
provided in future revisions of this document as it becomes available.
Absolute maximum ratings for the PIC24FJ128GA 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 +85°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 +2.8V
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 26-2).
†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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 201
PIC24FJ128GA FAMILY
26.1
DC Characteristics
TABLE 26-1:
OPERATING MIPS VS. VOLTAGE
Max MIPS
VDD Range
(in Volts)
Temp Range
(in °C)
PIC24FJ128GA
2.0-3.6V
-40°C to +85°C
16
TABLE 26-2:
THERMAL OPERATING CONDITIONS
Rating
Symbol
Min
Typ
Max
Unit
Operating Junction Temperature Range
TJ
-40
—
+125
°C
Operating Ambient Temperature Range
TA
-40
—
+85
°C
PIC24FJ128GA:
Power Dissipation:
Internal Chip Power Dissipation:
PINT = VDD x (IDD – Σ IOH)
PD
PINT + PI/O
W
PDMAX
(TJ – TA)/θJA
W
I/O Pin Power Dissipation:
PI/O = Σ ({VDD – VOH} x IOH) + Σ (VOL x IOL)
Maximum Allowed Power Dissipation
TABLE 26-3:
THERMAL PACKAGING CHARACTERISTICS
Characteristic
Package Thermal Resistance, 14x14x1 mm TQFP
Package Thermal Resistance, 12x12x1 mm TQFP
Package Thermal Resistance, 10x10x1 mm TQFP
Note 1:
Symbol
Typ
Max
Unit
Notes
θJA
θJA
θJA
50
—
°C/W
(Note 1)
69.4
—
°C/W
(Note 1)
76.6
—
°C/W
(Note 1)
Junction to ambient thermal resistance, Theta-JA (θJA) numbers are achieved by package simulations.
TABLE 26-4:
DC 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
Min
Typ(1)
Max
Units
VDD
2.7
—
3.6
V
Regulator enabled
VDD
VDDCORE
—
3.6
V
Regulator disabled
Regulator disabled
Characteristic
Conditions
Operating Voltage
DC10
Supply Voltage
VDDCORE
2.0
—
2.75
V
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
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.
DS39747C-page 202
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 26-5:
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
DC CHARACTERISTICS
Parameter
No.
Typical(1)
Max
Units
Conditions
Operating Current (IDD)(2)
DC20
1.6
4.0
mA
-40°C
DC20a
1.6
4.0
mA
+25°C
DC20b
1.6
4.0
mA
+85°C
DC20d
1.6
4.0
mA
-40°C
DC20e
1.6
4.0
mA
+25°C
DC20f
1.6
4.0
mA
+85°C
DC23
6.0
12
mA
-40°C
DC23a
6.0
12
mA
+25°C
DC23b
6.0
12
mA
+85°C
DC23d
6.0
12
mA
-40°C
DC23e
6.0
12
mA
+25°C
DC23f
6.0
12
mA
+85°C
DC24
20
32
mA
-40°C
DC24a
20
32
mA
+25°C
DC24b
20
32
mA
+85°C
DC24d
20
32
mA
-40°C
DC24e
20
32
mA
+25°C
DC24f
20
32
mA
+85°C
DC31
70
150
μA
-40°C
DC31a
100
200
μA
+25°C
DC31b
200
400
μA
+85°C
DC31d
70
150
μA
-40°C
DC31e
100
200
μA
+25°C
DC31f
200
400
μA
+85°C
Note 1:
2:
3:
4:
2.5V(3)
1 MIPS
3.6V(4)
2.5V(3)
4 MIPS
3.6V(4)
2.5V(3)
16 MIPS
3.6V(4)
2.5V(3)
LPRC (31 kHz)
3.6V(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: OSC1
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.
On-chip voltage regulator disabled (ENVREG tied to VSS).
On-chip voltage regulator enabled (ENVREG tied to VDD).
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 203
PIC24FJ128GA FAMILY
TABLE 26-6:
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)
Max
Units
Conditions
Idle Current (IIDLE): Core Off, Clock On Base Current(2)
DC40
0.7
2
mA
-40°C
DC40a
0.7
2
mA
+25°C
DC40b
0.7
2
mA
+85°C
DC40d
0.7
2
mA
-40°C
DC40e
0.7
2
mA
+25°C
DC40f
0.7
2
mA
+85°C
DC43
2.1
4
mA
-40°C
DC43a
2.1
4
mA
+25°C
DC43b
2.1
4
mA
+85°C
DC43d
2.1
4
mA
-40°C
DC43e
2.1
4
mA
+25°C
DC43f
2.1
4
mA
+85°C
DC47
6.8
8
mA
-40°C
DC47a
6.8
8
mA
+25°C
DC47b
6.8
8
mA
+85°C
DC47c
6.8
8
mA
-40°C
DC47d
6.8
8
mA
+25°C
DC47e
6.8
8
mA
+85°C
DC51
150
500
μA
-40°C
DC51a
150
500
μA
+25°C
DC51b
150
500
μA
+85°C
DC51d
150
500
μA
-40°C
DC51e
150
500
μA
+25°C
DC51f
150
500
μA
+85°C
Note 1:
2:
3:
4:
2.5V(3)
1 MIPS
3.6V(4)
2.5V(3)
4 MIPS
3.6V(4)
2.5V(3)
16 MIPS
3.6V(4)
2.5V(3)
LPRC (31 kHz)
3.6V(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 core off, clock on and all modules turned off.
On-chip voltage regulator disabled (ENVREG tied to VSS).
On-chip voltage regulator enabled (ENVREG tied to VDD).
