40001722C

PIC16(L)F1703/7
14/20-Pin 8-Bit Advanced Analog Flash Microcontrollers
Core Features
eXtreme Low-Power (XLP) Features
• C Compiler Optimized RISC Architecture
• Only 49 Instructions
• Operating Speed:
- 0-32 MHz
- 125 ns minimum instruction cycle
• Interrupt Capability
• 16-Level Deep Hardware Stack
• Up to Two 8-Bit Timers
• One 16-bit Timer
• Power-on Reset (POR)
• Power-up Timer (PWRT)
• Low-Power Brown-out Reset (LPBOR)
• Programmable Watchdog Timer (WDT) up to
256s
• Programmable Code Protection
• Sleep mode: 50 nA @ 1.8V, typical
• Watchdog Timer: 500 nA @ 1.8V, typical
• Operating Current:
- 8 uA @ 32 kHz, 1.8V, typical
- 32 uA/MHz @ 1.8V, typical
Memory
•
•
•
•
Two Kwords Flash Program Memory
256 Bytes Data SRAM Memory
Direct, Indirect and Relative Addressing modes
High-Endurance Flash Data Memory (HEF)
- 128 bytes of nonvolatile data storage
- 100k erase/write cycles
Intelligent Analog Peripherals
• Operational Amplifiers:
- Two configurable rail-to-rail Op Amps
- Selectable internal and external channels
- 2 MHz gain bandwidth product
• 10-Bit Analog-to-Digital Converter (ADC):
- Up to 12 external channels
- Conversion available during Sleep
- Temperature Indicator
• Zero-Cross Detector (ZCD):
- Detect when AC signal on pin crosses
ground
Clocking Structure
• 16 MHz Internal Oscillator Block:
- ±1% at calibration
- Selectable frequency range from 0 to 32 MHz
• 31 kHz Low-Power Internal Oscillator
Operating Characteristics
Programming/Debug Features
• Operating Voltage Range:
- 1.8V to 3.6V (PIC16LF1703/7)
- 2.3V to 5.5V (PIC16F1703/7)
• Temperature Range:
- Industrial: -40°C to 85°C
- Extended: -40°C to 125°C
• In-Circuit Debug Integrated On-Chip
• Emulation Header for Advanced Debug:
- Provides trace, background debug and up to
32 hardware break points
• In-Circuit Serial Programming™ (ICSP™) via Two
Pins
Digital Peripherals
• Capture/Compare/PWM (CCP) module
• Serial Communications:
- SPI, I2C
• Up to 18 I/O Pins and One Input Pin:
- Individually programmable weak pull-ups
- Slew rate control
- Interrupt-on-change with edge-select
• Peripheral Pin Select (PPS):
- Enables pin mapping of digital I/O
 2013-2015 Microchip Technology Inc.
DS40001722C-page 1
PIC16(L)F1703/7
Device
Data Sheet Index
Program Memory
Flash (words)
Data SRAM
(bytes)
High-Endurance
Flash (bytes)
I/O’s(2)
10-bit ADC (ch)
8-bit DAC
High-Speed/
Comparators
Op Amp
Zero Cross
Timers
(8/16-bit)
CCP
PWM
COG
EUSART
MSSP (I2C/SPI)
CLC
PPS
Debug(1)
XLP
PIC16(L)F170x Family Types
PIC16(L)F1703
(3)
2048
256
128
12
8
0
0
2
1
2/1
2
0
0
0
1
0
Y
I/E
Y
PIC16(L)F1704
(1)
4096
512
128
12
8
1
2
2
1
4/1
2
2
1
1
1
3
Y
I/E
Y
PIC16(L)F1705
(2)
8192
1024
128
12
8
1
2
2
1
4/1
2
2
1
1
1
3
Y
I/E
Y
PIC16(L)F1707
(3)
2048
256
128
18
12
0
0
2
1
2/1
2
0
0
0
1
0
Y
I/E
Y
PIC16(L)F1708
(1)
4096
512
128
18
12
1
2
2
1
4/1
2
2
1
1
1
3
Y
I/E
Y
PIC16(L)F1709
(2)
8192
1024
128
18
12
1
2
2
1
4/1
2
2
1
1
1
3
Y
I/E
Y
Note 1:
2:
Debugging Methods: (I) – Integrated on Chip; (H) – using Debug Header; E – using Emulation Header.
One pin is input-only.
Data Sheet Index: (Unshaded devices are described in this document.)
1: DS40001715
PIC16(L)F1704/8 Data Sheet, 14/20-Pin Flash, 8-bit Microcontrollers.
2: DS40001729
PIC16(L)F1705/9 Data Sheet, 14/20-Pin Flash, 8-bit Microcontrollers.
3: DS40001722
PIC16(L)F1703/7 Data Sheet, 14/20-Pin Flash, 8-bit Microcontrollers
Note:
For other small form-factor package availability and marking information, please visit
http://www.microchip.com/packaging or contact your local sales office.
DS40001722C-page 2
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Pin Diagrams
FIGURE 1:
14-PIN DIAGRAM FOR PIC16(L)F1703
VDD
RA5
RA4
VPP/MCLR/RA3
RC5
RC4
RC3
FIGURE 2:
1
2
3
4
5
6
7
PIC16(L)F1703
PDIP, SOIC, TSSOP
14
13
12
11
10
9
8
VSS
RA0/ICSPDAT
RA1/ICSPCLK
RA2
RC0
RC1
RC2
16-PIN PACKAGE DIAGRAM FOR PIC16(L)F1703
16 VDD
15 NC
14 NC
13 VSS
QFN
1
12 RA0/ICSPDAT
2
11 RA1/ICSPCLK
3 PIC16(L)F1703 10 RA2
4
9 RC0
RC4
RC3
RC2
RC1
5
6
7
8
RA5
RA4
RA3/MCLR/VPP
RC5
 2013-2015 Microchip Technology Inc.
DS40001722C-page 3
PIC16(L)F1703/7
FIGURE 3:
20-PIN PACKAGE DIAGRAM FOR PIC16(L)F1707
PDIP, SOIC, SSOP
VDD
20
VSS
2
19
RA4
3
18
RA1/ICSPCLK
VPP/MCLR/RA3
4
17
RA2
RC5
5
16
RC0
15
RC1
14
RC2
13
RB4
9
12
RB5
10
11
RB6
RC3
RC6
RC7
RB7
6
7
8
PIC16(L)F1707
RA5
RA0/ICSPDAT
RC4
FIGURE 4:
1
20-PIN PACKAGE DIAGRAM FOR PIC16(L)F1707
20
19
18
17
16
RA4
RA5
VDD
VSS
RA0/ICSPDAT
QFN
1
15 RA1/ICSPCLK
2
14 RA2
3 PIC16(L)F1707 13 RC0
4
12 RC1
5
11 RC2
RC7
RB7
RB6
RB5
RB4
6
7
8
9
10
VPP/MCLR/RA3
RC5
RC4
RC3
RC6
DS40001722C-page 4
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
ADC
Reference
Op Amp
Zero Cross
MSSP
Interrupt
Pull-up
Basic
13
12
AN0
VREF-
—
—
—
—
—
IOC
Y
ICSPDAT
RA1
12
11
AN1
VREF+
—
—
—
—
—
IOC
Y
ICSPCLK
RA2
11
10
AN2
—
—
ZCD
T0CKI(1)
—
—
INT(1)
IOC
Y
—
RA3
4
3
—
—
—
—
—
—
—
IOC
Y
MCLR
VPP
RA4
3
2
AN3
—
—
—
T1G(1)
—
—
IOC
Y
CLKOUT
RA5
2
1
—
—
—
—
T1CKI(1)
—
—
IOC
Y
CLKIN
RC0
10
9
AN4
—
—
SCK(1)
IOC
Y
—
OPA1IN+
—
—
CCP
QFN
RA0
Timers
PDIP/SOIC/TSSOP
14/16-PIN ALLOCATION TABLE (PIC16(L)F1703)
I/O(2)
TABLE 1:
SCL(3)
RC1
9
8
AN5
—
OPA1IN-
—
—
—
SDI(1)
SDA(3)
IOC
Y
—
RC2
8
7
AN6
—
OPA1OUT
—
—
—
—
IOC
Y
—
SS(1)
RC3
7
6
AN7
—
OPA2OUT
—
—
CCP2(1)
IOC
Y
—
RC4
6
5
—
—
OPA2IN-
—
—
—
—
IOC
Y
—
RC5
5
4
—
—
OPA2IN+
—
—
CCP1(1)
—
IOC
Y
—
VDD
1
16
—
—
—
—
—
—
—
—
—
VDD
VSS
14
13
—
—
—
—
—
—
—
—
—
VSS
OUT(2)
Note 1:
2:
3:
(3)
—
—
—
—
—
—
—
CCP1
SDA
—
—
—
—
—
—
—
—
—
—
CCP2
SCL(3)
SCK
—
—
—
—
—
—
—
—
—
—
—
SDO
—
—
—
Default peripheral input. Input can be moved to any other pin with the PPS input selection registers.
All pin digital outputs default to PORT latch data. Any pin can be selected as a peripheral digital output with the PPS
output selection registers.
These peripheral functions are bidirectional. The output pin selections must be the same as the input pin selections.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 5
PIC16(L)F1703/7
Zero Cross
Timers
MSSP
Interrupt
Pull-up
Basic
16
AN0
VREF-
—
—
—
—
—
IOC
Y
ICSPDAT
18
15
AN1
VREF+
—
—
—
—
—
IOC
Y
ICSPCLK
Y
—
RA2
17
14
AN2
—
—
ZCD
RA3
4
1
—
—
—
—
RA4
3
20
AN3
—
—
RA5
2
19
—
—
RB4
13
10
AN10
—
RB5
12
9
AN11
—
RB6
11
8
—
—
CCP
ADC
19
RA1
Op Amp
QFN
RA0
Reference
PDIP/SOIC/
SSOP
20-PIN ALLOCATION TABLE (PIC16(L)F1707)
I/O(2)
TABLE 2:
(1)
T0CKI
(1)
—
—
INT
IOC
—
—
—
IOC
Y
MCLR
VPP
—
T1G(1)
—
—
IOC
Y
CLKOUT
—
—
T1CKI
—
—
IOC
Y
CLKIN
OPA1IN-
—
—
—
SCK(1)
SDA(3)
IOC
Y
—
OPA1IN+
—
—
—
—
IOC
Y
—
—
—
—
—
SDI(1)
SCL(3)
IOC
Y
—
RB7
10
7
—
—
—
—
—
—
—
IOC
Y
—
RC0
16
13
AN4
—
—
—
—
—
—
IOC
Y
—
RC1
15
12
AN5
—
—
—
—
—
—
IOC
Y
—
RC2
14
11
AN6
—
OPA1OUT
—
—
—
—
IOC
Y
—
RC3
7
4
AN7
—
OPA2OUT
—
—
CCP2(1)
—
IOC
Y
—
RC4
6
3
—
IOC
Y
—
—
—
—
—
—
RC5
5
2
—
—
—
—
—
RC6
8
5
AN8
—
OPA2IN-
—
—
RC7
9
6
AN9
—
OPA2IN+
—
—
VDD
1
18
—
—
—
—
—
VSS
20
17
—
—
—
—
—
OUT(2)
Note 1:
2:
3:
—
CCP1
(1)
—
IOC
Y
—
SS(1)
IOC
Y
—
—
—
IOC
Y
—
—
—
—
—
VDD
—
—
—
—
VSS
—
—
—
—
—
—
—
—
CPP1
SDA(3)
—
—
—
—
—
—
—
—
—
—
CPP2
SCL(3)
SCK
—
—
—
—
—
—
—
—
—
—
—
SDO
—
—
—
Default peripheral input. Input can be moved to any other pin with the PPS input selection registers.
All pin digital outputs default to PORT latch data. Any pin can be selected as a peripheral digital output with the PPS
output selection registers.
These peripheral functions are bidirectional. The output pin selections must be the same as the input pin selections.
DS40001722C-page 6
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Table of Contents
1.0 Device Overview .......................................................................................................................................................................... 9
2.0 Enhanced Mid-Range CPU ........................................................................................................................................................ 15
3.0 Memory Organization ................................................................................................................................................................. 17
4.0 Device Configuration .................................................................................................................................................................. 48
5.0 Resets ........................................................................................................................................................................................ 53
6.0 Oscillator Module (with Fail-Safe Clock Monitor) ....................................................................................................................... 61
7.0 Interrupts .................................................................................................................................................................................... 72
8.0 Power-Down Mode (Sleep) ........................................................................................................................................................ 85
9.0 Watchdog Timer (WDT) ............................................................................................................................................................. 89
10.0 Flash Program Memory Control ................................................................................................................................................. 94
11.0 I/O Ports ................................................................................................................................................................................... 110
12.0 Peripheral Pin Select (PPS) Module ........................................................................................................................................ 128
13.0 Interrupt-On-Change ................................................................................................................................................................ 135
14.0 Fixed Voltage Reference (FVR) .............................................................................................................................................. 141
15.0 Temperature Indicator Module ................................................................................................................................................. 143
16.0 Analog-to-Digital Converter (ADC) Module .............................................................................................................................. 145
17.0 Operational Amplifier (OPA) Modules ...................................................................................................................................... 159
18.0 Zero-Cross Detection (ZCD) Module........................................................................................................................................ 162
19.0 Timer0 Module ......................................................................................................................................................................... 166
20.0 Timer1 Module with Gate Control............................................................................................................................................. 169
21.0 Timer2 Module ......................................................................................................................................................................... 180
22.0 Capture/Compare/PWM Modules ............................................................................................................................................ 184
23.0 Master Synchronous Serial Port (MSSP) Module .................................................................................................................... 194
24.0 In-Circuit Serial Programming™ (ICSP™) ............................................................................................................................... 249
25.0 Instruction Set Summary .......................................................................................................................................................... 251
26.0 Electrical Specifications............................................................................................................................................................ 265
27.0 DC and AC Characteristics Graphs and Charts ....................................................................................................................... 293
28.0 Development Support............................................................................................................................................................... 310
29.0 Packaging Information.............................................................................................................................................................. 314
The Microchip Web Site ..................................................................................................................................................................... 335
Customer Change Notification Service .............................................................................................................................................. 335
Customer Support .............................................................................................................................................................................. 335
Product Identification System ............................................................................................................................................................ 336
 2013-2015 Microchip Technology Inc.
DS40001722C-page 7
PIC16(L)F1703/7
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
E-mail at [email protected] We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site; http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
using.
Customer Notification System
Register on our web site at www.microchip.com to receive the most current information on all of our products.
DS40001722C-page 8
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
1.0
DEVICE OVERVIEW
The PIC16(L)F1703/7 are described within this data
sheet. They are available in 14-pin and 20-pin DIP
packages and 16-pin and 20-pin QFN packages.
Figure 1-1 shows a block diagram of the
PIC16(L)F1703/7 devices. Table 1-2 shows the pinout
descriptions.
Reference Table 1-1 for peripherals available per device.
Peripheral
PIC16(L)F1707
DEVICE PERIPHERAL
SUMMARY
PIC16(L)F1703
TABLE 1-1:
Analog-to-Digital Converter (ADC)
●
●
Fixed Voltage Reference (FVR)
●
●
Zero-Cross Detection (ZCD)
●
●
Temperature Indicator
●
●
Capture/Compare/PWM (CCP/ECCP) Modules
CCP1
●
●
CCP2
●
●
MSSP
●
●
Op Amp 1
●
●
Op Amp 2
●
●
Timer0
●
●
Timer1
●
●
Timer2
●
●
Master Synchronous Serial Ports
Op Amp
Timers
 2013-2015 Microchip Technology Inc.
DS40001722C-page 9
PIC16(L)F1703/7
FIGURE 1-1:
PIC16(L)F1703/7 BLOCK DIAGRAM
Program
Flash Memory
RAM
PORTA
PORTB(1)
CLKOUT
Timing
Generation
HFINTOSC/
LFINTOSC
Oscillator
CLKIN
PORTC
CPU
Figure 2-1
MCLR
ZCD
Op Amps
Timer0
Temp.
Indicator
Note
1:
2:
DS40001722C-page 10
ADC
10-Bit
Timer1
FVR
Timer2
MSSP
CCPs
PIC16(L)F1707 only.
See applicable chapters for more information on peripherals.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 1-2:
PIC16(L)F1703 PINOUT DESCRIPTION
Name
Function
RA0/AN0/VREF-/ICSPDAT
RA0
Input
Type
AN
VREF-
AN
ICSPDAT
ST
RA1
Description
TTL/ST CMOS General purpose I/O.
AN0
RA1/AN1/VREF+/ICSPCLK
Output
Type
—
ADC Channel 0 input.
—
ADC Negative Voltage Reference input.
CMOS ICSP™ Data I/O.
TTL/ST CMOS General purpose I/O.
AN1
AN
VREF+
AN
—
ADC Voltage Reference input.
ICSPCLK
ST
—
Serial Programming Clock.
RA2/AN2/ZCD/T0CKI(1)/INT(1)
RA2
AN2
RA3/MCLR/VPP
RA4/AN3/T1G(1)/CLKOUT
TTL/ST CMOS General purpose I/O.
—
ZCD
—
AN
Zero Cross Detection Current Source/Sink.
T0CKI
TTL/ST
—
Timer0 clock input.
INT
TTL/ST
—
External interrupt.
RA3
TTL/ST CMOS General purpose I/O.
ADC Channel 2 input.
MCLR
ST
—
Master Clear with internal pull-up.
VPP
HV
—
Programming voltage.
TTL/ST CMOS General purpose I/O.
AN3
AN
T1G
TTL/ST
CLKOUT
—
RA5
T1CKI
CLKIN
RC0/AN4/OPA1IN+/SCK(1)/SCL(3)
ADC Channel 1 input.
AN
RA4
RA5/T1CKI(1)/CLKIN
—
RC0
—
ADC Channel 3 input.
—
Timer1 gate input.
CMOS FOSC/4 output.
TTL/ST CMOS General purpose I/O.
TTL/ST
—
Timer1 clock input.
TTL/ST
—
External clock input (EC mode).
TTL/ST CMOS General purpose I/O.
AN4
AN
—
ADC Channel 4 input.
OPA1IN+
AN
—
Operational Amplifier 1 non-inverting input.
SCK
ST
—
SPI clock.
SCL
I2C
—
I2C clock.
RC1/AN5/OPA1IN-/SDI(1)/SDA(3)
RC1
AN5
TTL/ST CMOS General purpose I/O.
AN
—
ADC Channel 5 input.
OPA1IN-
AN
—
Operational Amplifier 1 inverting input.
SDI
CMOS
—
SPI data input.
SDA
I2C
—
I2C data input.
RC2/AN6/OPA1OUT
RC2
TTL/ST CMOS General purpose I/O.
AN6
AN
—
ADC Channel 6 input.
OPA1OUT
—
AN
Operational Amplifier 1 output.
Legend: AN = Analog input or output CMOS = CMOS compatible input or output
OD = Open Drain
TTL = TTL compatible input ST
= Schmitt Trigger input with CMOS levels I2C = Schmitt Trigger input with I2C
HV = High Voltage
Note 1: Default peripheral input. Input can be moved to any other pin with the PPS input selection registers. See Register 12-1.
2: All pin outputs default to PORT latch data. Any pin can be selected as a digital peripheral output with the PPS output
selection registers. See Register 12-3.
3: These I2C functions are bidirectional. The output pin selections must be the same as the input pin selections.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 11
PIC16(L)F1703/7
TABLE 1-2:
PIC16(L)F1703 PINOUT DESCRIPTION (CONTINUED)
Name
Function
RC3/AN7/OPA2OUT/CCP2(1)/SS(1)
RC3
RC4/OPA2IN-
VDD
VSS
OUT(2)
Output
Type
Description
TTL/ST CMOS General purpose I/O.
AN7
AN
—
ADC Channel 7 input.
OPA2OUT
—
AN
Operational Amplifier 2 output.
CCP2
TTL/ST
—
Capture/Compare/PWM2.
SS
TTL/ST
—
Slave Select input.
RC4
OPA2IN-
RC5/OPA2IN+/CCP1(1)
Input
Type
RC5
TTL/ST CMOS General purpose I/O.
AN
—
Operational Amplifier 2 inverting input.
TTL/ST CMOS General purpose I/O.
OPA2IN+
AN
—
CCP1
TTL/ST
—
Capture/Compare/PWM1.
VDD
Power
—
Positive supply.
VSS
Power
—
Ground reference.
CCP1
—
CMOS Capture/Compare/PWM1 output.
CCP2
—
CMOS Capture/Compare/PWM2 output.
SDA(3)
—
OD
Operational Amplifier 2 non-inverting input.
I2C data input/output.
SDO
—
CMOS SPI data output.
SCK
—
CMOS SPI clock output.
SCL(3)
—
OD
I2C clock output.
Legend: AN = Analog input or output CMOS = CMOS compatible input or output
OD = Open Drain
TTL = TTL compatible input ST
= Schmitt Trigger input with CMOS levels I2C = Schmitt Trigger input with I2C
HV = High Voltage
Note 1: Default peripheral input. Input can be moved to any other pin with the PPS input selection registers. See Register 12-1.
2: All pin outputs default to PORT latch data. Any pin can be selected as a digital peripheral output with the PPS output
selection registers. See Register 12-3.
3: These I2C functions are bidirectional. The output pin selections must be the same as the input pin selections.
DS40001722C-page 12
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 1-3:
PIC16(L)F1707 PINOUT DESCRIPTION
Name
RA0/AN0/VREF-/ICSPDAT
RA1/AN1/VREF+/ICSPCLK
RA2/AN2/ZCD/
T0CKI(1)/INT(1)
Function
RA0
AN
VREF-
AN
ICSPDAT
ST
RA1
RA4/AN3/T1G(1)/CLKOUT
RA5/T1CKI/CLKIN
—
ADC Negative Voltage Reference input.
CMOS ICSP™ Data I/O.
TTL/ST CMOS General purpose I/O.
VREF+
AN
—
ADC Voltage Reference input.
ST
—
Serial Programming Clock.
RA2
AN2
—
ADC Channel 1 input.
TTL/ST CMOS General purpose I/O.
AN
—
ZCD
—
AN
Zero-Cross Detection Current Source/Sink.
T0CKI
ST
—
Timer0 clock input.
ST
—
External interrupt.
RA3
ADC Channel 2 input.
TTL/ST CMOS General purpose I/O.
MCLR
ST
—
Master Clear with internal pull-up.
VPP
HV
—
Programming voltage.
RA4
TTL/ST CMOS General purpose I/O.
AN3
AN
T1G
ST
CLKOUT
—
RA5
RB4
—
ADC Channel 3 input.
—
Timer1 gate input.
CMOS FOSC/4 output.
TTL/ST CMOS General purpose I/O.
ST
—
Timer1 clock input.
ST
—
External clock input (EC mode).
TTL/ST CMOS General purpose I/O.
AN10
AN
—
ADC Channel 10 input.
OPA1IN-
AN
—
Operational Amplifier 1 inverting input.
SCK
ST
SDA
I2C
RB5
OPA1IN+
RB7
ADC Channel 0 input.
ICSPCLK
AN11
RB6/SDI(1)/SCL(3)
—
AN
CLKIN
RB5/AN11/OPA1IN+
Description
AN1
T1CKI
RB4/AN10/OPA1IN-/SCK(1)/
SDA(3)
Output
Type
TTL/ST CMOS General purpose I/O.
AN0
INT
RA3/MCLR/VPP
Input
Type
CMOS SPI clock.
OD
I2C data input/output.
TTL/ST CMOS General purpose I/O.
AN
—
ADC Channel 11 input.
AN
—
Operational Amplifier 1 non-inverting input.
RB6
TTL/ST CMOS General purpose I/O.
SDI
CMOS
—
SPI data input.
SCL
I2C
OD
I2C clock.
RB7
TTL/ST CMOS General purpose I/O.
Legend: AN = Analog input or output CMOS = CMOS compatible input or output
OD = Open Drain
TTL = TTL compatible input ST
= Schmitt Trigger input with CMOS levels I2C = Schmitt Trigger input with I2C
HV = High Voltage
Note 1: Default peripheral input. Input can be moved to any other pin with the PPS input selection registers. See Register 12-2.
2: All pin outputs default to PORT latch data. Any pin can be selected as a digital peripheral output with the PPS output
selection registers. See Register 12-3.
3: These I2C functions are bidirectional. The output pin selections must be the same as the input pin selections.
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DS40001722C-page 13
PIC16(L)F1703/7
TABLE 1-3:
PIC16(L)F1707 PINOUT DESCRIPTION (CONTINUED)
Name
Function
RC0/AN4
RC0
RC1/AN5
RC1
RC2/AN6/OPA1OUT
RC2
AN4
AN5
RC3/AN7/OPA2OUT/CCP2(1)
Input
Type
Output
Type
Description
TTL/ST CMOS General purpose I/O.
AN
—
ADC Channel 4 input.
TTL/ST CMOS General purpose I/O.
AN
—
ADC Channel 5 input.
TTL/ST CMOS General purpose I/O.
AN6
AN
—
ADC Channel 6 input.
OPA1OUT
—
AN
Operational Amplifier 1 output.
RC3
AN7
TTL/ST CMOS General purpose I/O.
AN
OPA2OUT
—
CCP2
ST
—
ADC Channel 7 input.
AN
Operational Amplifier 2 output.
CMOS Capture/Compare/PWM2.
RC4
RC4
TTL/ST CMOS General purpose I/O.
RC5/CCP1(1)
RC5
TTL/ST CMOS General purpose I/O.
CCP1
RC6/AN8/OPA2IN-/SS(1)
RC6
CMOS Capture/Compare/PWM1.
AN8
AN
—
ADC Channel 8 input.
OPA2IN-
AN
—
Operational Amplifier 2 inverting input.
ST
—
Slave Select input.
SS
RC7/AN9/OPA2IN+
ST
TTL/ST CMOS General purpose I/O.
RC7
TTL/ST CMOS General purpose I/O.
AN9
AN
—
ADC Channel 9 input.
OPA2IN+
AN
—
Operational Amplifier 2 non-inverting input.
VDD
VDD
Power
—
Positive supply.
VSS
VSS
Power
—
Ground reference.
CCP1
—
CMOS Capture/Compare/PWM1 output.
CCP2
—
CMOS Capture/Compare/PWM2 output.
(3)
—
OUT(2)
SDA
OD
I2C data input/output.
SDO
—
CMOS SPI data output.
SCK
—
CMOS SPI clock output.
SCL(3)
I2C
OD
I2C clock output.
Legend: AN = Analog input or output CMOS = CMOS compatible input or output
OD = Open Drain
TTL = TTL compatible input ST
= Schmitt Trigger input with CMOS levels I2C = Schmitt Trigger input with I2C
HV = High Voltage
Note 1: Default peripheral input. Input can be moved to any other pin with the PPS input selection registers. See Register 12-2.
2: All pin outputs default to PORT latch data. Any pin can be selected as a digital peripheral output with the PPS output
selection registers. See Register 12-3.
3: These I2C functions are bidirectional. The output pin selections must be the same as the input pin selections.
DS40001722C-page 14
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PIC16(L)F1703/7
2.0
Relative addressing modes are available. Two File
Select Registers (FSRs) provide the ability to read
program and data memory.
ENHANCED MID-RANGE CPU
This family of devices contain an enhanced mid-range
8-bit CPU core. The CPU has 49 instructions. Interrupt
capability includes automatic context saving. The
hardware stack is 16 levels deep and has Overflow and
Underflow Reset capability. Direct, Indirect, and
FIGURE 2-1:
•
•
•
•
Automatic Interrupt Context Saving
16-level Stack with Overflow and Underflow
File Select Registers
Instruction Set
CORE BLOCK DIAGRAM
15
Configuration
15
MUX
Flash
Program
Memory
Program
Bus
16-Level
8 Level Stack
Stack
(13-bit)
(15-bit)
14
Instruction
Instruction Reg
reg
8
Data Bus
Program Counter
RAM
Program Memory
Read (PMR)
12
RAM Addr
Addr MUX
Direct Addr 7
5
Indirect
Addr
12
12
BSR
FSR Reg
reg
15
FSR0reg
Reg
FSR
FSR1
Reg
FSR reg
15
STATUS Reg
reg
STATUS
8
3
Power-up
Timer
CLKIN
CLKOUT
Instruction
Decodeand
&
Decode
Control
Timing
Generation
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
MUX
ALU
8
W reg
Internal
Oscillator
Block
VDD
 2013-2015 Microchip Technology Inc.
VSS
DS40001722C-page 15
PIC16(L)F1703/7
2.1
Automatic Interrupt Context
Saving
During interrupts, certain registers are automatically
saved in shadow registers and restored when returning
from the interrupt. This saves stack space and user
code. See Section 7.5 “Automatic Context Saving”
for more information.
2.2
16-Level Stack with Overflow and
Underflow
These devices have a hardware stack memory 15 bits
wide and 16 words deep. A Stack Overflow or Underflow will set the appropriate bit (STKOVF or STKUNF)
in the PCON register, and if enabled, will cause a software Reset. See Section 3.6 “Stack” for more details.
2.3
File Select Registers
There are two 16-bit File Select Registers (FSR). FSRs
can access all file registers and program memory,
which allows one Data Pointer for all memory. When an
FSR points to program memory, there is one additional
instruction cycle in instructions using INDF to allow the
data to be fetched. General purpose memory can now
also be addressed linearly, providing the ability to
access contiguous data larger than 80 bytes. There are
also new instructions to support the FSRs. See
Section 3.7 “Indirect Addressing” for more details.
2.4
Instruction Set
There are 49 instructions for the enhanced mid-range
CPU to support the features of the CPU. See
Section 25.0 “Instruction Set Summary” for more
details.
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PIC16(L)F1703/7
3.0
MEMORY ORGANIZATION
These devices contain the following types of memory:
• Program Memory
- Configuration Words
- Device ID
- User ID
- Flash Program Memory
• Data Memory
- Core Registers
- Special Function Registers
- General Purpose RAM
- Common RAM
implemented for the PIC16(L)F1703/7 family. Accessing
a location above these boundaries will cause a
wrap-around within the implemented memory space.
The Reset vector is at 0000h and the interrupt vector is
at 0004h (see Figure 3-1).
3.2
Note 1: The method to access Flash memory
through the PMCON registers is described
in Section 10.0 “Flash Program Memory
Control”.
High-Endurance Flash
This device has a 128-byte section of high-endurance
Program Flash Memory (PFM) in lieu of data EEPROM.
This area is especially well suited for non-volatile data
storage that is expected to be updated frequently over
the life of the end product. See Section 10.2 “Flash
Program Memory Overview” for more information on
writing data to PFM. See Section 3.2.1.2 “Indirect
Read with FSR” for more information about using the
FSR registers to read byte data stored in PFM.
The following features are associated with access and
control of program memory and data memory:
• PCL and PCLATH
• Stack
• Indirect Addressing
3.1
Program Memory Organization
The enhanced mid-range core has a 15-bit program
counter capable of addressing a 32K x 14 program
memory space. Table 3-1 shows the memory sizes
TABLE 3-1:
DEVICE SIZES AND ADDRESSES
Device
Program Memory
Space (Words)
Last Program Memory
Address
High-Endurance Flash
Memory Address Range (1)
2,048
07FFh
0780h-07FFh
PIC16(L)F1703/7
Note 1: High-endurance Flash applies to low byte of each address in the range.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 17
PIC16(L)F1703/7
FIGURE 3-1:
PROGRAM MEMORY MAP
AND STACK FOR
PIC16(L)F1703/7
PC<14:0>
CALL, CALLW
RETURN, RETLW
Interrupt, RETFIE
15
READING PROGRAM MEMORY AS
DATA
There are two methods of accessing constants in
program memory. The first method is to use tables of
RETLW instructions. The second method is to set an
FSR to point to the program memory.
3.2.1.1
RETLW Instruction
Stack Level 0
Stack Level 1
The RETLW instruction can be used to provide access
to tables of constants. The recommended way to create
such a table is shown in Example 3-1.
Stack Level 15
EXAMPLE 3-1:
Reset Vector
0000h
Interrupt Vector
0004h
0005h
On-chip
Program
Memory
3.2.1
Page 0
07FFh
0800h
constants
BRW
RETLW
RETLW
RETLW
RETLW
DATA0
DATA1
DATA2
DATA3
RETLW INSTRUCTION
;Add Index in W to
;program counter to
;select data
;Index0 data
;Index1 data
my_function
;… LOTS OF CODE…
MOVLW
DATA_INDEX
call constants
;… THE CONSTANT IS IN W
The BRW instruction makes this type of table very
simple to implement. If your code must remain portable
with previous generations of microcontrollers, then the
BRW instruction is not available so the older table read
method must be used.
3.2.1.2
Rollover to Page 1
7FFFh
Indirect Read with FSR
The program memory can be accessed as data by
setting bit 7 of the FSRxH register and reading the
matching INDFx register. The MOVIW instruction will
place the lower eight bits of the addressed word in the
W register. Writes to the program memory cannot be
performed via the INDF registers. Instructions that
access the program memory via the FSR require one
extra instruction cycle to complete. Example 3-2
demonstrates accessing the program memory via an
FSR.
The high directive will set bit<7> if a label points to a
location in program memory.
DS40001722C-page 18
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
EXAMPLE 3-2:
ACCESSING PROGRAM
MEMORY VIA FSR
constants
RETLW DATA0
;Index0 data
RETLW DATA1
;Index1 data
RETLW DATA2
RETLW DATA3
my_function
;… LOTS OF CODE…
MOVLW
LOW constants
MOVWF
FSR1L
MOVLW
HIGH constants
MOVWF
FSR1H
MOVIW
0[FSR1]
;THE PROGRAM MEMORY IS IN W
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DS40001722C-page 19
PIC16(L)F1703/7
3.3
Data Memory Organization
The data memory is partitioned in 32 memory banks
with 128 bytes in a bank. Each bank consists of
(Figure 3-2):
•
•
•
•
12 core registers
20 Special Function Registers (SFR)
Up to 80 bytes of General Purpose RAM (GPR)
16 bytes of common RAM
The active bank is selected by writing the bank number
into the Bank Select Register (BSR). Unimplemented
memory will read as ‘0’. All data memory can be
accessed either directly (via instructions that use the
file registers) or indirectly via the two File Select
Registers (FSR). See Section 3.7 “Indirect
Addressing” for more information.
Data memory uses a 12-bit address. The upper five bits
of the address define the Bank address and the lower
seven bits select the registers/RAM in that bank.
DS40001722C-page 20
3.3.1
CORE REGISTERS
The core registers contain the registers that directly
affect the basic operation. The core registers occupy
the first 12 addresses of every data memory bank
(addresses x00h/x08h through x0Bh/x8Bh). These
registers are listed below in Table 3-2. For detailed
information, see Table 3-9.
TABLE 3-2:
CORE REGISTERS
Addresses
BANKx
x00h or x80h
x01h or x81h
x02h or x82h
x03h or x83h
x04h or x84h
x05h or x85h
x06h or x86h
x07h or x87h
x08h or x88h
x09h or x89h
x0Ah or x8Ah
x0Bh or x8Bh
INDF0
INDF1
PCL
STATUS
FSR0L
FSR0H
FSR1L
FSR1H
BSR
WREG
PCLATH
INTCON
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
3.3.1.1
STATUS Register
The STATUS register, shown in Register 3-1, contains:
• the arithmetic status of the ALU
• the Reset status
The STATUS register can be the destination for any
instruction, like any other register. If the STATUS
register is the destination for an instruction that affects
the Z, DC or C bits, then the write to these three bits is
disabled. These bits are set or cleared according to the
device logic. Furthermore, the TO and PD bits are not
writable. Therefore, the result of an instruction with the
STATUS register as destination may be different than
intended.
3.4
For example, CLRF STATUS will clear the upper three
bits and set the Z bit. This leaves the STATUS register
as ‘000u u1uu’ (where u = unchanged).
It is recommended, therefore, that only BCF, BSF,
SWAPF and MOVWF instructions are used to alter the
STATUS register, because these instructions do not
affect any Status bits. For other instructions not
affecting any Status bits (Refer to Section 25.0
“Instruction Set Summary”).
Note:
The C and DC bits operate as Borrow and
Digit Borrow out bits, respectively, in
subtraction.
Register Definitions: Status
REGISTER 3-1:
STATUS: STATUS REGISTER
U-0
U-0
U-0
R-1/q
R-1/q
R/W-0/u
R/W-0/u
R/W-0/u
—
—
—
TO
PD
Z
DC(1)
C(1)
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = Value depends on condition
bit 7-5
Unimplemented: Read as ‘0’
bit 4
TO: Time-Out bit
1 = After power-up, CLRWDT instruction or SLEEP instruction
0 = A WDT Time-out occurred
bit 3
PD: Power-Down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
bit 2
Z: Zero bit
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is not zero
bit 1
DC: Digit Carry/Digit Borrow bit (ADDWF, ADDLW, SUBLW, SUBWF instructions)(1)
1 = A carry-out from the 4th low-order bit of the result occurred
0 = No carry-out from the 4th low-order bit of the result
bit 0
C: Carry/Borrow bit(1) (ADDWF, ADDLW, SUBLW, SUBWF instructions)(1)
1 = A carry-out from the Most Significant bit of the result occurred
0 = No carry-out from the Most Significant bit of the result occurred
Note 1:
For Borrow, the polarity is reversed. A subtraction is executed by adding the two’s complement of the
second operand.
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PIC16(L)F1703/7
3.4.1
SPECIAL FUNCTION REGISTER
The Special Function Registers are registers used by
the application to control the desired operation of
peripheral functions in the device. The Special Function
Registers occupy the 20 bytes after the core registers of
every data memory bank (addresses x0Ch/x8Ch
through x1Fh/x9Fh). The registers associated with the
operation of the peripherals are described in the
appropriate peripheral chapter of this data sheet.