DS39747C-page 204
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 26-7:
DC CHARACTERISTICS: POWER-DOWN CURRENT (IPD)
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)
Max
Units
Conditions
Power-Down Current (IPD)(2)
DC60
3
25
μA
-40°C
DC60a
3
45
μA
+25°C
DC60b
100
600
μA
+85°C
DC60f
20
40
μA
-40°C
DC60g
27
60
μA
+25°C
DC60h
120
600
μA
+85°C
2.0V(3)
Base Power-Down Current(5)
3.6V(4)
Module Differential Current
DC61
10
25
μA
-40°C
DC61a
10
25
μA
+25°C
DC61b
10
25
μA
+85°C
DC61f
10
25
μA
-40°C
DC61g
10
25
μA
+25°C
DC61h
10
25
μA
+85°C
DC62
8
15
μA
-40°C
DC62a
8
15
μA
+25°C
DC62b
8
15
μA
+85°C
DC62f
8
15
μA
-40°C
DC62g
8
15
μA
+25°C
8
15
μA
+85°C
DC62h
Note 1:
2:
3:
4:
5:
2.0V(3)
Watchdog Timer Current: ΔIWDT(5)
3.6V(4)
2.0V(3)
RTCC + Timer1 w/32 kHz Crystal:
ΔIRTCC(5)
3.6V(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 all peripherals and clocks shut down. All I/Os are configured as inputs and
pulled high. WDT, etc., are all switched off.
On-chip voltage regulator disabled (ENVREG tied to VSS).
On-chip voltage regulator enabled (ENVREG tied to VDD).
The Δ current is the additional current consumed when the module is enabled. This current should be
added to the base IPD current.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 205
PIC24FJ128GA FAMILY
TABLE 26-8:
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
DC CHARACTERISTICS
Param
No.
Min
Typ(1)
Max
Units
I/O pins
VSS
—
0.2 VDD
V
DI11
PMP pins
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
SDAx, SCLx
VSS
—
0.3 VDD
V
SMBus disabled
DI19
SDAx, SCLx
VSS
—
0.8
V
SMBus enabled
0.8 VDD
0.8 VDD
—
—
VDD
5.5
V
V
0.25 VDD + 0.8
—
VDD
V
Sym
VIL
DI10
VIH
DI20
Characteristic
Conditions
Input Low Voltage
PMPTTL = 1
Input High Voltage
I/O pins:
With Analog Functions
Digital-Only
DI21
PMP pins
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
DI28
SDAx, SCLx
0.7 VDD
—
VDD
V
SMBus disabled
DI29
SDAx, SCLx
2.1
—
VDD
V
SMBus enabled,
2.5V ≤ VPIN ≤ VDD
50
250
400
μA
VDD = 3.3V, VPIN = VSS
DI30
ICNPU CNxx Pull-up Current
IIL
Input Leakage
PMPTTL = 1
Current(2,3)
DI50
I/O Ports
—
—
+1
μA
VSS ≤ VPIN ≤ VDD,
Pin at high-impedance
DI51
Analog Input pins
—
—
+1
μA
VSS ≤ VPIN ≤ VDD,
Pin at high-impedance
DI55
MCLR
—
—
+1
μA
VSS ≤ VPIN ≤ VDD
DI56
OSC1
—
—
+1
μA
VSS ≤ VPIN ≤ VDD,
XT and HS modes
Note 1:
2:
3:
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.
DS39747C-page 206
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
TABLE 26-9:
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
DC CHARACTERISTICS
Param
No.
Sym
VOL
Characteristic
I/O Ports
DO16
OSC2/CLKO
DO20
Note 1:
Max
Units
—
—
0.4
V
IOL = 8.5 mA, VDD = 3.6V
—
—
0.4
V
IOL = 6.0 mA, VDD = 2.0V
—
—
0.4
V
IOL = 8.5 mA, VDD = 3.6V
—
—
0.4
V
IOL = 6.0 mA, VDD = 2.0V
2.4
—
—
V
IOH = -6.0 mA, VDD = 3.6V
1.4
—
—
V
IOH = -3.0 mA, VDD = 2.0V
Conditions
Output High Voltage
I/O Ports
DO26
Typ(1)
Output Low Voltage
DO10
VOH
Min
OSC2/CLKO
2.4
—
—
V
IOH = -6.0 mA, VDD = 3.6V
1.4
—
—
V
IOH = -3.0 mA, VDD = 2.0V
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
TABLE 26-10: DC CHARACTERISTICS: PROGRAM MEMORY
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
DC CHARACTERISTICS
Param
No.
Sym
Characteristic
Min
Typ(1)
Max
Units
Conditions
Program Flash Memory
D130
EP
Cell Endurance
100
1K
—
E/W
D131
VPR
VDD for Read
VMIN
—
3.6
V
VMIN = Minimum operating
voltage
D132B
VPEW VDD for Self-Timed Write
VMIN
—
3.6
V
VMIN = Minimum operating
voltage
D133A
TIW
—
3
—
ms
D134
TRETD Characteristic Retention
20
—
—
Year
D135
IDDP
—
10
—
mA
Note 1:
Self-Timed Write Cycle
Time
Supply Current during
Programming
-40°C to +85°C
Provided no other specifications are
violated
Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
TABLE 26-11: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS
Operating Conditions: -40°C < TA < +85°C (unless otherwise stated)
Param
No.
Symbol
Characteristics
Min
Typ
Max
Units
Comments
VRGOUT
Regulator Output Voltage
—
2.5
—
V
CEFC
External Filter Capacitor
Value
4.7
10
—
μF
Capacitor must be low
series resistance
TVREG
—
10
—
μs
ENVREG = 1
TPWRT
—
64
—
ms
ENVREG = 0
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 207
PIC24FJ128GA FAMILY
26.2
AC Characteristics and Timing Parameters
The information contained in this section defines the PIC24FJ128GA family AC characteristics and timing parameters.
TABLE 26-12: 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
Operating voltage VDD range as described in Section 26.1 “DC Characteristics”.