3.4.2
FIGURE 3-2:
7-bit Bank Offset
0Bh
0Ch
GENERAL PURPOSE RAM
Core Registers
(12 bytes)
Special Function Registers
(20 bytes maximum)
1Fh
20h
Linear Access to GPR
The general purpose RAM can be accessed in a
non-banked method via the FSRs. This can simplify
access to large memory structures. See Section 3.7.2
“Linear Data Memory” for more information.
3.4.3
Memory Region
00h
There are up to 80 bytes of GPR in each data memory
bank. The Special Function Registers occupy the 20
bytes after the core registers of every data memory
bank (addresses x0Ch/x8Ch through x1Fh/x9Fh).
3.4.2.1
BANKED MEMORY
PARTITIONING
General Purpose RAM
(80 bytes maximum)
COMMON RAM
There are 16 bytes of common RAM accessible from all
banks.
6Fh
70h
Common RAM
(16 bytes)
7Fh
3.4.4
DEVICE MEMORY MAPS
The memory maps for the device family are as shown
in Tables 3-3 through 3-8.
DS40001722C-page 22
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
TABLE 3-3:
PIC16(L)F1703/7 MEMORY MAP (BANKS 0-7)
BANK 0
000h
BANK 1
080h
Core Registers
(Table 3-2)
00Bh
00Ch
00Dh
00Eh
00Fh
010h
011h
012h
013h
014h
015h
016h
017h
018h
019h
01Ah
01Bh
01Ch
01Dh
01Eh
01Fh
PORTA
PORTB
PORTC
—
—
PIR1
PIR2
PIR3
—
TMR0
TMR1L
TMR1H
T1CON
T1GCON
TMR2
PR2
T2CON
—
—
—
020h
Core Registers
(Table 3-2)
08Bh
08Ch
08Dh
08Eh
08Fh
090h
091h
092h
093h
094h
095h
096h
097h
098h
099h
09Ah
09Bh
09Ch
09Dh
09Eh
09Fh
BANK 3
180h
Core Registers
(Table 3-2)
10Bh
10Ch
10Dh
10Eh
10Fh
110h
111h
112h
113h
114h
115h
116h
117h
118h
119h
11Ah
11Bh
11Ch
11Dh
11Eh
11Fh
LATA
LATB
LATC
—
—
—
—
—
—
—
BORCON
FVRCON
—
—
—
—
ZCD1CON
—
—
—
120h
General Purpose
Register
80 Bytes
General Purpose
Register
80 Bytes
BANK 4
200h
Core Registers
(Table 3-2)
18Bh
18Ch
18Dh
18Eh
18Fh
190h
191h
191h
192h
193h
194h
195h
196h
197h
198h
199h
19Ah
19Bh
19Ch
19Dh
19Eh
19Fh
1A0h
Core Registers
(Table 3-2)
ANSELA
ANSELB
ANSELC
—
—
PMADR
PMADRL
PMADRH
PMDATL
PMDATH
PMCON1
PMCON2
—
—
—
—
—
—
—
—
20Bh
20Ch
20Dh
20Eh
20Fh
210h
211h
212h
213h
214h
215h
216h
217h
218h
219h
21Ah
21Bh
21Ch
21Dh
21Eh
21Fh
—
220h
16Fh
1EFh
26Fh
0F0h
170h
1F0h
270h
Accesses
70h - 7Fh
0FFh
Accesses
70h - 7Fh
17Fh
Accesses
70h - 7Fh
1FFh
WPUA
WPUB
WPUC
—
—
SSP1BUF
SSP1ADD
SSP1MSK
SSP1STAT
SSP1CON1
SSP1CON1
SSP1CON2
SSP1CON3
—
—
—
—
—
—
—
28Bh
28Ch
28Dh
28Eh
28Fh
290h
291h
292h
293h
294h
295h
296h
297h
298h
298h
299h
29Ah
29Bh
29Ch
29Dh
29Eh
29Fh
2A0h
27Fh
30Bh
30Ch
30Dh
30Eh
30Fh
310h
311h
312h
313h
314h
315h
316h
317h
318h
319h
31Ah
31Bh
31Ch
31Dh
31Eh
31Fh
—
320h
2FFh
SLRCONA
SLRCONB
SLRCONC
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Core Registers
(Table 3-2)
38Bh
38Ch
38Dh
38Eh
38Fh
390h
391h
392h
393h
394h
395h
396h
397h
398h
399h
39Ah
39Bh
39Ch
39Dh
39Eh
39Fh
36Fh
370h
Accesses
70h - 7Fh
Unimplemented
3EFh
3F0h
Accesses
70h - 7Fh
37Fh
INLVLA
INLVLB
INLVLC
—
—
IOCAP
IOCAN
IOCAF
IOCBP
IOCBN
IOCBF
IOCCP
IOCCN
IOCCF
—
—
—
—
—
—
3A0h
Unimplemented
Unimplemented
2F0h
BANK 7
380h
Core Registers
(Table 3-2)
ODCONA
ODCONB
ODCONC
—
—
CCPR1L
CCPR1H
CCP1CON
—
—
—
—
CCPR2
CCPR2L
CCPR2H
CCP2CON
—
—
—
—
2EFh
Accesses
70h - 7Fh
BANK 6
300h
Core Registers
(Table 3-2)
Unimplemented
Unimplemented
0EFh
Common RAM
70h - 7Fh
BANK 5
280h
Accesses
70h - 7Fh
3FFh
DS40001722C-page 23
PIC16(L)F1703/7
General Purpose
Register
80 Bytes
07Fh
TRISA
TRISB
TRISC
—
—
PIE1
PIE2
PIE3
—
OPTION_REG
PCON
WDTCON
OSCTUNE
OSCCON
OSCSTAT
ADRESL
ADRESH
ADCON0
ADCON1
ADCON2
0A0h
06Fh
070h
BANK 2
100h
PIC16(L)F1703/7 MEMORY MAP (BANKS 8-15)
BANK 8
400h
BANK 9
480h
Core Registers
(Table 3-2)
40Bh
40Ch
40Dh
40Eh
40Fh
410h
411h
412h
413h
414h
415h
416h
417h
418h
419h
41Ah
41Bh
41Ch
41Dh
41Eh
41Fh
420h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Core Registers
(Table 3-2)
48Bh
48Ch
48Dh
48Eh
48Fh
490h
491h
492h
493h
494h
495h
496h
497h
498h
499h
49Ah
49Bh
49Ch
49Dh
49Eh
49Fh
4A0h
4EFh
4F0h
Accesses
70h - 7Fh
 2013-2015 Microchip Technology Inc.
47Fh
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
50Bh
50Ch
50Dh
50Eh
50Fh
510h
511h
512h
513h
514h
515h
516h
517h
518h
519h
51Ah
51Bh
51Ch
51Dh
51Eh
51Fh
520h
—
—
—
—
—
OPA1CON
—
—
—
OPA2CON
—
—
—
—
—
—
—
—
—
—
56Fh
570h
58Bh
58Ch
58Dh
58Eh
58Fh
590h
591h
592h
593h
594h
595h
596h
597h
598h
599h
59Ah
59Bh
59Ch
59Dh
59Eh
59Fh
5A0h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
5EFh
5F0h
60Bh
60Ch
60Dh
60Eh
60Fh
610h
611h
612h
613h
614h
615h
616h
617h
618h
619h
61Ah
61Bh
61Ch
61Dh
61Eh
61Fh
620h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
66Fh
670h
68Bh
68Ch
68Dh
68Eh
68Fh
690h
691h
692h
693h
694h
695h
696h
697h
698h
699h
69Ah
69Bh
69Ch
69Dh
69Eh
69Fh
6A0h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
6EFh
6F0h
70Bh
70Ch
70Dh
70Eh
70Fh
710h
711h
712h
713h
714h
715h
716h
717h
718h
719h
71Ah
71Bh
71Ch
71Dh
71Eh
71Fh
720h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Core Registers
(Table 3-2)
78Bh
78Ch
78Dh
78Eh
78Fh
790h
791h
792h
793h
794h
795h
796h
797h
798h
799h
79Ah
79Bh
79Ch
79Dh
79Eh
79Fh
7A0h
Unimplemented
76Fh
770h
Accesses
70h - 7Fh
6FFh
BANK 15
780h
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
67Fh
BANK 14
700h
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
5FFh
BANK 13
680h
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
57Fh
BANK 12
600h
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
4FFh
BANK 11
580h
Core Registers
(Table 3-2)
Unimplemented
Unimplemented
46Fh
470h
BANK 10
500h
Unimplemented
7EFh
7F0h
Accesses
70h - 7Fh
77Fh
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Accesses
70h - 7Fh
7FFh
PIC16(L)F1703/7
DS40001722C-page 24
TABLE 3-4:
 2013-2015 Microchip Technology Inc.
TABLE 3-5:
PIC16(L)F1703/7 MEMORY MAP (BANKS 16-23)
BANK 16
800h
BANK 17
80Bh
80Ch
80Dh
80Eh
80Fh
810h
811h
812h
813h
814h
815h
816h
817h
818h
819h
81Ah
81Bh
81Ch
81Dh
81Eh
81Fh
820h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Core Registers
(Table 3-2)
88Bh
88Ch
88Dh
88Eh
88Fh
890h
891h
892h
893h
894h
895h
896h
897h
898h
899h
89Ah
89Bh
89Ch
89Dh
89Eh
89Fh
8A0h
Unimplemented
90Bh
90Ch
90Dh
90Eh
90Fh
910h
911h
912h
913h
914h
915h
916h
917h
918h
919h
91Ah
91Bh
91Ch
91Dh
91Eh
91Fh
920h
Unimplemented
8EFh
8F0h
Accesses
70h - 7Fh
87Fh
Core Registers
(Table 3-2)
98Bh
98Ch
98Dh
98Eh
98Fh
990h
991h
992h
993h
994h
995h
996h
997h
998h
999h
99Ah
99Bh
99Ch
99Dh
99Eh
99Fh
9A0h
Core Registers
(Table 3-2)
A0Bh
A0Ch
A0Dh
A0Eh
A0Fh
A10h
A11h
A12h
A13h
A14h
A15h
A16h
A17h
A18h
A19h
A1Ah
A1Bh
A1Ch
A1Dh
A1Eh
A1Fh
A20h
Unimplemented
9EFh
9F0h
96Fh
970h
Accesses
70h - 7Fh
97Fh
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
A8Bh
A8Ch
A8Dh
A8Eh
A8Fh
A90h
A91h
A92h
A93h
A94h
A95h
A96h
A97h
A98h
A99h
A9Ah
A9Bh
A9Ch
A9Dh
A9Eh
A9Fh
AA0h
Core Registers
(Table 3-2)
B0Bh
B0Ch
B0Dh
B0Eh
B0Fh
B10h
B11h
B12h
B13h
B14h
B15h
B16h
B17h
B18h
B19h
B1Ah
B1Bh
B1Ch
B1Dh
B1Eh
B1Fh
B20h
Unimplemented
Accesses
70h - 7Fh
A7Fh
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Core Registers
(Table 3-2)
B8Bh
B8Ch
B8Dh
B8Eh
B8Fh
B90h
B91h
B92h
B93h
B94h
B95h
B96h
B97h
B98h
B99h
B9Ah
B9Bh
B9Ch
B9Dh
B9Eh
B9Fh
BA0h
Unimplemented
Unimplemented
Accesses
70h - 7Fh
B7Fh
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
BEFh
BF0h
B6Fh
B70h
Accesses
70h - 7Fh
AFFh
BANK 23
B80h
B00h
AEFh
AF0h
A6Fh
A70h
BANK 22
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
9FFh
BANK 21
A80h
A00h
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
8FFh
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
BANK 20
Accesses
70h - 7Fh
BFFh
DS40001722C-page 25
PIC16(L)F1703/7
86Fh
870h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
BANK 19
980h
900h
880h
Core Registers
(Table 3-2)
BANK 18
PIC16(L)F1703/7 MEMORY MAP (BANKS 24-31)
BANK 24
C00h
BANK 25
C80h
Core Registers
(Table 3-2)
C0Bh
C0Ch
C0Dh
C0Eh
C0Fh
C10h
C11h
C12h
C13h
C14h
C15h
C16h
C17h
C18h
C19h
C1Ah
C1Bh
C1Ch
C1Dh
C1Eh
C1Fh
C20h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Core Registers
(Table 3-2)
C8Bh
C8Ch
C8Dh
C8Eh
C8Fh
C90h
C91h
C92h
C93h
C94h
C95h
C96h
C97h
C98h
C99h
C9Ah
C9Bh
C9Ch
C9Dh
C9Eh
C9Fh
CA0h
Unimplemented
 2013-2015 Microchip Technology Inc.
C6Fh
C70h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
CEFh
CF0h
D0Bh
D0Ch
D0Dh
D0Eh
D0Fh
D10h
D11h
D12h
D13h
D14h
D15h
D16h
D17h
D18h
D19h
D1Ah
D1Bh
D1Ch
D1Dh
D1Eh
D1Fh
D20h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
D6Fh
D70h
D8Bh
D8Ch
D8Dh
D8Eh
D8Fh
D90h
D91h
D92h
D93h
D94h
D95h
D96h
D97h
D98h
D99h
D9Ah
D9Bh
D9Ch
D9Dh
D9Eh
D9Fh
DA0h
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
BANK 29
E80h
Core Registers
(Table 3-2)
BANK 30
F00h
Core Registers
(Table 3-2)
BANK 31
F80h
Core Registers
(Table 3-2)
Core Registers
(Table 3-2)
E0Bh
E0Ch
E0Dh
E0Eh
E0Fh
E10h
E11h
E12h
E13h
E14h
E15h
E16h
E17h
See Table 3-7 for
E18h
register mapping
E19h
details
E1Ah
E1Bh
E1Ch
E1Dh
E1Eh
E1Fh
E20h
E8Bh
E8Ch
E8Dh
E8Eh
E8Fh
E90h
E91h
E92h
E93h
E94h
E95h
E96h
E97h
See Table 3-7 for
E98h
register mapping
E99h
details
E9Ah
E9Bh
E9Ch
E9Dh
E9Eh
E9Fh
EA0h
F0Bh
F0Ch
F0Dh
F0Eh
F0Fh
F10h
F11h
F12h
F13h
F14h
F15h
F16h
F17h
See Table 3-7 for
F18h
register mapping
F19h
details
F1Ah
F1Bh
F1Ch
F1Dh
F1Eh
F1Fh
F20h
F8Bh
F8Ch
F8Dh
F8Eh
F8Fh
F90h
F91h
F92h
F93h
F94h
F95h
F96h
F97h
See Table 3-8 for
F98h
register mapping
F99h
details
F9Ah
F9Bh
F9Ch
F9Dh
F9Eh
F9Fh
FA0h
E6Fh
E70h
EEFh
EF0h
F6Fh
F70h
FEFh
FF0h
Unimplemented
DEFh
DF0h
Accesses
70h - 7Fh
D7Fh
BANK 28
E00h
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
CFFh
BANK 27
D80h
Core Registers
(Table 3-2)
Unimplemented
Accesses
70h - 7Fh
C7Fh
BANK 26
D00h
Accesses
70h - 7Fh
DFFh
Accesses
70h - 7Fh
E7Fh
Accesses
70h - 7Fh
EFFh
Accesses
70h - 7Fh
F7Fh
Accesses
70h - 7Fh
FFFh
PIC16(L)F1703/7
DS40001722C-page 26
TABLE 3-6:
PIC16(L)F1703/7
TABLE 3-7:
PIC16(L)F1703/7 MEMORY MAP (BANKS 28-31)
Bank 28
E0Ch
E0Dh
E0Eh
E0Fh
E10h
E11h
E12h
E13h
E14h
E15h
E16h
E17h
E18h
E19h
E1Ah
E1Bh
E1Ch
E1Dh
E1Eh
E1Fh
E20h
E21h
E22h
E23h
E24h
E25h
E26h
E27h
E28h
E29h
E2Ah
E2Bh
E2Ch
E2Dh
E2Eh
E2Fh
E30h
E31h
E32h
E33h
E34h
E35h
E36h
E37h
E38h
E39h
E3Ah
E3Bh
E3Ch
E3Dh
E3Eh
E3Fh
E40h
—
—
—
PPSLOCK
INTPPS
T0CKIPPS
T1CKIPPS
T1GPPS
CCP1PPS
CCP2PPS
—
—
—
—
—
—
—
—
—
—
SSPCLKPPS
SSPDATPPS
SSPSSPPS
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Bank 29
E8Ch
E8Dh
E8Eh
E8Fh
E90h
E91h
E92h
E93h
E94h
E95h
E96h
E97h
E98h
E99h
E9Ah
E9Bh
E9Ch
E9Dh
E9Eh
E9Fh
EA0h
EA1h
EA2h
EA3h
EA4h
EA5h
EA6h
EA7h
EA8h
EA9h
EAAh
EABh
EACh
EADh
EAEh
EAFh
EB0h
EB1h
EB2h
EB3h
EB4h
EB5h
EB6h
EB7h
EB8h
EB9h
EBAh
EBBh
EBCh
EBDh
EBEh
EBFh
EC0h
—
E6Fh
Legend:
Note 1:
—
—
—
—
RA0PPS
RA1PPS
RA2PPS
—
RA4PPS
RA5PPS
—
—
—
—
—
—
RB4PPS(1)
RB5PPS(1)
RB6PPS(1)
RB7PPS(1)
RC0PPS
RC1PPS
RC2PPS
RC3PPS
RC4PPS
RC5PPS
RC6PPS(1)
RC7PPS(1)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Bank 30
F0Ch
F0Dh
F0Eh
F0Fh
F10h
F11h
F12h
F13h
F14h
F15h
F16h
F17h
F18h
F19h
F1Ah
F1Bh
F1Ch
F1Dh
F1Eh
F1Fh
F20h
F21h
F22h
F23h
F24h
F25h
F26h
F27h
F28h
F29h
F2Ah
F2Bh
F2Ch
F2Dh
F2Eh
F2Fh
F30h
F31h
F32h
F33h
F34h
F35h
F36h
F37h
F38h
F39h
F3Ah
F3Bh
F3Ch
F3Dh
F3Eh
F3Fh
F40h
—
—
EEFh
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
F6Fh
= Unimplemented data memory locations, read as ‘0’,
Only available on PIC16(L)F1707 devices
 2013-2015 Microchip Technology Inc.
DS40001722C-page 27
PIC16(L)F1703/7
TABLE 3-8:
PIC16(L)F1703/7 MEMORY
MAP, BANK 31
Bank 31
F8Ch
FE3h
FE4h
FE5h
FE6h
FE7h
FE8h
FE9h
FEAh
FEBh
FECh
FEDh
FEEh
FEFh
Legend:
Unimplemented
Read as ‘0’
STATUS_SHAD
WREG_SHAD
BSR_SHAD
PCLATH_SHAD
FSR0L_SHAD
FSR0H_SHAD
FSR1L_SHAD
FSR1H_SHAD
—
STKPTR
TOSL
TOSH
= Unimplemented data memory locations,
read as ‘0’,
DS40001722C-page 28
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
3.4.5
CORE FUNCTION REGISTERS
SUMMARY
The Core Function registers listed in Table 3-9 can be
addressed from any Bank.
TABLE 3-9:
Addr
Name
CORE FUNCTION REGISTERS SUMMARY
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
Bank 0-31
x00h or
INDF0
x80h
Addressing this location uses contents of FSR0H/FSR0L to address data memory
(not a physical register)
xxxx xxxx
uuuu uuuu
x01h or
INDF1
x81h
Addressing this location uses contents of FSR1H/FSR1L to address data memory
(not a physical register)
xxxx xxxx
uuuu uuuu
x02h or
PCL
x82h
Program Counter (PC) Least Significant Byte
0000 0000
0000 0000
---1 1000
---q quuu
x03h or
STATUS
x83h
—
—
—
TO
PD
Z
DC
C
x04h or
FSR0L
x84h
Indirect Data Memory Address 0 Low Pointer
0000 0000
uuuu uuuu
x05h or
FSR0H
x85h
Indirect Data Memory Address 0 High Pointer
0000 0000
0000 0000
x06h or
FSR1L
x86h
Indirect Data Memory Address 1 Low Pointer
0000 0000
uuuu uuuu
x07h or
FSR1H
x87h
Indirect Data Memory Address 1 High Pointer
0000 0000
0000 0000
---0 0000
---0 0000
0000 0000
uuuu uuuu
-000 0000
-000 0000
0000 000x
0000 000u
x08h or
BSR
x88h
—
x09h or
WREG
x89h
—
BSR4
BSR3
BSR2
BSR1
BSR0
Working Register
x0Ah or
PCLATH
x8Ah
—
x0Bh or
INTCON
x8Bh
GIE
Legend:
—
Write Buffer for upper seven bits of the Program Counter
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 29
 2013-2015 Microchip Technology Inc.
TABLE 3-10:
Address
SPECIAL FUNCTION REGISTER SUMMARY
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
—
—
RA5
RA4
RA3
RA2
RA1
RA0
--xx xxxx
--uu uuuu
Bank 0
00Ch
PORTA
(3)
00Dh
PORTB
RB7
RB6
RB5
RB4
—
—
—
—
xxxx ----
uuuu ----
00Eh
PORTC
RC7(3)
RC6(3)
RC5
RC4
RC3
RC2
RC1
RC0
xxxx xxxx
uuuu uuuu
00Fh
—
Unimplemented
—
—
010h
—
Unimplemented
—
—
011h
PIR1
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
00-- 0000
00-- 0000
012h
PIR2
—
—
—
—
BCL1IF
—
—
CCP2IF
---- 0--0
---- 0--0
013h
PIR3
—
—
—
ZCDIF
—
—
—
—
---0 ----
---0 ----
—
—
—
014h
Unimplemented
TMR0
Timer0 Module Register
xxxx xxxx
uuuu uuuu
016h
TMR1L
Holding Register for the Least Significant Byte of the 16-bit TMR1 Register
xxxx xxxx
uuuu uuuu
017h
TMR1H
Holding Register for the Most Significant Byte of the 16-bit TMR1 Register
xxxx xxxx
uuuu uuuu
018h
T1CON
0000 -0-0
uuuu -u-u
019h
T1GCON
0000 0x00
uuuu uxuu
01Ah
TMR2
Holding Register for the Least Significant Byte of the 16-bit TMR2 Register
0000 0000
0000 0000
01Bh
PR2
Holding Register for the Most Significant Byte of the 16-bit TMR2 Register
1111 1111
1111 1111
01Ch
T2CON
-000 0000
-000 0000
—
—
01Dh
to
01Fh
Legend:
DS40001722C-page 30
Note 1:
2:
3:
4:
—
TMR1CS<1:0>
TMR1GE
—
T1GPOL
T1CKPS<1:0>
T1GTM
T1GSPM
T2OUTPS<3:0>
—
T1SYNC
T1GGO/
DONE
T1GVAL
TMR2ON
Unimplemented
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
—
TMR1ON
T1GSS<1:0>
T2CKPS<1:0>
PIC16(L)F1703/7
015h
 2013-2015 Microchip Technology Inc.
TABLE 3-10:
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
—
—
TRISA5
TRISA4
—(1)
Value on
POR, BOR
Value on all
other Resets
Bank 1
TRISA2
TRISA1
TRISA0
--11 1111
--11 1111
08Dh
TRISB
TRISB7
TRISB6
TRISB5
TRISB4
—
—
—
—
1111 ----
1111 ----
08Eh
TRISC
TRISC7(3)
TRISC6(3)
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
1111 1111
1111 1111
—
—
08Ch
TRISA
(3)
08Fh
090h
—
Unimplemented
—
Unimplemented
—
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
00-- 0000
0000 0000
—
—
BCL1IE
—
—
CCP2IE
---- 0--0
000- 0000
—
ZCDIE
—
—
—
—
---0 ----
---0 ----
PSA
PIE1
TMR1GIE
ADIE
—
092h
PIE2
—
—
093h
PIE3
—
—
091h
094h
—
Unimplemented
095h
OPTION_REG
WPUEN
INTEDG
TMR0CS
TMR0SE
096h
PCON
STKOVF
STKUNF
—
RWDT
097h
WDTCON
—
—
—
RMCLR
RI
POR
WDTPS<4:0>
OSCTUNE
—
099h
OSCCON
SPLLEN
09Ah
OSCSTAT
—
PLLR
OSTS
HFIOFR
HFIOFL
MFIOFR
LFIOFR
09Bh
ADRES
—
—
—
—
—
—
—
09Bh
ADRESL
09Ch
ADRESH
09Dh
ADCON0
—
09Eh
ADCON1
ADFM
09Fh
ADCON2
DS40001722C-page 31
Note 1:
2:
3:
4:
—
1111 1111
BOR
00-1 11qq
qq-q qquu
SWDTEN
--01 0110
--01 0110
TUN<5:0>
--00 0000
--00 0000
0011 1-00
0011 1-00
HFIOFS
-qq0 0q0q
qqqq -q0q
—
—
—
ADC Result Register Low
xxxx xxxx
uuuu uuuu
ADC Result Register High
xxxx xxxx
uuuu uuuu
-000 0000
-000 0000
0000 -000
0000 -000
0000 ----
0000 ----
IRCF<3:0>
—
CHS<4:0>
ADCS<2:0>
TRIGSEL<3:0>
SCS<1:0>
GO/DONE
—
ADNREF
—
—
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
ADON
ADPREF<1:0>
—
—
PIC16(L)F1703/7
098h
Legend:
—
1111 1111
PS<2:0>
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
Bank 2
10Ch
LATA
10Dh
LATB(3)
10Eh
LATC
—
—
LATA5
LATA4
—
LATA2
LATA1
LATA0
--xx -xxx
--uu -uuu
LATB7
LATB6
LATB5
LATB4
—
—
—
—
xxxx ----
uuuu ----
LATC7(3)
LATC6(3)
LATC5
LATC4
LATC3
LATC2
LATC1
LATC0
xxxx xxxx
uuuu uuuu
10Fh
—
Unimplemented
—
—
110h
—
Unimplemented
—
—
111h
—
Unimplemented
—
—
112h
—
Unimplemented
—
—
113h
—
Unimplemented
—
—
114h
—
Unimplemented
—
—
115h
—
Unimplemented
—
—
10-- ---q
uu-- ---u
0q00 0000
0q00 0000
116h
BORCON
SBOREN
BORFS
—
—
117h
FVRCON
FVREN
FVRRDY
TSEN
TSRNG
—
—
CDAFVR<1:0>
—
BORRDY
ADFVR<1:0>
118h
—
Unimplemented
—
—
119h
—
Unimplemented
—
—
11Ah
—
Unimplemented
—
—
11Bh
—
Unimplemented
—
—
0-x0 --00
0-x0 --00
11Ch
ZCD1CON
ZCD1EN
—
ZCD1OUT
ZCD1POL
—
—
ZCD1INTP
ZCD1INTN
11Dh
—
Unimplemented
—
—
11Eh
—
Unimplemented
—
—
11Fh
—
Unimplemented
—
—
Legend:
 2013-2015 Microchip Technology Inc.
Note 1:
2:
3:
4:
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
PIC16(L)F1703/7
DS40001722C-page 32
TABLE 3-10:
 2013-2015 Microchip Technology Inc.
TABLE 3-10:
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
Bank 3
18Ch
ANSELA
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
---1 -111
---1 -111
18Dh
ANSELB(3)
—
—
ANSB5
ANSB4
—
—
—
—
--11 ----
--11 ----
18Eh
ANSELC
ANSC7(3)
ANSC6(3)
ANSC5(2)
ANSC4(2)
ANSC3
ANSC2
ANSC1
ANSC0
11-- 1111
11-- 1111
18Fh
—
—
—
190h
—
Unimplemented
Unimplemented
191h
PMADRL
192h
PMADRH
193h
PMDATL
194h
PMDATH
—
—
195h
PMCON1
—
CFGS
196h
PMCON2
197h
VREGCON(4)
Program Memory Address Register Low Byte
—(1)
Program Memory Address Register High Byte
Program Memory Read Data Register Low Byte
Program Memory Read Data Register High Byte
—
—
0000 0000
1000 0000
1000 0000
xxxx xxxx
uuuu uuuu
--xx xxxx
--uu uuuu
LWLO
FREE
WRERR
WREN
WR
RD
-000 x000
-000 q000
0000 0000
0000 0000
—
—
—
—
VREGPM
Reserved
---- --01
---- --01
Program Memory Control Register 2
—
—
0000 0000
—
Unimplemented
—
—
199h
—
Unimplemented
—
—
19Ah
—
Unimplemented
—
—
19Bh
—
Unimplemented
—
—
19Ch
—
Unimplemented
—
—
19Dh
—
Unimplemented
—
—
19Eh
—
Unimplemented
—
—
19Fh
—
Unimplemented
—
—
Legend:
Note 1:
2:
3:
4:
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
DS40001722C-page 33
PIC16(L)F1703/7
198h
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
Bank 4
20Ch
WPUA
20Dh
WPUB(3)
20Eh
WPUC
—
—
WPUA5
WPUA4
WPUA3
WPUA2
WPUA1
WPUA0
--11 1111
--11 1111
WPUB7
WPUB6
WPUB5
WPUB4
—
—
—
—
1111 ----
1111 ----
WPUC5
WPUC4
WPUC3
WPUC2
WPUC1
WPUC0
(3)
WPUC7
(3)
WPUC6
1111 1111
1111 1111
20Fh
—
Unimplemented
—
—
210h
—
Unimplemented
—
—
xxxx xxxx
uuuu uuuu
211h
SSP1BUF
212h
SSP1ADD
ADD<7:0>
xxxx xxxx
uuuu uuuu
213h
SSP1MSK
MSK<7:0>
xxxx xxxx
uuuu uuuu
0000 0000
0000 0000
0000 0000
0000 0000
Synchronous Serial Port Receive Buffer/Transmit Register
214h
SSP1STAT
SMP
CKE
D/A
P
215h
SSP1CON1
WCOL
SSPOV
SSPEN
CKP
216h
SSP1CON2
GCEN
ACKSTAT
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
0000 0000
0000 0000
217h
SSP1CON3
ACKTIM
PCIE
SCIE
BOEN
SDAHT
SBCDE
AHEN
DHEN
0000 0000
0000 0000
—
—
218h
—
21Fh
Legend:
Note 1:
2:
3:
4:
—
S
R/W
UA
BF
SSPM
Unimplemented
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
PIC16(L)F1703/7
DS40001722C-page 34
TABLE 3-10:
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
TABLE 3-10:
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
Bank 5
28Ch
ODCONA
28Dh
ODCONB(3)
28Eh
ODCONC
28Fh
—
—
—
ODA5
ODA4
—
ODA2
ODA1
ODA0
--00 -000
--00 -000
ODB7
ODB6
ODB5
ODB4
—
—
—
—
0000 ----
0000 ----
ODC7(3)
ODC6(3)
ODC5
ODC4
ODC3
ODC2
ODC1
ODC0
0000 0000
0000 0000
—
—
Unimplemented
290h
—
291h
CCPR1L
Capture/Compare/PWM Register 1 (LSB)
292h
CCPR1H
Capture/Compare/PWM Register 1 (MSB)
293h
CCP1CON
294h
—
297h
—
Unimplemented
—
—
DC1B<1:0>
CCP1M<3:0>
Unimplemented
—
—
xxxx xxxx
uuuu uuuu
xxxx xxxx
uuuu uuuu
--00 0000
--00 0000
—
—
298h
CCPR2L
Capture/Compare/PWM Register 2 (LSB)
xxxx xxxx
uuuu uuuu
299h
CCPR2H
Capture/Compare/PWM Register 2 (MSB)
xxxx xxxx
uuuu uuuu
29Ah
CCP2CON
--00 0000
--00 0000
—
—
29Bh
—
29Fh
Legend:
—
DC2B<1:0>
CCP2M<3:0>
Unimplemented
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
DS40001722C-page 35
PIC16(L)F1703/7
Note 1:
2:
3:
4:
—
—
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
Bank 6
30Ch
SLRCONA
30Dh
SLRCONB(3)
30Eh
SLRCONC
30Fh
—
31Fh
—
—
—
SLRA5
SLRA4
—
SLRA2
SLRA1
SLRA0
--11 -111
--11 -111
SLRB7
SLRB6
SLRB5
SLRB4
—
—
—
—
1111 ----
1111 ----
SLRC7(3)
SLRC6(3)
SLRC5
SLRC4
SLRC3
SLRC2
SLRC1
SLRC0
1111 1111
1111 1111
—
—
--11 1111
--11 1111
Unimplemented
Bank 7
38Ch
INLVLA
(3)
—
—
INLVLA5
INLVLA4
INLVLA3
INLVLA2
INLVLA1
INLVLA0
38Dh
INLVLB
INLVLB7
INLVLB6
INLVLB5
INLVLB4
—
—
—
—
1111 ----
1111 ----
38Eh
INLVLC
INLVLC7(3)
INLVLC6(3)
INLVLC5
INLVLC4
INLVLC3
INLVLC2
INLVLC1
INLVLC0
1111 1111
1111 1111
38Fh
—
Unimplemented
—
—
390h
—
Unimplemented
—
—
391h
IOCAP
—
—
IOCAP5
IOCAP4
IOCAP3
IOCAP2
IOCAP1
IOCAP0
--00 0000
--00 0000
392h
IOCAN
—
—
IOCAN5
IOCAN4
IOCAN3
IOCAN2
IOCAN1
IOCAN0
--00 0000
--00 0000
393h
IOCAF
—
—
IOCAF5
IOCAF4
IOCAF3
IOCAF2
IOCAF1
IOCAF0
--00 0000
--00 0000
394h
IOCBP(3)
IOCBP7
IOCBP6
IOCBP5
IOCBP4
—
—
—
—
0000 ----
0000 ----
395h
IOCBN(3)
IOCBN7
IOCBN6
IOCBN5
IOCBN4
—
—
—
—
0000 ----
0000 ----
396h
IOCBF(3)
IOCBF7
IOCBF6
IOCBF5
IOCBF4
—
—
—
—
0000 ----
0000 ----
397h
IOCCP
IOCCP7(3)
IOCCP6(3)
IOCCP5
IOCCP4
IOCCP3
IOCCP2
IOCCP1
IOCCP0
0000 0000
0000 0000
398h
IOCCN
IOCCN7(3)
IOCCN6(3)
IOCCN5
IOCCN4
IOCCN3
IOCCN2
IOCCN1
IOCCN0
0000 0000
0000 0000
IOCCF
(3)
(3)
IOCCF5
IOCCF4
IOCCF3
IOCCF2
IOCCF1
IOCCF0
0000 0000
0000 0000
399h
 2013-2015 Microchip Technology Inc.
39Ah
—
39Fh
IOCCF7
IOCCF6
—
Unimplemented
—
—
—
Unimplemented
—
—
Bank 8
40Ch
—
41Fh
Legend:
Note 1:
2:
3:
4:
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
PIC16(L)F1703/7
DS40001722C-page 36
TABLE 3-10:
 2013-2015 Microchip Technology Inc.
TABLE 3-10:
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Value on
POR, BOR
Value on all
other Resets
Unimplemented
—
—
Unimplemented
—
—
00-0 --00
00-0 --00
—
—
00-0 --00
00-0 --00
Name
Bit 7
—
—
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bank 9
48Ch
to
49Fh
Bank 10
50Ch
—
510h
511h
OPA1CON
512h
—
514h
515h
—
OPA2CON
516h
—
51Fh
OPA1EN
OPA1SP
—
OPA1UG
—
—
OPA1PCH<1:0>
Unimplemented
OPA2EN
OPA2SP
—
OPA2UG
—
—
OPA2PCH<1:0>
—
Unimplemented
—
—
—
Unimplemented
—
—
Bank 11-27
58Ch/
59Fh
—
D8Ch/
D9Fh
Legend:
DS40001722C-page 37
PIC16(L)F1703/7
Note 1:
2:
3:
4:
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
—
Unimplemented
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
—
—
Bank 28
E0Ch
—
E0Eh
E0Fh
PPSLOCK
—
—
—
---- ---0
---- ---0
E10h
INTPPS
—
—
—
INTPPS<4:0>
---0 0010
---u uuuu
E11h
T0CKIPPS
—
—
—
T0CKIPPS<4:0>
---0 0010
---u uuuu
E12h
T1CKIPPS
—
—
—
T1CKIPPS<4:0>
---0 0101
---u uuuu
E13h
T1GPPS
—
—
—
T1GPPS<4:0>
---0 0100
---u uuuu
E14h
CCP1PPS
—
—
—
CCP1PPS<4:0>
---1 0101
---u uuuu
E15h
CCP2PPS
—
—
—
CCP2PPS<4:0>
---1 0011
---u uuuu
—
—
E16h
to
E1Fh
E20h
E21h
E22h
E23h
to
E6Fh
 2013-2015 Microchip Technology Inc.
Legend:
Note 1:
2:
3:
4:
—
SSPCLKPPS
SSPDATPPS
SSPSSPPS
—
—
—
—
Unimplemented
—
PPSLOCKED
—
—
—
SSPCLKPPS<4:0>
---1 0000(3)
---u uuuu
—
—
—
SSPCLKPPS<4:0>
---0 1110(4)
---u uuuu
—
—
—
SSPDATPPS<4:0>
---1 0001(3)
---u uuuu
(4)
—
—
—
SSPDATPPS<4:0>
---0 1100
---u uuuu
—
—
—
SSPSSPPS<4:0>
---1 0011(3)
---u uuuu
—
—
—
SSPSSPPS<4:0>
---1 0110(4)
---u uuuu
—
—
Unimplemented
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
PIC16(L)F1703/7
DS40001722C-page 38
TABLE 3-10:
 2013-2015 Microchip Technology Inc.