AC CHARACTERISTICS
FIGURE 26-1:
LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS
Load Condition 1 – for all pins except OSC2
Load Condition 2 – for OSC2
VDD/2
CL
Pin
RL
VSS
CL
Pin
RL = 464Ω
CL = 50 pF for all pins except OSC2
15 pF for OSC2 output
VSS
TABLE 26-13: CAPACITIVE LOADING REQUIREMENTS ON OUTPUT PINS
Param
Symbol
No.
Characteristic
Min
Typ(1)
Max
Units
Conditions
DO50
COSC2
OSC2/CLKO pin
—
—
15
pF
In XT and HS modes when
external clock is used to drive
OSC1.
DO56
CIO
All I/O pins and OSC2
—
—
50
pF
EC mode
DO58
CB
SCLx, SDAx
—
—
400
pF
In I2C™ mode
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.
DS39747C-page 208
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
FIGURE 26-2:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
OSC1
OS20
OS30
OS30
OS31
OS31
OS25
CLKO
OS40
OS41
TABLE 26-14: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Param
Sym
No.
OS10
Characteristic
FOSC External CLKI Frequency
(External clocks allowed
only in EC mode)
Oscillator Frequency
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
Min
Typ(1)
Max
Units
DC
3
—
—
32
8
MHz
MHz
EC
ECPLL
3
3
10
31
—
—
—
—
10
8
32
33
MHz
MHz
MHz
kHz
XT
XTPLL
HS
SOSC
—
—
—
—
Conditions
OS20
TOSC TOSC = 1/FOSC
OS25
TCY
33
—
DC
ns
OS30
TosL, External Clock in (OSC1)
TosH High or Low Time
0.45 x TOSC
—
—
ns
EC
OS31
TosR, External Clock in (OSC1)
TosF Rise or Fall Time
—
—
20
ns
EC
OS40
TckR CLKO Rise Time(3)
OS41
TckF
Note 1:
2:
3:
Instruction Cycle Time(2)
CLKO Fall Time(3)
—
6
10
ns
—
6
10
ns
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 OSC1/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 OSC2 pin. CLKO is low for the
Q1-Q2 period (1/2 TCY) and high for the Q3-Q4 period (1/2 TCY).
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 209
PIC24FJ128GA FAMILY
TABLE 26-15: 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
AC CHARACTERISTICS
Param
No.
Characteristic(1)
Sym
Min
Typ(2)
Max
Units
OS50
FPLLI
PLL Input Frequency
Range(2)
2
—
8
MHz
OS51
FSYS
On-Chip VCO System
Frequency
8
—
32
MHz
OS52
TLOC
PLL Start-up Time
(Lock Time)
—
—
2
ms
OS53
DCLK
CLKO Stability (Jitter)
-2
1
+2
%
Note 1:
2:
Conditions
ECPLL, HSPLL, XTPLL
modes
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 26-16: AC CHARACTERISTICS: INTERNAL RC ACCURACY
AC CHARACTERISTICS
Param
No.
Characteristic
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C ≤ TA ≤ +85°C for Industrial
Min
Typ
Max
Units
Conditions
Internal FRC Accuracy @ 8 MHz(1)
F20
FRC
-2
—
+2
%
+25°C
VDD = 3.0-3.6V
-5
—
+5
%
-40°C ≤ TA ≤ +85°C
VDD = 3.0-3.6V
Legend: TBD = To Be Determined
Note 1: Frequency calibrated at 25°C and 3.3V. TUN bits can be used to compensate for temperature drift.
TABLE 26-17: INTERNAL RC ACCURACY
AC CHARACTERISTICS
Param
No.
Characteristic
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
Min
Typ
Max
Units
-15
—
+15
%
Conditions
LPRC @ 31 kHz(1)
F21
Note 1:
-40°C ≤ TA ≤ +85°C
VDD = 3.0-3.6V
Change of LPRC frequency as VDD changes.
DS39747C-page 210
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
FIGURE 26-3:
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 26-1 for load conditions.
TABLE 26-18: CLKO AND I/O TIMING REQUIREMENTS
AC CHARACTERISTICS
Param
No.
Sym
Characteristic
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature
-40°C ≤ TA ≤ +85°C for Industrial
Min
Typ(1)
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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 211
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 212
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
27.0
PACKAGING INFORMATION
27.1
Package Marking Information
64-Lead TQFP (10x10x1 mm)
Example
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
PIC24FJ128
GA006-I/
PT e3
0510017
Example
80-Lead TQFP (12x12x1 mm)
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
PIC24FJ128GA
008-I/PT e3
0510017
100-Lead TQFP (12x12x1 mm)
Example
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
PIC24FJ128GA
010-I/PT e3
0510017
100-Lead TQFP (14x14x1 mm)
Example
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
Legend: XX...X
Y
YY
e3
WW
NNN
*
Note:
PIC24FJ128GA
010-I/PF e3
0510017
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.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 213
PIC24FJ128GA FAMILY
27.2
Package Details
The following sections give the technical details of the packages.
64-Lead Plastic Thin Quad Flatpack (PT) 10x10x1 mm Body, 1.0/0.10 mm Lead Form (TQFP)
E
E1
#leads=n1
p
D1
D
2
1
B
n
CH x 45°
α
A
c
φ
L
β
A2
A1
(F)
Units
Dimension Limits
n
p
MIN
INCHES
NOM
64
.020
16
.043
.039
.006
.024
.039
3.5
.472
.472
.394
.394
.007
.009
.035
10
10
MAX
MILLIMETERS*
NOM
64
0.50
16
1.00
1.10
0.95
1.00
0.05
0.15
0.45
0.60
1.00
0
3.5
11.75
12.00
11.75
12.00
9.90
10.00
9.90
10.00
0.13
0.18
0.17
0.22
0.64
0.89
5
10
5
10
MIN
Number of Pins
Pitch
Pins per Side
n1
Overall Height
A
.039
.047
Molded Package Thickness
A2
.037
.041
Standoff
A1
.002
.010
Foot Length
L
.018
.030
(F)
Footprint (Reference)
φ
Foot Angle
0
7
Overall Width
E
.463
.482
Overall Length
D
.463
.482
Molded Package Width
E1
.390
.398
Molded Package Length
D1
.390
.398
c
Lead Thickness
.005
.009
Lead Width
B
.007
.011
Pin 1 Corner Chamfer
CH
.025
.045
α
Mold Draft Angle Top
5
15
β
Mold Draft Angle Bottom
5
15
*Controlling Parameter
Notes:
Dimensions D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions
shall not exceed .010" (0.254mm) per side.