TABLE 3-10:
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Bit 6
Value on
POR, BOR
Value on all
other Resets
—
—
RA0PPS<4:0>
---0 0000
---u uuuu
—
RA1PPS<4:0>
---0 0000
---u uuuu
—
RA2PPS<4:0>
---0 0000
---u uuuu
—
—
Name
Bit 7
Bit 5
E8Ch
—
E8Fh
—
Unimplemented
E90h
RA0PPS
—
—
—
E91h
RA1PPS
—
—
E92h
RA2PPS
—
—
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bank 29
E93h
—
E94h
Unimplemented
—
—
—
RA4PPS<4:0>
---0 0000
---u uuuu
RA5PPS
—
—
—
RA5PPS<4:0>
---0 0000
---u uuuu
E96h
to
E9Fh
—
—
—
EA0h
RC0PPS
—
—
—
RC0PPS<4:0>
---0 0000
---u uuuu
EA1h
RC1PPS
—
—
—
RC1PPS<4:0>
---0 0000
---u uuuu
EA2h
RC2PPS
—
—
—
RC2PPS<4:0>
---0 0000
---u uuuu
EA3h
RC3PPS
—
—
—
RC3PPS<4:0>
---0 0000
---u uuuu
EA4h
RC4PPS
—
—
—
RC4PPS<4:0>
---0 0000
---u uuuu
EA5h
RC5PPS
—
—
—
RC5PPS<4:0>
---0 0000
---u uuuu
EA6h
—
EEFh
—
Unimplemented
—
—
—
Unimplemented
—
—
Unimplemented
Bank 30
F0Ch
—
F6Fh
Legend:
DS40001722C-page 39
Note 1:
2:
3:
4:
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
PIC16(L)F1703/7
RA4PPS
E95h
Address
SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Name
Bit 7
—
Unimplemented
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other Resets
—
—
---- -xxx
---- -xxx
xxxx xxxx
uuuu uuuu
---x xxxx
---u uuuu
-xxx xxxx
uuuu uuuu
Bank 31
F8Eh
to
FE3h
FE4h
STATUS_
FE5h
WREG_
SHAD
FE6h
BSR_
SHAD
—
—
—
—
Z
—
DC
Working Register Shadow
—
—
—
Bank Select Register Shadow
C
SHAD
FE7h
PCLATH_
SHAD
FE8h
FSR0L_
SHAD
Indirect Data Memory Address 0 Low Pointer Shadow
xxxx xxxx
uuuu uuuu
FE9h
FSR0H_
SHAD
Indirect Data Memory Address 0 High Pointer Shadow
xxxx xxxx
uuuu uuuu
FEAh
FSR1L_
SHAD
Indirect Data Memory Address 1 Low Pointer Shadow
xxxx xxxx
uuuu uuuu
FEBh
FSR1H_
SHAD
Indirect Data Memory Address 1 High Pointer Shadow
xxxx xxxx
uuuu uuuu
FECh
—
FEDh
STKPTR
FEEh
TOSL
FEFh
 2013-2015 Microchip Technology Inc.
Legend:
Note 1:
2:
3:
4:
TOSH
—
Program Counter Latch High Register Shadow
Unimplemented
—
—
—
Current Stack Pointer
Top of Stack Low byte
—
Top of Stack High byte
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
Unimplemented, read as ‘1’.
PIC16(L)F1703 only.
PIC16(L)F1707 only.
Unimplemented on PIC16LF1703/7.
—
—
---x xxxx
---x xxxx
xxxx xxxx
uuuu uuuu
-xxx xxxx
-uuu uuuu
PIC16(L)F1703/7
DS40001722C-page 40
TABLE 3-10:
PIC16(L)F1703/7
3.5
3.5.3
PCL and PCLATH
COMPUTED FUNCTION CALLS
The Program Counter (PC) is 15 bits wide. The low byte
comes from the PCL register, which is a readable and
writable register. The high byte (PC<14:8>) is not directly
readable or writable and comes from PCLATH. On any
Reset, the PC is cleared. Figure 3-3 shows the five
situations for the loading of the PC.
A computed function CALL allows programs to maintain
tables of functions and provide another way to execute
state machines or look-up tables. When performing a
table read using a computed function CALL, care
should be exercised if the table location crosses a PCL
memory boundary (each 256-byte block).
FIGURE 3-3:
If using the CALL instruction, the PCH<2:0> and PCL
registers are loaded with the operand of the CALL
instruction. PCH<6:3> is loaded with PCLATH<6:3>.
PC
LOADING OF PC IN
DIFFERENT SITUATIONS
14
PCH
6
7
14
PCH
PCL
0
PCLATH
PC
8
ALU Result
PCL
0
4
0
11
OPCODE <10:0>
PC
14
PCH
PCL
0
CALLW
6
PCLATH
PC
Instruction with
PCL as
Destination
GOTO, CALL
6
PCLATH
0
14
7
0
PCH
8
W
PCL
0
BRW
PC + W
14
PCH
3.5.4
BRANCHING
The branching instructions add an offset to the PC.
This allows relocatable code and code that crosses
page boundaries. There are two forms of branching,
BRW and BRA. The PC will have incremented to fetch
the next instruction in both cases. When using either
branching instruction, a PCL memory boundary may be
crossed.
If using BRW, load the W register with the desired
unsigned address and execute BRW. The entire PC will
be loaded with the address PC + 1 + W.
If using BRA, the entire PC will be loaded with PC + 1 +,
the signed value of the operand of the BRA instruction.
15
PC
The CALLW instruction enables computed calls by combining PCLATH and W to form the destination address.
A computed CALLW is accomplished by loading the W
register with the desired address and executing CALLW.
The PCL register is loaded with the value of W and
PCH is loaded with PCLATH.
PCL
0
BRA
15
PC + OPCODE <8:0>
3.5.1
MODIFYING PCL
Executing any instruction with the PCL register as the
destination simultaneously causes the Program
Counter PC<14:8> bits (PCH) to be replaced by the
contents of the PCLATH register. This allows the entire
contents of the program counter to be changed by
writing the desired upper seven bits to the PCLATH
register. When the lower eight bits are written to the
PCL register, all 15 bits of the program counter will
change to the values contained in the PCLATH register
and those being written to the PCL register.
3.5.2
COMPUTED GOTO
A computed GOTO is accomplished by adding an offset to
the program counter (ADDWF PCL). When performing a
table read using a computed GOTO method, care should
be exercised if the table location crosses a PCL memory
boundary (each 256-byte block). Refer to Application
Note AN556, “Implementing a Table Read” (DS00556).
 2013-2015 Microchip Technology Inc.
DS40001722C-page 41
PIC16(L)F1703/7
3.6
3.6.1
Stack
The stack is available through the TOSH, TOSL and
STKPTR registers. STKPTR is the current value of the
Stack Pointer. TOSH:TOSL register pair points to the
TOP of the stack. Both registers are read/writable. TOS
is split into TOSH and TOSL due to the 15-bit size of the
PC. To access the stack, adjust the value of STKPTR,
which will position TOSH:TOSL, then read/write to
TOSH:TOSL. STKPTR is five bits to allow detection of
overflow and underflow.
All devices have a 16-level x 15-bit wide hardware
stack (refer to Figure 3-1). The stack space is not part
of either program or data space. The PC is PUSHed
onto the stack when CALL or CALLW instructions are
executed or an interrupt causes a branch. The stack is
POPed in the event of a RETURN, RETLW or a RETFIE
instruction execution. PCLATH is not affected by a
PUSH or POP operation.
The stack operates as a circular buffer if the STVREN
bit is programmed to ‘0‘ (Configuration Words). This
means that after the stack has been PUSHed sixteen
times, the seventeenth PUSH overwrites the value that
was stored from the first PUSH. The eighteenth PUSH
overwrites the second PUSH (and so on). The
STKOVF and STKUNF flag bits will be set on an Overflow/Underflow, regardless of whether the Reset is
enabled.
Note:
Note:
Care should be taken when modifying the
STKPTR while interrupts are enabled.
During normal program operation, CALL, CALLW and
Interrupts will increment STKPTR while RETLW,
RETURN, and RETFIE will decrement STKPTR. At any
time, STKPTR can be inspected to see how much
stack is left. The STKPTR always points at the currently
used place on the stack. Therefore, a CALL or CALLW
will increment the STKPTR and then write the PC, and
a return will unload the PC and then decrement the
STKPTR.
There are no instructions/mnemonics
called PUSH or POP. These are actions
that occur from the execution of the CALL,
CALLW, RETURN, RETLW and RETFIE
instructions or the vectoring to an interrupt
address.
FIGURE 3-4:
ACCESSING THE STACK
Reference Figure 3-4 through Figure 3-7 for examples
of accessing the stack.
ACCESSING THE STACK EXAMPLE 1
TOSH:TOSL
0x0F
STKPTR = 0x1F
Stack Reset Disabled
(STVREN = 0)
0x0E
0x0D
0x0C
0x0B
0x0A
Initial Stack Configuration:
0x09
After Reset, the stack is empty. The
empty stack is initialized so the Stack
Pointer is pointing at 0x1F. If the Stack
Overflow/Underflow Reset is enabled, the
TOSH/TOSL registers will return ‘0’. If
the Stack Overflow/Underflow Reset is
disabled, the TOSH/TOSL registers will
return the contents of stack address 0x0F.
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
TOSH:TOSL
DS40001722C-page 42
0x1F
0x0000
STKPTR = 0x1F
Stack Reset Enabled
(STVREN = 1)
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 3-5:
ACCESSING THE STACK EXAMPLE 2
0x0F
0x0E
0x0D
0x0C
0x0B
0x0A
0x09
This figure shows the stack configuration
after the first CALL or a single interrupt.
If a RETURN instruction is executed, the
return address will be placed in the
Program Counter and the Stack Pointer
decremented to the empty state (0x1F).
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
TOSH:TOSL
FIGURE 3-6:
0x00
Return Address
STKPTR = 0x00
ACCESSING THE STACK EXAMPLE 3
0x0F
0x0E
0x0D
0x0C
After seven CALLs or six CALLs and an
interrupt, the stack looks like the figure
on the left. A series of RETURN instructions
will repeatedly place the return addresses
into the Program Counter and pop the stack.
0x0B
0x0A
0x09
0x08
0x07
TOSH:TOSL
 2013-2015 Microchip Technology Inc.
0x06
Return Address
0x05
Return Address
0x04
Return Address
0x03
Return Address
0x02
Return Address
0x01
Return Address
0x00
Return Address
STKPTR = 0x06
DS40001722C-page 43
PIC16(L)F1703/7
FIGURE 3-7:
ACCESSING THE STACK EXAMPLE 4
TOSH:TOSL
3.6.2
0x0F
Return Address
0x0E
Return Address
0x0D
Return Address
0x0C
Return Address
0x0B
Return Address
0x0A
Return Address
0x09
Return Address
0x08
Return Address
0x07
Return Address
0x06
Return Address
0x05
Return Address
0x04
Return Address
0x03
Return Address
0x02
Return Address
0x01
Return Address
0x00
Return Address
When the stack is full, the next CALL or
an interrupt will set the Stack Pointer to
0x10. This is identical to address 0x00
so the stack will wrap and overwrite the
return address at 0x00. If the Stack
Overflow/Underflow Reset is enabled, a
Reset will occur and location 0x00 will
not be overwritten.
STKPTR = 0x10
OVERFLOW/UNDERFLOW RESET
If the STVREN bit in Configuration Words is
programmed to ‘1’, the device will be reset if the stack
is PUSHed beyond the sixteenth level or POPed
beyond the first level, setting the appropriate bits
(STKOVF or STKUNF, respectively) in the PCON
register.
3.7
Indirect Addressing
The INDFn registers are not physical registers. Any
instruction that accesses an INDFn register actually
accesses the register at the address specified by the
File Select Registers (FSR). If the FSRn address
specifies one of the two INDFn registers, the read will
return ‘0’ and the write will not occur (though Status bits
may be affected). The FSRn register value is created
by the pair FSRnH and FSRnL.
The FSR registers form a 16-bit address that allows an
addressing space with 65536 locations. These locations
are divided into three memory regions:
• Traditional Data Memory
• Linear Data Memory
• Program Flash Memory
DS40001722C-page 44
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 3-8:
INDIRECT ADDRESSING
0x0000
0x0000
Traditional
Data Memory
0x0FFF
0x1000
0x1FFF
0x0FFF
Reserved
0x2000
Linear
Data Memory
0x29AF
0x29B0
FSR
Address
Range
0x7FFF
0x8000
Reserved
0x0000
Program
Flash Memory
0xFFFF
Note:
0x7FFF
Not all memory regions are completely implemented. Consult device memory tables for memory limits.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 45
PIC16(L)F1703/7
3.7.1
TRADITIONAL DATA MEMORY
The traditional data memory is a region from FSR
address 0x000 to FSR address 0xFFF. The addresses
correspond to the absolute addresses of all SFR, GPR
and common registers.
FIGURE 3-9:
TRADITIONAL DATA MEMORY MAP
Direct Addressing
4
BSR
0
6
Indirect Addressing
From Opcode
0
7
0
Bank Select
Location Select
FSRxH
0
0
0
7
FSRxL
0
0
Bank Select
00000 00001 00010
11111
Bank 0 Bank 1 Bank 2
Bank 31
Location Select
0x00
0x7F
DS40001722C-page 46
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
3.7.2
3.7.3
LINEAR DATA MEMORY
The linear data memory is the region from FSR
address 0x2000 to FSR address 0x29AF. This region is
a virtual region that points back to the 80-byte blocks of
GPR memory in all the banks.
Unimplemented memory reads as 0x00. Use of the
linear data memory region allows buffers to be larger
than 80 bytes because incrementing the FSR beyond
one bank will go directly to the GPR memory of the next
bank.
The 16 bytes of common memory are not included in
the linear data memory region.
FIGURE 3-10:
7
FSRnH
0 0 1
LINEAR DATA MEMORY
MAP
0
7
FSRnL
0
PROGRAM FLASH MEMORY
To make constant data access easier, the entire
program Flash memory is mapped to the upper half of
the FSR address space. When the MSB of FSRnH is
set, the lower 15 bits are the address in program
memory which will be accessed through INDF. Only the
lower eight bits of each memory location is accessible
via INDF. Writing to the program Flash memory cannot
be accomplished via the FSR/INDF interface. All
instructions that access program Flash memory via the
FSR/INDF interface will require one additional
instruction cycle to complete.
FIGURE 3-11:
7
1
FSRnH
PROGRAM FLASH
MEMORY MAP
0
Location Select
Location Select
0x2000
7
FSRnL
0x8000
0
0x0000
0x020
Bank 0
0x06F
0x0A0
Bank 1
0x0EF
0x120
Program
Flash
Memory
(low 8
bits)
Bank 2
0x16F
0xF20
Bank 30
0x29AF
 2013-2015 Microchip Technology Inc.
0xF6F
0xFFFF
0x7FFF
DS40001722C-page 47
PIC16(L)F1703/7
4.0
DEVICE CONFIGURATION
Device configuration consists of Configuration Words,
Code Protection and Device ID.
4.1
Configuration Words
There are several Configuration Word bits that allow
different oscillator and memory protection options.
These are implemented as Configuration Word 1 at
8007h and Configuration Word 2 at 8008h.
Note:
The DEBUG bit in Configuration Words is
managed automatically by device
development tools including debuggers
and programmers. For normal device
operation, this bit should be maintained as
a ‘1’.
DS40001722C-page 48
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
4.2
Register Definitions: Configuration Words
REGISTER 4-1:
CONFIG1: CONFIGURATION WORD 1
U-1
—
U-1
R/P-1
—
CLKOUTEN
R/P-1
U-1
R/P-1
BOREN<1:0>
—
bit 8
bit 13
R/P-1
CP
(1)
R/P-1
R/P-1
MCLRE
PWRTE
R/P-1
R/P-1
R/P-1
WDTE<1:0>
R/P-1
—
R/P-1
FOSC<1:0>
bit 0
bit 7
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘1’
‘0’ = Bit is cleared
‘1’ = Bit is set
-n = Value when blank or after Bulk Erase
bit 13-12
Unimplemented: Read as ‘1’
bit 11
CLKOUTEN: Clock Out Enable bit
1 = CLKOUT function is disabled. I/O function on the CLKOUT pin.
0 = CLKOUT function is enabled on the CLKOUT pin
bit 10-9
BOREN<1:0>: Brown-out Reset Enable bits
11 = BOR enabled
10 = BOR enabled during operation and disabled in Sleep
01 = BOR controlled by SBOREN bit of the BORCON register
00 = BOR disabled
bit 8
Unimplemented: Read as ‘1’
bit 7
CP: Code Protection bit(1)
1 = Program memory code protection is disabled
0 = Program memory code protection is enabled
bit 6
MCLRE: MCLR/VPP Pin Function Select bit
If LVP bit = 1:
This bit is ignored.
If LVP bit = 0:
1 = MCLR/VPP pin function is MCLR; Weak pull-up enabled.
0 = MCLR/VPP pin function is digital input; MCLR internally disabled; Weak pull-up under control of
WPUE3 bit
bit 5
PWRTE: Power-up Timer Enable bit
1 = PWRT disabled
0 = PWRT enabled
bit 4-3
WDTE<1:0>: Watchdog Timer Enable bit
11 = WDT enabled
10 = WDT enabled while running and disabled in Sleep
01 = WDT controlled by the SWDTEN bit in the WDTCON register
00 = WDT disabled
bit 2
Unimplemented: Read as ‘1’
bit 1-0
FOSC<1:0>: Oscillator Selection bits
11 = ECH: External Clock, High-Power mode (4-20 MHz): device clock supplied to CLKIN pin
10 = ECM: External Clock, Medium-Power mode (0.5-4 MHz): device clock supplied to CLKIN pin
01 = ECL: External Clock, Low-Power mode (0-0.5 MHz): device clock supplied to CLKIN pin
00 = INTOSC oscillator: I/O function on CLKIN pin
Note 1:
The entire Flash program memory will be erased when the code protection is turned off during an erase. When a Bulk
Erase Program Memory Command is executed, the entire program Flash memory and configuration memory will be
erased.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 49
PIC16(L)F1703/7
REGISTER 4-2:
CONFIG2: CONFIGURATION WORD 2
R/P-1
LVP
(1)
R/P-1
DEBUG
R/P-1
(2)
LPBOR
R/P-1
(3)
BORV
R/P-1
R/P-1
STVREN
PLLEN
bit 13
bit 8
R/P-1
U-1
U-1
U-1
U-1
R/P-1
ZCDDIS
—
—
—
—
PPS1WAY
R/P-1
bit 7
R/P-1
WRT<1:0>
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘1’
‘0’ = Bit is cleared
‘1’ = Bit is set
-n = Value when blank or after Bulk Erase
bit 13
LVP: Low-Voltage Programming Enable bit(1)
1 = Low-voltage programming enabled
0 = High-voltage on MCLR must be used for programming
bit 12
DEBUG: In-Circuit Debugger Mode bit(2)
1 = In-Circuit Debugger disabled, ICSPCLK and ICSPDAT are general purpose I/O pins
0 = In-Circuit Debugger enabled, ICSPCLK and ICSPDAT are dedicated to the debugger
bit 11
LPBOR: Low-Power BOR Enable bit
1 = Low-Power Brown-out Reset is disabled
0 = Low-Power Brown-out Reset is enabled
bit 10
BORV: Brown-out Reset Voltage Selection bit(3)
1 = Brown-out Reset voltage (VBOR), low trip point selected
0 = Brown-out Reset voltage (VBOR), high trip point selected
bit 9
STVREN: Stack Overflow/Underflow Reset Enable bit
1 = Stack Overflow or Underflow will cause a Reset
0 = Stack Overflow or Underflow will not cause a Reset
bit 8
PLLEN: PLL Enable bit
1 = 4xPLL enabled
0 = 4xPLL disabled
bit 7
ZCDDIS: ZCD Disable bit
1 = ZCD disabled. ZCD can be enabled by setting the ZCDSEN bit of ZCDCON
0 = ZCD always enabled
bit 6-3
Unimplemented: Read as ‘1’
bit 2
PPS1WAY: PPSLOCK Bit One-Way Set Enable bit
1 = The PPSLOCK bit can only be set once after an unlocking sequence is executed; once PPSLOCK is set, all
future changes to PPS registers are prevented
0 = The PPSLOCK bit can be set and cleared as needed (provided an unlocking sequence is executed)
bit 1-0
WRT<1:0>: Flash Memory Self-Write Protection bits
4 kW Flash memory
11 = Write protection off
10 = 000h to 1FFh write protected, 200h to FFFh may be modified by PMCON control
01 = 000h to 7FFh write protected, 800h to FFFh may be modified by PMCON control
00 = 000h to FFFh write protected, no addresses may be modified by PMCON control
Note 1:
2:
3:
The LVP bit cannot be programmed to ‘0’ when Programming mode is entered via LVP.
The DEBUG bit in Configuration Words is managed automatically by device development tools including debuggers
and programmers. For normal device operation, this bit should be maintained as a ‘1’.
See VBOR parameter for specific trip point voltages.
DS40001722C-page 50
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
4.3
Code Protection
Code protection allows the device to be protected from
unauthorized access. Program memory protection is
controlled independently. Internal access to the
program memory is unaffected by any code protection
setting.
4.3.1
PROGRAM MEMORY PROTECTION
The entire program memory space is protected from
external reads and writes by the CP bit in Configuration
Words. When CP = 0, external reads and writes of
program memory are inhibited and a read will return all
‘0’s. The CPU can continue to read program memory,
regardless of the protection bit settings. Writing the
program memory is dependent upon the write
protection
setting.
See
Section 4.4
“Write
Protection” for more information.
4.4
Write Protection
Write protection allows the device to be protected from
unintended self-writes. Applications, such as boot
loader software, can be protected while allowing other
regions of the program memory to be modified.
The WRT<1:0> bits in Configuration Words define the
size of the program memory block that is protected.
4.5
User ID
Four memory locations (8000h-8003h) are designated
as ID locations where the user can store checksum or
other code identification numbers. These locations are
readable and writable during normal execution. See
Section 10.4 “User ID, Device ID and Configuration
Word Access” for more information on accessing
these memory locations. For more information on
checksum calculation, see the “PIC16(L)F170X
Memory Programming Specification” (DS41683).
 2013-2015 Microchip Technology Inc.
DS40001722C-page 51
PIC16(L)F1703/7
4.6
Device ID and Revision ID
The 14-bit device ID word is located at 8006h and the
14-bit revision ID is located at 8005h. These locations
are read-only and cannot be erased or modified. See
Section 10.4 “User ID, Device ID and Configuration
Word Access” for more information on accessing
these memory locations.
Development tools, such as device programmers and
debuggers, may be used to read the Device ID and
Revision ID.
4.7
Register Definitions: Device and Revision
REGISTER 4-3:
DEVID: DEVICE ID REGISTER
R
R
R
R
R
R
DEV<13:8>
bit 13
R
R
bit 8
R
R
R
R
R
R
DEV<7:0>
bit 7
bit 0
Legend:
R = Readable bit
‘1’ = Bit is set
bit 13-0
‘0’ = Bit is cleared
DEV<13:0>: Device ID bits
Device
DEVID<13:0> Values
PIC16F1703
11 0000 0100 0011 (3043h)
PIC16LF1703
11 0000 0100 0101 (3045h)
PIC16F1707
11 0000 0100 0010 (3042h)
PIC16LF1707
11 0000 0100 0100 (3044h)
REGISTER 4-4:
REVID: REVISION ID REGISTER
R
R
R
R
R
R
REV<13:8>
bit 13
R
R
bit 8
R
R
R
R
R
R
REV<7:0>
bit 7
bit 0
Legend:
R = Readable bit
‘1’ = Bit is set
bit 13-0
‘0’ = Bit is cleared
REV<13:0>: Revision ID bits
DS40001722C-page 52
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
5.0
RESETS
There are multiple ways to reset this device:
•
•
•
•
•
•
•
•
•
A simplified block diagram of the On-Chip Reset Circuit
is shown in Figure 5-1.
Power-On Reset (POR)
Brown-Out Reset (BOR)
Low-Power Brown-Out Reset (LPBOR)
MCLR Reset
WDT Reset
RESET instruction
Stack Overflow
Stack Underflow
Programming mode exit
To allow VDD to stabilize, an optional Power-up Timer
can be enabled to extend the Reset time after a BOR
or POR event.
FIGURE 5-1:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
Rev. 10-000006A
8/14/2013
ICSP™ Programming Mode Exit
RESET Instruction
Stack Underflow
Stack Overlfow
MCLRE
VPP/MCLR
Sleep
WDT
Time-out
Device
Reset
Power-on
Reset
VDD
BOR
Active(1)
Brown-out
Reset
LPBOR
Reset
Note 1:
R
LFINTOSC
Power-up
Timer
PWRTE
See Table 5-1 for BOR active conditions.
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5.1
Power-On Reset (POR)
5.2
Brown-Out Reset (BOR)
The POR circuit holds the device in Reset until VDD has
reached an acceptable level for minimum operation.
Slow rising VDD, fast operating speeds or analog
performance may require greater than minimum VDD.
The PWRT, BOR or MCLR features can be used to
extend the start-up period until all device operation
conditions have been met.
The BOR circuit holds the device in Reset when VDD
reaches a selectable minimum level. Between the
POR and BOR, complete voltage range coverage for
execution protection can be implemented.
5.1.1
•
•
•
•
POWER-UP TIMER (PWRT)
The Power-up Timer provides a nominal 64 ms
time-out on POR or Brown-out Reset.
The device is held in Reset as long as PWRT is active.
The PWRT delay allows additional time for the VDD to
rise to an acceptable level. The Power-up Timer is
enabled by clearing the PWRTE bit in Configuration
Words.
The Power-up Timer starts after the release of the POR
and BOR.
For additional information, refer to Application Note
AN607, “Power-up Trouble Shooting” (DS00607).
TABLE 5-1:
The Brown-out Reset module has four operating
modes controlled by the BOREN<1:0> bits in Configuration Words. The four operating modes are:
BOR is always on
BOR is off when in Sleep
BOR is controlled by software
BOR is always off
Refer to Table 5-1 for more information.
The Brown-out Reset voltage level is selectable by
configuring the BORV bit in Configuration Words.
A VDD noise rejection filter prevents the BOR from
triggering on small events. If VDD falls below VBOR for
a duration greater than parameter TBORDC, the device
will reset. See Figure 5-2 for more information.
BOR OPERATING MODES
BOREN<1:0>
SBOREN
Device Mode
BOR Mode
11
X
X
Active
Awake
Active
10
X
Sleep
Disabled
1
X
Active
0
X
Disabled
X
X
Disabled
01
00
Instruction Execution upon:
Release of POR or Wake-up from Sleep
Waits for BOR ready(1) (BORRDY = 1)
Waits for BOR ready (BORRDY = 1)
Waits for BOR ready(1) (BORRDY = 1)
Begins immediately (BORRDY = x)
Note 1: In these specific cases, “Release of POR” and “Wake-up from Sleep”, there is no delay in start-up. The BOR
ready flag, (BORRDY = 1), will be set before the CPU is ready to execute instructions because the BOR
circuit is forced on by the BOREN<1:0> bits.
5.2.1
BOR IS ALWAYS ON
When the BOREN bits of Configuration Words are
programmed to ‘11’, the BOR is always on. The device
start-up will be delayed until the BOR is ready and VDD
is higher than the BOR threshold.
BOR protection is active during Sleep. The BOR does
not delay wake-up from Sleep.
5.2.2
BOR IS OFF IN SLEEP
When the BOREN bits of Configuration Words are
programmed to ‘10’, the BOR is on, except in Sleep.
The device start-up will be delayed until the BOR is
ready and VDD is higher than the BOR threshold.
5.2.3
BOR CONTROLLED BY SOFTWARE
When the BOREN bits of Configuration Words are
programmed to ‘01’, the BOR is controlled by the
SBOREN bit of the BORCON register. The device
start-up is not delayed by the BOR ready condition or
the VDD level.
BOR protection begins as soon as the BOR circuit is
ready. The status of the BOR circuit is reflected in the
BORRDY bit of the BORCON register.
BOR protection is unchanged by Sleep.
BOR protection is not active during Sleep. The device
wake-up will be delayed until the BOR is ready.
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FIGURE 5-2:
BROWN-OUT SITUATIONS
VDD
VBOR
Internal
Reset
TPWRT(1)
VDD
VBOR
Internal
Reset
< TPWRT
TPWRT(1)
VDD
VBOR
Internal
Reset
Note 1:
5.3
TPWRT(1)
TPWRT delay only if PWRTE bit is programmed to ‘0’.
Register Definitions: BOR Control
REGISTER 5-1:
BORCON: BROWN-OUT RESET CONTROL REGISTER
R/W-1/u
R/W-0/u
U-0
U-0
U-0
U-0
U-0
R-q/u
SBOREN
BORFS(1)
—
—
—
—
—
BORRDY
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = Value depends on condition
bit 7
SBOREN: Software Brown-out Reset Enable bit
If BOREN <1:0> in Configuration Words  01:
SBOREN is read/write, but has no effect on the BOR.
If BOREN <1:0> in Configuration Words = 01:
1 = BOR Enabled
0 = BOR Disabled
bit 6
BORFS: Brown-out Reset Fast Start bit(1)
If BOREN<1:0> = 11 (Always on) or BOREN<1:0> = 00 (Always off)
BORFS is Read/Write, but has no effect.
If BOREN <1:0> = 10 (Disabled in Sleep) or BOREN<1:0> = 01 (Under software control):
1 = Band gap is forced on always (covers sleep/wake-up/operating cases)
0 = Band gap operates normally, and may turn off
bit 5-1
Unimplemented: Read as ‘0’
bit 0
BORRDY: Brown-out Reset Circuit Ready Status bit
1 = The Brown-out Reset circuit is active
0 = The Brown-out Reset circuit is inactive
Note 1:
BOREN<1:0> bits are located in Configuration Words.
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5.4
Low-Power Brown-Out Reset
(LPBOR)
The Low-Power Brown-Out Reset (LPBOR) is an
essential part of the Reset subsystem. Refer to
Figure 5-1 to see how the BOR interacts with other
modules.
The LPBOR is used to monitor the external VDD pin.
When too low of a voltage is detected, the device is
held in Reset. When this occurs, a register bit (BOR) is
changed to indicate that a BOR Reset has occurred.
The same bit is set for both the BOR and the LPBOR.
Refer to Register 5-2.
5.4.1
ENABLING LPBOR
The LPBOR is controlled by the LPBOR bit of
Configuration Words. When the device is erased, the
LPBOR module defaults to disabled.
5.4.1.1
LPBOR Module Output
The output of the LPBOR module is a signal indicating
whether or not a Reset is to be asserted. This signal is
OR’d together with the Reset signal of the BOR
module to provide the generic BOR signal, which goes
to the PCON register and to the power control block.
5.5
MCLR
5.6
Watchdog Timer (WDT) Reset
The Watchdog Timer generates a Reset if the firmware
does not issue a CLRWDT instruction within the time-out
period. The TO and PD bits in the STATUS register are
changed to indicate the WDT Reset. See Section 9.0
“Watchdog Timer (WDT)” for more information.
5.7
RESET Instruction
A RESET instruction will cause a device Reset. The RI
bit in the PCON register will be set to ‘0’. See Table 5-4
for default conditions after a RESET instruction has
occurred.
5.8
Stack Overflow/Underflow Reset
The device can reset when the Stack Overflows or
Underflows. The STKOVF or STKUNF bits of the PCON
register indicate the Reset condition. These Resets are
enabled by setting the STVREN bit in Configuration
Words. See Section 3.6.2 “Overflow/Underflow
Reset” for more information.
5.9
Programming Mode Exit
Upon exit of Programming mode, the device will
behave as if a POR had just occurred.
The MCLR is an optional external input that can reset
the device. The MCLR function is controlled by the
MCLRE bit of Configuration Words and the LVP bit of
Configuration Words (Table 5-2).
5.10
TABLE 5-2:
The Power-up Timer is controlled by the PWRTE bit of
Configuration Words.
MCLR CONFIGURATION
MCLRE
LVP
MCLR
0
0
Disabled
1
0
Enabled
x
1
Enabled
5.5.1
MCLR ENABLED
When MCLR is enabled and the pin is held low, the
device is held in Reset. The MCLR pin is connected to
VDD through an internal weak pull-up.
The device has a noise filter in the MCLR Reset path.
The filter will detect and ignore small pulses.
Note:
5.5.2
A Reset does not drive the MCLR pin low.
MCLR DISABLED
When MCLR is disabled, the pin functions as a general
purpose input and the internal weak pull-up is under
software control. See Section 11.1 “PORTA Registers” for more information.
DS40001722C-page 56
Power-Up Timer
The Power-up Timer optionally delays device execution
after a BOR or POR event. This timer is typically used to
allow VDD to stabilize before allowing the device to start
running.
5.11
Start-up Sequence
Upon the release of a POR or BOR, the following must
occur before the device will begin executing:
1.
2.
3.
Power-up Timer runs to completion (if enabled).
Oscillator start-up timer runs to completion (if
required for oscillator source).
MCLR must be released (if enabled).
The total time-out will vary based on oscillator configuration and Power-up Timer configuration. See
Section 6.0 “Oscillator Module (with Fail-Safe
Clock Monitor)” for more information.
The Power-up Timer and oscillator start-up timer run
independently of MCLR Reset. If MCLR is kept low
long enough, the Power-up Timer and oscillator
start-up timer will expire. Upon bringing MCLR high, the
device will begin execution after 10 FOSC cycles (see
Figure 5-3). This is useful for testing purposes or to
synchronize more than one device operating in parallel.
 2013-2015 Microchip Technology Inc.
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FIGURE 5-3:
RESET START-UP SEQUENCE
VDD
Internal POR
TPWRT
Power-up Timer
MCLR
TMCLR
Internal RESET
Oscillator Modes
Internal Oscillator
Oscillator
FOSC
External Clock (EC)
CLKIN
FOSC
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5.12
Determining the Cause of a Reset
Upon any Reset, multiple bits in the STATUS and
PCON register are updated to indicate the cause of the
Reset. Table 5-3 and Table 5-4 show the Reset
conditions of these registers.
TABLE 5-3:
RESET STATUS BITS AND THEIR SIGNIFICANCE
STKOVF STKUNF RWDT
RMCLR
RI
POR
BOR
TO
PD
Condition
0
0
1
1
1
0
x
1
1
Power-on Reset
0
0
1
1
1
0
x
0
x
Illegal, TO is set on POR
0
0
1
1
1
0
x
x
0
Illegal, PD is set on POR
0
0
u
1
1
u
0
1
1
Brown-out Reset
u
u
0
u
u
u
u
0
u
WDT Reset
u
u
u
u
u
u
u
0
0
WDT Wake-up from Sleep
u
u
u
u
u
u
u
1
0
Interrupt Wake-up from Sleep
u
u
u
0
u
u
u
u
u
MCLR Reset during normal operation
u
u
u
0
u
u
u
1
0
MCLR Reset during Sleep
u
u
u
u
0
u
u
u
u
RESET Instruction Executed
1
u
u
u
u
u
u
u
u
Stack Overflow Reset (STVREN = 1)
u
1
u
u
u
u
u
u
u
Stack Underflow Reset (STVREN = 1)
TABLE 5-4:
RESET CONDITION FOR SPECIAL REGISTERS
Program
Counter
STATUS
Register
PCON
Register
Power-on Reset
0000h
---1 1000
00-- 110x
MCLR Reset during normal operation
0000h
---u uuuu
uu-- 0uuu
MCLR Reset during Sleep
0000h
---1 0uuu
uu-- 0uuu
WDT Reset
0000h
---0 uuuu
uu-- uuuu
WDT Wake-up from Sleep
PC + 1
---0 0uuu
uu-- uuuu
Brown-out Reset
0000h
---1 1uuu
00-- 11u0
---1 0uuu
uu-- uuuu
---u uuuu
uu-- u0uu
Condition
Interrupt Wake-up from Sleep
RESET Instruction Executed
PC + 1
(1)
0000h
Stack Overflow Reset (STVREN = 1)
0000h
---u uuuu
1u-- uuuu
Stack Underflow Reset (STVREN = 1)
0000h
---u uuuu
u1-- uuuu
Legend: u = unchanged, x = unknown, - = unimplemented bit, reads as ‘0’.
Note 1: When the wake-up is due to an interrupt and Global Enable bit (GIE) is set, the return address is pushed on
the stack and PC is loaded with the interrupt vector (0004h) after execution of PC + 1.
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5.13
Power Control (PCON) Register
The PCON register bits are shown in Register 5-2.
The Power Control (PCON) register contains flag bits
to differentiate between a:
•
•
•
•
•
•
•
Power-on Reset (POR)
Brown-out Reset (BOR)
Reset Instruction Reset (RI)
MCLR Reset (RMCLR)
Watchdog Timer Reset (RWDT)
Stack Underflow Reset (STKUNF)
Stack Overflow Reset (STKOVF)
5.14
Register Definitions: Power Control
REGISTER 5-2:
PCON: POWER CONTROL REGISTER
R/W/HS-0/q
R/W/HS-0/q
U-0
STKOVF
STKUNF
—
R/W/HC-1/q R/W/HC-1/q
RWDT
R/W/HC-1/q
R/W/HC-q/u
R/W/HC-q/u
RI
POR
BOR
RMCLR
bit 7
bit 0
Legend:
HC = Bit is cleared by hardware
HS = Bit is set by hardware
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-m/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = Value depends on condition
bit 7
STKOVF: Stack Overflow Flag bit
1 = A Stack Overflow occurred
0 = A Stack Overflow has not occurred or cleared by firmware
bit 6
STKUNF: Stack Underflow Flag bit
1 = A Stack Underflow occurred
0 = A Stack Underflow has not occurred or cleared by firmware
bit 5
Unimplemented: Read as ‘0’
bit 4
RWDT: Watchdog Timer Reset Flag bit
1 = A Watchdog Timer Reset has not occurred or set to ‘1’ by firmware
0 = A Watchdog Timer Reset has occurred (cleared by hardware)
bit 3
RMCLR: MCLR Reset Flag bit
1 = A MCLR Reset has not occurred or set to ‘1’ by firmware
0 = A MCLR Reset has occurred (cleared by hardware)
bit 2
RI: RESET Instruction Flag bit
1 = A RESET instruction has not been executed or set to ‘1’ by firmware
0 = A RESET instruction has been executed (cleared by hardware)
bit 1
POR: Power-on Reset Status bit
1 = No Power-on Reset occurred
0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
bit 0
BOR: Brown-out Reset Status bit
1 = No Brown-out Reset occurred
0 = A Brown-out Reset occurred (must be set in software after a Power-on Reset or Brown-out Reset
occurs)
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TABLE 5-5:
SUMMARY OF REGISTERS ASSOCIATED WITH RESETS
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
BORCON
SBOREN
BORFS
—
—
—
—
—
BORRDY
55
PCON
STKOVF
STKUNF
—
RWDT
RMCLR
RI
POR
BOR
59
STATUS
—
—
—
TO
PD
Z
DC
C
21
WDTCON
—
—
SWDTEN
92
WDTPS<4:0>
Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used by Resets.