MAX
1.20
1.05
0.25
0.75
7
12.25
12.25
10.10
10.10
0.23
0.27
1.14
15
15
JEDEC Equivalent: MS-026
Drawing No. C04-085
DS39747C-page 214
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
80-Lead Plastic Thin Quad Flatpack (PT) 12x12x1 mm Body, 1.0/0.10 mm Lead Form (TQFP)
E
E1
#leads=n1
p
D1
D
2
1
B
n
CH x 45°
A
α
c
φ
β
L
A2
A1
(F)
Units
Dimension Limits
n
p
MIN
INCHES
NOM
80
.020
20
.043
.039
.004
.024
.039
3.5
.551
.551
.472
.472
.006
.009
.035
10
10
MAX
MILLIMETERS*
NOM
80
0.50
20
1.00
1.10
0.95
1.00
0.05
0.10
0.45
0.60
1.00
0
3.5
13.75
14.00
13.75
14.00
11.75
12.00
11.75
12.00
0.09
0.15
0.17
0.22
0.64
0.89
5
10
5
10
MIN
Number of Pins
Pitch
Pins per Side
n1
Overall Height
A
.047
.039
Molded Package Thickness
A2
.037
.041
Standoff
A1
.002
.006
Foot Length
L
.018
.030
(F)
Footprint (Reference)
φ
Foot Angle
0
7
Overall Width
E
.541
.561
Overall Length
D
.541
.561
Molded Package Width
E1
.463
.482
Molded Package Length
D1
.463
.482
c
Lead Thickness
.004
.008
Lead Width
B
.007
.011
Pin 1 Corner Chamfer
CH
.025
.045
α
Mold Draft Angle Top
5
15
β
Mold Draft Angle Bottom
5
15
*Controlling Parameter
Notes:
Dimensions D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions
shall not exceed .010" (0.254mm) per side.
MAX
1.20
1.05
0.15
0.75
7
14.25
14.25
12.25
12.25
0.20
0.27
1.14
15
15
JEDEC Equivalent: MS-026
Drawing No. C04-092
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 215
PIC24FJ128GA FAMILY
100-Lead Plastic Thin Quad Flatpack (PT) 12x12x1 mm Body, 1.0/0.10 mm Lead Form (TQFP)
E
E1
#leads = n1
p
D1
D
2
1
B
n
CH x 45
α
c
A
φ
β
L
Units
Dimension Limits
n
p
A1
A2
F
INCHES
NOM
100
.016 BSC
25
.039
.043
.037
.039
.002
.004
.018
.024
.039 REF.
0°
3.5°
.551 BSC
.551 BSC
.472 BSC
.472 BSC
.004
.006
.005
.007
5°
10°
5°
10°
Preliminary
MAX
MILLIMETERS*
NOM
100
0.40 BSC
25
1.00
1.10
0.95
1.00
0.05
0.10
0.45
0.60
1.00 REF.
0°
3.5°
14.00 BSC
14.00 BSC
12.00 BSC
12.00 BSC
0.09
0.15
0.13
0.18
5°
10°
5°
10°
MAX
Number of Pins
Pitch
Pins per Side
n1
Overall Height
A
.047
1.20
Molded Package Thickness
A2
.041
1.05
Standoff
A1
.006
0.15
Foot Length
L
.030
0.75
Footprint (Reference)
F
φ
Foot Angle
7°
7°
Overall Width
E
Overall Length
D
Molded Package Width
E1
Molded Package Length
D1
c
Lead Thickness
.008
0.20
Lead Width
B
.009
0.23
α
Mold Draft Angle Top
15°
15°
β
15°
15°
Mold Draft Angle Bottom
* Controlling Parameter
Notes:
Dimensions D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.10" (0.254 mm) per side.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
See ASME Y14.5M
REF: Reference Dimension, usually without tolerance, for information purposes only.
See ASME Y14.5M
JEDEC Equivalent: MS-026
Revised 07-22-05
Drawing No. C04-100
DS39747C-page 216
MIN
MIN
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
100-Lead Plastic Thin Quad Flatpack (PF) 14x14x1 mm Body, 1.0/0.10 mm Lead Form (TQFP)
E
E1
#leads=n1
p
D
D1
B
2
1
n
α
A
c
φ
β
L
A2
A1
(F)
Units
Number of Pins
Pitch
Dimension Limits
n
p
INCHES
A
Molded Package Thickness
A2
Standoff
A1
.002
L
(F)
.018
MAX
100
0.50
25
Overall Height
Footprint (Reference)
NOM
.020
n1
§
MIN
100
Pins per Side
Foot Length
MILLIMETERS*
MAX
NOM
MIN
25
.047
.037
1.20
.039
.041
0.95
.006
0.05
.024
.030
0.45
1.00
0.15
0.60
.039
φ
Overall Width
E
.630 BSC
16.00 BSC
Overall Length
D
.630 BSC
16.00 BSC
Molded Package Width
E1
.551 BSC
14.00 BSC
Molded Package Length
D1
c
.551 BSC
Lead Thickness
3.5
.004
0.75
1.00
Foot Angle
0
1.05
7
0
3.5
7
14.00 BSC
.008
0.09
0.20
.007
.009
.011
0.17
0.22
Mold Draft Angle Top
B
α
11
12
13
11
12
13
Mold Draft Angle Bottom
β
11
12
13
11
12
13
Lead Width
0.27
*Controlling Parameter
§ Significant Characteristic
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed
.010” (0.254mm) per side.