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6.0
OSCILLATOR MODULE (WITH
FAIL-SAFE CLOCK MONITOR)
6.1
Overview
The oscillator module has a limited variety of clock
sources and selection features that allow it to be used
in applications while maximizing performance and minimizing power consumption. Figure 6-1 illustrates a
block diagram of the oscillator module.
Clock sources can be supplied from external oscillators,
or one of two internal oscillators and PLL circuits, with a
choice of speeds selectable via software. Additional
clock features include:
• Selectable system clock source between external
or internal sources via software.
The oscillator module can be configured in one of the
following clock modes.
1.
2.
3.
4.
ECL – External Clock Low-Power mode
(0 MHz to 0.5 MHz)
ECM – External Clock Medium Power mode
(0.5 MHz to 4 MHz)
ECH – External Clock High-Power mode
(4 MHz to 32 MHz)
INTOSC – Internal oscillator (31 kHz to 32 MHz)
Clock Source modes are selected by the FOSC<1:0>
bits in the Configuration Words. The FOSC bits
determine the type of oscillator that will be used when
the device is first powered.
The ECH, ECM, and ECL clock modes rely on an
external logic level signal as the device clock source.
Each mode is optimized for a different frequency range.
The INTOSC internal oscillator block produces low,
medium, and high-frequency clock sources,
designated LFINTOSC, MFINTOSC and HFINTOSC.
(see Internal Oscillator Block, Figure 6-1). A wide
selection of device clock frequencies may be derived
from these three clock sources.
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SIMPLIFIED PIC® MCU CLOCK SOURCE BLOCK DIAGRAM
FIGURE 6-1:
Timer1 Clock Source Option
for other modules
T1CKI
T1OSC
01
CLKIN
External
Oscillator
0
Sleep
0
1
00
PRIMUX
4 x PLL
1
PLLMUX
IRCF<3:0>
16 MHz
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz
250 kHz
125 kHz
62.5 kHz
31.25 kHz
500 kHz
Source
16 MHz
(HFINTOSC)
500 kHz
(MFINTOSC)
31 kHz
Source
INTOSC
SCS<1:0>
31 kHz
0000
WDT, PWRT
31 kHz (LFINTOSC)
Inputs
SCS
FOSC<1:0>
PLLEN or
SPLLEN
0
=00
1
=00
≠00
≠00
X
DS40001722C-page 62
0
1X
1111
MUX
HFPLL
Postscaler
Internal
Oscillator
Block
FOSC
To CPU and
Peripherals
Outputs
IRCF
PRIMUX
PLLMUX
x
1
0
=1110
1
1
≠1110
1
0
x
0
0
1
x
0
1
X
X
X
X
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6.2
Clock Source Types
Clock sources can be classified as external or internal.
External clock sources rely on an external clock signal
such as an oscillator module.
Internal clock sources are contained within the
oscillator module. The internal oscillator block has two
internal oscillators and a dedicated Phase-Lock Loop
(HFPLL) that are used to generate three internal
system clock sources: the 16 MHz High-Frequency
Internal Oscillator (HFINTOSC), 500 kHz (MFINTOSC)
and the 31 kHz Low-Frequency Internal Oscillator
(LFINTOSC).
The system clock can be selected between external or
internal clock sources via the System Clock Select
(SCS) bits in the OSCCON register. See Section 6.3
“Clock Switching” for additional information.
6.2.1
EXTERNAL CLOCK SOURCES
There is no delay in operation after a Power-on Reset
(POR) or wake-up from Sleep. Because the PIC® MCU
design is fully static, stopping the external clock input
will have the effect of halting the device while leaving all
data intact. Upon restarting the external clock, the
device will resume operation as if no time had elapsed.
FIGURE 6-2:
Clock from
Ext. System
FOSC/4 or I/O(1)
Note 1:
EXTERNAL CLOCK (EC)
MODE OPERATION
CLKIN
PIC® MCU
CLKOUT
Output depends upon CLKOUTEN bit of the
Configuration Words.
An external clock source can be used as the device
system clock by performing one of the following
actions:
• Program the FOSC<1:0> bits in the Configuration
Words to select an external clock source that will
be used as the default system clock upon a
device Reset.
• Write the SCS<1:0> bits in the OSCCON register
to switch the system clock source to an external
clock source determined by the value of the
FOSC bits.
See Section 6.3 “Clock Switching”for more information.
6.2.1.1
EC Mode
The External Clock (EC) mode allows an externally
generated logic level signal to be the system clock
source. When operating in this mode, an external clock
source is connected to the CLKIN input. CLKOUT is
available for general purpose I/O or CLKOUT.
Figure 6-2 shows the pin connections for EC mode.
EC mode has three power modes to select from through
Configuration Words:
• ECH – High power, 4-32 MHz
• ECM – Medium power, 0.5-4 MHz
• ECL – Low power, 0-0.5 MHz
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6.2.1.2
4x PLL
The oscillator module contains a 4x PLL that can be
used with both external and internal clock sources to
provide a system clock source. The input frequency for
the 4x PLL must fall within specifications. See the PLL
Clock Timing Specifications in Table 26-9.
The 4x PLL may be enabled for use by one of two
methods:
1.
2.
Program the PLLEN bit in Configuration Words
to a ‘1’.
Write the SPLLEN bit in the OSCCON register to
a ‘1’. If the PLLEN bit in Configuration Words is
programmed to a ‘1’, then the value of SPLLEN
is ignored.
6.2.2
INTERNAL CLOCK SOURCES
The device may be configured to use the internal
oscillator block as the system clock by performing one
of the following actions:
• Program the FOSC<1:0> bits in Configuration
Words to select the INTOSC clock source, which
will be used as the default system clock upon a
device Reset.
• Write the SCS<1:0> bits in the OSCCON register
to switch the system clock source to the internal
oscillator during run-time. See Section 6.3
“Clock Switching” for more information.
In INTOSC mode, CLKIN is available for general
purpose I/O. CLKOUT is available for general purpose
I/O or CLKOUT.
The function of the CLKOUT pin is determined by the
CLKOUTEN bit in Configuration Words.
The internal oscillator block has two independent
oscillators and a dedicated Phase-Lock Loop, HFPLL
that can produce one of three internal system clock
sources.
1.
2.
3.
The HFINTOSC (High-Frequency Internal
Oscillator) is factory calibrated and operates at
16 MHz. The HFINTOSC source is generated
from the 500 kHz MFINTOSC source and the
dedicated Phase-Lock Loop, HFPLL. The
frequency of the HFINTOSC can be
user-adjusted via software using the OSCTUNE
register (Register 6-3).
The MFINTOSC (Medium-Frequency Internal
Oscillator) is factory calibrated and operates at
500 kHz. The frequency of the MFINTOSC can
be user-adjusted via software using the
OSCTUNE register (Register 6-3).
The LFINTOSC (Low-Frequency Internal
Oscillator) is uncalibrated and operates at
31 kHz.
DS40001722C-page 64
6.2.2.1
HFINTOSC
The High-Frequency Internal Oscillator (HFINTOSC) is
a factory calibrated 16 MHz internal clock source. The
frequency of the HFINTOSC can be altered via
software using the OSCTUNE register (Register 6-3).
The output of the HFINTOSC connects to a postscaler
and multiplexer (see Figure 6-1). One of multiple
frequencies derived from the HFINTOSC can be
selected via software using the IRCF<3:0> bits of the
OSCCON register. See Section 6.2.2.7 “Internal
Oscillator Clock Switch Timing” for more information.
The HFINTOSC is enabled by:
• Configure the IRCF<3:0> bits of the OSCCON
register for the desired HF frequency, and
• FOSC<1:0> = 00, or
• Set the System Clock Source (SCS) bits of the
OSCCON register to ‘1x’
A fast start-up oscillator allows internal circuits to power
up and stabilize before switching to HFINTOSC.
The High-Frequency Internal Oscillator Ready bit
(HFIOFR) of the OSCSTAT register indicates when the
HFINTOSC is running.
The High-Frequency Internal Oscillator Status Locked
bit (HFIOFL) of the OSCSTAT register indicates when
the HFINTOSC is running within 2% of its final value.
The High-Frequency Internal Oscillator Stable bit
(HFIOFS) of the OSCSTAT register indicates when the
HFINTOSC is running within 0.5% of its final value.
6.2.2.2
MFINTOSC
The
Medium-Frequency
Internal
Oscillator
(MFINTOSC) is a factory calibrated 500 kHz internal
clock source. The frequency of the MFINTOSC can be
altered via software using the OSCTUNE register
(Register 6-3).
The output of the MFINTOSC connects to a postscaler
and multiplexer (see Figure 6-1). One of nine
frequencies derived from the MFINTOSC can be
selected via software using the IRCF<3:0> bits of the
OSCCON register. See Section 6.2.2.7 “Internal
Oscillator Clock Switch Timing” for more information.
The MFINTOSC is enabled by:
• Configure the IRCF<3:0> bits of the OSCCON
register for the desired HF frequency, and
• FOSC<1:0> = 00, or
• Set the System Clock Source (SCS) bits of the
OSCCON register to ‘1x’
The Medium-Frequency Internal Oscillator Ready bit
(MFIOFR) of the OSCSTAT register indicates when the
MFINTOSC is running.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
6.2.2.3
Internal Oscillator Frequency
Adjustment
The 500 kHz internal oscillator is factory calibrated.
This internal oscillator can be adjusted in software by
writing to the OSCTUNE register (Register 6-3). Since
the HFINTOSC and MFINTOSC clock sources are
derived from the 500 kHz internal oscillator a change in
the OSCTUNE register value will apply to both.
The default value of the OSCTUNE register is ‘0’. The
value is a 6-bit two’s complement number. A value of
1Fh will provide an adjustment to the maximum
frequency. A value of 20h will provide an adjustment to
the minimum frequency.
When the OSCTUNE register is modified, the oscillator
frequency will begin shifting to the new frequency. Code
execution continues during this shift. There is no
indication that the shift has occurred.
OSCTUNE does not affect the LFINTOSC frequency.
Operation of features that depend on the LFINTOSC
clock source frequency, such as the Power-up Timer
(PWRT), Watchdog Timer (WDT), Fail-Safe Clock
Monitor (FSCM) and peripherals, are not affected by the
change in frequency.
6.2.2.4
LFINTOSC
The Low-Frequency Internal Oscillator (LFINTOSC) is
an uncalibrated 31 kHz internal clock source.
The output of the LFINTOSC connects to a multiplexer
(see Figure 6-1). Select 31 kHz, via software, using the
IRCF<3:0> bits of the OSCCON register. See
Section 6.2.2.7 “Internal Oscillator Clock Switch
Timing” for more information. The LFINTOSC is also
the frequency for the Power-up Timer (PWRT),
Watchdog Timer (WDT) and Fail-Safe Clock Monitor
(FSCM).
The LFINTOSC is enabled by selecting 31 kHz
(IRCF<3:0> bits of the OSCCON register = 000) as the
system clock source (SCS bits of the OSCCON
register = 1x), or when any of the following are
enabled:
6.2.2.5
Internal Oscillator Frequency
Selection
The system clock speed can be selected via software
using the Internal Oscillator Frequency Select bits
IRCF<3:0> of the OSCCON register.
The postscaled output of the 16 MHz HFINTOSC,
500 kHz MFINTOSC, and 31 kHz LFINTOSC connect
to a multiplexer (see Figure 6-1). The Internal Oscillator
Frequency Select bits IRCF<3:0> of the OSCCON
register select the frequency output of the internal
oscillators. One of the following frequencies can be
selected via software:
-
32 MHz (requires 4x PLL)
16 MHz
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz (default after Reset)
250 kHz
125 kHz
62.5 kHz
31.25 kHz
31 kHz (LFINTOSC)
Note:
Following any Reset, the IRCF<3:0> bits
of the OSCCON register are set to ‘0111’
and the frequency selection is set to
500 kHz. The user can modify the IRCF
bits to select a different frequency.
The IRCF<3:0> bits of the OSCCON register allow
duplicate selections for some frequencies. These
duplicate choices can offer system design trade-offs.
Lower power consumption can be obtained when
changing oscillator sources for a given frequency.
Faster transition times can be obtained between
frequency changes that use the same oscillator source.
• Configure the IRCF<3:0> bits of the OSCCON
register for the desired LF frequency, and
• FOSC<1:0> = 00, or
• Set the System Clock Source (SCS) bits of the
OSCCON register to ‘1x’
Peripherals that use the LFINTOSC are:
• Power-up Timer (PWRT)
• Watchdog Timer (WDT)
• Fail-Safe Clock Monitor (FSCM)
The Low-Frequency Internal Oscillator Ready bit
(LFIOFR) of the OSCSTAT register indicates when the
LFINTOSC is running.
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6.2.2.6
32 MHz Internal Oscillator
Frequency Selection
The Internal Oscillator Block can be used with the
4x PLL associated with the External Oscillator Block to
produce a 32 MHz internal system clock source. The
following settings are required to use the 32 MHz
internal clock source:
• The FOSC bits in Configuration Words must be
set to use the INTOSC source as the device
system clock (FOSC<1:0> = 00).
• The SCS bits in the OSCCON register must be
cleared to use the clock determined by
FOSC<1:0> in Configuration Words
(SCS<1:0> = 00).
• The IRCF bits in the OSCCON register must be
set to the 8 MHz HFINTOSC set to use
(IRCF<3:0> = 1110).
• The SPLLEN bit in the OSCCON register must be
set to enable the 4x PLL, or the PLLEN bit of the
Configuration Words must be programmed to a
‘1’.
Note:
When using the PLLEN bit of the
Configuration Words, the 4x PLL cannot
be disabled by software and the SPLLEN
option will not be available.
The 4x PLL is not available for use with the internal
oscillator when the SCS bits of the OSCCON register
are set to ‘1x’. The SCS bits must be set to ‘00’ to use
the 4x PLL with the internal oscillator.
DS40001722C-page 66
6.2.2.7
Internal Oscillator Clock Switch
Timing
When switching between the HFINTOSC, MFINTOSC
and the LFINTOSC, the new oscillator may already be
shut down to save power (see Figure 6-3). If this is the
case, there is a delay after the IRCF<3:0> bits of the
OSCCON register are modified before the frequency
selection takes place. The OSCSTAT register will
reflect the current active status of the HFINTOSC,
MFINTOSC and LFINTOSC oscillators. The sequence
of a frequency selection is as follows:
1.
2.
3.
4.
5.
6.
7.
IRCF<3:0> bits of the OSCCON register are
modified.
If the new clock is shut down, a clock start-up
delay is started.
Clock switch circuitry waits for a falling edge of
the current clock.
The current clock is held low and the clock
switch circuitry waits for a rising edge in the new
clock.
The new clock is now active.
The OSCSTAT register is updated as required.
Clock switch is complete.
See Figure 6-3 for more details.
If the internal oscillator speed is switched between two
clocks of the same source, there is no start-up delay
before the new frequency is selected. Clock switching
time delays are shown in Table 6-1.
Start-up delay specifications are located in the
oscillator tables of Section 26.0 “Electrical
Specifications”.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 6-3:
HFINTOSC/
MFINTOSC
INTERNAL OSCILLATOR SWITCH TIMING
LFINTOSC (FSCM and WDT disabled)
HFINTOSC/
MFINTOSC
Oscillator Delay(1)
Start-up Time
2-cycle Sync
Running
LFINTOSC
IRCF <3:0>
0
0
System Clock
HFINTOSC/
MFINTOSC
LFINTOSC (Either FSCM or WDT enabled)
HFINTOSC/
MFINTOSC
2-cycle Sync
Running
LFINTOSC
0
IRCF <3:0>
0
System Clock
LFINTOSC
HFINTOSC/MFINTOSC
LFINTOSC turns off unless WDT or FSCM is enabled
LFINTOSC
Oscillator Delay(1)
Start-up Time
2-cycle Sync
Running
HFINTOSC/
MFINTOSC
IRCF <3:0>
=0
0
System Clock
Note 1: See Table 6-1, Oscillator Switching Delays, for more information.
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6.3
Clock Switching
The system clock source can be switched between
external and internal clock sources via software using
the System Clock Select (SCS) bits of the OSCCON
register. The following clock sources can be selected
using the SCS bits:
When switching between clock sources, a delay is
required to allow the new clock to stabilize. These
oscillator delays are shown in Table 6-1.
• Default system oscillator determined by FOSC
bits in Configuration Words
• Timer1 32 kHz crystal oscillator
• Internal Oscillator Block (INTOSC)
6.3.1
SYSTEM CLOCK SELECT (SCS)
BITS
The System Clock Select (SCS) bits of the OSCCON
register select the system clock source that is used for
the CPU and peripherals.
• When the SCS bits of the OSCCON register = 00,
the system clock source is determined by the
value of the FOSC<1:0> bits in the Configuration
Words.
• When the SCS bits of the OSCCON register = 01,
the system clock source is the secondary oscillator.
• When the SCS bits of the OSCCON register = 1x,
the system clock source is chosen by the internal
oscillator frequency selected by the IRCF<3:0> bits
of the OSCCON register. After a Reset, the SCS
bits of the OSCCON register are always cleared.
Note:
Any automatic clock switch, which may
occur from Two-Speed Start-up or
Fail-Safe Clock Monitor, does not update
the SCS bits of the OSCCON register. The
user can monitor the OSTS bit of the
OSCSTAT register to determine the current
system clock source.
TABLE 6-1:
OSCILLATOR SWITCHING DELAYS
Switch From
Switch To
Frequency
Oscillator Delay
LFINTOSC(1)
Sleep/POR
MFINTOSC(1)
HFINTOSC(1)
31 kHz
31.25 kHz-500 kHz
31.25 kHz-16 MHz
2 cycles
Sleep/POR
EC
DC – 32 MHz
2 cycles
LFINTOSC
EC
DC – 32 MHz
1 cycle of each
Any clock source
MFINTOSC(1)
HFINTOSC(1)
31.25 kHz-500 kHz
31.25 kHz-16 MHz
2 s (approx.)
Any clock source
LFINTOSC(1)
31 kHz
1 cycle of each
PLL inactive
PLL active
16-32 MHz
2 ms (approx.)
Note 1:
PLL inactive.
DS40001722C-page 68
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6.4
Register Definitions: Oscillator Control
REGISTER 6-1:
R/W-0/0
OSCCON: OSCILLATOR CONTROL REGISTER
R/W-0/0
R/W-1/1
SPLLEN
R/W-1/1
R/W-1/1
IRCF<3:0>
U-0
R/W-0/0
—
R/W-0/0
SCS<1:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
SPLLEN: Software PLL Enable bit
If PLLEN in Configuration Words = 1:
SPLLEN bit is ignored. 4x PLL is always enabled (subject to oscillator requirements)
If PLLEN in Configuration Words = 0:
1 = 4x PLL Is enabled
0 = 4x PLL is disabled
bit 6-3
IRCF<3:0>: Internal Oscillator Frequency Select bits
1111 = 16 MHz HF
1110 = 8 MHz or 32 MHz HF(2)
1101 = 4 MHz HF
1100 = 2 MHz HF
1011 = 1 MHz HF
1010 = 500 kHz HF(1)
1001 = 250 kHz HF(1)
1000 = 125 kHz HF(1)
0111 = 500 kHz MF (default upon Reset)
0110 = 250 kHz MF
0101 = 125 kHz MF
0100 = 62.5 kHz MF
0011 = 31.25 kHz HF(1)
0010 = 31.25 kHz MF
000x = 31 kHz LF
bit 2
Unimplemented: Read as ‘0’
bit 1-0
SCS<1:0>: System Clock Select bits
1x = Internal oscillator block
01 =Reserved
00 = Clock determined by FOSC<1:0> in Configuration Words
Note 1:
2:
Duplicate frequency derived from HFINTOSC.
32 MHz when SPLLEN bit is set. Refer to Section 6.2.2.6 “32 MHz Internal Oscillator Frequency
Selection”.
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REGISTER 6-2:
OSCSTAT: OSCILLATOR STATUS REGISTER
U-0
R-0/q
R-q/q
R-0/q
R-0/q
R-q/q
R-0/0
R-0/q
—
PLLR
OSTS
HFIOFR
HFIOFL
MFIOFR
LFIOFR
HFIOFS
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = Conditional
bit 7
Unimplemented: Read as ‘0’
bit 6
PLLR 4x PLL Ready bit
1 = 4x PLL is ready
0 = 4x PLL is not ready
bit 5
OSTS: Oscillator Start-up Timer Status bit
1 = Running from the clock defined by the FOSC<1:0> bits of the Configuration Words
0 = Running from an internal oscillator (FOSC<1:0> = 00)
bit 4
HFIOFR: High-Frequency Internal Oscillator Ready bit
1 = HFINTOSC is ready
0 = HFINTOSC is not ready
bit 3
HFIOFL: High-Frequency Internal Oscillator Locked bit
1 = HFINTOSC is at least 2% accurate
0 = HFINTOSC is not 2% accurate
bit 2
MFIOFR: Medium-Frequency Internal Oscillator Ready bit
1 = MFINTOSC is ready
0 = MFINTOSC is not ready
bit 1
LFIOFR: Low-Frequency Internal Oscillator Ready bit
1 = LFINTOSC is ready
0 = LFINTOSC is not ready
bit 0
HFIOFS: High-Frequency Internal Oscillator Stable bit
1 = HFINTOSC is at least 0.5% accurate
0 = HFINTOSC is not 0.5% accurate
DS40001722C-page 70
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REGISTER 6-3:
OSCTUNE: OSCILLATOR TUNING REGISTER
U-0
U-0
—
—
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
TUN<5:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
TUN<5:0>: Frequency Tuning bits
100000 = Minimum frequency
•
•
•
111111 =
000000 = Oscillator module is running at the factory-calibrated frequency
000001 =
•
•
•
011110 =
011111 = Maximum frequency
TABLE 6-2:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 0
Register
on Page
OSCCON
SPLLEN
OSCSTAT
—
PLLR
OSCTUNE
—
—
PIR2
—
—
—
—
BCL1IF
—
—
CCP2IF
82
—
—
—
—
BCL1IE
—
—
CCP2IE
79
PIE2
Legend:
CONFIG1
CONFIG2
Legend:
OSTS
—
HFIOFR
HFIOFL
SCS<1:0>
MFIOFR
LFIOFR
69
HFIOFS
70
TUN<5:0>
71
— = unimplemented location, read as ‘0’. Shaded cells are not used by clock sources.
TABLE 6-3:
Name
IRCF<3:0>
Bit 1
Bits
SUMMARY OF CONFIGURATION BITS ASSOCIATED WITH CLOCK SOURCES
Bit -/7
Bit -/6
Bit 13/5
Bit 12/4
Bit 11/3
—
CLKOUTEN
Bit 10/2
13:8
—
—
—
7:0
CP
MCLRE
PWRTE
13:8
—
—
LVP
DEBUG
LPBOR
BORV
7:0
ZCDDIS
—
—
—
—
PPS1WAY
WDTE<1:0>
Bit 9/1
BOREN<1:0>
Bit 8/0
—
FOSC<1:0>
—
STVREN
PLLEN
WRT<1:0>
Register
on Page
49
50
— = unimplemented location, read as ‘0’. Shaded cells are not used by clock sources.
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7.0
INTERRUPTS
The interrupt feature allows certain events to preempt
normal program flow. Firmware is used to determine
the source of the interrupt and act accordingly. Some
interrupts can be configured to wake the MCU from
Sleep mode.
This chapter contains the following information for
Interrupts:
•
•
•
•
•
Operation
Interrupt Latency
Interrupts During Sleep
INT Pin
Automatic Context Saving
Many peripherals produce interrupts. Refer to the
corresponding chapters for details.
A block diagram of the interrupt logic is shown in
Figure 7-1.
FIGURE 7-1:
INTERRUPT LOGIC
TMR0IF
TMR0IE
Peripheral Interrupts
(TMR1IF) PIR1<0>
(TMR1IE) PIE1<0>
Wake-up
(If in Sleep mode)
INTF
INTE
IOCIF
IOCIE
Interrupt
to CPU
PEIE
PIRn<7>
PIEn<7>
DS40001722C-page 72
GIE
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7.1
Operation
Interrupts are disabled upon any device Reset. They
are enabled by setting the following bits:
• GIE bit of the INTCON register
• Interrupt Enable bit(s) for the specific interrupt
event(s)
• PEIE bit of the INTCON register (if the Interrupt
Enable bit of the interrupt event is contained in the
PIE1 or PIE2 registers)
7.2
Interrupt Latency
Interrupt latency is defined as the time from when the
interrupt event occurs to the time code execution at the
interrupt vector begins. The latency for synchronous
interrupts is three or four instruction cycles. For
asynchronous interrupts, the latency is three to five
instruction cycles, depending on when the interrupt
occurs. See Figure 7-2 and Figure 7-3 for more details.
The INTCON, PIR1 and PIR2 registers record individual interrupts via interrupt flag bits. Interrupt flag bits will
be set, regardless of the status of the GIE, PEIE and
individual interrupt enable bits.
The following events happen when an interrupt event
occurs while the GIE bit is set:
• Current prefetched instruction is flushed
• GIE bit is cleared
• Current Program Counter (PC) is pushed onto the
stack
• Critical registers are automatically saved to the
shadow registers (See “Section 7.5 “Automatic
Context Saving”)
• PC is loaded with the interrupt vector 0004h
The firmware within the Interrupt Service Routine (ISR)
should determine the source of the interrupt by polling
the interrupt flag bits. The interrupt flag bits must be
cleared before exiting the ISR to avoid repeated
interrupts. Because the GIE bit is cleared, any interrupt
that occurs while executing the ISR will be recorded
through its interrupt flag, but will not cause the
processor to redirect to the interrupt vector.
The RETFIE instruction exits the ISR by popping the
previous address from the stack, restoring the saved
context from the shadow registers and setting the GIE
bit.
For additional information on a specific interrupt’s
operation, refer to its peripheral chapter.
Note 1: Individual interrupt flag bits are set,
regardless of the state of any other
enable bits.
2: All interrupts will be ignored while the GIE
bit is cleared. Any interrupt occurring
while the GIE bit is clear will be serviced
when the GIE bit is set again.
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PIC16(L)F1703/7
FIGURE 7-2:
INTERRUPT LATENCY
F OSC
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
CLKR
Interrupt Sampled
during Q1
Interrupt
GIE
PC
Execute
PC-1
PC
1 Cycle Instruction at PC
PC+1
0004h
0005h
NOP
NOP
Inst(0004h)
PC+1/FSR
ADDR
New PC/
PC+1
0004h
0005h
Inst(PC)
NOP
NOP
Inst(0004h)
FSR ADDR
PC+1
PC+2
0004h
0005h
INST(PC)
NOP
NOP
NOP
Inst(0004h)
Inst(0005h)
FSR ADDR
PC+1
0004h
0005h
INST(PC)
NOP
NOP
Inst(0004h)
Inst(PC)
Interrupt
GIE
PC
Execute
PC-1
PC
2 Cycle Instruction at PC
Interrupt
GIE
PC
Execute
PC-1
PC
3 Cycle Instruction at PC
Interrupt
GIE
PC
Execute
PC-1
PC
3 Cycle Instruction at PC
DS40001722C-page 74
PC+2
NOP
NOP
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FIGURE 7-3:
INT PIN INTERRUPT TIMING
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
FOSC
CLKOUT (3)
(4)
INT pin
(1)
(1)
INTF
Interrupt Latency (2)
(5)
GIE
INSTRUCTION FLOW
PC
Instruction
Fetched
Instruction
Executed
Note 1:
PC
Inst (PC)
Inst (PC – 1)
PC + 1
Inst (PC + 1)
Inst (PC)
PC + 1
—
Forced NOP
0004h
Inst (0004h)
Forced NOP
0005h
Inst (0005h)
Inst (0004h)
INTF flag is sampled here (every Q1).
2:
Asynchronous interrupt latency = 3-5 TCY. Synchronous latency = 3-4 TCY, where TCY = instruction cycle time.
Latency is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.
3:
CLKOUT not available in all oscillator modes.
4:
For minimum width of INT pulse, refer to AC specifications in Section 26.0 “Electrical Specifications””.
5:
INTF is enabled to be set any time during the Q4-Q1 cycles.
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7.3
Interrupts During Sleep
Some interrupts can be used to wake from Sleep. To
wake from Sleep, the peripheral must be able to
operate without the system clock. The interrupt source
must have the appropriate Interrupt Enable bit(s) set
prior to entering Sleep.
On waking from Sleep, if the GIE bit is also set, the
processor will branch to the interrupt vector. Otherwise,
the processor will continue executing instructions after
the SLEEP instruction. The instruction directly after the
SLEEP instruction will always be executed before
branching to the ISR. Refer to Section 8.0
“Power-Down Mode (Sleep)” for more details.
7.4
INT Pin
The INT pin can be used to generate an asynchronous
edge-triggered interrupt. This interrupt is enabled by
setting the INTE bit of the INTCON register. The
INTEDG bit of the OPTION_REG register determines on
which edge the interrupt will occur. When the INTEDG
bit is set, the rising edge will cause the interrupt. When
the INTEDG bit is clear, the falling edge will cause the
interrupt. The INTF bit of the INTCON register will be set
when a valid edge appears on the INT pin. If the GIE and
INTE bits are also set, the processor will redirect
program execution to the interrupt vector.
7.5
Automatic Context Saving
Upon entering an interrupt, the return PC address is
saved on the stack. Additionally, the following registers
are automatically saved in the shadow registers:
•
•
•
•
•
W register
STATUS register (except for TO and PD)
BSR register
FSR registers
PCLATH register
Upon exiting the Interrupt Service Routine, these registers are automatically restored. Any modifications to
these registers during the ISR will be lost. If modifications to any of these registers are desired, the corresponding shadow register should be modified and the
value will be restored when exiting the ISR. The
shadow registers are available in Bank 31 and are
readable and writable. Depending on the user’s
application, other registers may also need to be saved.
DS40001722C-page 76
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7.6
Register Definitions: Interrupt Control
REGISTER 7-1:
INTCON: INTERRUPT CONTROL REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R-0/0
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF(1)
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
GIE: Global Interrupt Enable bit
1 = Enables all active interrupts
0 = Disables all interrupts
bit 6
PEIE: Peripheral Interrupt Enable bit
1 = Enables all active peripheral interrupts
0 = Disables all peripheral interrupts
bit 5
TMR0IE: Timer0 Overflow Interrupt Enable bit
1 = Enables the Timer0 interrupt
0 = Disables the Timer0 interrupt
bit 4
INTE: INT External Interrupt Enable bit
1 = Enables the INT external interrupt
0 = Disables the INT external interrupt
bit 3
IOCIE: Interrupt-on-Change Enable bit
1 = Enables the interrupt-on-change
0 = Disables the interrupt-on-change
bit 2
TMR0IF: Timer0 Overflow Interrupt Flag bit
1 = TMR0 register has overflowed
0 = TMR0 register did not overflow
bit 1
INTF: INT External Interrupt Flag bit
1 = The INT external interrupt occurred
0 = The INT external interrupt did not occur
bit 0
IOCIF: Interrupt-on-Change Interrupt Flag bit(1)
1 = When at least one of the interrupt-on-change pins changed state
0 = None of the interrupt-on-change pins have changed state
Note 1:
Note:
The IOCIF Flag bit is read-only and cleared when all the interrupt-on-change flags in the IOCxF registers
have been cleared by software.
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Enable bit, GIE, of the INTCON register.
User software should ensure the
appropriate interrupt flag bits are clear
prior to enabling an interrupt.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 77
PIC16(L)F1703/7
REGISTER 7-2:
PIE1: PERIPHERAL INTERRUPT ENABLE REGISTER 1
R/W-0/0
R/W-0/0
U-0
U-0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
TMR1GIE: Timer1 Gate Interrupt Enable bit
1 = Enables the Timer1 gate acquisition interrupt
0 = Disables the Timer1 gate acquisition interrupt
bit 6
ADIE: Analog-to-Digital Converter (ADC) Interrupt Enable bit
1 = Enables the ADC interrupt
0 = Disables the ADC interrupt
bit 5-4
Unimplemented: Read as ‘0’
bit 3
SSP1IE: Synchronous Serial Port (MSSP) Interrupt Enable bit
1 = Enables the MSSP interrupt
0 = Disables the MSSP interrupt
bit 2
CCP1IE: CCP1 Interrupt Enable bit
1 = Enables the CCP1 interrupt
0 = Disables the CCP1 interrupt
bit 1
TMR2IE: TMR2 to PR2 Match Interrupt Enable bit
1 = Enables the Timer2 to PR2 match interrupt
0 = Disables the Timer2 to PR2 match interrupt
bit 0
TMR1IE: Timer1 Overflow Interrupt Enable bit
1 = Enables the Timer1 overflow interrupt
0 = Disables the Timer1 overflow interrupt
Note:
Bit PEIE of the INTCON register must be
set to enable any peripheral interrupt.
DS40001722C-page 78
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
REGISTER 7-3:
U-0
PIE2: PERIPHERAL INTERRUPT ENABLE REGISTER 2
U-0
—
U-0
—
—
U-0
R/W-0/0
U-0
U-0
R/W-0/0
—
BCL1IE
—
—
CCP2IE
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
Unimplemented: Read as ‘0’
bit 3
BCL1IE: MSSP Bus Collision Interrupt Enable bit
1 = Enables the MSSP Bus Collision Interrupt
0 = Disables the MSSP Bus Collision Interrupt
bit 2-1
Unimplemented: Read as ‘0’
bit 0
CCP2IE: CCP2 Interrupt Enable bit
1 = Enables the CCP2 interrupt
0 = Disables the CCP2 interrupt
Note:
Bit PEIE of the INTCON register must be
set to enable any peripheral interrupt.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 79
PIC16(L)F1703/7
REGISTER 7-4:
U-0
PIE3: PERIPHERAL INTERRUPT ENABLE REGISTER 3
U-0
—
—
U-0
R/W-0/0
U-0
U-0
U-0
U-0
—
ZCDIE
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-5
Unimplemented: Read as ‘0’
bit 4
ZCDIE: Zero-Cross Detection Interrupt Enable bit
1 = ZCD interrupt enabled
0 = ZCD interrupt disabled
bit 3-0
Unimplemented: Read as ‘0’
Note:
Bit PEIE of the INTCON register must be
set to enable any peripheral interrupt.
DS40001722C-page 80
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PIC16(L)F1703/7
REGISTER 7-5:
PIR1: PERIPHERAL INTERRUPT REQUEST REGISTER 1
R/W-0/0
R/W-0/0
TMR1GIF
ADIF
U-0
—
U-0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
TMR1GIF: Timer1 Gate Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 6
ADIF: Analog-to-Digital Converter (ADC) Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 5-4
Unimplemented: Read as ‘0’
bit 3
SSP1IF: Synchronous Serial Port (MSSP) Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 2
CCP1IF: CCP1 Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 1
TMR2IF: Timer2 to PR2 Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 0
TMR1IF: Timer1 Overflow Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
Note:
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Enable bit, GIE, of the INTCON register.
User software should ensure the
appropriate interrupt flag bits are clear
prior to enabling an interrupt.
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DS40001722C-page 81
PIC16(L)F1703/7
REGISTER 7-6:
U-0
PIR2: PERIPHERAL INTERRUPT REQUEST REGISTER 2
U-0
—
—
U-0
—
U-0
R/W-0/0
U-0
U-0
R/W-0/0
—
BCL1IF
—
—
CCP2IF
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
Unimplemented: Read as ‘0’
bit 3
BCL1IF: MSSP Bus Collision Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 2-1
Unimplemented: Read as ‘0’
bit 0
CCP2IF: CCP2 Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
Note:
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Enable bit, GIE, of the INTCON register.
User software should ensure the
appropriate interrupt flag bits are clear
prior to enabling an interrupt.
DS40001722C-page 82
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
REGISTER 7-7:
U-0
PIR3: PERIPHERAL INTERRUPT REQUEST REGISTER 3
U-0
—
—
U-0
R/W-0/0
U-0
U-0
U-0
U-0
—
ZCDIF
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-5
Unimplemented: Read as ‘0’
bit 4
ZCDIF: Zero-Cross Detection Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 3-0
Unimplemented: Read as ‘0’
Note:
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Enable bit, GIE, of the INTCON register.
User software should ensure the
appropriate interrupt flag bits are clear
prior to enabling an interrupt.
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PIC16(L)F1703/7
TABLE 7-1:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPTS
Bit 7
INTCON
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
TMR0IF
Bit 1
Bit 0
INTF
IOCIF
Register
on Page
GIE
PEIE
TMR0IE
INTE
IOCIE
WPUEN
INTEDG
TMR0CS
TMR0SE
PSA
PIE1
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
PIE2
—
—
—
—
BCL1IE
—
—
CCP2IE
79
OPTION_REG
PS<2:0>
77
168
PIE3
—
—
—
ZCDIE
—
—
—
—
80
PIR1
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
81
PIR2
—
—
—
—
BCL1IF
—
—
CCP2IF
82
PIR3
—
—
—
ZCDIF
—
—
—
—
83
Legend:
— = unimplemented location, read as ‘0’. Shaded cells are not used by interrupts.
DS40001722C-page 84
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PIC16(L)F1703/7
8.0
POWER-DOWN MODE (SLEEP)
8.1
Wake-up from Sleep
The Power-down mode is entered by executing a
SLEEP instruction.
The device can wake-up from Sleep through one of the
following events:
Upon entering Sleep mode, the following conditions
exist:
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
5.
6.
7.
8.
9.
WDT will be cleared but keeps running, if
enabled for operation during Sleep.
PD bit of the STATUS register is cleared.
TO bit of the STATUS register is set.
CPU clock is disabled.
31 kHz LFINTOSC is unaffected and peripherals
that operate from it may continue operation in
Sleep.
Timer1 and peripherals that operate from
Timer1 continue operation in Sleep when the
Timer1 clock source selected is:
• LFINTOSC
• T1CKI
• Secondary oscillator
ADC is unaffected, if the dedicated FRC
oscillator is selected.
I/O ports maintain the status they had before
SLEEP was executed (driving high, low or
high-impedance).
Resets other than WDT are not affected by
Sleep mode.
Refer to individual chapters for more details on
peripheral operation during Sleep.
To minimize current consumption, the following
conditions should be considered:
•
•
•
•
•
External Reset input on MCLR pin, if enabled
BOR Reset, if enabled
POR Reset
Watchdog Timer, if enabled
Any external interrupt
Interrupts by peripherals capable of running
during Sleep (see individual peripheral for more
information)
The first three events will cause a device Reset. The
last three events are considered a continuation of
program execution. To determine whether a device
Reset or wake-up event occurred, refer to
Section 5.12 “Determining the Cause of a Reset”.
When the SLEEP instruction is being executed, the next
instruction (PC + 1) is prefetched. For the device to
wake-up through an interrupt event, the corresponding
interrupt enable bit must be enabled. Wake-up will
occur regardless of the state of the GIE bit. If the GIE
bit is disabled, the device continues execution at the
instruction after the SLEEP instruction. If the GIE bit is
enabled, the device executes the instruction after the
SLEEP instruction, the device will then call the Interrupt
Service Routine. In cases where the execution of the
instruction following SLEEP is not desirable, the user
should have a NOP after the SLEEP instruction.
The WDT is cleared when the device wakes up from
Sleep, regardless of the source of wake-up.
I/O pins should not be floating
External circuitry sinking current from I/O pins
Internal circuitry sourcing current from I/O pins
Current draw from pins with internal weak pull-ups
Modules using 31 kHz LFINTOSC
I/O pins that are high-impedance inputs should be
pulled to VDD or VSS externally to avoid switching
currents caused by floating inputs.
Examples of internal circuitry that might be sourcing
current include the FVR module. See Section 14.0
“Fixed Voltage Reference (FVR)” for more
information on the FVR module.
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DS40001722C-page 85
PIC16(L)F1703/7
8.1.1
WAKE-UP USING INTERRUPTS
When global interrupts are disabled (GIE cleared) and
any interrupt source has both its interrupt enable bit
and interrupt flag bit set, one of the following will occur:
• If the interrupt occurs before the execution of a
SLEEP instruction
- SLEEP instruction will execute as a NOP
- WDT and WDT prescaler will not be cleared
- TO bit of the STATUS register will not be set
- PD bit of the STATUS register will not be
cleared
FIGURE 8-1:
• If the interrupt occurs during or after the execution of a SLEEP instruction
- SLEEP instruction will be completely
executed
- Device will immediately wake-up from Sleep
- WDT and WDT prescaler will be cleared
- TO bit of the STATUS register will be set
- PD bit of the STATUS register will be cleared
Even if the flag bits were checked before executing a
SLEEP instruction, it may be possible for flag bits to
become set before the SLEEP instruction completes. To
determine whether a SLEEP instruction executed, test
the PD bit. If the PD bit is set, the SLEEP instruction
was executed as a NOP.
WAKE-UP FROM SLEEP THROUGH INTERRUPT
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
CLKIN(1)
TOST(3)
CLKOUT(2)
Interrupt flag
Interrupt Latency (4)
GIE bit
(INTCON reg.)
Instruction Flow
PC
Instruction
Fetched
Instruction
Executed
Note
1:
2:
3:
4:
Processor in
Sleep
PC
Inst(PC) = Sleep
Inst(PC - 1)
PC + 1
PC + 2
PC + 2
Inst(PC + 1)
Inst(PC + 2)
Sleep
Inst(PC + 1)
PC + 2
Forced NOP
0004h
0005h
Inst(0004h)
Inst(0005h)
Forced NOP
Inst(0004h)
External clock. High, Medium, Low mode assumed.
CLKOUT is shown here for timing reference.
TOST = 1024 TOSC. This delay does not apply to EC and INTOSC Oscillator modes.
GIE = 1 assumed. In this case after wake-up, the processor calls the ISR at 0004h. If GIE = 0, execution will continue in-line.
DS40001722C-page 86
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PIC16(L)F1703/7
8.2
Low-Power Sleep Mode
The PIC16F1703/7 device contains an internal Low
Dropout (LDO) voltage regulator, which allows the
device I/O pins to operate at voltages up to 5.5V while
the internal device logic operates at a lower voltage.
The LDO and its associated reference circuitry must
remain active when the device is in Sleep mode. The
PIC16F1703/7 allows the user to optimize the
operating current in Sleep, depending on the
application requirements.
A Low-Power Sleep mode can be selected by setting
the VREGPM bit of the VREGCON register. With this
bit set, the LDO and reference circuitry are placed in a
low-power state when the device is in Sleep.
8.2.1
SLEEP CURRENT VS. WAKE-UP
TIME
In the default operating mode, the LDO and reference
circuitry remain in the normal configuration while in
Sleep. The device is able to exit Sleep mode quickly
since all circuits remain active. In Low-Power Sleep
mode, when waking up from Sleep, an extra delay time
is required for these circuits to return to the normal
configuration and stabilize.
8.2.2
PERIPHERAL USAGE IN SLEEP
Some peripherals that can operate in Sleep mode will
not operate properly with the Low-Power Sleep mode
selected. The Low-Power Sleep mode is intended for
use only with the following peripherals:
•
•
•
•
Brown-Out Reset (BOR)
Watchdog Timer (WDT)
External interrupt pin/Interrupt-on-change pins
Timer1 (with external clock source < 100 kHz)
Note:
The PIC16LF1703/7 does not have a
configurable Low-Power Sleep mode.
PIC16LF1703/7 is an unregulated device
and is always in the lowest power state
when in Sleep, with no wake-up time
penalty. This device has a lower maximum
VDD and I/O voltage than the
PIC16F1703/7.
See
Section 26.0
“Electrical Specifications” for more
information.
The Low-Power Sleep mode is beneficial for applications that stay in Sleep mode for long periods of time.
The normal mode is beneficial for applications that
need to wake from Sleep quickly and frequently.
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PIC16(L)F1703/7
8.3
Register Definitions: Voltage Regulator Control
VREGCON: VOLTAGE REGULATOR CONTROL REGISTER(1)
REGISTER 8-1:
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0/0
R/W-1/1
—
—
—
—
—
—
VREGPM
Reserved
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-2
Unimplemented: Read as ‘0’
bit 1
VREGPM: Voltage Regulator Power Mode Selection bit
1 = Low-Power Sleep mode enabled in Sleep(2)
Draws lowest current in Sleep, slower wake-up
0 = Normal-Power mode enabled in Sleep(2)
Draws higher current in Sleep, faster wake-up
bit 0
Reserved: Read as ‘1’. Maintain this bit set.
Note 1:
2:
PIC16F1703/7 only.
See Section 26.0 “Electrical Specifications”.
TABLE 8-1:
SUMMARY OF REGISTERS ASSOCIATED WITH POWER-DOWN MODE
Name
Bit 7
Bit 6
INTCON
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register on
Page
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
IOCAP
—
—
IOCAP5
IOCAP4
IOCAP3
IOCAP2
IOCAP1
IOCAP0
137
IOCAN
—
—
IOCAN5
IOCAN4
IOCAN3
IOCAN2
IOCAN1
IOCAN0
137
—
—
IOCAF5
IOCAF4
IOCAF3
IOCAF2
IOCAF1
IOCAF0
137
IOCBP(1)
IOCBP7
IOCBP6
IOCBP5
IOCBP4
—
—
—
—
138
IOCBN(1)
IOCBN7
IOCBN6
IOCBN5
IOCBN4
—
—
—
—
138
IOCAF
(1)
IOCBF
IOCBF7
IOCBF6
IOCBF5
IOCBF4
—
—
—
—
138
IOCCP
IOCCP7(1)
IOCCP6(1)
IOCCP5
IOCCP4
IOCCP3
IOCCP2
IOCCP1
IOCCP0
139
IOCCN
IOCCN7(1)
IOCCN6(1)
IOCCN5
IOCCN4
IOCCN3
IOCCN2
IOCCN1
IOCCN0
139
IOCCF
IOCCF7(1)
IOCCF6(1)
IOCCF5
IOCCF4
IOCCF3
IOCCF2
IOCCF1
IOCCF0
139
PIE1
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
PIE2
—
—
—
—
BCL1IE
—
—
CCP2IE
79
PIE3
—
—
—
ZCDIE
—
—
—
—
80
PIR1
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
81
PIR2
—
—
—
—
BCL1IF
—
—
CCP2IF
82
PIR3
—
—
—
ZCDIF
—
—
—
—
83
STATUS
—
—
—
TO
PD
Z
DC
C
21
VREGCON(2)
—
—
—
—
—
—
VREGPM
Reserved
88
WDTCON
—
—
SWDTEN
92
Legend:
Note 1:
2:
WDTPS<4:0>
— = unimplemented location, read as ‘0’. Shaded cells are not used in Power-Down mode.
PIC16(L)F1707 only.
PIC16F1703/7 only.
DS40001722C-page 88
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PIC16(L)F1703/7
9.0
WATCHDOG TIMER (WDT)
The Watchdog Timer is a system timer that generates
a Reset if the firmware does not issue a CLRWDT
instruction within the time-out period. The Watchdog
Timer is typically used to recover the system from
unexpected events.
The WDT has the following features:
• Independent clock source
• Multiple operating modes
- WDT is always on
- WDT is off when in Sleep
- WDT is controlled by software
- WDT is always off
• Configurable time-out period is from 1 ms to 256
seconds (nominal)
• Multiple Reset conditions
• Operation during Sleep
FIGURE 9-1:
WATCHDOG TIMER BLOCK DIAGRAM
WDTE<1:0> = 01
SWDTEN
WDTE<1:0> = 11
LFINTOSC
23-bit Programmable
Prescaler WDT
WDT Time-out
WDTE<1:0> = 10
Sleep
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WDTPS<4:0>
DS40001722C-page 89
PIC16(L)F1703/7
9.1
Independent Clock Source
9.4
The WDT derives its time base from the 31 kHz
LFINTOSC internal oscillator. Time intervals in this
chapter are based on a nominal interval of 1 ms. See
Table 26-8 for the LFINTOSC specification.
9.2
WDT Operating Modes
The Watchdog Timer module has four operating modes
controlled by the WDTE<1:0> bits in Configuration
Words. See Table 9-1.
9.2.1
WDT IS ALWAYS ON
WDT protection is active during Sleep.
WDT IS OFF IN SLEEP
WDT protection is not active during Sleep.
WDT CONTROLLED BY SOFTWARE
When the WDTE bits of Configuration Words are set to
‘01’, the WDT is controlled by the SWDTEN bit of the
WDTCON register.
WDT protection is unchanged by Sleep. See Table 9-1
for more details.
TABLE 9-1:
•
•
•
•
•
•
•
Any Reset
CLRWDT instruction is executed
Device enters Sleep
Device wakes up from Sleep
Oscillator fail
WDT is disabled
Oscillator Start-up Timer (OST) is running
9.5
Operation During Sleep
When the device enters Sleep, the WDT is cleared. If
the WDT is enabled during Sleep, the WDT resumes
counting.
When the WDTE bits of Configuration Words are set to
‘10’, the WDT is on, except in Sleep.
9.2.3
The WDT is cleared when any of the following
conditions occur:
See Table 9-2 for more information.
When the WDTE bits of Configuration Words are set to
‘11’, the WDT is always on.
9.2.2
Clearing the WDT
When the device exits Sleep, the WDT is cleared
again. The WDT remains clear until the OST, if
enabled, completes. See Section 6.0 “Oscillator
Module (with Fail-Safe Clock Monitor)” for more
information on the OST.
When a WDT time-out occurs while the device is in
Sleep, no Reset is generated. Instead, the device
wakes up and resumes operation. The TO and PD bits
in the STATUS register are changed to indicate the
event. See STATUS Register (Register 3-1) for more
information.
WDT OPERATING MODES
WDTE<1:0>
SWDTEN
Device
Mode
11
X
X
10
X
WDT
Mode
Active
Awake Active
1
01
Sleep
X
0
00
9.3
X
X
Disabled
Active
Disabled
Disabled
Time-Out Period
The WDTPS bits of the WDTCON register set the
time-out period from 1 ms to 256 seconds (nominal).
After a Reset, the default time-out period is two
seconds.
DS40001722C-page 90
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PIC16(L)F1703/7
TABLE 9-2:
WDT CLEARING CONDITIONS
Conditions
WDT
WDTE<1:0> = 00
WDTE<1:0> = 01 and SWDTEN = 0
WDTE<1:0> = 10 and enter Sleep
CLRWDT Command
Cleared
Oscillator Fail Detected
Exit Sleep + System Clock = T1OSC, EXTRC, INTOSC, EXTCLK
Change INTOSC divider (IRCF bits)
 2013-2015 Microchip Technology Inc.
Unaffected
DS40001722C-page 91
PIC16(L)F1703/7
9.6
Register Definitions: Watchdog Control
REGISTER 9-1:
U-0
WDTCON: WATCHDOG TIMER CONTROL REGISTER
U-0
—
R/W-0/0
R/W-1/1
R/W-0/0
R/W-1/1
R/W-1/1
(1)
—
WDTPS<4:0>
R/W-0/0
SWDTEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-m/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-1
WDTPS<4:0>: Watchdog Timer Period Select bits(1)
Bit Value = Prescale Rate
11111 = Reserved. Results in minimum interval (1:32)
•
•
•
10011 = Reserved. Results in minimum interval (1:32)
10010
10001
10000
01111
01110
01101
01100
01011
01010
01001
01000
00111
00110
00101
00100
00011
00010
00001
00000
bit 0
Note 1:
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
1:8388608 (223) (Interval 256s nominal)
1:4194304 (222) (Interval 128s nominal)
1:2097152 (221) (Interval 64s nominal)
1:1048576 (220) (Interval 32s nominal)
1:524288 (219) (Interval 16s nominal)
1:262144 (218) (Interval 8s nominal)
1:131072 (217) (Interval 4s nominal)
1:65536 (Interval 2s nominal) (Reset value)
1:32768 (Interval 1s nominal)
1:16384 (Interval 512 ms nominal)
1:8192 (Interval 256 ms nominal)
1:4096 (Interval 128 ms nominal)
1:2048 (Interval 64 ms nominal)
1:1024 (Interval 32 ms nominal)
1:512 (Interval 16 ms nominal)
1:256 (Interval 8 ms nominal)
1:128 (Interval 4 ms nominal)
1:64 (Interval 2 ms nominal)
1:32 (Interval 1 ms nominal)
SWDTEN: Software Enable/Disable for Watchdog Timer bit
If WDTE<1:0> = 1x:
This bit is ignored.
If WDTE<1:0> = 01:
1 = WDT is turned on
0 = WDT is turned off
If WDTE<1:0> = 00:
This bit is ignored.
Times are approximate. WDT time is based on 31 kHz LFINTOSC.
DS40001722C-page 92
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 9-3:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH WATCHDOG TIMER
Bit 7
Bit 6
OSCCON
SPLLEN
STATUS
—
—
WDTCON
—
—
Bit 5
Bit 4
Bit 3
IRCF<3:0>
—
Bit 2
—
TO
PD
Bit 1
Bit 0
SCS<1:0>
Z
DC
WDTPS<4:0>
Register
on Page
69
C
21
SWDTEN
92
Legend: x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by
Watchdog Timer.
TABLE 9-4:
Name
CONFIG1
CONFIG2
Bits
SUMMARY OF CONFIGURATION BITS ASSOCIATED WITH WATCHDOG TIMER
Bit -/7
Bit -/6
Bit 13/5
Bit 12/4
Bit 11/3
—
CLKOUTEN
13:8
—
—
—
7:0
CP
MCLRE
PWRTE
13:8
—
—
LVP
DEBUG
7:0
ZCDDIS
—
—
—
WDTE<1:0>
Bit 10/2
Bit 9/1
Bit 8/0
BOREN<1:0>
—
—
FOSC<1:0>
LPBOR
BORV
STVREN PLLEN
—
PPS1WAY
WRT<1:0>
Register
on Page
49
50
Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used by Watchdog Timer.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 93
PIC16(L)F1703/7
10.0
FLASH PROGRAM MEMORY
CONTROL
The Flash program memory is readable and writable
during normal operation over the full VDD range.
Program memory is indirectly addressed using Special
Function Registers (SFRs). The SFRs used to access
program memory are:
•
•
•
•
•
•
PMCON1
PMCON2
PMDATL
PMDATH
PMADRL
PMADRH
When accessing the program memory, the
PMDATH:PMDATL register pair forms a 2-byte word
that holds the 14-bit data for read/write, and the
PMADRH:PMADRL register pair forms a 2-byte word
that holds the 15-bit address of the program memory
location being read.
The write time is controlled by an on-chip timer. The
write/erase voltages are generated by an on-chip charge
pump rated to operate over the operating voltage range
of the device.
The Flash program memory can be protected in two
ways; by code protection (CP bit in Configuration Words)
and write protection (WRT<1:0> bits in Configuration
Words).
Code protection (CP = 0)(1), disables access, reading
and writing, to the Flash program memory via external
device programmers. Code protection does not affect
the self-write and erase functionality. Code protection
can only be reset by a device programmer performing
a Bulk Erase to the device, clearing all Flash program
memory, Configuration bits and User IDs.
Write protection prohibits self-write and erase to a
portion or all of the Flash program memory as defined
by the bits WRT<1:0>. Write protection does not affect
a device programmers ability to read, write or erase the
device.
Note 1: Code protection of the entire Flash
program memory array is enabled by
clearing the CP bit of Configuration Words.
10.1
PMADRL and PMADRH Registers
The PMADRH:PMADRL register pair can address up
to a maximum of 32K words of program memory. When
selecting a program address value, the MSB of the
address is written to the PMADRH register and the LSB
is written to the PMADRL register.
DS40001722C-page 94
10.1.1
PMCON1 AND PMCON2
REGISTERS
PMCON1 is the control register for Flash program
memory accesses.
Control bits RD and WR initiate read and write,
respectively. These bits cannot be cleared, only set, in
software. They are cleared by hardware at completion
of the read or write operation. The inability to clear the
WR bit in software prevents the accidental, premature
termination of a write operation.
The WREN bit, when set, will allow a write operation to
occur. On power-up, the WREN bit is clear. The
WRERR bit is set when a write operation is interrupted
by a Reset during normal operation. In these situations,
following Reset, the user can check the WRERR bit
and execute the appropriate error handling routine.
The PMCON2 register is a write-only register. Attempting
to read the PMCON2 register will return all ‘0’s.
To enable writes to the program memory, a specific
pattern (the unlock sequence), must be written to the
PMCON2 register. The required unlock sequence
prevents inadvertent writes to the program memory
write latches and Flash program memory.
10.2
Flash Program Memory Overview
It is important to understand the Flash program memory
structure for erase and programming operations. Flash
program memory is arranged in rows. A row consists of
a fixed number of 14-bit program memory words. A row
is the minimum size that can be erased by user software.
After a row has been erased, the user can reprogram
all or a portion of this row. Data to be written into the
program memory row is written to 14-bit wide data write
latches. These write latches are not directly accessible
to the user, but may be loaded via sequential writes to
the PMDATH:PMDATL register pair.
Note:
If the user wants to modify only a portion
of a previously programmed row, then the
contents of the entire row must be read
and saved in RAM prior to the erase.
Then, new data and retained data can be
written into the write latches to reprogram
the row of Flash program memory. However, any unprogrammed locations can be
written without first erasing the row. In this
case, it is not necessary to save and
rewrite the other previously programmed
locations.
See Table 10-1 for Erase Row size and the number of
write latches for Flash program memory.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 10-1:
Device
PIC16(L)F1703
PIC16(L)F1707
10.2.1
FLASH MEMORY
ORGANIZATION BY DEVICE
Row Erase
(words)
Write
Latches
(words)
16
16
READING THE FLASH PROGRAM
MEMORY
To read a program memory location, the user must:
1.
2.
3.
Write
the
desired
address
to
the
PMADRH:PMADRL register pair.
Clear the CFGS bit of the PMCON1 register.
Then, set control bit RD of the PMCON1 register.
Once the read control bit is set, the program memory
Flash controller will use the second instruction cycle to
read the data. This causes the second instruction
immediately following the “BSF PMCON1,RD” instruction
to be ignored. The data is available in the very next cycle,
in the PMDATH:PMDATL register pair; therefore, it can
be read as two bytes in the following instructions.
PMDATH:PMDATL register pair will hold this value until
another read or until it is written to by the user.
Note:
The two instructions following a program
memory read are required to be NOPs.
This prevents the user from executing a
2-cycle instruction on the next instruction
after the RD bit is set.
FIGURE 10-1:
FLASH PROGRAM
MEMORY READ
FLOWCHART
Start
Read Operation
Select
Program or Configuration Memory
(CFGS)
Select
Word Address
(PMADRH:PMADRL)
Initiate Read operation
(RD = 1)
Instruction Fetched ignored
NOP execution forced
Instruction Fetched ignored
NOP execution forced
Data read now in
PMDATH:PMDATL
End
Read Operation
 2013-2015 Microchip Technology Inc.
DS40001722C-page 95
PIC16(L)F1703/7
FIGURE 10-2:
FLASH PROGRAM MEMORY READ CYCLE EXECUTION
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
PC
Flash ADDR
Flash Data
PC + 1
INSTR (PC)
INSTR(PC - 1)
executed here
PC
+3
PC+3
PMADRH,PMADRL
INSTR (PC + 1)
BSF PMCON1,RD
executed here
PMDATH,PMDATL
INSTR(PC + 1)
instruction ignored
Forced NOP
executed here
PC + 4
INSTR (PC + 3)
INSTR(PC + 2)
instruction ignored
Forced NOP
executed here
PC + 5
INSTR (PC + 4)
INSTR(PC + 3)
executed here
INSTR(PC + 4)
executed here
RD bit
PMDATH
PMDATL
Register
EXAMPLE 10-1:
FLASH PROGRAM MEMORY READ
* This code block will read 1 word of program
* memory at the memory address:
PROG_ADDR_HI : PROG_ADDR_LO
*
data will be returned in the variables;
*
PROG_DATA_HI, PROG_DATA_LO
BANKSEL
MOVLW
MOVWF
MOVLW
MOVWF
PMADRL
PROG_ADDR_LO
PMADRL
PROG_ADDR_HI
PMADRH
; Select Bank for PMCON registers
;
; Store LSB of address
;
; Store MSB of address
BCF
BSF
NOP
NOP
PMCON1,CFGS
PMCON1,RD
;
;
;
;
Do not select Configuration Space
Initiate read
Ignored (Figure 10-1)
Ignored (Figure 10-1)
MOVF
MOVWF
MOVF
MOVWF
PMDATL,W
PROG_DATA_LO
PMDATH,W
PROG_DATA_HI
;
;
;
;
Get LSB of word
Store in user location
Get MSB of word
Store in user location
DS40001722C-page 96
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
10.2.2
FLASH MEMORY UNLOCK
SEQUENCE
The unlock sequence is a mechanism that protects the
Flash program memory from unintended self-write programming or erasing. The sequence must be executed
and completed without interruption to successfully
complete any of the following operations:
• Row Erase
• Load program memory write latches
• Write of program memory write latches to
program memory
• Write of program memory write latches to User
IDs
The unlock sequence consists of the following steps:
FIGURE 10-3:
FLASH PROGRAM
MEMORY UNLOCK
SEQUENCE FLOWCHART
Start
Unlock Sequence
Write 055h to
PMCON2
Write 0AAh to
PMCON2
1. Write 55h to PMCON2
2. Write AAh to PMCON2
3. Set the WR bit in PMCON1
Initiate
Write or Erase operation
(WR = 1)
4. NOP instruction
5. NOP instruction
Once the WR bit is set, the processor will always force
two NOP instructions. When an Erase Row or Program
Row operation is being performed, the processor will stall
internal operations (typical 2 ms), until the operation is
complete and then resume with the next instruction.
When the operation is loading the program memory write
latches, the processor will always force the two NOP
instructions and continue uninterrupted with the next
instruction.
Instruction Fetched ignored
NOP execution forced
Instruction Fetched ignored
NOP execution forced
End
Unlock Sequence
Since the unlock sequence must not be interrupted,
global interrupts should be disabled prior to the unlock
sequence and re-enabled after the unlock sequence is
completed.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 97
PIC16(L)F1703/7
10.2.3
ERASING FLASH PROGRAM
MEMORY
While executing code, program memory can only be
erased by rows. To erase a row:
1.
2.
3.
4.
5.
Load the PMADRH:PMADRL register pair with
any address within the row to be erased.
Clear the CFGS bit of the PMCON1 register.
Set the FREE and WREN bits of the PMCON1
register.
Write 55h, then AAh, to PMCON2 (Flash
programming unlock sequence).
Set control bit WR of the PMCON1 register to
begin the erase operation.
See Example 10-2.
After the “BSF PMCON1,WR” instruction, the processor
requires two cycles to set up the erase operation. The
user must place two NOP instructions immediately following the WR bit set instruction. The processor will
halt internal operations for the typical 2 ms erase time.
This is not Sleep mode as the clocks and peripherals
will continue to run. After the erase cycle, the processor
will resume operation with the third instruction after the
PMCON1 write instruction.
FIGURE 10-4:
FLASH PROGRAM
MEMORY ERASE
FLOWCHART
Start
Erase Operation
Disable Interrupts
(GIE = 0)
Select
Program or Configuration Memory
(CFGS)
Select Row Address
(PMADRH:PMADRL)
Select Erase Operation
(FREE = 1)
Enable Write/Erase Operation
(WREN = 1)
Unlock Sequence
Figure 10-3
(FIGURE
x-x)
CPU stalls while
Erase operation completes
(2ms typical)
Disable Write/Erase Operation
(WREN = 0)
Re-enable Interrupts
(GIE = 1)
End
Erase Operation
DS40001722C-page 98
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
EXAMPLE 10-2:
ERASING ONE ROW OF PROGRAM MEMORY
Required
Sequence
; This row erase routine assumes the following:
; 1. A valid address within the erase row is loaded in ADDRH:ADDRL
; 2. ADDRH and ADDRL are located in shared data memory 0x70 - 0x7F (common RAM)
BCF
BANKSEL
MOVF
MOVWF
MOVF
MOVWF
BCF
BSF
BSF
INTCON,GIE
PMADRL
ADDRL,W
PMADRL
ADDRH,W
PMADRH
PMCON1,CFGS
PMCON1,FREE
PMCON1,WREN
MOVLW
MOVWF
MOVLW
MOVWF
BSF
NOP
NOP
55h
PMCON2
0AAh
PMCON2
PMCON1,WR
BCF
BSF
PMCON1,WREN
INTCON,GIE
 2013-2015 Microchip Technology Inc.
; Disable ints so required sequences will execute properly
; Load lower 8 bits of erase address boundary
; Load upper 6 bits of erase address boundary
; Not configuration space
; Specify an erase operation
; Enable writes
;
;
;
;
;
;
;
;
;
;
Start of required sequence to initiate erase
Write 55h
Write AAh
Set WR bit to begin erase
NOP instructions are forced as processor starts
row erase of program memory.
The processor stalls until the erase process is complete
after erase processor continues with 3rd instruction
; Disable writes
; Enable interrupts
DS40001722C-page 99
PIC16(L)F1703/7
10.2.4
WRITING TO FLASH PROGRAM
MEMORY
Program memory is programmed using the following
steps:
1.
2.
3.
4.
Load the address in PMADRH:PMADRL of the
row to be programmed.
Load each write latch with data.
Initiate a programming operation.
Repeat steps 1 through 3 until all data is written.
The following steps should be completed to load the
write latches and program a row of program memory.
These steps are divided into two parts. First, each write
latch is loaded with data from the PMDATH:PMDATL
using the unlock sequence with LWLO = 1. When the
last word to be loaded into the write latch is ready, the
LWLO bit is cleared and the unlock sequence
executed. This initiates the programming operation,
writing all the latches into Flash program memory.
Note:
Before writing to program memory, the word(s) to be
written must be erased or previously unwritten.
Program memory can only be erased one row at a time.
No automatic erase occurs upon the initiation of the
write.
Program memory can be written one or more words at
a time. The maximum number of words written at one
time is equal to the number of write latches. See
Figure 10-5 (row writes to program memory with 16
write latches) for more details.
The write latches are aligned to the Flash row address
boundary defined by the upper 10-bits of
PMADRH:PMADRL, (PMADRH<6:0>:PMADRL<7:5>)
with the lower five bits of PMADRL, (PMADRL<4:0>)
determining the write latch being loaded. Write operations do not cross these boundaries. At the completion
of a program memory write operation, the data in the
write latches is reset to contain 0x3FFF.
The special unlock sequence is required
to load a write latch with data or initiate a
Flash programming operation. If the
unlock sequence is interrupted, writing to
the latches or program memory will not be
initiated.
1.
2.
3.
Set the WREN bit of the PMCON1 register.
Clear the CFGS bit of the PMCON1 register.
Set the LWLO bit of the PMCON1 register.
When the LWLO bit of the PMCON1 register is
‘1’, the write sequence will only load the write
latches and will not initiate the write to Flash
program memory.
4. Load the PMADRH:PMADRL register pair with
the address of the location to be written.
5. Load the PMDATH:PMDATL register pair with
the program memory data to be written.
6. Execute the unlock sequence (Section 10.2.2
“Flash Memory Unlock Sequence”). The write
latch is now loaded.
7. Increment the PMADRH:PMADRL register pair
to point to the next location.
8. Repeat steps 5 through 7 until all but the last
write latch has been loaded.
9. Clear the LWLO bit of the PMCON1 register.
When the LWLO bit of the PMCON1 register is
‘0’, the write sequence will initiate the write to
Flash program memory.
10. Load the PMDATH:PMDATL register pair with
the program memory data to be written.
11. Execute the unlock sequence (Section 10.2.2
“Flash Memory Unlock Sequence”). The
entire program memory latch content is now
written to Flash program memory.
Note:
The program memory write latches are
reset to the blank state (0x3FFF) at the
completion of every write or erase
operation. As a result, it is not necessary
to load all the program memory write
latches. Unloaded latches will remain in
the blank state.
An example of the complete write sequence is shown in
Example 10-3. The initial address is loaded into the
PMADRH:PMADRL register pair; the data is loaded
using indirect addressing.
DS40001722C-page 100
 2013-2015 Microchip Technology Inc.
7
BLOCK WRITES TO FLASH PROGRAM MEMORY WITH 16 WRITE LATCHES
6
0 7
5 4
PMADRH
-
r9
r8
r7
r6
r5
0
7
PMADRL
r4
r3
r2
r1
r0
c4
c3
c2
c1
-
5
-
0
7
PMDATH
PMDATL
6
c0
Rev. 10-000004A_A0
0
8
14
Program Memory Write Latches
5
10
14
PMADRL<4:0>
Write Latch #0
00h
14
CFGS = 0
 2013-2015 Microchip Technology Inc.
PMADRH<6:0>:
PMADRL<7:5>
Row
Address
Decode
14
14
Write Latch #1
01h
14
Write Latch #30
1Eh
14
Write Latch #31
1Fh
14
14
Row
Addr
Addr
Addr
Addr
000h
0000h
0001h
001Eh
001Fh
001h
0020h
0021h
003Eh
003Fh
002h
0040h
0041h
005Eh
005Fh
3FEh
7FC0h
7FC1h
7FDEh
7FDFh
3FFh
7FE0h
7FE1h
7FFEh
7FFFh
Flash Program Memory
400h
CFGS = 1
8000h - 8003h
8004h – 8005h
8006h
8007h – 8008h
8009h - 801Fh
USER ID 0 - 3
reserved
DEVICE ID
Dev / Rev
Configuration
Words
reserved
Configuration Memory
PIC16(L)F1703/7
DS40001722C-page 101
FIGURE 10-5:
PIC16(L)F1703/7
FIGURE 10-6:
FLASH PROGRAM MEMORY WRITE FLOWCHART
Start
Write Operation
Determine number of words
to be written into Program or
Configuration Memory.
The number of words cannot
exceed the number of words
per row.
(word_cnt)
Disable Interrupts
(GIE = 0)
Select
Program or Config. Memory
(CFGS)
Select Row Address
(PMADRH:PMADRL)
Enable Write/Erase
Operation (WREN = 1)
Load the value to write
(PMDATH:PMDATL)
Update the word counter
(word_cnt--)
Last word to
write ?
Yes
No
Unlock Sequence
(Figure10-3
x-x)
Figure
Select Write Operation
(FREE = 0)
No delay when writing to
Program Memory Latches
Load Write Latches Only
(LWLO = 1)
Increment Address
(PMADRH:PMADRL++)
Write Latches to Flash
(LWLO = 0)
Unlock Sequence
(Figure10-3
x-x)
Figure
CPU stalls while Write
operation completes
(2ms typical)
Disable
Write/Erase Operation
(WREN = 0)
Re-enable Interrupts
(GIE = 1)
End
Write Operation
DS40001722C-page 102
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
EXAMPLE 10-3:
;
;
;
;
;
;
;
WRITING TO FLASH PROGRAM MEMORY
This write routine assumes the following:
1. 64 bytes of data are loaded, starting at the address in DATA_ADDR
2. Each word of data to be written is made up of two adjacent bytes in DATA_ADDR,
stored in little endian format
3. A valid starting address (the least significant bits = 00000) is loaded in ADDRH:ADDRL
4. ADDRH and ADDRL are located in shared data memory 0x70 - 0x7F (common RAM)
BCF
BANKSEL
MOVF
MOVWF
MOVF
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
BCF
BSF
BSF
INTCON,GIE
PMADRH
ADDRH,W
PMADRH
ADDRL,W
PMADRL
LOW DATA_ADDR
FSR0L
HIGH DATA_ADDR
FSR0H
PMCON1,CFGS
PMCON1,WREN
PMCON1,LWLO
;
;
;
;
;
;
;
;
;
;
;
;
;
Disable ints so required sequences will execute properly
Bank 3
Load initial address
MOVIW
MOVWF
MOVIW
MOVWF
FSR0++
PMDATL
FSR0++
PMDATH
; Load first data byte into lower
;
; Load second data byte into upper
;
MOVF
XORLW
ANDLW
BTFSC
GOTO
PMADRL,W
0x1F
0x1F
STATUS,Z
START_WRITE
; Check if lower bits of address are '00000'
; Check if we're on the last of 32 addresses
;
; Exit if last of 32 words,
;
MOVLW
MOVWF
MOVLW
MOVWF
BSF
NOP
55h
PMCON2
0AAh
PMCON2
PMCON1,WR
;
;
;
;
;
;
;
;
PMADRL,F
LOOP
; Still loading latches Increment address
; Write next latches
PMCON1,LWLO
; No more loading latches - Actually start Flash program
; memory write
55h
PMCON2
0AAh
PMCON2
PMCON1,WR
;
;
;
;
;
;
;
;
;
;
;
;
;
Load initial data address
Load initial data address
Not configuration space
Enable writes
Only Load Write Latches
Required
Sequence
LOOP
NOP
INCF
GOTO
Required
Sequence
START_WRITE
BCF
MOVLW
MOVWF
MOVLW
MOVWF
BSF
NOP
NOP
BCF
BSF
PMCON1,WREN
INTCON,GIE
 2013-2015 Microchip Technology Inc.
Start of required write sequence:
Write 55h
Write AAh
Set WR bit to begin write
NOP instructions are forced as processor
loads program memory write latches
Start of required write sequence:
Write 55h
Write AAh
Set WR bit to begin write
NOP instructions are forced as processor writes
all the program memory write latches simultaneously
to program memory.
After NOPs, the processor
stalls until the self-write process in complete
after write processor continues with 3rd instruction
Disable writes
Enable interrupts
DS40001722C-page 103
PIC16(L)F1703/7
10.3
Modifying Flash Program Memory
When modifying existing data in a program memory
row, and data within that row must be preserved, it must
first be read and saved in a RAM image. Program
memory is modified using the following steps:
1.
2.
3.
4.
5.
6.
7.
Load the starting address of the row to be
modified.
Read the existing data from the row into a RAM
image.
Modify the RAM image to contain the new data
to be written into program memory.
Load the starting address of the row to be
rewritten.
Erase the program memory row.
Load the write latches with data from the RAM
image.
Initiate a programming operation.
FIGURE 10-7:
FLASH PROGRAM
MEMORY MODIFY
FLOWCHART
Start
Modify Operation
Read Operation
(Figure10-1
x.x)
Figure
An image of the entire row read
must be stored in RAM
Modify Image
The words to be modified are
changed in the RAM image
Erase Operation
(Figure10-4
x.x)
Figure
Write Operation
use RAM image
(Figure10-6
x.x)
Figure
End
Modify Operation
DS40001722C-page 104
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10.4
User ID, Device ID and
Configuration Word Access
Instead of accessing program memory, the User ID’s,
Device ID/Revision ID and Configuration Words can be
accessed when CFGS = 1 in the PMCON1 register.
This is the region that would be pointed to by
PC<15> = 1, but not all addresses are accessible.
Different access may exist for reads and writes. Refer
to Table 10-2.