JEDEC Equivalent: MS-026
Drawing No. C04-110
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 217
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 218
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
APPENDIX A:
REVISION HISTORY
Revision A (September 2005)
Original data sheet for PIC24FJ128GA family devices.
Revision B (March 2006)
Update of electrical specifications.
Revision C (June 2006)
Update of electrical specifications.
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 219
PIC24FJ128GA FAMILY
NOTES:
DS39747C-page 220
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
INDEX
A
C
A/D Converter ................................................................... 165
AC
Characteristics .......................................................... 208
Internal RC Accuracy ........................................ 210
Load Conditions ........................................................ 208
Temperature and Voltage Specifications .................. 208
Alternate Interrupt Vector Table (AIVT) .............................. 57
Arithmetic Logic Unit (ALU)................................................. 23
Assembler
MPASM Assembler................................................... 198
C Compilers
MPLAB C18.............................................................. 198
MPLAB C30.............................................................. 198
Clock Switching
and Clock Frequency.................................................. 97
Enabling...................................................................... 95
Operation.................................................................... 95
Oscillator Sequence ................................................... 96
Code Examples
Basic Code Sequence for
Clock Switching .................................................. 96
Erasing a Program Memory Block.............................. 48
Initiating a Programming Sequence ........................... 49
Loading Write Buffers ................................................. 49
Port Write/Read ........................................................ 100
PWRSAV Instruction Syntax ...................................... 97
Comparator Module .......................................................... 173
Comparator Voltage Reference ........................................ 177
Configuring ............................................................... 177
Configuration Bits ............................................................. 179
Configuration Register Protection..................................... 187
Configuring Analog Port Pins............................................ 100
Core Features....................................................................... 7
16-bit Architecture ........................................................ 7
Easy Migration.............................................................. 8
Oscillator Options, Features ......................................... 7
Power-Saving Technology............................................ 7
CPU .................................................................................... 19
Control Registers........................................................ 22
Programmer’s Model .................................................. 21
CRC
Example Setup ......................................................... 162
Operation in Power Save Modes.............................. 163
Overview................................................................... 162
Registers .................................................................. 161
User Interface ........................................................... 163
Customer Change Notification Service............................. 225
Customer Notification Service .......................................... 225
Customer Support............................................................. 225
B
Baud Rate Error Calculation (BRGH = 0) ......................... 132
Block Diagrams
10-bit High-Speed A/D Converter ............................. 166
16-bit Timer1 Module ................................................ 101
8-bit Multiplexed Address and
Data Application................................................ 148
Accessing Program Memory with
Table Instructions ............................................... 42
Addressable Parallel Slave Port ............................... 146
Comparator I/O Operating Modes............................. 173
Comparator Voltage Reference ................................ 177
Connections for On-Chip Voltage Regulator............. 185
Device Clock ............................................................... 91
I2C............................................................................. 124
Input Capture ............................................................ 109
LCD Control .............................................................. 148
Legacy Parallel Slave Port........................................ 146
Master Mode, Demultiplexed Addressing ................. 146
Master Mode, Fully Multiplexed Addressing ............. 147
Master Mode, Partially Multiplexed Addressing ........ 147
Multiplexed Addressing Application .......................... 147
Output Compare Module........................................... 113
Parallel EEPROM (Up to 15-bit Address,
16-bit Data) ....................................................... 148
Parallel EEPROM (Up to 15-bit Address,
8-bit Data) ......................................................... 148
Partially Multiplexed Addressing Application ............ 147
PIC24 CPU Core......................................................... 20
PIC24FJ128GA Family (General) ............................... 10
PMP Module ............................................................. 139
Program Space Visibility Operation ............................ 43
Reset System.............................................................. 51
RTCC ........................................................................ 149
Shared Port Structure ................................................. 99
SPI ............................................................................ 116
SPI Master, Frame Master Connection..................... 121
SPI Master, Frame Slave Connection....................... 121
SPI Master/Slave Connection
(Enhanced Buffer Modes) ................................. 120
SPI Master/Slave Connection
(Standard Mode) ............................................... 120
SPI Slave, Frame Master Connection....................... 121
SPI Slave, Frame Slave Connection......................... 121
Timer2 and Timer4 (16-bit Synchronous) ................. 105
Timer2/3 and Timer4/5 (32-bit) ................................. 104
Timer3 and Timer5 (16-bit Asynchronous) ............... 105
UART ........................................................................ 131
Watchdog Timer (WDT) ............................................ 186
Brown-out Reset (BOR)
and On-Chip Voltage Regulator................................ 185
© 2006 Microchip Technology Inc.