When read access is initiated on an address outside
the
parameters
listed
in
Table 10-2,
the
PMDATH:PMDATL register pair is cleared, reading
back ‘0’s.
TABLE 10-2:
USER ID, DEVICE ID AND CONFIGURATION WORD ACCESS (CFGS = 1)
Address
Function
Read Access
Write Access
8000h-8003h
8005h-8006h
8007h-8008h
User IDs
Device ID/Revision ID
Configuration Words 1 and 2
Yes
Yes
Yes
Yes
No
No
EXAMPLE 10-4:
CONFIGURATION WORD AND DEVICE ID ACCESS
* This code block will read 1 word of program memory at the memory address:
*
PROG_ADDR_LO (must be 00h-08h) data will be returned in the variables;
*
PROG_DATA_HI, PROG_DATA_LO
BANKSEL
MOVLW
MOVWF
CLRF
PMADRL
PROG_ADDR_LO
PMADRL
PMADRH
; Select correct Bank
;
; Store LSB of address
; Clear MSB of address
BSF
BCF
BSF
NOP
NOP
BSF
PMCON1,CFGS
INTCON,GIE
PMCON1,RD
INTCON,GIE
;
;
;
;
;
;
Select Configuration Space
Disable interrupts
Initiate read
Executed (See Figure 10-2)
Ignored (See Figure 10-2)
Restore interrupts
MOVF
MOVWF
MOVF
MOVWF
PMDATL,W
PROG_DATA_LO
PMDATH,W
PROG_DATA_HI
;
;
;
;
Get LSB of word
Store in user location
Get MSB of word
Store in user location
 2013-2015 Microchip Technology Inc.
DS40001722C-page 105
PIC16(L)F1703/7
10.5
Write Verify
It is considered good programming practice to verify that
program memory writes agree with the intended value.
Since program memory is stored as a full page then the
stored program memory contents are compared with the
intended data stored in RAM after the last write is
complete.
FIGURE 10-8:
FLASH PROGRAM
MEMORY VERIFY
FLOWCHART
Start
Verify Operation
This routine assumes that the last row
of data written was from an image
saved in RAM. This image will be used
to verify the data currently stored in
Flash Program Memory.
Read Operation
(Figure
x.x)
Figure
10-1
PMDAT =
RAM image
?
Yes
No
No
Fail
Verify Operation
Last
Word ?
Yes
End
Verify Operation
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PIC16(L)F1703/7
10.6
Register Definitions: Flash Program Memory Control
REGISTER 10-1:
R/W-x/u
PMDATL: PROGRAM MEMORY DATA LOW BYTE REGISTER
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
PMDATL<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
PMDATL<7:0>: Read/write value for Least Significant bits of program memory
REGISTER 10-2:
PMDATH: PROGRAM MEMORY DATA HIGH BYTE REGISTER
U-0
U-0
—
—
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
PMDATH<13:8>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
PMDATH<13:8>: Read/write value for Most Significant bits of program memory
REGISTER 10-3:
R/W-0/0
PMADRL: PROGRAM MEMORY ADDRESS LOW BYTE REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
PMADRL<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
PMADRL<7:0>: Specifies the Least Significant bits for program memory address
REGISTER 10-4:
U-1
PMADRH: PROGRAM MEMORY ADDRESS HIGH BYTE REGISTER
R/W-0/0
R/W-0/0
—(1)
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
PMADRH<14:8>
bit 0
bit 7
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
Unimplemented: Read as ‘1’
bit 6-0
PMADRH<14:8>: Specifies the Most Significant bits for program memory address
Note
1:
Unimplemented, read as ‘1’.
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REGISTER 10-5:
PMCON1: PROGRAM MEMORY CONTROL 1 REGISTER
U-1
R/W-0/0
R/W-0/0
R/W/HC-0/0
R/W/HC-x/q(2)
R/W-0/0
R/S/HC-0/0
R/S/HC-0/0
—(1)
CFGS
LWLO(3)
FREE
WRERR
WREN
WR
RD
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
S = Bit can only be set
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
HC = Bit is cleared by hardware
bit 7
Unimplemented: Read as ‘1’
bit 6
CFGS: Configuration Select bit
1 = Access Configuration, User ID and Device ID Registers
0 = Access Flash program memory
bit 5
LWLO: Load Write Latches Only bit(3)
1 = Only the addressed program memory write latch is loaded/updated on the next WR command
0 = The addressed program memory write latch is loaded/updated and a write of all program memory write latches
will be initiated on the next WR command
bit 4
FREE: Program Flash Erase Enable bit
1 = Performs an erase operation on the next WR command (hardware cleared upon completion)
0 = Performs a write operation on the next WR command
bit 3
WRERR: Program/Erase Error Flag bit
1 = Condition indicates an improper program or erase sequence attempt or termination (bit is set automatically
on any set attempt (write ‘1’) of the WR bit).
0 = The program or erase operation completed normally
bit 2
WREN: Program/Erase Enable bit
1 = Allows program/erase cycles
0 = Inhibits programming/erasing of program Flash
bit 1
WR: Write Control bit
1 = Initiates a program Flash program/erase operation.
The operation is self-timed and the bit is cleared by hardware once operation is complete.
The WR bit can only be set (not cleared) in software.
0 = Program/erase operation to the Flash is complete and inactive
bit 0
RD: Read Control bit
1 = Initiates a program Flash read. Read takes one cycle. RD is cleared in hardware. The RD bit can only be set
(not cleared) in software.
0 = Does not initiate a program Flash read
Note 1:
2:
3:
Unimplemented bit, read as ‘1’.
The WRERR bit is automatically set by hardware when a program memory write or erase operation is started (WR = 1).
The LWLO bit is ignored during a program memory erase operation (FREE = 1).
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REGISTER 10-6:
W-0/0
PMCON2: PROGRAM MEMORY CONTROL 2 REGISTER
W-0/0
W-0/0
W-0/0
W-0/0
W-0/0
W-0/0
W-0/0
PMCON2<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
S = Bit can only be set
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
Flash Memory Unlock Pattern bits
To unlock writes, a 55h must be written first, followed by an AAh, before setting the WR bit of the
PMCON1 register. The value written to this register is used to unlock the writes. There are specific
timing requirements on these writes.
TABLE 10-3:
SUMMARY OF REGISTERS ASSOCIATED WITH FLASH PROGRAM MEMORY
Register on
Page
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
INTCON
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
CFGS
LWLO
FREE
WRERR
WREN
WR
RD
108
PMCON1
(1)
—
PMCON2
PMCON2<7:0>
109
PMADRL
PMADR
107
(1)
—
PMADRH
PMADR<14:8>
PMDATL
—
PMDATH
Legend:
Note 1:
CONFIG1
CONFIG2
Legend:
—
107
PMDAT<13:8>
107
— = unimplemented location, read as ‘0’. Shaded cells are not used by Flash program memory.
Unimplemented, read as ‘1’.
TABLE 10-4:
Name
107
PMDAT
SUMMARY OF CONFIGURATION BITS ASSOCIATED WITH FLASH PROGRAM
MEMORY
Bits
Bit -/7
Bit -/6
Bit 13/5
Bit 12/4
Bit 11/3
13:8
—
—
—
—
CLKOUTEN
WDTE<1:0>
Bit 10/2
Bit 9/1
Bit 8/0
BOREN<1:0>
7:0
CP
MCLRE
PWRTE
—
13:8
—
—
LVP
DEBUG
LPBOR
BORV
7:0
ZCDDIS
—
—
—
—
PPS1WAY
—
FOSC<1:0>
STVREN
PLLEN
WRT<1:0>
Register
on Page
49
50
— = unimplemented location, read as ‘0’. Shaded cells are not used by Flash program memory.
 2013-2015 Microchip Technology Inc.
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11.0
I/O PORTS
FIGURE 11-1:
GENERIC I/O PORT
OPERATION
Each port has six standard registers for its operation.
These registers are:
• TRISx registers (data direction)
• PORTx registers (reads the levels on the pins of
the device)
• LATx registers (output latch)
• INLVLx (input level control)
• ODCONx registers (open drain)
• SLRCONx registers (slew rate
Some ports may have one or more of the following
additional registers. These registers are:
D
Write LATx
Write PORTx
TRISx
Q
CK
VDD
Data Register
Data Bus
I/O pin
• ANSELx (analog select)
• WPUx (weak pull-up)
Read PORTx
In general, when a peripheral is enabled on a port pin,
that pin cannot be used as a general purpose output.
However, the pin can still be read.
To digital peripherals
To analog peripherals
ANSELx
VSS
PIC16(L)F1703
●
PIC16(L)F1707
●
PORTC
Device
PORTB
PORT AVAILABILITY PER
DEVICE
PORTA
TABLE 11-1:
Read LATx
●
●
●
The Data Latch (LATx registers) is useful for
read-modify-write operations on the value that the I/O
pins are driving.
A write operation to the LATx register has the same
effect as a write to the corresponding PORTx register.
A read of the LATx register reads of the values held in
the I/O PORT latches, while a read of the PORTx
register reads the actual I/O pin value.
Ports that support analog inputs have an associated
ANSELx register. When an ANSEL bit is set, the digital
input buffer associated with that bit is disabled.
Disabling the input buffer prevents analog signal levels
on the pin between a logic high and low from causing
excessive current in the logic input circuitry. A
simplified model of a generic I/O port, without the
interfaces to other peripherals, is shown in Figure 11-1.
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11.1
11.1.1
PORTA Registers
DATA REGISTER
PORTA is a 6-bit wide, bidirectional port. The
corresponding data direction register is TRISA
(Register 11-2). Setting a TRISA bit (= 1) will make the
corresponding PORTA pin an input (i.e., disable the
output driver). Clearing a TRISA bit (= 0) will make the
corresponding PORTA pin an output (i.e., enables
output driver and puts the contents of the output latch
on the selected pin). The exception is RA3, which is
input-only and its TRIS bit will always read as ‘1’.
Example 11-1 shows how to initialize PORTA.
11.1.5
The INLVLA register (Register 11-8) controls the input
voltage threshold for each of the available PORTA input
pins. A selection between the Schmitt Trigger CMOS or
the TTL Compatible thresholds is available. The input
threshold is important in determining the value of a read
of the PORTA register and also the level at which an
interrupt-on-change occurs, if that feature is enabled.
See Table 26-4 for more information on threshold
levels.
Note:
Reading the PORTA register (Register 11-1) reads the
status of the pins, whereas writing to it will write to the
PORT latch. All write operations are read-modify-write
operations. Therefore, a write to a port implies that the
port pins are read, this value is modified and then
written to the PORT data latch (LATA).
11.1.2
DIRECTION CONTROL
The TRISA register (Register 11-2) controls the
PORTA pin output drivers, even when they are being
used as analog inputs. The user should ensure the bits
in the TRISA register are maintained set when using
them as analog inputs. I/O pins configured as analog
inputs always read ‘0’.
11.1.3
OPEN DRAIN CONTROL
The ODCONA register (Register 11-6) controls the
open-drain feature of the port. Open drain operation is
independently selected for each pin. When an
ODCONA bit is set, the corresponding port output
becomes an open drain driver capable of sinking
current only. When an ODCONA bit is cleared, the
corresponding port output pin is the standard push-pull
drive capable of sourcing and sinking current.
11.1.4
SLEW RATE CONTROL
The SLRCONA register (Register 11-7) controls the
slew rate option for each port pin. Slew rate control is
independently selectable for each port pin. When an
SLRCONA bit is set, the corresponding port pin drive is
slew rate limited. When an SLRCONA bit is cleared,
The corresponding port pin drive slews at the maximum
rate possible.
 2013-2015 Microchip Technology Inc.
INPUT THRESHOLD CONTROL
11.1.6
Changing the input threshold selection
should be performed while all peripheral
modules are disabled. Changing the
threshold level during the time a module is
active may inadvertently generate a
transition associated with an input pin,
regardless of the actual voltage level on
that pin.
ANALOG CONTROL
The ANSELA register (Register 11-4) is used to
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELA bit high will cause all
digital reads on the pin to be read as ‘0’ and allow
analog functions on the pin to operate correctly.
The state of the ANSELA bits has no effect on digital
output functions. A pin with TRIS clear and ANSEL set
will still operate as a digital output, but the Input mode
will be analog. This can cause unexpected behavior
when executing read-modify-write instructions on the
affected port.
Note:
The ANSELA bits default to the Analog
mode after Reset. To use any pins as
digital general purpose or peripheral
inputs, the corresponding ANSEL bits
must be initialized to ‘0’ by user software.
EXAMPLE 11-1:
;
;
;
;
INITIALIZING PORTA
This code example illustrates
initializing the PORTA register. The
other ports are initialized in the same
manner.
BANKSEL
CLRF
BANKSEL
CLRF
BANKSEL
CLRF
BANKSEL
MOVLW
MOVWF
PORTA
PORTA
LATA
LATA
ANSELA
ANSELA
TRISA
B'00111000'
TRISA
;
;Init PORTA
;Data Latch
;
;
;digital I/O
;
;Set RA<5:3> as inputs
;and set RA<2:0> as
;outputs
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11.1.7
PORTA FUNCTIONS AND OUTPUT
PRIORITIES
Each PORTA pin is multiplexed with other functions.
Each pin defaults to the PORT latch data after reset.
Other functions are selected with the peripheral pin
select logic. See Section 12.0 “Peripheral Pin Select
(PPS) Module” for more information.
Analog input functions, such as ADC inputs, are not
shown in the peripheral pin select lists. These inputs
are active when the I/O pin is set for Analog mode using
the ANSELA register. Digital output functions may
continue to control the pin when it is in Analog mode.
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11.2
Register Definitions: PORTA
REGISTER 11-1:
PORTA: PORTA REGISTER
U-0
U-0
R/W-x/x
R/W-x/x
R-x/x
R/W-x/x
R/W-x/x
R/W-x/x
—
—
RA5
RA4
RA3
RA2
RA1
RA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
RA<5:0>: PORTA I/O Value bits(1)
1 = Port pin is > VIH
0 = Port pin is < VIL
Note 1:
Writes to PORTA are actually written to corresponding LATA register. Reads from PORTA register is return
of actual I/O pin values.
REGISTER 11-2:
TRISA: PORTA TRI-STATE REGISTER
U-0
U-0
R/W-1/1
R/W-1/1
U-1
R/W-1/1
R/W-1/1
R/W-1/1
—
—
TRISA5
TRISA4
—(1)
TRISA2
TRISA1
TRISA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
TRISA<5:4>: PORTA Tri-State Control bit
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
bit 3
Unimplemented: Read as ‘1’
bit 2-0
TRISA<2:0>: PORTA Tri-State Control bit
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
Note 1:
Unimplemented, read as ‘1’.
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REGISTER 11-3:
LATA: PORTA DATA LATCH REGISTER
U-0
U-0
R/W-x/u
R/W-x/u
U-0
R/W-x/u
R/W-x/u
R/W-x/u
—
—
LATA5
LATA4
—
LATA2
LATA1
LATA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
LATA<5:4>: RA<5:4> Output Latch Value bits(1)
bit 3
Unimplemented: Read as ‘0’
bit 2-0
LATA<2:0>: RA<2:0> Output Latch Value bits(1)
Note 1:
Writes to PORTA are actually written to corresponding LATA register. Reads from PORTA register is return
of actual I/O pin values.
REGISTER 11-4:
ANSELA: PORTA ANALOG SELECT REGISTER
U-0
U-0
U-0
R/W-1/1
U-0
R/W-1/1
R/W-1/1
R/W-1/1
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-5
Unimplemented: Read as ‘0’
bit 4
ANSA4: Analog Select between Analog or Digital Function on pin RA4
1 = Analog input. Pin is assigned as analog input(1). Digital input buffer disabled.
0 = Digital I/O. Pin is assigned to port or digital special function.
bit 3
Unimplemented: Read as ‘0’
bit 2-0
ANSA<2:0>: Analog Select between Analog or Digital Function on pins RA<2:0>, respectively
1 = Analog input. Pin is assigned as analog input(1). Digital input buffer disabled.
0 = Digital I/O. Pin is assigned to port or digital special function.
Note 1:
When setting a pin to an analog input, the corresponding TRIS bit must be set to Input mode in order to
allow external control of the voltage on the pin.
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REGISTER 11-5:
WPUA: WEAK PULL-UP PORTA REGISTER
U-0
U-0
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
—
—
WPUA5
WPUA4
WPUA3
WPUA2
WPUA1
WPUA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
WPUA<5:0>: Weak Pull-up Register bits
1 = Pull-up enabled
0 = Pull-up disabled
Note 1:
2:
Global WPUEN bit of the OPTION_REG register must be cleared for individual pull-ups to be enabled.
The weak pull-up device is automatically disabled if the pin is configured as an output.
REGISTER 11-6:
ODCONA: PORTA OPEN DRAIN CONTROL REGISTER
U-0
U-0
R/W-0/0
R/W-0/0
U-0
R/W-0/0
R/W-0/0
R/W-0/0
—
—
ODA5
ODA4
—
ODA2
ODA1
ODA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
ODA<5:4>: PORTA Open Drain Enable bits
For RA<5:4> pins, respectively
1 = Port pin operates as open-drain drive (sink current only)
0 = Port pin operates as standard push-pull drive (source and sink current)
bit 3
Unimplemented: Read as ‘0’
bit 2-0
ODA<2:0>: PORTA Open Drain Enable bits
For RA<2:0> pins, respectively
1 = Port pin operates as open-drain drive (sink current only)
0 = Port pin operates as standard push-pull drive (source and sink current)
 2013-2015 Microchip Technology Inc.
DS40001722C-page 115
PIC16(L)F1703/7
REGISTER 11-7:
SLRCONA: PORTA SLEW RATE CONTROL REGISTER
U-0
U-0
R/W-1/1
R/W-1/1
U-0
R/W-1/1
R/W-1/1
R/W-1/1
—
—
SLRA5
SLRA4
—
SLRA2
SLRA1
SLRA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
SLRA<5:4>: PORTA Slew Rate Enable bits
For RA<5:4> pins, respectively
1 = Port pin slew rate is limited
0 = Port pin slews at maximum rate
bit 3
Unimplemented: Read as ‘0’
bit 2-0
SLRA<2:0>: PORTA Slew Rate Enable bits
For RA<2:0> pins, respectively
1 = Port pin slew rate is limited
0 = Port pin slews at maximum rate
REGISTER 11-8:
INLVLA: PORTA INPUT LEVEL CONTROL REGISTER
U-0
U-0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
—
—
INLVLA5
INLVLA4
INLVLA3
INLVLA2
INLVLA1
INLVLA0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
INLVLA<5:0>: PORTA Input Level Select bits
For RA<5:0> pins, respectively
1 = ST input used for PORT reads and interrupt-on-change
0 = TTL input used for PORT reads and interrupt-on-change
DS40001722C-page 116
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 11-2:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
ANSELA
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
114
INLVLA
—
—
INLVLA5
INLVLA4
INLVLA3
INLVLA2
INLVLA1
INLVLA0
116
LATA
—
—
LATA5
LATA4
—
LATA2
LATA1
LATA0
114
ODCONA
—
—
ODA5
ODA4
—
ODA2
ODA1
ODA0
115
WPUEN
INTEDG
TMR0CS
TMR0SE
PSA
PORTA
OPTION_REG
—
—
RA5
RA4
RA3
SLRCONA
—
—
SLRA5
SLRA4
—
SLRA2
SLRA1
SLRA0
116
TRISA
—
—
TRISA5
TRISA4
—(1)
TRISA2
TRISA1
TRISA0
113
—
—
WPUA5
WPUA4
WPUA3
WPUA2
WPUA1
WPUA0
115
WPUA
Legend:
Note 1:
CONFIG1
CONFIG2
Legend:
168
RA1
RA0
113
x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by PORTA.
Unimplemented, read as ‘1’.
TABLE 11-3:
Name
PS<2:0>
RA2
SUMMARY OF CONFIGURATION BITS ASSOCIATED WITH PORTA
Bits
Bit -/7
Bit -/6
Bit 13/5
Bit 12/4
Bit 11/3
13:8
—
—
—
—
CLKOUTEN
7:0
CP
MCLRE
PWRTE
13:8
—
—
LVP
7:0
ZCDDIS
—
—
WDTE<1:0>
DEBUG
—
LPBOR
—
Bit 10/2
Bit 9/1
Bit 8/0
BOREN<1:0>
—
BORV
PPS1WAY
—
FOSC<1:0>
STVREN
PLLEN
WRT<1:0>
Register
on Page
49
50
— = unimplemented location, read as ‘0’. Shaded cells are not used by PORTA.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 117
PIC16(L)F1703/7
11.3
PORTB Registers
(PIC16(L)F1707 only)
PORTB is a 4-bit wide, bidirectional port. The
corresponding data direction register is TRISB
(Register 11-10). Setting a TRISB bit (= 1) will make the
corresponding PORTB pin an input (i.e., put the
corresponding output driver in a High-Impedance mode).
Clearing a TRISB bit (= 0) will make the corresponding
PORTB pin an output (i.e., enable the output driver and
put the contents of the output latch on the selected pin).
Example 11-1 shows how to initialize an I/O port.
11.3.4
The INLVLB register (Register 11-16) controls the input
voltage threshold for each of the available PORTB input
pins. A selection between the Schmitt Trigger CMOS or
the TTL Compatible thresholds is available. The input
threshold is important in determining the value of a read
of the PORTB register and also the level at which an
interrupt-on-change occurs, if that feature is enabled.
See Table 26-4 for more information on threshold levels.
Note:
Reading the PORTB register (Register 11-9) reads the
status of the pins, whereas writing to it will write to the
PORT latch. All write operations are read-modify-write
operations. Therefore, a write to a port implies that the
port pins are read, this value is modified and then written
to the PORT data latch (LATB).
11.3.1
DIRECTION CONTROL
The TRISB register (Register 11-10) controls the
PORTB pin output drivers, even when they are being
used as analog inputs. The user should ensure the bits in
the TRISB register are maintained set when using them
as analog inputs. I/O pins configured as analog inputs
always read ‘0’.
11.3.2
OPEN DRAIN CONTROL
The ODCONB register (Register 11-14) controls the
open-drain feature of the port. Open drain operation is
independently selected for each pin. When an
ODCONB bit is set, the corresponding port output
becomes an open drain driver capable of sinking
current only. When an ODCONB bit is cleared, the
corresponding port output pin is the standard push-pull
drive capable of sourcing and sinking current.
11.3.3
11.3.5
DS40001722C-page 118
Changing the input threshold selection
should be performed while all peripheral
modules are disabled. Changing the
threshold level during the time a module is
active may inadvertently generate a
transition associated with an input pin,
regardless of the actual voltage level on
that pin.
ANALOG CONTROL
The ANSELB register (Register 11-12) is used to
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELB bit high will cause all
digital reads on the pin to be read as ‘0’ and allow
analog functions on the pin to operate correctly.
The state of the ANSELB bits has no effect on digital output functions. A pin with TRIS clear and ANSELB set will
still operate as a digital output, but the Input mode will be
analog. This can cause unexpected behavior when executing read-modify-write instructions on the affected
port.
Note:
SLEW RATE CONTROL
The SLRCONB register (Register 11-15) controls the
slew rate option for each port pin. Slew rate control is
independently selectable for each port pin. When an
SLRCONB bit is set, the corresponding port pin drive is
slew rate limited. When an SLRCONB bit is cleared,
The corresponding port pin drive slews at the maximum
rate possible.
INPUT THRESHOLD CONTROL
11.3.6
The ANSELB bits default to the Analog
mode after Reset. To use any pins as
digital general purpose or peripheral
inputs, the corresponding ANSEL bits
must be initialized to ‘0’ by user software.
PORTB FUNCTIONS AND OUTPUT
PRIORITIES
Each pin defaults to the PORT latch data after reset.
Other functions are selected with the peripheral pin
select logic. See Section 12.0 “Peripheral Pin Select
(PPS) Module” for more information. Analog input
functions, such as ADC and Op Amp inputs, are not
shown in the peripheral pin select lists. These inputs
are active when the I/O pin is set for Analog mode using
the ANSELB register. Digital output functions may
continue to control the pin when it is in Analog mode.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
11.4
Register Definitions: PORTB
REGISTER 11-9:
PORTB: PORTB REGISTER
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
U-0
U-0
U-0
U-0
RB7
RB6
RB5
RB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
RB<7:4>: PORTB General Purpose I/O Pin bits(1)
1 = Port pin is > VIH
0 = Port pin is < VIL
bit 3-0
Unimplemented: Read as ‘0’
Note 1:
Writes to PORTB are actually written to corresponding LATB register. Reads from PORTB register is return of
actual I/O pin values.
REGISTER 11-10: TRISB: PORTB TRI-STATE REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
U-0
U-0
U-0
U-0
TRISB7
TRISB6
TRISB5
TRISB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
TRISB<7:4>: PORTB Tri-State Control bits
1 = PORTB pin configured as an input (tri-stated)
0 = PORTB pin configured as an output
bit 3-0
Unimplemented: Read as ‘0’
REGISTER 11-11: LATB: PORTB DATA LATCH REGISTER
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
U-0
U-0
U-0
U-0
LATB7
LATB6
LATB5
LATB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
LATB<7:4>: PORTB Output Latch Value bits(1)
bit 3-0
Unimplemented: Read as ‘0’
Note 1:
Writes to PORTB are actually written to corresponding LATB register. Reads from PORTB register is return of
actual I/O pin values.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 119
PIC16(L)F1703/7
REGISTER 11-12: ANSELB: PORTB ANALOG SELECT REGISTER
U-0
U-0
R/W-1/1
R/W-1/1
U-0
U-0
U-0
U-0
—
—
ANSB5
ANSB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
ANSB<5:4>: Analog Select between Analog or Digital Function on pins RB<5:4>, respectively
0 = Digital I/O. Pin is assigned to port or digital special function.
1 = Analog input. Pin is assigned as analog input(1). Digital input buffer disabled.
bit 3-0
Unimplemented: Read as ‘0’
Note 1:
When setting a pin to an analog input, the corresponding TRIS bit must be set to Input mode in order to
allow external control of the voltage on the pin.
REGISTER 11-13: WPUB: WEAK PULL-UP PORTB REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
U-0
U-0
U-0
U-0
WPUB7
WPUB6
WPUB5
WPUB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
WPUB<7:4>: Weak Pull-up Register bits
1 = Pull-up enabled
0 = Pull-up disabled
bit 3-0
Unimplemented: Read as ‘0’
Note 1:
2:
Global WPUEN bit of the OPTION_REG register must be cleared for individual pull-ups to be enabled.
The weak pull-up device is automatically disabled if the pin is configured as an output.
DS40001722C-page 120
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
REGISTER 11-14: ODCONB: PORTB OPEN DRAIN CONTROL REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
U-0
U-0
U-0
U-0
ODB7
ODB6
ODB5
ODB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
ODB<7:4>: PORTB Open Drain Enable bits
For RB<7:4> pins, respectively
1 = Port pin operates as open-drain drive (sink current only)
0 = Port pin operates as standard push-pull drive (source and sink current)
bit 3-0
Unimplemented: Read as ‘0’
REGISTER 11-15: SLRCONB: PORTB SLEW RATE CONTROL REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
U-0
U-0
U-0
U-0
SLRB7
SLRB6
SLRB5
SLRB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
SLRB<7:4>: PORTB Slew Rate Enable bits
For RB<7:4> pins, respectively
1 = Port pin slew rate is limited
0 = Port pin slews at maximum rate
bit 3-0
Unimplemented: Read as ‘0’
REGISTER 11-16: INLVLB: PORTB INPUT LEVEL CONTROL REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
U-0
U-0
U-0
U-0
INLVLB7
INLVLB6
INLVLB5
INLVLB4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
INLVLB<7:4>: PORTB Input Level Select bits
For RB<7:4> pins, respectively
1 = ST input used for PORT reads and interrupt-on-change
0 = TTL input used for PORT reads and interrupt-on-change
bit 3-0
Unimplemented: Read as ‘0’
 2013-2015 Microchip Technology Inc.
DS40001722C-page 121
PIC16(L)F1703/7
TABLE 11-4:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
—
—
ANSB5
ANSB4
—
—
—
—
120
INLVLB7
INLVLB6
INLVLB5
INLVLB4
—
—
—
—
121
LATB
LATB7
LATB6
LATB5
LATB4
—
—
—
—
119
ODCONB
ODB7
ODB6
ODB5
ODB4
—
—
—
—
121
RB7
RB6
RB5
RB4
—
—
—
—
119
SLRB7
SLRB6
SLRB5
SLRB4
—
—
—
—
121
Name
ANSELB
INLVLB
PORTB
SLRCONB
TRISB
TRISB7
TRISB6
TRISB5
TRISB4
—
—
—
—
121
WPUB
WPUB7
WPUB6
WPUB5
WPUB4
—
—
—
—
120
Legend:
x = unknown, u = unchanged, - = unimplemented locations read as ‘0’. Shaded cells are not used by
PORTB.
DS40001722C-page 122
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
11.5
11.5.1
PORTC Registers
DATA REGISTER
PORTC is a 6-bit wide bidirectional port in the
PIC16(L)F1703 device and 8-bit wide bidirectional port in
the PIC16(L)F1707 device. The corresponding data
direction register is TRISC (Register 11-18). Setting a
TRISC bit (= 1) will make the corresponding PORTC pin
an input (i.e., put the corresponding output driver in a
High-Impedance mode). Clearing a TRISC bit (= 0) will
make the corresponding PORTC pin an output (i.e.,
enable the output driver and put the contents of the
output latch on the selected pin). Example 11-1 shows
how to initialize an I/O port.
Reading the PORTC register (Register 11-17) reads the
status of the pins, whereas writing to it will write to the
PORT latch. All write operations are read-modify-write
operations. Therefore, a write to a port implies that the
port pins are read, this value is modified and then written
to the PORT data latch (LATC).
11.5.2
DIRECTION CONTROL
The TRISC register (Register 11-18) controls the
PORTC pin output drivers, even when they are being
used as analog inputs. The user should ensure the bits in
the TRISC register are maintained set when using them
as analog inputs. I/O pins configured as analog inputs
always read ‘0’.
11.5.3
INPUT THRESHOLD CONTROL
The INLVLC register (Register 11-24) controls the input
voltage threshold for each of the available PORTC
input pins. A selection between the Schmitt Trigger
CMOS or the TTL Compatible thresholds is available.
The input threshold is important in determining the
value of a read of the PORTC register and also the
level at which an interrupt-on-change occurs, if that
feature is enabled. See Table 26-4 for more information
on threshold levels.
Note:
Changing the input threshold selection
should be performed while all peripheral
modules are disabled. Changing the
threshold level during the time a module is
active may inadvertently generate a
transition associated with an input pin,
regardless of the actual voltage level on
that pin.
 2013-2015 Microchip Technology Inc.
11.5.4
OPEN DRAIN CONTROL
The ODCONC register (Register 11-22) controls the
open-drain feature of the port. Open drain operation is
independently selected for each pin. When an
ODCONC bit is set, the corresponding port output
becomes an open drain driver capable of sinking
current only. When an ODCONC bit is cleared, the
corresponding port output pin is the standard push-pull
drive capable of sourcing and sinking current.
11.5.5
SLEW RATE CONTROL
The SLRCONC register (Register 11-23) controls the
slew rate option for each port pin. Slew rate control is
independently selectable for each port pin. When an
SLRCONC bit is set, the corresponding port pin drive is
slew rate limited. When an SLRCONC bit is cleared,
The corresponding port pin drive slews at the maximum
rate possible.
11.5.6
ANALOG CONTROL
The ANSELC register (Register 11-20) is used to
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELC bit high will cause all
digital reads on the pin to be read as ‘0’ and allow
analog functions on the pin to operate correctly.
The state of the ANSELC bits has no effect on digital output functions. A pin with TRIS clear and ANSELC set will
still operate as a digital output, but the Input mode will be
analog. This can cause unexpected behavior when executing read-modify-write instructions on the affected
port.
Note:
11.5.7
The ANSELC bits default to the Analog
mode after Reset. To use any pins as
digital general purpose or peripheral
inputs, the corresponding ANSEL bits
must be initialized to ‘0’ by user software.
PORTC FUNCTIONS AND OUTPUT
PRIORITIES
Each pin defaults to the PORT latch data after reset.
Other functions are selected with the peripheral pin
select logic. See Section 12.0 “Peripheral Pin Select
(PPS) Module” for more information.
Analog input functions, such as ADC inputs, are not
shown in the peripheral pin select lists. These inputs
are active when the I/O pin is set for Analog mode using
the ANSELC register. Digital output functions may
continue to control the pin when it is in Analog mode.
DS40001722C-page 123
PIC16(L)F1703/7
11.6
Register Definitions: PORTC
REGISTER 11-17: PORTC: PORTC REGISTER
R/W-x/u
R/W-x/u
(2)
RC6
RC7
(2)
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
RC5
RC4
RC3
RC2
RC1
RC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
RC<7:0>: PORTC General Purpose I/O Pin bits(1, 2)
1 = Port pin is > VIH
0 = Port pin is < VIL
bit 7-0
Note 1:
2:
Writes to PORTC are actually written to corresponding LATC register. Reads from PORTC register is return of actual
I/O pin values.
RC<7:6> are available on PIC16(L)F1707 only.
REGISTER 11-18: TRISC: PORTC TRI-STATE REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
TRISC7(1)
TRISC6(1)
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
TRISC<7:0>: PORTC Tri-State Control bits(1)
1 = PORTC pin configured as an input (tri-stated)
0 = PORTC pin configured as an output
bit 7-0
Note 1:
TRISC<7:6> are available on PIC16(L)F1707 only.
REGISTER 11-19: LATC: PORTC DATA LATCH REGISTER
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
LATC7(1)
LATC6(1)
LATC5
LATC4
LATC3
LATC2
LATC1
LATC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
Note 1:
LATC<7:0>: PORTC Output Latch Value bits(1)
LATC<7:6> are available on PIC16(L)F1707 only.
DS40001722C-page 124
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
REGISTER 11-20: ANSELC: PORTC ANALOG SELECT REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
ANSC7(2)
ANSC6(2)
ANSC5(3)
ANSC4(3)
ANSC3
ANSC2
ANSC1
ANSC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
ANSC<7:0>: Analog Select between Analog or Digital Function on pins RC<7:0>, respectively(1)
0 = Digital I/O. Pin is assigned to port or digital special function.
1 = Analog input. Pin is assigned as analog input(1). Digital input buffer disabled.
bit 7-0
When setting a pin to an analog input, the corresponding TRIS bit must be set to Input mode in order to
allow external control of the voltage on the pin.
ANSC<7:6> are available on PIC16(L)F1707 only.
ANSC<5:4> are available on PIC16(L)F1703 only.
Note 1:
2:
3:
REGISTER 11-21: WPUC: WEAK PULL-UP PORTC REGISTER
R/W-1/1
WPUC7
R/W-1/1
(3)
(3)
WPUC6
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
WPUC5
WPUC4
WPUC3
WPUC2
WPUC1
WPUC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
Note 1:
2:
3:
WPUC<7:0>: Weak Pull-up Register bits(3)
1 = Pull-up enabled
0 = Pull-up disabled
Global WPUEN bit of the OPTION_REG register must be cleared for individual pull-ups to be enabled.
The weak pull-up device is automatically disabled if the pin is configured as an output.
WPUC<7:6> are available on PIC16(L)F1707 only.
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REGISTER 11-22: ODCONC: PORTC OPEN DRAIN CONTROL REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
ODC7(1)
ODC6(1)
ODC5
ODC4
ODC3
ODC2
ODC1
ODC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
ODC<7:0>: PORTC Open Drain Enable bits(1)
For RC<7:0> pins, respectively
1 = Port pin operates as open-drain drive (sink current only)
0 = Port pin operates as standard push-pull drive (source and sink current)
bit 7-0
Note 1:
ODC<7:6> are available on PIC16(L)F1707 only.
REGISTER 11-23: SLRCONC: PORTC SLEW RATE CONTROL REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
SLRC7(1)
SLRC6(1)
SLRC5
SLRC4
SLRC3
SLRC2
SLRC1
SLRC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
SLRC<7:0>: PORTC Slew Rate Enable bits(1)
For RC<7:0> pins, respectively
1 = Port pin slew rate is limited
0 = Port pin slews at maximum rate
bit 7-0
Note 1:
SLRC<7:6> are available on PIC16(L)F1707 only.
REGISTER 11-24: INLVLC: PORTC INPUT LEVEL CONTROL REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
INLVLC7(1)
INLVLC6(1)
INLVLC5
INLVLC4
INLVLC3
INLVLC2
INLVLC1
INLVLC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
Note 1:
INLVLC<7:0>: PORTC Input Level Select bits(1)
For RC<7:0> pins, respectively
1 = ST input used for PORT reads and interrupt-on-change
0 = TTL input used for PORT reads and interrupt-on-change
INLVLC<7:6> are available on PIC16(L)F1707 only.
DS40001722C-page 126
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TABLE 11-5:
Name
ANSELC
ANSC6(1)
LATC7
(1)
SLRCONC
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
ANSC5(2) ANSC4(2)
ANSC3
ANSC2
ANSC1
ANSC0
125
INLVLC1 INLVLC0
126
Bit 5
(1)
INLVLC6
Bit 4
INLVLC5
INLVLC4
INLVLC3
INLVLC2
(1)
LATC5
LATC4
LATC3
LATC2
LATC1
LATC0
(1)
LATC6
ODC5
ODC4
ODC3
ODC2
ODC1
ODC0
126
RC6(1)
RC5
RC4
RC3
RC2
RC1
RC0
124
SLRC7(1)
SLRC6(1)
SLRC5
SLRC4
SLRC3
SLRC2
SLRC1
SLRC0
126
(1)
(1)
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
124
(1)
WPUC5
WPUC4
WPUC3
WPUC2
WPUC1
WPUC0
125
TRISC7
(1)
WPUC7
ODC6
124
RC7(1)
ODC7
PORTC
Note 1:
2:
ANSC7(1)
(1)
ODCONC
Legend:
Bit 6
INLVLC7
LATC
WPUC
Bit 7
(1)
INLVLC
TRISC
SUMMARY OF REGISTERS ASSOCIATED WITH PORTC
TRISC6
WPUC6
x = unknown, u = unchanged, - = unimplemented locations read as ‘0’. Shaded cells are not used by
PORTC.