D
Data Memory
Address Space ........................................................... 27
Width .................................................................. 27
Memory Map for PIC24F128GA
Family Devices ................................................... 27
Near Data Space ........................................................ 28
Organization and Alignment ....................................... 28
SFR Space ................................................................. 28
Software Stack ........................................................... 40
DC Characteristics............................................................ 202
I/O Pin Input Specifications ...................................... 206
I/O Pin Output Specifications.................................... 207
Idle Current (IIDLE) .................................................... 204
Operating Current (IDD) ............................................ 203
Power-Down Current (IPD)........................................ 205
Program Memory...................................................... 207
Temperature and Voltage Specifications.................. 202
Development Support ....................................................... 197
Preliminary
DS39747C-page 221
PIC24FJ128GA FAMILY
E
M
Electrical Characteristics................................................... 201
Absolute Maximum Ratings ...................................... 201
ENVREG pin ..................................................................... 185
Equations
A/D Conversion Clock Period ................................... 171
Calculating the PWM Period ..................................... 112
Calculation for Maximum PWM Resolution............... 112
Relationship Between Device and
SPI Clock Speed............................................... 122
UART Baud Rate with BRGH = 0 ............................. 132
UART Baud Rate with BRGH = 1 ............................. 132
Errata .................................................................................... 6
Memory Organization ......................................................... 25
Microchip Internet Web Site.............................................. 225
MPLAB ASM30 Assembler, Linker, Librarian ................... 198
MPLAB ICD 2 In-Circuit Debugger ................................... 199
MPLAB ICE 2000 High-Performance
Universal In-Circuit Emulator .................................... 199
MPLAB ICE 4000 High-Performance
Universal In-Circuit Emulator .................................... 199
MPLAB Integrated Development
Environment Software .............................................. 197
MPLAB PM3 Device Programmer .................................... 199
MPLINK Object Linker/MPLIB Object Librarian ................ 198
F
O
Flash Configuration Words.......................................... 26, 179
Flash Program Memory....................................................... 45
Control Registers ........................................................ 46
Operations .................................................................. 46
Programming Algorithm .............................................. 48
RTSP Operation.......................................................... 46
Table Instructions........................................................ 45
FSCM
and Device Resets ...................................................... 54
Delay for Crystal and PLL Clock Sources ................... 55
Open-Drain Configuration................................................. 100
Oscillator Configuration ...................................................... 91
Clock Switching Mode Configuration Bits ................... 92
Control Registers ........................................................ 92
CLKDIV............................................................... 92
OSCCON............................................................ 92
OSCTUN ............................................................ 92
Output Compare ............................................................... 111
Registers .................................................................. 114
I
I/O Ports .............................................................................. 99
Parallel I/O (PIO)......................................................... 99
Write/Read Timing .................................................... 100
I2 C
Clock Rates............................................................... 125
Communicating as Master in a
Single Master Environment............................... 123
Setting Baud Rate When Operating
as Bus Master ................................................... 125
Slave Address Masking ............................................ 125
Implemented Interrupt Vectors (table)................................. 59
In-Circuit Debugger ........................................................... 187
In-Circuit Serial Programming (ICSP) ............................... 187
Input Capture .................................................................... 109
Registers ................................................................... 110
Input Change Notification.................................................. 100
Instruction Set
Overview ................................................................... 191
Summary................................................................... 189
Inter-Integrated Circuit (I2C) ............................................. 123
Internal RC Oscillator
Use with WDT ........................................................... 186
Internet Address................................................................ 225
Interrupt Control and Status Registers................................ 60
IECx ............................................................................ 60
IFSx............................................................................. 60
INTCON1, INTCON2 .................................................. 60
IPCx ............................................................................ 60
Interrupt Controller .............................................................. 57
Interrupt Setup Procedures ................................................. 89
Initialization ................................................................. 89
Interrupt Disable.......................................................... 89
Interrupt Service Routine (ISR) ................................... 89
Trap Service Routine (TSR)........................................ 89
Interrupt Vector Table (IVT) ................................................ 57
Interrupts Coincident with
Power Save Instructions ............................................. 98
DS39747C-page 222
P
Packaging ......................................................................... 213
Details....................................................................... 214
Marking ..................................................................... 213
Pad Configuration Map ....................................................... 37
Parallel Master Port (PMP) ............................................... 139
PICSTART Plus Development Programmer..................... 200
Pinout Descriptions
PIC24FJ128GA Family ............................................... 11
POR and Long Oscillator Start-up Times ........................... 54
Power-on Reset (POR)
and On-Chip Voltage Regulator................................ 185
Power-Saving Features ...................................................... 97
Power-Saving Modes
Doze ........................................................................... 98
Instruction-Based........................................................ 97
Idle...................................................................... 98
Sleep .................................................................. 97
Program Address Space..................................................... 25
Memory Map for PIC24FJ128GA
Family Devices ................................................... 25
Program and Data Memory Spaces
Interfacing ................................................................... 40
Program Memory
Data Access Using Table Instructions ........................ 42
Hard Memory Vectors................................................. 26
Interrupt Vector ........................................................... 26
Organization ............................................................... 26
Reading Data Using Program Space Visibility............ 43
Reset Vector ............................................................... 26
Table Instructions
TBLRDH ............................................................. 42
TBLRDL.............................................................. 42
Program Space
Address Construction ................................................. 41
Addressing.................................................................. 40
Data Access from, Address Generation ..................... 41
Program Verification and Code Protection ....................... 187
Programmer’s Model .......................................................... 19
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
Pulse-Width Modulation Mode .......................................... 112
Duty Cycle................................................................. 112
Period........................................................................ 112
R
Reader Response ............................................................. 226
Register Map
ADC ............................................................................ 35
CPU Core.................................................................... 29
CRC ............................................................................ 39
Dual Comparator......................................................... 38
I2C1 ............................................................................ 33
I2C2 ............................................................................ 33
ICN.............................................................................. 31
Input Capture .............................................................. 32
Interrupt Controller ...................................................... 30
NVM ............................................................................ 39
Output Compare ......................................................... 32
Parallel Master/Slave Port .......................................... 38
PMD ............................................................................ 39
PORTA........................................................................ 35
PORTB........................................................................ 36
PORTC ....................................................................... 36
PORTD ....................................................................... 36
PORTE........................................................................ 37
PORTF........................................................................ 37
PORTG ....................................................................... 37
Real-Time Clock and Calendar................................... 38
SPI1 ............................................................................ 34
SPI2 ............................................................................ 34
System ........................................................................ 39
Timers ......................................................................... 31
UART1 ........................................................................ 34
UART2 ........................................................................ 34
Registers
AD1CHS (A/D Input Select) ...................................... 170
AD1CON1 (A/D Control 1) ........................................ 167
AD1CON2 (A/D Control 2) ........................................ 168
AD1CON3 (A/D Control 3) ........................................ 169
AD1CSSL (A/D Input Scan Select) ........................... 171
AD1PCFG (A/D Port Configuration).......................... 171
ALCFGRPT (Alarm Configuration)............................ 154
ALMINSEC (Alarm Minutes and
Seconds Value) ................................................ 158
ALMTHDY (Alarm Month and Day Value) ................ 157
ALWDHR (Alarm Weekday and
Hours Value) ..................................................... 157
CLKDIV (Clock Divider) .............................................. 94
CMCON (Comparator Control) ................................. 174
CORCON (Core Control) ...................................... 23, 61
CRCCON (CRC Control) .......................................... 161
CVRCON (Comparator Voltage
Reference Control) ........................................... 178
DEVID (Device ID) .................................................... 183
DEVREV (Device Revision) ...................................... 184
Flash Configuration Word 1 ...................................... 180
Flash Configuration Word 2 ...................................... 182
I2CxCON (I2Cx Control)............................................ 126
I2CxMSK (I2Cx Slave Mode
Address Mask) .................................................. 130
I2CxSTAT (I2Cx Status)............................................ 128
ICxCON (Input Capture x Control) ............................ 110
© 2006 Microchip Technology Inc.