PIC16(L)F1707 only.
PIC16(L)F1703 only.
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PIC16(L)F1703/7
12.0
PERIPHERAL PIN SELECT
(PPS) MODULE
The Peripheral Pin Select (PPS) module connects
peripheral inputs and outputs to the device I/O pins.
Only digital signals are included in the selections. All
analog inputs and outputs remain fixed to their
assigned pins. Input and output selections are
independent as shown in the simplified block diagram
Figure 12-1.
12.1
PPS Inputs
Each peripheral has a PPS register with which the
inputs to the peripheral are selected. Inputs include the
device pins.
Multiple peripherals can operate from the same source
simultaneously. Port reads always return the pin level
regardless of peripheral PPS selection. If a pin also has
associated analog functions, the ANSEL bit for that pin
must be cleared to enable the digital input buffer.
Although every peripheral has its own PPS input selection register, the selections are identical for every
peripheral
as
shown
in
Register 12-1
for
PIC16(L)F1703 devices and Register 12-2 for
PIC16(L)F1707 devices.
Note:
12.2
PPS Outputs
Each I/O pin has a PPS register with which the pin
output source is selected. With few exceptions, the port
TRIS control associated with that pin retains control
over the pin output driver. Peripherals that control the
pin output driver as part of the peripheral operation will
override the TRIS control as needed. These
peripherals include:
• MSSP (I2C)
Although every pin has its own PPS peripheral
selection register, the selections are identical for every
pin as shown in Register 12-3.
Note:
FIGURE 12-1:
The notation “xxx” in the register name is
a place holder for the peripheral identifier.
For example, CCP1PPS.
The notation “Rxy” is a place holder for the
pin identifier. For example, RA0PPS.
SIMPLIFIED PPS BLOCK DIAGRAM
PPS Outputs
RA0PPS
PPS Inputs
abcPPS
RA0
RA0
Peripheral abc
RxyPPS
Rxy
Peripheral xyz
RC7
xyzPPS
DS40001722C-page 128
RC7PPS
RC7
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
12.3
Bidirectional Pins
PPS selections for peripherals with bidirectional
signals on a single pin must be made so that the PPS
input and PPS output select the same pin. Peripherals
that have bidirectional signals include:
• MSSP (I2C)
Note:
The I2C default input pins are I2C and
SMBus compatible and are the only pins
on the device with this compatibility.
12.5
The PPS can be permanently locked by setting the
PPS1WAY Configuration bit. When this bit is set, the
PPSLOCKED bit can only be cleared and set one time
after a device Reset. This allows for clearing the
PPSLOCKED bit so that the input and output selections
can be made during initialization. When the
PPSLOCKED bit is set after all selections have been
made, it will remain set and cannot be cleared until after
the next device Reset event.
12.6
12.4
PPS Lock
The PPS includes a mode in which all input and output
selections can be locked to prevent inadvertent
changes. PPS selections are locked by setting the
PPSLOCKED bit of the PPSLOCK register. Setting and
clearing this bit requires a special sequence as an extra
precaution against inadvertent changes. Examples of
setting and clearing the PPSLOCKED bit are shown in
Example 12-1.
EXAMPLE 12-1:
PPS Permanent Lock
Operation During Sleep
PPS input and output selections are unaffected by
Sleep.
12.7
Effects of a Reset
A device Power-On-Reset (POR) clears all PPS input
and output selections to their default values. All other
Resets leave the selections unchanged. Default input
selections are shown in pin allocation Table 1 and
Table 2.
PPS LOCK/UNLOCK
SEQUENCE
; suspend interrupts
bcf
INTCON,GIE
;
BANKSEL PPSLOCK
; set bank
; required sequence, next 5 instructions
movlw
0x55
movwf
PPSLOCK
movlw
0xAA
movwf
PPSLOCK
; Set PPSLOCKED bit to disable writes or
; Clear PPSLOCKED bit to enable writes
bsf
PPSLOCK,PPSLOCKED
; restore interrupts
bsf
INTCON,GIE
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PIC16(L)F1703/7
12.8
Register Definitions: PPS Input Selection
REGISTER 12-1:
xxxPPS: PERIPHERAL xxx INPUT SELECTION (PIC16(L)F1703)
U-0
U-0
U-0
—
—
—
R/W-q/u
R/W-q/u
R/W-q/u
R/W-q/u
R/W-q/u
xxxPPS<4:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = value depends on peripheral
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
xxxPPS<4:0>: Peripheral xxx Input Selection bits
11xxx = Reserved. Do not use.
1011x = Reserved. Do not use.
10101 = Peripheral input is RC5
10100 = Peripheral input is RC4
10011 = Peripheral input is RC3
10010 = Peripheral input is RC2
10001 = Peripheral input is RC1
10000 = Peripheral input is RC0
01xxx = Reserved. Do not use.
0011X = Reserved. Do not use.
00101 = Peripheral input is RA5
00100 = Peripheral input is RA4
00011 = Peripheral input is RA3
00010 = Peripheral input is RA2
00001 = Peripheral input is RA1
00000 = Peripheral input is RA0
DS40001722C-page 130
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PIC16(L)F1703/7
REGISTER 12-2:
xxxPPS: PERIPHERAL xxx INPUT SELECTION (PIC16(L)F1707)
U-0
U-0
U-0
—
—
—
R/W-q/u
R/W-q/u
R/W-q/u
R/W-q/u
R/W-q/u
xxxPPS<4:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = value depends on peripheral
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
xxxPPS<4:0>: Peripheral xxx Input Selection bits
11xxx = Reserved. Do not use.
10111 = Peripheral input is RC7
10110 = Peripheral input is RC6
10101 = Peripheral input is RC5
10100 = Peripheral input is RC4
10011 = Peripheral input is RC3
10010 = Peripheral input is RC2
10001 = Peripheral input is RC1
10000 = Peripheral input is RC0
01111 = Peripheral input is RB7
01110 = Peripheral input is RB6
01101 = Peripheral input is RB5
01100 = Peripheral input is RB4
010xx = Reserved. Do not use.
0011X = Reserved. Do not use.
00101 = Peripheral input is RA5
00100 = Peripheral input is RA4
00011 = Peripheral input is RA3
00010 = Peripheral input is RA2
00001 = Peripheral input is RA1
00000 = Peripheral input is RA0
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DS40001722C-page 131
PIC16(L)F1703/7
REGISTER 12-3:
RxyPPS: PIN Rxy OUTPUT SOURCE SELECTION REGISTER
U-0
U-0
U-0
—
—
—
R/W-0/u
R/W-0/u
R/W-0/u
R/W-0/u
R/W-0/u
RxyPPS<4:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
RxyPPS<4:0>: Pin Rxy Output Source Selection bits
11xxx = Reserved
10111 = Rxy source is C2OUT
10110 = Rxy source is C1OUT
10101 = Reserved
10100 = Reserved
10011 = Reserved
10010 = Rxy source is SDO
10001 = Rxy source is SDA(1)
10000 = Rxy source is SCK/SCL(1)
01111 = Reserved
01110 = Reserved
01101 = Rxy source is CCP2
01100 = Rxy source is CCP1
01011 = Reserved
01010 = Reserved
01001 = Reserved
01000 = Reserved
00111 = Reserved
00110 = Reserved
00101 = Reserved
00100 = Reserved
00011 = Reserved
00010 = Reserved
00001 = Reserved
00000 = Rxy source is LATxy
Note 1:
TRIS control is overridden by the peripheral as required.
DS40001722C-page 132
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
REGISTER 12-4:
PPSLOCK: PPS LOCK REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0/0
—
—
—
—
—
—
—
PPSLOCKED
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-1
Unimplemented: Read as ‘0’
bit 0
PPSLOCKED: PPS Locked bit
1= PPS is locked. PPS selections can not be changed.
0= PPS is not locked. PPS selections can be changed.
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PIC16(L)F1703/7
TABLE 12-1:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH THE PPS MODULE
Bit 2
Bit 1
Bit 0
Register
on page
—
—
PPSLOCKED
133
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
PPSLOCK
—
—
—
—
—
INTPPS
—
—
—
INTPPS<4:0>
131
T0CKIPPS
—
—
—
T0CKIPPS<4:0>
131
T1CKIPPS
—
—
—
T1CKIPPS<4:0>
131
T1GPPS
—
—
—
T1GPPS<4:0>
131
CCP1PPS
—
—
—
CCP1PPS<4:0>
131
CCP2PPS
—
—
—
CCP2PPS<4:0>
131
SSPCLKPPS
—
—
—
SSPCLKPPS<4:0>
131
SSPDATPPS
—
—
—
SSPDATPPS<4:0>
131
SSPSSPPS
—
—
—
SSPSSPPS<4:0>
131
RA0PPS
—
—
—
RA0PPS<4:0>
132
RA1PPS
—
—
—
RA1PPS<4:0>
132
RA2PPS
—
—
—
RA2PPS<4:0>
132
RA4PPS
—
—
—
RA4PPS<4:0>
132
RA5PPS
—
—
—
RA5PPS<4:0>
132
RB4PPS(1)
—
—
—
RB4PPS<4:0>
132
(1)
—
—
—
RB5PPS<4:0>
132
RB6PPS(1)
—
—
—
RB6PPS<4:0>
132
RB7PPS(1)
—
—
—
RB7PPS<4:0>
132
RC0PPS
—
—
—
RC0PPS<4:0>
132
RC1PPS
—
—
—
RC1PPS<4:0>
132
RC2PPS
—
—
—
RC2PPS<4:0>
132
RC3PPS
—
—
—
RC3PPS<4:0>
132
RC4PPS
—
—
—
RC4PPS<4:0>
132
RC5PPS
—
—
—
RC5PPS<4:0>
132
(1)
—
—
—
RC6PPS<4:0>
132
RC7PPS(1)
—
—
—
RC7PPS<4:0>
132
RB5PPS
RC6PPS
Legend: — = unimplemented, read as ‘0’.
Note 1: PIC16(L)F1707 only.
DS40001722C-page 134
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
13.0
INTERRUPT-ON-CHANGE
All pins on all ports can be configured to operate as
Interrupt-On-Change (IOC) pins. An interrupt can be
generated by detecting a signal that has either a rising
edge or a falling edge. Any individual pin, or combination
of pins, can be configured to generate an interrupt. The
interrupt-on-change module has the following features:
•
•
•
•
Interrupt-on-Change enable (Master Switch)
Individual pin configuration
Rising and falling edge detection
Individual pin interrupt flags
Figure 13-1 is a block diagram of the IOC module.
13.1
Enabling the Module
13.3
Interrupt Flags
The bits located in the IOCxF registers are status flags
that correspond to the interrupt-on-change pins of each
port. If an expected edge is detected on an appropriately
enabled pin, then the status flag for that pin will be set,
and an interrupt will be generated if the IOCIE bit is set.
The IOCIF bit of the INTCON register reflects the status
of all IOCxF bits.
13.4
Clearing Interrupt Flags
The individual status flags, (IOCxF register bits), can be
cleared by resetting them to zero. If another edge is
detected during this clearing operation, the associated
status flag will be set at the end of the sequence,
regardless of the value actually being written.
To allow individual pins to generate an interrupt, the
IOCIE bit of the INTCON register must be set. If the
IOCIE bit is disabled, the edge detection on the pin will
still occur, but an interrupt will not be generated.
In order to ensure that no detected edge is lost while
clearing flags, only AND operations masking out known
changed bits should be performed. The following
sequence is an example of what should be performed.
13.2
Individual Pin Configuration
EXAMPLE 13-1:
For each pin, a rising edge detector and a falling edge
detector are present. To enable a pin to detect a rising
edge, the associated bit of the IOCxP register is set. To
enable a pin to detect a falling edge, the associated bit
of the IOCxN register is set.
MOVLW
XORWF
ANDWF
A pin can be configured to detect rising and falling
edges simultaneously by setting the associated bits in
both of the IOCxP and IOCxN registers.
13.5
CLEARING INTERRUPT
FLAGS
(PORTA EXAMPLE)
0xff
IOCAF, W
IOCAF, F
Operation in Sleep
The interrupt-on-change interrupt sequence will wake
the device from Sleep mode, if the IOCIE bit is set.
If an edge is detected while in Sleep mode, the affected
IOCxF register will be updated prior to the first instruction
executed out of Sleep.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 135
PIC16(L)F1703/7
FIGURE 13-1:
INTERRUPT-ON-CHANGE BLOCK DIAGRAM (PORTA EXAMPLE)
IOCANx
D
Q
R
Q4Q1
edge
detect
RAx
IOCAPx
D
data bus =
0 or 1
Q
write IOCAFx
R
D
S
to data bus
IOCAFx
Q
R
IOCIE
Q2
IOC interrupt
to CPU core
from all other
IOCnFx individual
pin detectors
FOSC
Q1
Q1
Q3
Q2
Q3
Q4
Q4Q1
Q1
Q2
Q2
Q3
Q4
Q4Q1
DS40001722C-page 136
Q4
Q4Q1
Q4Q1
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
13.6
Register Definitions: Interrupt-on-Change Control
REGISTER 13-1:
IOCAP: INTERRUPT-ON-CHANGE PORTA POSITIVE EDGE REGISTER
U-0
U-0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
—
—
IOCAP5
IOCAP4
IOCAP3
IOCAP2
IOCAP1
IOCAP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
IOCAP<5:0>: Interrupt-on-Change PORTA Positive Edge Enable bits
1 = Interrupt-on-Change enabled on the pin for a positive going edge. IOCAFx bit and IOCIF flag will be set
upon detecting an edge.
0 = Interrupt-on-Change disabled for the associated pin.
REGISTER 13-2:
IOCAN: INTERRUPT-ON-CHANGE PORTA NEGATIVE EDGE REGISTER
U-0
U-0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
—
—
IOCAN5
IOCAN4
IOCAN3
IOCAN2
IOCAN1
IOCAN0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
IOCAN<5:0>: Interrupt-on-Change PORTA Negative Edge Enable bits
1 = Interrupt-on-Change enabled on the pin for a negative going edge. IOCAFx bit and IOCIF flag will be set
upon detecting an edge.
0 = Interrupt-on-Change disabled for the associated pin.
REGISTER 13-3:
IOCAF: INTERRUPT-ON-CHANGE PORTA FLAG REGISTER
U-0
U-0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
—
—
IOCAF5
IOCAF4
IOCAF3
IOCAF2
IOCAF1
IOCAF0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
u = Bit is unchanged
x = Bit is unknown
U = Unimplemented bit, read as ‘0’
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
HS - Bit is set in hardware
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
IOCAF<5:0>: Interrupt-on-Change PORTA Flag bits
1 = An enabled change was detected on the associated pin.
Set when IOCAPx = 1 and a rising edge was detected on RAx, or when IOCANx = 1 and a falling edge was
detected on RAx.
0 = No change was detected, or the user cleared the detected change.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
IOCBP: INTERRUPT-ON-CHANGE PORTB POSITIVE EDGE REGISTER(1)
REGISTER 13-4:
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
U-0
U-0
U-0
U-0
IOCBP7
IOCBP6
IOCBP5
IOCBP4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
IOCBP<7:4>: Interrupt-on-Change PORTB Positive Edge Enable bits
1 = Interrupt-on-Change enabled on the pin for a positive going edge. IOCBFx bit and IOCIF flag will be set upon
detecting an edge.
0 = Interrupt-on-Change disabled for the associated pin.
bit 3-0
Unimplemented: Read as ‘0’
Note
1:
PIC16(L)F1707 only.
IOCBN: INTERRUPT-ON-CHANGE PORTB NEGATIVE EDGE REGISTER(1)
REGISTER 13-5:
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
U-0
U-0
U-0
U-0
IOCBN7
IOCBN6
IOCBN5
IOCBN4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
IOCBN<7:4>: Interrupt-on-Change PORTB Negative Edge Enable bits
1 = Interrupt-on-Change enabled on the pin for a negative going edge. IOCBFx bit and IOCIF flag will be set upon
detecting an edge.
0 = Interrupt-on-Change disabled for the associated pin.
bit 3-0
Note
Unimplemented: Read as ‘0’
1:
PIC16(L)F1707 only.
IOCBF: INTERRUPT-ON-CHANGE PORTB FLAG REGISTER(1)
REGISTER 13-6:
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
U-0
U-0
U-0
U-0
IOCBF7
IOCBF6
IOCBF5
IOCBF4
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
HS - Bit is set in hardware
bit 7-4
IOCBF<7:4>: Interrupt-on-Change PORTB Flag bits
1 = An enabled change was detected on the associated pin.
Set when IOCBPx = 1 and a rising edge was detected on RBx, or when IOCBNx = 1 and a falling edge was
detected on RBx.
0 = No change was detected, or the user cleared the detected change.
bit 3-0
Unimplemented: Read as ‘0’
Note
1:
PIC16(L)F1707 only.
DS40001722C-page 138
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
REGISTER 13-7:
IOCCP: INTERRUPT-ON-CHANGE PORTC POSITIVE EDGE REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
IOCCP7(1)
IOCCP6(1)
IOCCP5
IOCCP4
IOCCP3
IOCCP2
IOCCP1
IOCCP0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
IOCCP<7:0>: Interrupt-on-Change PORTC Positive Edge Enable bits
1 = Interrupt-on-Change enabled on the pin for a positive going edge. IOCCFx bit and IOCIF flag will be set
upon detecting an edge.
0 = Interrupt-on-Change disabled for the associated pin.
PIC16(L)F1707 only.
Note 1:
REGISTER 13-8:
IOCCN: INTERRUPT-ON-CHANGE PORTC NEGATIVE EDGE REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
IOCCN7(1)
IOCCN6(1)
IOCCN5
IOCCN4
IOCCN3
IOCCN2
IOCCN1
IOCCN0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
IOCCN<7:0>: Interrupt-on-Change PORTC Negative Edge Enable bits
1 = Interrupt-on-Change enabled on the pin for a negative going edge. IOCCFx bit and IOCIF flag will be set upon
detecting an edge.
0 = Interrupt-on-Change disabled for the associated pin.
bit 7-0
PIC16(L)F1707 only.
Note 1:
REGISTER 13-9:
R/W/HS-0/0
(1)
IOCCF7
IOCCF: INTERRUPT-ON-CHANGE PORTC FLAG REGISTER
R/W/HS-0/0
(1)
IOCCF6
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
R/W/HS-0/0
IOCCF5
IOCCF4
IOCCF3
IOCCF2
IOCCF1
IOCCF0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
HS - Bit is set in hardware
bit 7-0
Note 1:
U = Unimplemented bit, read as ‘0’
IOCCF<7:0>: Interrupt-on-Change PORTC Flag bits
1 = An enabled change was detected on the associated pin.
Set when IOCCPx = 1 and a rising edge was detected on RCx, or when IOCCNx = 1 and a falling edge was
detected on RCx.
0 = No change was detected, or the user cleared the detected change.
PIC16(L)F1707 only.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 139
PIC16(L)F1703/7
TABLE 13-1:
Name
ANSELA
(1)
ANSELB
SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPT-ON-CHANGE
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
114
ANSB4
—
—
—
—
120
125
—
—
(1)
ANSB5
(1)
ANSC3
ANSC2
ANSC1
ANSC0
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
IOCAF
—
—
IOCAF5
IOCAF4
IOCAF3
IOCAF2
IOCAF1
IOCAF0
137
IOCAN
—
—
IOCAN5
IOCAN4
IOCAN3
IOCAN2
IOCAN1
IOCAN0
137
ANSC7
ANSC5
(2)
GIE
ANSELC
INTCON
ANSC6
(2)
ANSC4
—
—
IOCAP5
IOCAP4
IOCAP3
IOCAP2
IOCAP1
IOCAP0
137
IOCBF(1)
IOCBF7
IOCBF6
IOCBF5
IOCBF4
—
—
—
—
138
IOCBN(1)
IOCBN7
IOCBN6
IOCBN5
IOCBN4
—
—
—
—
138
(1)
IOCBP7
IOCBP6
IOCBP5
IOCBP4
—
—
—
—
138
IOCAP
IOCBP
IOCCF
IOCCF7
IOCCF6(1)
IOCCF5
IOCCF4
IOCCF3
IOCCF2
IOCCF1
IOCCF0
139
IOCCN
IOCCN7(1) IOCCN6(1)
IOCCN5
IOCCN4
IOCCN3
IOCCN2
IOCCN1
IOCCN0
139
IOCCP
IOCCP7(1) IOCCP6(1)
IOCCP5
IOCCP4
IOCCP3
IOCCP2
IOCCP1
IOCCP0
139
TRISA2
TRISA1
TRISA0
113
TRISA
(1)
TRISB
TRISC
Legend:
Note 1:
2:
3:
(1)
—
TRISB7
TRISC7
(1)
—
TRISA5
TRISA4
—(3)
TRISB6
TRISB5
TRISB4
—
—
—
—
119
TRISC6(1)
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
124
— = unimplemented location, read as ‘0’. Shaded cells are not used by interrupt-on-change.
PIC16(L)F1707 only.
PIC16(L)F1703 only.
Unimplemented, read as ‘1’.
DS40001722C-page 140
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
14.0
FIXED VOLTAGE REFERENCE
(FVR)
The Fixed Voltage Reference, or FVR, is a stable
voltage reference, independent of VDD, with 1.024V,
2.048V or 4.096V selectable output levels. The output
of the FVR can be configured to supply a reference
voltage to the following:
• ADC input channel
• ADC positive reference
Independent Gain Amplifiers
The output of the FVR supplied to the ADC is routed
through two independent programmable gain
amplifiers. Each amplifier can be programmed for a
gain of 1x, 2x or 4x, to produce the three possible
voltage levels.
FIGURE 14-1:
The CDAFVR<1:0> bits of the FVRCON register are
used to enable and configure the gain amplifier settings
supplied to the Op Amp.
14.2
The FVR can be enabled by setting the FVREN bit of
the FVRCON register.
14.1
The ADFVR<1:0> bits of the FVRCON register are
used to enable and configure the gain amplifier settings
for the reference supplied to the ADC module.
Reference Section 16.0 “Analog-to-Digital Converter (ADC) Module” for additional information.
FVR Stabilization Period
When the Fixed Voltage Reference module is enabled, it
requires time for the reference and amplifier circuits to
stabilize. Once the circuits stabilize and are ready for use,
the FVRRDY bit of the FVRCON register will be set. See
Figure 27-62.
VOLTAGE REFERENCE BLOCK DIAGRAM
ADFVR<1:0>
2
X1
X2
X4
FVR_buffer1
(To ADC Module)
X1
X2
X3
FVR_buffer2
(To Op Amp Module)
HFINTOSC Enable
HFINTOSC
To BOR, LDO
FVREN
+
_
FVRRDY
Any peripheral requiring the
Fixed Reference
(See Table 14-1)
TABLE 14-1:
Peripheral
HFINTOSC
PERIPHERALS REQUIRING THE FIXED VOLTAGE REFERENCE (FVR)
Conditions
Description
FOSC<1:0> = 00 and
IRCF<3:0>  000x
INTOSC is active and device is not in Sleep
BOREN<1:0> = 11
BOR always enabled
BOR
BOREN<1:0> = 10 and BORFS = 1
BOR disabled in Sleep mode, BOR Fast Start enabled
BOREN<1:0> = 01 and BORFS = 1
BOR under software control, BOR Fast Start enabled
LDO
All PIC16F1703/7 devices, when
VREGPM = 1 and not in Sleep
The device runs off of the ULP regulator when in Sleep mode
 2013-2015 Microchip Technology Inc.
D40001722C-page 141
PIC16(L)F1703/7
14.3
Register Definitions: FVR Control
REGISTER 14-1:
FVRCON: FIXED VOLTAGE REFERENCE CONTROL REGISTER
R/W-0/0
R-q/q
FVREN
FVRRDY(1)
R/W-0/0
TSEN
(3)
R/W-0/0
TSRNG
R/W-0/0
(3)
R/W-0/0
R/W-0/0
CDAFVR<1:0>
R/W-0/0
ADFVR<1:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = Value depends on condition
bit 7
FVREN: Fixed Voltage Reference Enable bit
1 = Fixed Voltage Reference is enabled
0 = Fixed Voltage Reference is disabled
bit 6
FVRRDY: Fixed Voltage Reference Ready Flag bit(1)
1 = Fixed Voltage Reference output is ready for use
0 = Fixed Voltage Reference output is not ready or not enabled
bit 5
TSEN: Temperature Indicator Enable bit(3)
1 = Temperature Indicator is enabled
0 = Temperature Indicator is disabled
bit 4
TSRNG: Temperature Indicator Range Selection bit(3)
1 = VOUT = VDD - 4VT (High Range)
0 = VOUT = VDD - 2VT (Low Range)
bit 3-2
CDAFVR<1:0>: Op Amp Fixed Voltage Reference Selection bit
11 = Op Amp Fixed Voltage Reference Peripheral output is 4x (4.096V)(2)
10 = Op Amp Fixed Voltage Reference Peripheral output is 2x (2.048V)(2)
01 = Op Amp Fixed Voltage Reference Peripheral output is 1x (1.024V)
00 = Op Amp Fixed Voltage Reference Peripheral is off.
bit 1-0
ADFVR<1:0>: ADC FVR Buffer Gain Selection bit
11 = ADC FVR Buffer Gain is 4x, with output VADFVR = 4x VFVR(2)
10 = ADC FVR Buffer Gain is 2x, with output VADFVR = 2x VFVR(2)
01 = ADC FVR Buffer Gain is 1x, with output VADFVR = 1x VFVR
00 = ADC FVR Buffer is off
Note 1:
2:
3:
FVRRDY is always ‘1’ on PIC16F1703/7 only.
Fixed Voltage Reference output cannot exceed VDD.
See Section 15.0 “Temperature Indicator Module” for additional information.
TABLE 14-2:
Name
FVRCON
Legend:
SUMMARY OF REGISTERS ASSOCIATED WITH FIXED VOLTAGE REFERENCE
Bit 7
Bit 6
Bit 5
Bit 4
FVREN
FVRRDY
TSEN
TSRNG
Bit 3
Bit 2
CDAFVR<1:0>
Bit 1
Bit 0
ADFVR<1:0>
Register
on page
142
Shaded cells are not used with the Fixed Voltage Reference.
D40001722C-page 142
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
15.0
TEMPERATURE INDICATOR
MODULE
FIGURE 15-1:
This family of devices is equipped with a temperature
circuit designed to measure the operating temperature
of the silicon die. The circuit’s range of operating
temperature falls between -40°C and +85°C. The
output is a voltage that is proportional to the device
temperature. The output of the temperature indicator is
internally connected to the device ADC.
VDD
TSEN
TSRNG
The circuit may be used as a temperature threshold
detector or a more accurate temperature indicator,
depending on the level of calibration performed. A onepoint calibration allows the circuit to indicate a
temperature closely surrounding that point. A two-point
calibration allows the circuit to sense the entire range
of temperature more accurately. Reference Application
Note AN1333, “Use and Calibration of the Internal
Temperature Indicator” (DS01333) for more details
regarding the calibration process.
15.1
Circuit Operation
Figure 15-1 shows a simplified block diagram of the
temperature circuit. The proportional voltage output is
achieved by measuring the forward voltage drop across
multiple silicon junctions.
Equation 15-1 describes the output characteristics of
the temperature indicator.
EQUATION 15-1:
VOUT RANGES
TEMPERATURE CIRCUIT
DIAGRAM
VOUT
Temp. Indicator
15.2
To ADC
Minimum Operating VDD
When the temperature circuit is operated in low range,
the device may be operated at any operating voltage
that is within specifications.
When the temperature circuit is operated in high range,
the device operating voltage, VDD, must be high
enough to ensure that the temperature circuit is
correctly biased.
Table 15-1 shows the recommended minimum VDD vs.
range setting.
High Range: VOUT = VDD - 4VT
TABLE 15-1:
Low Range: VOUT = VDD - 2VT
The temperature sense circuit is integrated with the
Fixed Voltage Reference (FVR) module. See
Section 14.0 “Fixed Voltage Reference (FVR)” for
more information.
The circuit is enabled by setting the TSEN bit of the
FVRCON register. When disabled, the circuit draws no
current.
The circuit operates in either high or low range. The high
range, selected by setting the TSRNG bit of the
FVRCON register, provides a wider output voltage. This
provides more resolution over the temperature range,
but may be less consistent from part to part. This range
requires a higher bias voltage to operate and thus, a
higher VDD is needed.
RECOMMENDED VDD VS.
RANGE
Min. VDD, TSRNG = 1
Min. VDD, TSRNG = 0
3.6V
1.8V
15.3
Temperature Output
The output of the circuit is measured using the internal
Analog-to-Digital Converter. A channel is reserved for
the temperature circuit output. Refer to Section 16.0
“Analog-to-Digital Converter (ADC) Module” for
detailed information.
The low range is selected by clearing the TSRNG bit of
the FVRCON register. The low range generates a lower
voltage drop and thus, a lower bias voltage is needed to
operate the circuit. The low range is provided for low
voltage operation.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 143
PIC16(L)F1703/7
15.4
ADC Acquisition Time
To ensure accurate temperature measurements, the
user must wait at least 200 s after the ADC input
multiplexer is connected to the temperature indicator
output before the conversion is performed. In addition,
the user must wait 200 s between sequential
conversions of the temperature indicator output.
TABLE 15-2:
Name
FVRCON
Legend:
SUMMARY OF REGISTERS ASSOCIATED WITH THE TEMPERATURE INDICATOR
Bit 7
Bit 6
Bit 5
Bit 4
FVREN
FVRRDY
TSEN
TSRNG
Bit 3
Bit 2
CDAFVR<1:0>
Bit 1
Bit 0
ADFVR<1:0>
Register
on page
142
Shaded cells are unused by the temperature indicator module.
DS40001722C-page 144
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
16.0
The ADC can generate an interrupt upon completion of
a conversion. This interrupt can be used to wake-up the
device from Sleep.
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
The Analog-to-Digital Converter (ADC) allows
conversion of an analog input signal to a 10-bit binary
representation of that signal. This device uses analog
inputs, which are multiplexed into a single sample and
hold circuit. The output of the sample and hold is
connected to the input of the converter. The converter
generates a 10-bit binary result via successive
approximation and stores the conversion result into the
ADC result registers (ADRESH:ADRESL register pair).
Figure 16-1 shows the block diagram of the ADC.
The ADC voltage reference is software selectable to be
either internally generated or externally supplied.
FIGURE 16-1:
ADC BLOCK DIAGRAM
VDD
ADPREF = 11
ADPREF = 00
VREF+
FVR_Buffer1
ADPREF = 10
VREF- = VSS
AN0
00000
VREF+/AN1
00001
AN2
00010
AN3
00011
AN4
00100
AN5
00101
AN6
00110
AN7
00111
Ref+ Ref-
AN8
01000
ADC
AN9
01001
AN10
01010
AN11
01011
10
GO/DONE
ADFM
0 = Left Justify
1 = Right Justify
16
ADON
Temp Indicator
11101
FVR_Buffer1
11111
VSS
ADRESH
ADRESL
CHS<4:0>
Note 1:
When ADON = 0, all multiplexer inputs are disconnected.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 145
PIC16(L)F1703/7
16.1
ADC Configuration
When configuring and using the ADC the following
functions must be considered:
•
•
•
•
•
•
Port configuration
Channel selection
ADC voltage reference selection
ADC conversion clock source
Interrupt control
Result formatting
16.1.1
PORT CONFIGURATION
The ADC can be used to convert both analog and
digital signals. When converting analog signals, the I/O
pin should be configured for analog by setting the
associated TRIS and ANSEL bits. Refer to
Section 11.0 “I/O Ports” for more information.
Note:
16.1.2
Analog voltages on any pin that is defined
as a digital input may cause the input buffer to conduct excess current.
CHANNEL SELECTION
There are up to 17 channel selections available:
•
•
•
•
16.1.4
CONVERSION CLOCK
The source of the conversion clock is software selectable via the ADCS bits of the ADCON1 register. There
are seven possible clock options:
•
•
•
•
•
•
•
FOSC/2
FOSC/4
FOSC/8
FOSC/16
FOSC/32
FOSC/64
FRC (internal RC oscillator)
The time to complete one bit conversion is defined as
TAD. One full 10-bit conversion requires 11.5 TAD periods as shown in Figure 16-2.
For correct conversion, the appropriate TAD specification
must be met. Refer to Table 26-15 for more information.
Table 16-1 gives examples of appropriate ADC clock
selections.
Note:
Unless using the FRC, any changes in the
system clock frequency will change the
ADC clock frequency, which may
adversely affect the ADC result.
AN<13:8, 4:0> pins (PIC16(L)F1703 only)
AN<21,13:0> pins (PIC16(L)F1707 only)
Temperature Indicator
FVR_buffer1
The CHS bits of the ADCON0 register (Register 16-1)
determine which channel is connected to the sample
and hold circuit.
When changing channels, a delay is required before
starting the next conversion. Refer to Section 16.2
“ADC Operation” for more information.
16.1.3
ADC VOLTAGE REFERENCE
The ADPREF bits of the ADCON1 register provides
control of the positive voltage reference. The positive
voltage reference can be:
•
•
•
•
•
VREF+ pin
VDD
FVR 2.048V
FVR 4.096V (Not available on LF devices)
VSS
See Section 16.0 “Analog-to-Digital Converter
(ADC) Module” for more details on the Fixed Voltage
Reference.
DS40001722C-page 146
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 16-1:
ADC CLOCK PERIOD (TAD) VS. DEVICE OPERATING FREQUENCIES
ADC Clock Period (TAD)
Device Frequency (FOSC)
ADC
Clock Source
ADCS<2:0>
32 MHz
20 MHz
16 MHz
8 MHz
4 MHz
1 MHz
FOSC/2
000
62.5ns(2)
100 ns(2)
125 ns(2)
250 ns(2)
500 ns(2)
2.0 s
FOSC/4
100
125 ns
(2)
(2)
(2)
(2)
FOSC/8
001
0.5 s(2)
400 ns(2)
0.5 s(2)
FOSC/16
101
800 ns
800 ns
010
1.0 s
FOSC/64
110
FRC
x11
FOSC/32
Legend:
Note 1:
2:
3:
4:
1.0 s
4.0 s
1.0 s
2.0 s
8.0 s(3)
1.0 s
2.0 s
4.0 s
16.0 s(3)
1.6 s
2.0 s
4.0 s
2.0 s
3.2 s
4.0 s
1.0-6.0 s(1,4)
1.0-6.0 s(1,4)
1.0-6.0 s(1,4)
200 ns
250 ns
500 ns
8.0 s
32.0 s(2)
(3)
8.0 s
16.0 s
(3)
64.0 s(2)
(2)
1.0-6.0 s(1,4)
1.0-6.0 s(1,4)
1.0-6.0 s(1,4)
Shaded cells are outside of recommended range.
See TAD parameter for FRC source typical TAD value.
These values violate the required TAD time.
Outside the recommended TAD time.
The ADC clock period (TAD) and total ADC conversion time can be minimized when the ADC clock is derived from the
system clock FOSC. However, the FRC oscillator source must be used when conversions are to be performed with the
device in Sleep mode.
FIGURE 16-2:
ANALOG-TO-DIGITAL CONVERSION TAD CYCLES
TAD1
TAD2
TAD3
TAD4
TAD5
TAD6
TAD7
TAD8
TAD9
TAD10
TAD11
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
THCD
Conversion Starts
TACQ
Holding capacitor disconnected
from analog input (THCD).
Set GO bit
On the following cycle:
ADRESH:ADRESL is loaded,
GO bit is cleared,
ADIF bit is set,
holding capacitor is reconnected to analog input.
Enable ADC (ADON bit)
and
Select channel (ACS bits)
 2013-2015 Microchip Technology Inc.
DS40001722C-page 147
PIC16(L)F1703/7
16.1.5
INTERRUPTS
16.1.6
The ADC module allows for the ability to generate an
interrupt upon completion of an Analog-to-Digital
conversion. The ADC Interrupt Flag is the ADIF bit in
the PIR1 register. The ADC Interrupt Enable is the
ADIE bit in the PIE1 register. The ADIF bit must be
cleared in software.
RESULT FORMATTING
The 10-bit ADC conversion result can be supplied in
two formats, left justified or right justified. The ADFM bit
of the ADCON1 register controls the output format.
Figure 16-3 shows the two output formats.
Note 1: The ADIF bit is set at the completion of
every conversion, regardless of whether
or not the ADC interrupt is enabled.
2: The ADC operates during Sleep only
when the FRC oscillator is selected.
This interrupt can be generated while the device is
operating or while in Sleep. If the device is in Sleep, the
interrupt will wake-up the device. Upon waking from
Sleep, the next instruction following the SLEEP
instruction is always executed. If the user is attempting
to wake-up from Sleep and resume in-line code
execution, the ADIE bit of the PIE1 register and the
PEIE bit of the INTCON register must both be set and
the GIE bit of the INTCON register must be cleared. If
all three of these bits are set, the execution will switch
to the Interrupt Service Routine.
FIGURE 16-3:
10-BIT ADC CONVERSION RESULT FORMAT
ADRESH
(ADFM = 0)
ADRESL
MSB
LSB
bit 7
bit 0
bit 7
10-bit ADC Result
(ADFM = 1)
Unimplemented: Read as ‘0’
MSB
bit 7
Unimplemented: Read as ‘0’
DS40001722C-page 148
bit 0
LSB
bit 0
bit 7
bit 0
10-bit ADC Result
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
16.2
16.2.1
ADC Operation
STARTING A CONVERSION
To enable the ADC module, the ADON bit of the
ADCON0 register must be set to a ‘1’. Setting the
GO/DONE bit of the ADCON0 register to a ‘1’ will start
the Analog-to-Digital conversion.