IEC0 (Interrupt Enable Control 0) ............................... 69
IEC1 (Interrupt Enable Control 1) ............................... 70
IEC2 (Interrupt Enable Control 2) ............................... 71
IEC3 (Interrupt Enable Control 3) ............................... 72
IEC4 (Interrupt Enable Control 4) ............................... 73
IFS0 (Interrupt Flag Status 0) ..................................... 64
IFS1 (Interrupt Flag Status 1) ..................................... 65
IFS2 (Interrupt Flag Status 2) ..................................... 66
IFS3 (Interrupt Flag Status 3) ..................................... 67
IFS4 (Interrupt Flag Status 4) ..................................... 68
INTCON1 (Interrupt Control 1) ................................... 62
INTCON2 (Interrupt Control 2) ................................... 63
IPC0 (Interrupt Priority Control 0) ............................... 74
IPC1 (Interrupt Priority Control 1) ............................... 75
IPC10 (Interrupt Priority Control 10) ........................... 84
IPC11 (Interrupt Priority Control 11) ........................... 84
IPC12 (Interrupt Priority Control 12) ........................... 85
IPC13 (Interrupt Priority Control 13) ........................... 86
IPC15 (Interrupt Priority Control 15) ........................... 87
IPC16 (Interrupt Priority Control 16) ........................... 88
IPC2 (Interrupt Priority Control 2) ............................... 76
IPC3 (Interrupt Priority Control 3) ............................... 77
IPC4 (Interrupt Priority Control 4) ............................... 78
IPC5 (Interrupt Priority Control 5) ............................... 79
IPC6 (Interrupt Priority Control 6) ............................... 80
IPC7 (Interrupt Priority Control 7) ............................... 81
IPC8 (Interrupt Priority Control 8) ............................... 82
IPC9 (Interrupt Priority Control 9) ............................... 83
MINSEC (Minutes and Seconds Value) ................... 156
MTHDY (Month and Day Value)............................... 155
NVMCON (Flash Memory Control)............................. 47
OCxCON (Output Compare x Control) ..................... 114
OSCCON (Oscillator Control)..................................... 93
OSCTUN (FRC Oscillator Tune) ................................ 95
PADCFG1 (Pad Configuration Control)............ 145, 153
PMADDR (Parallel Port Address)............................. 143
PMCON (Parallel Port Control)................................. 140
PMMODE (Parallel Port Mode) ................................ 142
PMPEN (Parallel Port Enable).................................. 143
PMSTAT (Parallel Port Status)................................. 144
RCFGCAL (RTCC Calibration
and Configuration) ............................................ 151
RCON (Reset Control)................................................ 52
SPIxCON1 (SPIx Control 1) ..................................... 118
SPIxCON2 (SPIx Control 2) ..................................... 119
SPIxSTAT (SPIx Status and Control) ....................... 117
SR (CPU STATUS) .................................................... 22
SR (STATUS in CPU)................................................. 61
T1CON (Timer1 Control) .......................................... 102
Timer3/5 Control)...................................................... 107
TxCON (Timer2/4 Control) ....................................... 106
UxMODE (UARTx Mode) ......................................... 134
UxSTA (UARTx Status and Control) ........................ 136
WKDYHR (Weekday and Hours Value) ................... 156
YEAR (Year Value)................................................... 155
Reset Sequence ................................................................. 57
Resets ................................................................................ 51
Clock Source Selection .............................................. 53
Device Times.............................................................. 53
Revision History................................................................ 219
Preliminary
DS39747C-page 223
PIC24FJ128GA FAMILY
RTCC
Alarm......................................................................... 159
Configuring........................................................ 159
Interrupt............................................................. 159
ALRMVAL Register Mappings .................................. 157
Calibration................................................................. 158
Control Registers ...................................................... 151
Module Registers ...................................................... 150
Mapping ............................................................ 150
RTCVAL Register Mapping....................................... 155
S
Selective Peripheral Module Control................................... 98
Serial Peripheral Interface (SPI) ....................................... 115
Setup for Continuous Output Pulse Generation................ 111
Setup for Single Output Pulse Generation ........................ 111
Software Simulator (MPLAB SIM)..................................... 198
Software Stack Pointer, Frame Pointer
CALL Stack Frame...................................................... 40
Special Features ............................................................... 179
Code Protection ........................................................ 179
Flexible Configuration ............................................... 179
In-Circuit Emulation................................................... 179
In-Circuit Serial Programming (ICSP) ....................... 179
JTAG Boundary Scan Interface ................................ 179
Watchdog Timer (WDT) ............................................ 179
Special Function Register Reset States.............................. 55
Symbols Used in Opcode Descriptions............................. 190
U
UART
Baud Rate Generator (BRG) .................................... 132
Infrared Support........................................................ 133
IrDA
Built-in Encoder and Decoder........................... 133
External Support, Clock Output ........................ 133
Operation of UxCTS and UxRTS
Control Pins ...................................................... 133
Receiving
8-bit or 9-bit Data Mode.................................... 133
Transmitting
8-bit Data Mode ................................................ 133
9-bit Data Mode ................................................ 133
Break and Sync Sequence ............................... 133
Universal Asynchronous Receiver
Transmitter (UART) .................................................. 131
V
VDDCORE/VCAP Pin ........................................................... 185
Voltage Regulator (On-Chip) ............................................ 185
W
Watchdog Timer (WDT).................................................... 186
Control Register........................................................ 186
Programming Considerations ................................... 186
WWW Address ................................................................. 225
WWW, On-Line Support ....................................................... 6
T
Timer1 Module .................................................................. 101
Timer2/3 Module ............................................................... 103
Timer4/5 Module ............................................................... 103
Timing Diagrams
CLKO and I/O ........................................................... 211
External Clock ........................................................... 209
Timing Requirements
Capacitive Loading on Output Pin ............................ 208
CLKO and I/O ........................................................... 211
External Clock ........................................................... 209
Timing Specifications
PLL Clock.................................................................. 210
DS39747C-page 224
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our WWW site at
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Users of Microchip products can receive assistance
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Technical support is available through the web site
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CUSTOMER CHANGE NOTIFICATION
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Microchip’s customer notification service helps keep
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To register, access the Microchip web site at
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© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 225
PIC24FJ128GA 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
can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150.
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Device: PIC24FJ128GA Family
N
Literature Number: DS39747C
Questions:
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2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
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6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
DS39747C-page 226
Preliminary
© 2006 Microchip Technology Inc.
PIC24FJ128GA FAMILY
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 128 GA0 10 T - I / PT - XXX
Examples:
a)
Microchip Trademark
Architecture
Flash Memory Family
b)
Program Memory Size (KB)
Product Group
PIC24FJ128GA008-I/PT 301:
General purpose PIC24, 96 KB program
memory, 80-pin, Industrial temp.,
TQFP package, QTP pattern #301.
PIC24FJ128GA010-I/PT:
General purpose PIC24, 128 KB program
memory, 100-pin, Industrial temp.,
TQFP package.
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
GA0 = General purpose microcontrollers
Pin Count
06
08
10
= 64-pin
= 80-pin
= 100-pin
Temperature Range
I
= -40°C to +85°C (Industrial)
Package
PT
= 64-Lead, 80-Lead, 100-Lead (12x12x1 mm)
TQFP (Thin Quad Flatpack)
= 100-Lead (14x14x1 mm) TQFP (Thin Quad Flatpack)
PF
Pattern
Three-digit QTP, SQTP, Code or Special Requirements
(blank otherwise)
ES = Engineering Sample
© 2006 Microchip Technology Inc.
Preliminary
DS39747C-page 227
PIC24FJ128GA FAMILY
DS39747C-page 228
Preliminary
© 2006 Microchip Technology Inc.
WORLDWIDE SALES AND SERVICE
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Technical Support:
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Suites 3707-14, 37th Floor
Tower 6, The Gateway
Habour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
Atlanta
Alpharetta, GA
Tel: 770-640-0034
Fax: 770-640-0307
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Malaysia - Penang
Tel: 60-4-646-8870
Fax: 60-4-646-5086
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
China - Xian
Tel: 86-29-8833-7250
Fax: 86-29-8833-7256
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Taiwan - Hsin Chu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
San Jose
Mountain View, CA
Tel: 650-215-1444
Fax: 650-961-0286
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
06/08/06
DS39747C-page 228
Preliminary
© 2006 Microchip Technology Inc.
DSTEMP
1.0 Device Overview .......................................................................................................................................................................... 7
2.0 CPU............................................................................................................................................................................................ 19
3.0 Memory Organization ................................................................................................................................................................. 25
4.0 Flash Program Memory.............................................................................................................................................................. 45
5.0 Resets ........................................................................................................................................................................................ 51
6.0 Interrupt Controller ..................................................................................................................................................................... 57
7.0 Oscillator Configuration .............................................................................................................................................................. 91
8.0 Power-Saving Features.............................................................................................................................................................. 97
9.0 I/O Ports ..................................................................................................................................................................................... 99
10.0 Timer1 ...................................................................................................................................................................................... 101
11.0 Timer2/3 and Timer4/5 ............................................................................................................................................................ 103
12.0 Input Capture............................................................................................................................................................................ 109
13.0 Output Compare....................................................................................................................................................................... 111
14.0 Serial Peripheral Interface (SPI™) ........................................................................................................................................... 115
15.0 Inter-Integrated Circuit (I2C™) ................................................................................................................................................. 123
16.0 Universal Asynchronous Receiver Transmitter (UART) ........................................................................................................... 131
17.0 Parallel Master Port.................................................................................................................................................................. 139
18.0 Real-Time Clock and Calendar ................................................................................................................................................ 149
19.0 Programmable Cyclic Redundancy Check (CRC) Generator .................................................................................................. 161
20.0 10-bit High-Speed A/D Converter............................................................................................................................................. 165
21.0 Comparator Module.................................................................................................................................................................. 173
22.0 Comparator Voltage Reference................................................................................................................................................ 177
23.0 Special Features ...................................................................................................................................................................... 179
24.0 Instruction Set Summary .......................................................................................................................................................... 189
25.0 Development Support............................................................................................................................................................... 197
26.0 Electrical Characteristics .......................................................................................................................................................... 201
27.0 Packaging Information.............................................................................................................................................................. 213
Appendix A: Revision History............................................................................................................................................................. 219
Index ................................................................................................................................................................................................. 221
The Microchip Web Site ..................................................................................................................................................................... 225
Customer Change Notification Service .............................................................................................................................................. 225
Customer Support .............................................................................................................................................................................. 225
Reader Response .............................................................................................................................................................................. 226
Product Identification System ............................................................................................................................................................ 227
© 2005 Microchip Technology Inc.
Advance Information
DS00000A-page 1