Note:
16.2.2
The GO/DONE bit should not be set in the
same instruction that turns on the ADC.
Refer to Section 16.2.6 “ADC Conversion Procedure”.
COMPLETION OF A CONVERSION
When the conversion is complete, the ADC module will:
• Clear the GO/DONE bit
• Set the ADIF Interrupt Flag bit
• Update the ADRESH and ADRESL registers with
new conversion result
16.2.3
TERMINATING A CONVERSION
If a conversion must be terminated before completion,
the GO/DONE bit can be cleared in software. The
ADRESH and ADRESL registers will be updated with
the partially complete Analog-to-Digital conversion
sample. Incomplete bits will match the last bit
converted.
Note:
A device Reset forces all registers to their
Reset state. Thus, the ADC module is
turned off and any pending conversion is
terminated.
16.2.4
ADC OPERATION DURING SLEEP
The ADC module can operate during Sleep. This
requires the ADC clock source to be set to the FRC
option. When the FRC oscillator source is selected, the
ADC waits one additional instruction before starting the
conversion. This allows the SLEEP instruction to be
executed, which can reduce system noise during the
conversion. If the ADC interrupt is enabled, the device
will wake-up from Sleep when the conversion
completes. If the ADC interrupt is disabled, the ADC
module is turned off after the conversion completes,
although the ADON bit remains set.
When the ADC clock source is something other than
FRC, a SLEEP instruction causes the present conversion to be aborted and the ADC module is turned off,
although the ADON bit remains set.
16.2.5
AUTO-CONVERSION TRIGGER
The Auto-conversion Trigger allows periodic ADC measurements without software intervention. When a rising
edge of the selected source occurs, the GO/DONE bit
is set by hardware.
The Auto-conversion Trigger source is selected with
the TRIGSEL<3:0> bits of the ADCON2 register.
Using the Auto-conversion Trigger does not assure
proper ADC timing. It is the user’s responsibility to
ensure that the ADC timing requirements are met.
See Table 16-2 for auto-conversion sources.
TABLE 16-2:
AUTO-CONVERSION
SOURCES
Source Peripheral
Signal Name
CCP1
CCP2
 2013-2015 Microchip Technology Inc.
Timer0
T0_overflow
Timer1
T1_overflow
Timer2
T2_match
DS40001722C-page 149
PIC16(L)F1703/7
16.2.6
ADC CONVERSION PROCEDURE
This is an example procedure for using the ADC to
perform an Analog-to-Digital conversion:
1.
2.
3.
4.
5.
6.
7.
8.
Configure Port:
• Disable pin output driver (Refer to the TRIS
register)
• Configure pin as analog (Refer to the ANSEL
register)
Configure the ADC module:
• Select ADC conversion clock
• Configure voltage reference
• Select ADC input channel
• Turn on ADC module
Configure ADC interrupt (optional):
• Clear ADC interrupt flag
• Enable ADC interrupt
• Enable peripheral interrupt
• Enable global interrupt(1)
Wait the required acquisition time(2).
Start conversion by setting the GO/DONE bit.
Wait for ADC conversion to complete by one of
the following:
• Polling the GO/DONE bit
• Waiting for the ADC interrupt (interrupts
enabled)
Read ADC Result.
Clear the ADC interrupt flag (required if interrupt
is enabled).
EXAMPLE 16-1:
ADC CONVERSION
;This code block configures the ADC
;for polling, Vdd and Vss references, FRC
;oscillator and AN0 input.
;
;Conversion start & polling for completion
; are included.
;
BANKSEL
ADCON1
;
MOVLW
B’11110000’ ;Right justify, FRC
;oscillator
MOVWF
ADCON1
;Vdd and Vss Vref
BANKSEL
TRISA
;
BSF
TRISA,0
;Set RA0 to input
BANKSEL
ANSEL
;
BSF
ANSEL,0
;Set RA0 to analog
BANKSEL
ADCON0
;
MOVLW
B’00000001’ ;Select channel AN0
MOVWF
ADCON0
;Turn ADC On
CALL
SampleTime
;Acquisiton delay
BSF
ADCON0,ADGO ;Start conversion
BTFSC
ADCON0,ADGO ;Is conversion done?
GOTO
$-1
;No, test again
BANKSEL
ADRESH
;
MOVF
ADRESH,W
;Read upper 2 bits
MOVWF
RESULTHI
;store in GPR space
BANKSEL
ADRESL
;
MOVF
ADRESL,W
;Read lower 8 bits
MOVWF
RESULTLO
;Store in GPR space
Note 1: The global interrupt can be disabled if the
user is attempting to wake-up from Sleep
and resume in-line code execution.
2: Refer to Section 16.4 “ADC Acquisition Requirements”.
DS40001722C-page 150
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16.3
Register Definitions: ADC Control
REGISTER 16-1:
U-0
ADCON0: ADC CONTROL REGISTER 0
R/W-0/0
R/W-0/0
—
R/W-0/0
R/W-0/0
R/W-0/0
CHS<4:0>
R/W-0/0
R/W-0/0
GO/DONE
ADON
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
Unimplemented: Read as ‘0’
bit 6-2
CHS<4:0>: Analog Channel Select bits
11111 = FVR (Fixed Voltage Reference) Buffer 1 Output(1)
11110 = Reserved
11101 = Temperature Indicator(2)
11100 = Reserved. No channel connected.
•
•
•
01100 = Reserved. No channel connected.
01011 = AN11
01010 = AN10
01001 = AN9
01000 = AN8
00111 = AN7
00110 = AN6
00101 = AN5
00100 = AN4
00011 = AN3
00010 = AN2
00001 = AN1
00000 = AN0
bit 1
GO/DONE: ADC Conversion Status bit
1 = ADC conversion cycle in progress. Setting this bit starts an ADC conversion cycle.
This bit is automatically cleared by hardware when the ADC conversion has completed.
0 = ADC conversion completed/not in progress
bit 0
ADON: ADC Enable bit
1 = ADC is enabled
0 = ADC is disabled and consumes no operating current
Note 1:
2:
See Section 14.0 “Fixed Voltage Reference (FVR)” for more information.
See Section 15.0 “Temperature Indicator Module” for more information.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
REGISTER 16-2:
R/W-0/0
ADCON1: ADC CONTROL REGISTER 1
R/W-0/0
ADFM
R/W-0/0
R/W-0/0
ADCS<2:0>
U-0
R/W-0/0
—
ADNREF
R/W-0/0
bit 7
R/W-0/0
ADPREF<1:0>
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
ADFM: ADC Result Format Select bit
1 = Right justified. Six Most Significant bits of ADRESH are set to ‘0’ when the conversion result is
loaded.
0 = Left justified. Six Least Significant bits of ADRESL are set to ‘0’ when the conversion result is
loaded.
bit 6-4
ADCS<2:0>: ADC Conversion Clock Select bits
111 = FRC (clock supplied from an internal RC oscillator)
110 = FOSC/64
101 = FOSC/16
100 = FOSC/4
011 = FRC (clock supplied from an internal RC oscillator)
010 = FOSC/32
001 = FOSC/8
000 = FOSC/2
bit 3
Unimplemented: Read as ‘0’
bit 2
ADNREF: ADC Negative Voltage Reference Configuration bit
0 = VREF- is connected to VSS
1 = VREF- is connected to VREF- pin
bit 1-0
ADPREF<1:0>: ADC Positive Voltage Reference Configuration bits
11 = VREF+ is connected to internal FVR_Buffer1(1)
10 = VREF+ is connected to external VREF+ pin(1)
01 = Reserved
00 = VREF+ is connected to VDD
Note 1:
When selecting the VREF+ pin as the source of the positive reference, be aware that a minimum voltage
specification exists. See Table 26-15 for details.
DS40001722C-page 152
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REGISTER 16-3:
R/W-0/0
ADCON2: ADC CONTROL REGISTER 2
R/W-0/0
R/W-0/0
TRIGSEL<3:0>
R/W-0/0
(1)
U-0
U-0
U-0
U-0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
bit 3-0
Note 1:
2:
TRIGSEL<3:0>: Auto-Conversion Trigger Selection bits(1)
0000 = No auto-conversion trigger selected
0001 = CCP1
0010 = CCP2
0011 = Timer0 – T0_overflow(2)
0100 = Timer1 – T1_overflow(2)
0101 = Timer2 – T2_match
0110 = Reserved
0111 = Reserved
1000 = Reserved
1001 = Reserved
1010 = Reserved
1011 = Reserved
1100 = Reserved
1101 = Reserved
1110 = Reserved
1111 = Reserved
Unimplemented: Read as ‘0’
This is a rising edge sensitive input for all sources.
Signal also sets its corresponding interrupt flag.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 153
PIC16(L)F1703/7
REGISTER 16-4:
R/W-x/u
ADRESH: ADC RESULT REGISTER HIGH (ADRESH) ADFM = 0
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
ADRES<9:2>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
ADRES<9:2>: ADC Result Register bits
Upper eight bits of 10-bit conversion result
REGISTER 16-5:
R/W-x/u
ADRESL: ADC RESULT REGISTER LOW (ADRESL) ADFM = 0
R/W-x/u
ADRES<1:0>
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
—
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
ADRES<1:0>: ADC Result Register bits
Lower two bits of 10-bit conversion result
bit 5-0
Reserved: Do not use.
DS40001722C-page 154
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PIC16(L)F1703/7
REGISTER 16-6:
ADRESH: ADC RESULT REGISTER HIGH (ADRESH) ADFM = 1
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
—
—
—
—
—
—
R/W-x/u
R/W-x/u
ADRES<9:8>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-2
Reserved: Do not use.
bit 1-0
ADRES<9:8>: ADC Result Register bits
Upper two bits of 10-bit conversion result
REGISTER 16-7:
R/W-x/u
ADRESL: ADC RESULT REGISTER LOW (ADRESL) ADFM = 1
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
R/W-x/u
ADRES<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
ADRES<7:0>: ADC Result Register bits
Lower eight bits of 10-bit conversion result
 2013-2015 Microchip Technology Inc.
DS40001722C-page 155
PIC16(L)F1703/7
16.4
ADC Acquisition Requirements
For the ADC to meet its specified accuracy, the charge
holding capacitor (CHOLD) must be allowed to fully
charge to the input channel voltage level. The Analog
Input model is shown in Figure 16-4. The source
impedance (RS) and the internal sampling switch (RSS)
impedance directly affect the time required to charge
the capacitor CHOLD. The sampling switch (RSS)
impedance varies over the device voltage (VDD), refer
to Figure 16-4. The maximum recommended
impedance for analog sources is 10 k. As the
EQUATION 16-1:
Assumptions:
source impedance is decreased, the acquisition time
may be decreased. After the analog input channel is
selected (or changed), an ADC acquisition must be
done before the conversion can be started. To calculate
the minimum acquisition time, Equation 16-1 may be
used. This equation assumes that 1/2 LSb error is used
(1,024 steps for the ADC). The 1/2 LSb error is the
maximum error allowed for the ADC to meet its
specified resolution.
ACQUISITION TIME EXAMPLE
Temperature = 50°C and external impedance of 10k  5.0V V DD
T ACQ = Amplifier Settling Time + Hold Capacitor Charging Time + Temperature Coefficient
= T AMP + T C + T COFF
= 2µs + T C +   Temperature - 25°C   0.05µs/°C  
The value for TC can be approximated with the following equations:
1
 = V CHOLD
V AP P LI ED  1 – -------------------------n+1


2
–1
;[1] VCHOLD charged to within 1/2 lsb
–TC
----------

RC
V AP P LI ED  1 – e  = V CHOLD


;[2] VCHOLD charge response to VAPPLIED
– Tc
---------

1
RC
 ;combining [1] and [2]
V AP P LI ED  1 – e  = V A PP LIE D  1 – -------------------------n+1



2
–1
Note: Where n = number of bits of the ADC.
Solving for TC:
T C = – C HOLD  R IC + R SS + R S  ln(1/2047)
= – 10pF  1k  + 7k  + 10k   ln(0.0004885)
= 1.37 µs
Therefore:
T A CQ = 2µs + 892ns +   50°C- 25°C   0.05 µs/°C  
= 4.62µs
Note 1: The reference voltage (VREF) has no effect on the equation, since it cancels itself out.
2: The charge holding capacitor (CHOLD) is not discharged after each conversion.
3: The maximum recommended impedance for analog sources is 10 k. This is required to meet the pin
leakage specification.
DS40001722C-page 156
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PIC16(L)F1703/7
FIGURE 16-4:
ANALOG INPUT MODEL
VDD
Analog
Input
pin
Rs
VT  0.6V
CPIN
5 pF
VA
RIC  1k
Sampling
Switch
SS Rss
I LEAKAGE(1)
VT  0.6V
CHOLD = 10 pF
Ref-
6V
5V
VDD 4V
3V
2V
= Sample/Hold Capacitance
= Input Capacitance
Legend: CHOLD
CPIN
RSS
I LEAKAGE = Leakage current at the pin due to
various junctions
= Interconnect Resistance
RIC
= Resistance of Sampling Switch
RSS
SS
= Sampling Switch
VT
= Threshold Voltage
Note 1:
FIGURE 16-5:
5 6 7 8 9 10 11
Sampling Switch
(k)
Refer to Table 26-4 (parameter D060).
ADC TRANSFER FUNCTION
Full-Scale Range
3FFh
3FEh
ADC Output Code
3FDh
3FCh
3FBh
03h
02h
01h
00h
Analog Input Voltage
0.5 LSB
Ref-
 2013-2015 Microchip Technology Inc.
Zero-Scale
Transition
1.5 LSB
Full-Scale
Transition
Ref+
DS40001722C-page 157
PIC16(L)F1703/7
TABLE 16-3:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH ADC
Bit 7
ADCON0
—
ADCON1
ADFM
ADCON2
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
CHS<4:0>
ADCS<2:0>
TRIGSEL<3:0>
Bit 1
Bit 0
Register
on Page
GO/DONE
ADON
151
ADNREF<1:0>
ADPREF<1:0>
152
—
—
153
—
—
ADRESH
ADRES<7:0>
154, 155
ADRESL
ADRES<7:0>
154, 155
ANSELA
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
114
—
—
ANSB5
ANSB4
—
—
—
—
120
ANSELC
ANSC7(1)
ANSC6(1)
ANSC5(2)
ANSC4(2)
ANSC3
ANSC2
ANSC1
ANSC0
125
INTCON
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
81
PIE1
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
PIR1
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
81
—
—
TRISA5
TRISA4
—(3)
TRISA2
TRISA1
TRISA0
113
TRISB7
TRISB6
TRISB5
TRISB4
—
—
—
—
119
TRISC7(1)
TRISC6(1)
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
124
ANSELB
(1)
TRISA
TRISB(1)
TRISC
Legend:
Note 1:
2:
3:
x = unknown, u = unchanged, — = unimplemented read as ‘0’, q = value depends on condition. Shaded cells are not
used for the ADC module.
PIC16(L)F1707 only.
PIC16(L)F1703 only.
Unimplemented, read as ‘1’.
DS40001722C-page 158
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PIC16(L)F1703/7
17.0
OPERATIONAL AMPLIFIER
(OPA) MODULES
The Operational Amplifier (OPA) is a standard
3-terminal device requiring external feedback to
operate. The OPA module has the following features:
• External connections to I/O ports
• Low leakage inputs
• Factory Calibrated Input Offset Voltage
FIGURE 17-1:
OPAx MODULE BLOCK DIAGRAM
OPAxIN+
0x
Reserved
10
FVR_Buffer2
11
OPAXEN
OPAXSP(1)
OPAxIN-
0
OPA
OPAXOUT
1
OPAxNCH<1:0>
Note 1:
OPAXUG
The OPAxSP bit must be set. Low-Power mode is not supported.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 159
PIC16(L)F1703/7
17.1
OPA Module Performance
Common AC and DC performance specifications for
the OPA module:
•
•
•
•
•
Common-Mode Voltage Range
Leakage Current
Input Offset Voltage
Open Loop Gain
Gain Bandwidth Product
Common-mode voltage range is the specified voltage range for the OPA+ and OPA- inputs, for which the
OPA module will perform to within its specifications.
The OPA module is designed to operate with input voltages between VSS and VDD. Behavior for
common-mode voltages greater than VDD, or below
VSS, are not guaranteed.
Leakage current is a measure of the small source or
sink currents on the OPA+ and OPA- inputs. To
minimize the effect of leakage currents, the effective
impedances connected to the OPA+ and OPA- inputs
should be kept as small as possible and equal.
Input offset voltage is a measure of the voltage
difference between the OPA+ and OPA- inputs in a
closed loop circuit with the OPA in its linear region. The
offset voltage will appear as a DC offset in the output
equal to the input offset voltage, multiplied by the gain
of the circuit. The input offset voltage is also affected by
the common-mode voltage. The OPA is factory
calibrated to minimize the input offset voltage of the
module.
17.1.1
OPA Module Control
The OPA module is enabled by setting the OPAxEN bit
of the OPAxCON register. When enabled, the OPA
forces the output driver of OPAxOUT pin into tri-state to
prevent contention between the driver and the OPA
output.
Note:
17.1.2
When the OPA module is enabled, the
OPAxOUT pin is driven by the Op Amp
output, not by the PORT digital driver.
Refer to Table 26-16 for the Op Amp output
drive capability.
UNITY GAIN MODE
The OPAxUG bit of the OPAxCON register selects the
Unity Gain mode. When unity gain is selected, the OPA
output is connected to the inverting input and the
OPAxIN pin is relinquished, releasing the pin for
general purpose input and output.
17.2
Effects of Reset
A device Reset forces all registers to their Reset state.
This disables the OPA module.
Open loop gain is the ratio of the output voltage to the
differential input voltage, (OPA+) - (OPA-). The gain is
greatest at DC and falls off with frequency.
Gain Bandwidth Product or GBWP is the frequency
at which the open loop gain falls off to 0 dB.
DS40001722C-page 160
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PIC16(L)F1703/7
17.3
Register Definitions: Op Amp Control
REGISTER 17-1:
OPAxCON: OPERATIONAL AMPLIFIERS (OPAx) CONTROL REGISTERS
R/W-0/0
R/W-0/0
U-0
R/W-0/0
U-0
U-0
OPAxEN
OPAxSP
—
OPAxUG
—
—
R/W-0/0
R/W-0/0
OPAxPCH<1:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = Value depends on condition
bit 7
OPAxEN: Op Amp Enable bit
1 = Op Amp is enabled
0 = Op Amp is disabled and consumes no active power
bit 6
OPAxSP: Op Amp Speed/Power Select bit
1 = Op Amp operates in high GBWP mode
0 = Reserved. Do not use.
bit 5
Unimplemented: Read as ‘0’
bit 4
OPAxUG: Op Amp Unity Gain Select bit
1 = OPA output is connected to inverting input. OPAxIN- pin is available for general purpose I/O.
0 = Inverting input is connected to the OPAxIN- pin
bit 3-2
Unimplemented: Read as ‘0’
bit 1-0
OPAxPCH<1:0>: Non-inverting Channel Selection bits
11 = Non-inverting input connects to FVR_Buffer2 output
10 = Reserved
0x = Non-inverting input connects to OPAxIN+ pin
TABLE 17-1:
Name
ANSELB(1)
SUMMARY OF REGISTERS ASSOCIATED WITH OP AMPS
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
—
—
ANSB5
ANSB4
—
—
—
—
120
ANSELC
ANSC7(1)
ANSC6(1)
ANSC5(2)
ANSC4(2)
ANSC3
ANSC2
ANSC1
ANSC0
125
FVRCON
FVREN
FVRRDY
TSEN
TSRNG
OPA1CON
OPA1EN
OPA1SP
—
OPA1UG
—
OPA2CON
OPA2EN
OPA2SP
—
OPA2UG
—
TRISB7
TRISB6
TRISB5
TRISB4
—
—
—
—
119
TRISC7(1)
TRISC6(1)
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
124
TRISB(1)
TRISC
Legend:
Note 1:
2:
3:
CDAFVR<1:0>
ADFVR<1:0>
142
—
OPA1PCH<1:0>
161
—
OPA2PCH<1:0>
161
— = unimplemented location, read as ‘0’. Shaded cells are not used by Op Amps.
PIC16(L)F1707 only.
PIC16(L)F1703 only.
Unimplemented, read as ‘1’.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
18.0
ZERO-CROSS DETECTION
(ZCD) MODULE
18.1
The ZCD module detects when an A/C signal crosses
through the ground potential. The actual zero crossing
threshold is the zero crossing reference voltage, VREF,
which is typically 0.75V above ground.
The connection to the signal to be detected is through
a series current limiting resistor. The module applies a
current source or sink to the ZCD pin to maintain a
constant voltage on the pin, thereby preventing the pin
voltage from forward biasing the ESD protection
diodes. When the applied voltage is greater than the
reference voltage, the module sinks current. When the
applied voltage is less than the reference voltage, the
module sources current. The current source and sink
action keeps the pin voltage constant over the full
range of the applied voltage. The ZCD module is
shown in the simplified block diagram Figure 18-2.
The ZCD module requires a current limiting resistor in
series with the external voltage source. The impedance
and rating of this resistor depends on the external
source peak voltage. Select a resistor value that will
drop all of the peak voltage when the current through
the resistor is nominally 300 A. Refer to
Equation 18-1 and Figure 18-1. Make sure that the
ZCD I/O pin internal weak pull-up is disabled so it does
not interfere with the current source and sink.
EQUATION 18-1:
FIGURE 18-1:
VMAXPEAK
VMINPEAK
VREF
SIMPLIFIED ZCD BLOCK DIAGRAM
optional
VDD
Vpullup
Rpullup
External current
limiting resistor
Vref
EXTERNAL VOLTAGE
VPEAK
A/C period measurement
Accurate long term time measurement
Dimmer phase delayed drive
Low EMI cycle switching
FIGURE 18-2:
EXTERNAL RESISTOR
V PEAK
R SERIES = ---------------–4
3 10
The ZCD module is useful when monitoring an A/C
waveform for, but not limited to, the following purposes:
•
•
•
•
External Resistor Selection
+
Rseries
ZCD pin
Rpulldown
optional
External
voltage
source
ZCDx_output
D
ZCDxPOL
Q1
Q
ZCDxOUT
LE
Interrupt
det
ZCDxINTP
Sets
ZCDIF flag
ZCDxINTN
Interrupt
det
DS40001722C-page 162
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
18.2
ZCD Logic Output
The ZCD module includes a Status bit, which can be
read to determine whether the current source or sink is
active. The ZCDxOUT bit of the ZCDCON register is
set when the current sink is active, and cleared when
the current source is active. The ZCDxOUT bit is
affected by the polarity bit.
18.3
ZCD Logic Polarity
The ZCDxPOL bit of the ZCDxCON register inverts the
ZCDxOUT bit relative to the current source and sink
output. When the ZCDxPOL bit is set, a ZCDxOUT high
indicates that the current source is active, and a low
output indicates that the current sink is active.
The ZCDxPOL bit affects the ZCD interrupts. See
Section 18.4 “ZCD Interrupts”.
18.5
Correcting for VREF offset
The actual voltage at which the ZCD switches is the
reference voltage at the non-inverting input of the ZCD
Op Amp. For external voltage source waveforms other
than square waves, this voltage offset from zero
causes the zero-cross event to occur either too early or
too late. When the waveform is varying relative to VSS,
then the zero cross is detected too early as the
waveform falls and too late as the waveform rises.
When the waveform is varying relative to VDD, then the
zero cross is detected too late as the waveform rises
and too early as the waveform falls. The actual offset
time can be determined for sinusoidal waveforms with
the corresponding equations shown in Equation 18-2.
EQUATION 18-2:
ZCD EVENT OFFSET
When External Voltage Source is relative to Vss:
18.4
ZCD Interrupts
An interrupt will be generated upon a change in the
ZCD logic output when the appropriate interrupt
enables are set. A rising edge detector and a falling
edge detector are present in the ZCD for this purpose.
The ZCDIF bit of the PIR3 register will be set when
either edge detector is triggered and its associated
enable bit is set. The ZCDxINTP enables rising edge
interrupts and the ZCDxINTN bit enables falling edge
interrupts. Both are located in the ZCDxCON register.
To fully enable the interrupt, the following bits must be set:
• ZCDIE bit of the PIE3 register
• ZCDxINTP bit of the ZCDxCON register
(for a rising edge detection)
• ZCDxINTN bit of the ZCDxCON register
(for a falling edge detection)
• PEIE and GIE bits of the INTCON register
Changing the ZCDxPOL bit will cause an interrupt,
regardless of the level of the ZCDxEN bit.
The ZCDIF bit of the PIR3 register must be cleared in
software as part of the interrupt service. If another edge
is detected while this flag is being cleared, the flag will
still be set at the end of the sequence.
T OFFSET
V REF
asin  ----------------
V PEAK
= -------------------------------2  Freq
When External Voltage Source is relative to VDD:
T OFFSET
V DD – V REF
asin  ---------------------------
V PEAK
= ------------------------------------------2  Freq
This offset time can be compensated for by adding a
pull-up or pull-down biasing resistor to the ZCD pin. A
pull-up resistor is used when the external voltage
source is varying relative to VSS. A pull-down resistor is
used when the voltage is varying relative to VDD. The
resistor adds a bias to the ZCD pin so that the target
external voltage source must go to zero to pull the pin
voltage to the VREF switching voltage. The pull-up or
pull-down value can be determined with the equations
shown in Equation 18-3 or Equation 18-4.
EQUATION 18-3:
ZCD PULL-UP/DOWN
When External Signal is relative to Vss:
R SERIE S  V PULLUP – V REF 
R PULLUP = ----------------------------------------------------------------V REF
When External Signal is relative to VDD:
R SERIES  V REF 
R PULLDOWN = ------------------------------------ V DD – V REF 
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
The pull-up and pull-down resistor values are
significantly affected by small variations of VREF.
Measuring VREF can be difficult, especially when the
waveform is relative to VDD. However, by combining
Equations 18-2 and 18-3, the resistor value can be
determined from the time difference between the
ZCDx_output high and low periods. Note that the time
difference, ∆T, is 4*TOFFSET. The equation for
determining the pull-up and pull-down resistor values
from the high and low ZCDx_output periods is shown in
Equation 18-4. The ZCDx_output signal can be directly
observed on a pin by routing the ZCDx_output signal
through one of the CLCs.
EQUATION 18-4:




V BI A S
R = R SERIES  ---------------------------------------------------------------- – 1
T  
 V PE AK  sin  Freq ----------


 
2 
18.6
Handling VPEAK variations
If the peak amplitude of the external voltage is
expected to vary, the series resistor must be selected
to keep the ZCD current source and sink below the
design maximum range of ± 600 A and above a reasonable minimum range. A general rule of thumb is that
the maximum peak voltage can be no more than six
times the minimum peak voltage. To ensure that the
maximum current does not exceed ± 600 A and the
minimum is at least ± 100 A, compute the series resistance as shown in Equation 18-5. The compensating
pull-up for this series resistance can be determined
with Equation 18-3 because the pull-up value is
independent from the peak voltage.
EQUATION 18-5:
SERIES R FOR V RANGE
V MAXPEAK + V MINPEAK
R SERIES = --------------------------------------------------------–4
7 10
R is pull-up or pull-down resistor.
VBIAS is VPULLUP when R is pull-up or VDD when R
is pull-down.
∆T is the ZCDx_output high and low period
difference.
18.7
Operation During Sleep
The ZCD current sources and interrupts are unaffected
by Sleep.
18.8
Effects of a Reset
The ZCD circuit can be configured to default to the active
or inactive state on Power-On-Reset (POR). When the
ZCDDIS Configuration bit is cleared, the ZCD circuit will
be active at POR. When the ZCDDIS Configuration bit is
set, the ZCDxEN bit of the ZCDxCON register must be
set to enable the ZCD module.
DS40001722C-page 164
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
18.9
Register Definitions: ZCD Control
REGISTER 18-1:
ZCDxCON: ZERO CROSS DETECTION CONTROL REGISTER
R/W-q/q
U-0
R-x/x
R/W-0/0
U-0
U-0
R/W-0/0
R/W-0/0
ZCDxEN
—
ZCDxOUT
ZCDxPOL
—
—
ZCDxINTP
ZCDxINTN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = value depends on configuration bits
bit 7
ZCDxEN: Zero-Cross Detection Enable bit
1 = Zero-cross detect is enabled. ZCD pin is forced to output to source and sink current.
0 = Zero-cross detect is disabled. ZCD pin operates according to PPS and TRIS controls.
bit 6
Unimplemented: Read as ‘0’
bit 5
ZCDxOUT: Zero-Cross Detection Logic Level bit
ZCDxPOL bit = 0:
1 = ZCD pin is sinking current
0 = ZCD pin is sourcing current
ZCDxPOL bit = 1:
1 = ZCD pin is sourcing current
0 = ZCD pin is sinking current
bit 4
ZCDxPOL: Zero-Cross Detection Logic Output Polarity bit
1 = ZCD logic output is inverted
0 = ZCD logic output is not inverted
bit 3-2
Unimplemented: Read as ‘0’
bit 1
ZCDxINTP: Zero-Cross Positive Edge Interrupt Enable bit
1 = ZCDIF bit is set on low-to-high ZCDx_output transition
0 = ZCDIF bit is unaffected by low-to-high ZCDx_output transition
bit 0
ZCDxINTN: Zero-Cross Negative Edge Interrupt Enable bit
1 = ZCDIF bit is set on high-to-low ZCDx_output transition
0 = ZCDIF bit is unaffected by high-to-low ZCDx_output transition
TABLE 18-1:
SUMMARY OF REGISTERS ASSOCIATED WITH THE ZCD MODULE
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on page
PIE3
—
—
—
ZCDIE
—
—
—
—
80
PIR3
—
—
—
ZCDIF
—
—
—
—
83
ZCD1EN
—
ZCD1OUT
ZCD1POL
—
—
Name
ZCD1CON
Legend:
TABLE 18-2:
Name
CONFIG2
Legend:
ZCD1INTP ZCD1INTN
165
— = unimplemented, read as ‘0’. Shaded cells are unused by the ZCD module.
Bits
SUMMARY OF CONFIGURATION BITS ASSOCIATED WITH THE ZCD MODULE
Bit -/7
Bit -/6
Bit 13/5
Bit 12/4
Bit 11/3
Bit 10/2
Bit 9/1
Bit 8/0
13:8
—
—
LVP
DEBUG
7:0
ZCDDIS
—
—
—
LPBOR
BORV
STVREN
PLLEN
—
PPS1WAY
WRT<1:0>
Register
on Page
50
— = unimplemented location, read as ‘0’. Shaded cells are not used by ZCD module.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
19.0
19.1.2
TIMER0 MODULE
8-BIT COUNTER MODE
The Timer0 module is an 8-bit timer/counter with the
following features:
In 8-Bit Counter mode, the Timer0 module will increment
on every rising or falling edge of the T0CKI pin.
•
•
•
•
•
•
8-Bit Counter mode using the T0CKI pin is selected by
setting the TMR0CS bit in the OPTION_REG register to
‘1’.
8-bit timer/counter register (TMR0)
8-bit prescaler (independent of Watchdog Timer)
Programmable internal or external clock source
Programmable external clock edge selection
Interrupt on overflow
TMR0 can be used to gate Timer1
The rising or falling transition of the incrementing edge
for either input source is determined by the TMR0SE bit
in the OPTION_REG register.
Figure 19-1 is a block diagram of the Timer0 module.
19.1
Timer0 Operation
The Timer0 module can be used as either an 8-bit timer
or an 8-bit counter.
19.1.1
8-BIT TIMER MODE
The Timer0 module will increment every instruction
cycle, if used without a prescaler. 8-bit Timer mode is
selected by clearing the TMR0CS bit of the
OPTION_REG register.
When TMR0 is written, the increment is inhibited for
two instruction cycles immediately following the write.
Note:
The value written to the TMR0 register
can be adjusted, in order to account for
the two instruction cycle delay when
TMR0 is written.
FIGURE 19-1:
BLOCK DIAGRAM OF THE TIMER0
FOSC/4
Data Bus
0
8
T0CKI
1
Sync
2 TCY
1
TMR0
0
TMR0SE TMR0CS
8-bit
Prescaler
PSA
Set Flag bit TMR0IF
on Overflow
Overflow to Timer1
8
PS<2:0>
DS40001722C-page 166
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PIC16(L)F1703/7
19.1.3
SOFTWARE PROGRAMMABLE
PRESCALER
A software programmable prescaler is available for
exclusive use with Timer0. The prescaler is enabled by
clearing the PSA bit of the OPTION_REG register.
Note:
The Watchdog Timer (WDT) uses its own
independent prescaler.
There are eight prescaler options for the Timer0 module ranging from 1:2 to 1:256. The prescale values are
selectable via the PS<2:0> bits of the OPTION_REG
register. In order to have a 1:1 prescaler value for the
Timer0 module, the prescaler must be disabled by
setting the PSA bit of the OPTION_REG register.
The prescaler is not readable or writable. All instructions
writing to the TMR0 register will clear the prescaler.
19.1.4
TIMER0 INTERRUPT
Timer0 will generate an interrupt when the TMR0
register overflows from FFh to 00h. The TMR0IF
interrupt flag bit of the INTCON register is set every
time the TMR0 register overflows, regardless of
whether or not the Timer0 interrupt is enabled. The
TMR0IF bit can only be cleared in software. The Timer0
interrupt enable is the TMR0IE bit of the INTCON
register.
Note:
19.1.5
The Timer0 interrupt cannot wake the
processor from Sleep since the timer is
frozen during Sleep.
8-BIT COUNTER MODE
SYNCHRONIZATION
When in 8-Bit Counter mode, the incrementing edge on
the T0CKI pin must be synchronized to the instruction
clock. Synchronization can be accomplished by
sampling the prescaler output on the Q2 and Q4 cycles
of the instruction clock. The high and low periods of the
external clocking source must meet the timing
requirements as shown in Table 26-12.
19.1.6
OPERATION DURING SLEEP
Timer0 cannot operate while the processor is in Sleep
mode. The contents of the TMR0 register will remain
unchanged while the processor is in Sleep mode.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
19.2
Register Definitions: Option Register
REGISTER 19-1:
OPTION_REG: OPTION REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
WPUEN
INTEDG
TMR0CS
TMR0SE
PSA
R/W-1/1
R/W-1/1
R/W-1/1
PS<2:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
WPUEN: Weak Pull-Up Enable bit
1 = All weak pull-ups are disabled (except MCLR, if it is enabled)
0 = Weak pull-ups are enabled by individual WPUx latch values
bit 6
INTEDG: Interrupt Edge Select bit
1 = Interrupt on rising edge of INT pin
0 = Interrupt on falling edge of INT pin
bit 5
TMR0CS: Timer0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock (FOSC/4)
bit 4
TMR0SE: Timer0 Source Edge Select bit
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
bit 3
PSA: Prescaler Assignment bit
1 = Prescaler is not assigned to the Timer0 module
0 = Prescaler is assigned to the Timer0 module
bit 2-0
PS<2:0>: Prescaler Rate Select bits
TABLE 19-1:
Name
INTCON
Bit Value
Timer0 Rate
000
001
010
011
100
101
110
111
1:2
1:4
1:8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER0
Bit 7
GIE
OPTION_REG WPUEN
Bit 6
PEIE
INTEDG
Bit 5
Bit 4
Bit 3
Bit 2
TMR0IE
INTE
IOCIE
TMR0IF
TMR0CS TMR0SE
TMR0
TRISA
PSA
Bit 1
Bit 0
INTF
IOCIF
PS<2:0>
—
TRISA5
TRISA4
77
168
TMR0
—
Register
on Page
166*
—(1)
TRISA2
TRISA1
TRISA0
113
Legend: — = Unimplemented location, read as ‘0’. Shaded cells are not used by the Timer0 module.
* Page provides register information.
Note 1: Unimplemented, read as ‘1’.
DS40001722C-page 168
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PIC16(L)F1703/7
20.0
• Gate Single-pulse mode
• Gate Value Status
• Gate Event Interrupt
TIMER1 MODULE WITH GATE
CONTROL
The Timer1 module is a 16-bit timer/counter with the
following features:
•
•
•
•
•
•
•
•
•
•
•
Figure 20-1 is a block diagram of the Timer1 module.
16-bit timer/counter register pair (TMR1H:TMR1L)
Programmable internal or external clock source
2-bit prescaler
Dedicated 32 kHz oscillator circuit
Multiple Timer1 gate (count enable) sources
Interrupt on overflow
Wake-up on overflow (external clock,
Asynchronous mode only)
Time base for the Capture/Compare function
Auto-conversion Trigger (with CCP)
Selectable Gate Source Polarity
Gate Toggle mode
FIGURE 20-1:
TIMER1 BLOCK DIAGRAM
T1GSS<1:0>
PPS
T1G
From Timer0
Overflow
01
Reserved
10
Reserved
T1GSPM
00
0
t1g_in
T1GVAL
0
Single-Pulse
D
Q
CK
R
Q
11
TMR1ON
T1GTM
T1GPOL
1
Acq. Control
1
Q1
Data Bus
D
Q
RD
T1GCON
EN
Interrupt
T1GGO/DONE
det
Set
TMR1GIF
TMR1GE
Set flag bit
TMR1IF on
Overflow
To ADC Auto-Conversion
TMR1ON
TMR1(2)
TMR1H
EN
TMR1L
Q
D
T1CLK
Synchronized
clock input
0
1
TMR1CS<1:0>
LFINTOSC
T1CKI
PPS
T1SYNC
11
(1)
Synchronize(3)
Prescaler
1, 2, 4, 8
det
10
FOSC
Internal
Clock
01
FOSC/4
Internal
Clock
00
2
T1CKPS<1:0>
FOSC/2
Internal
Clock
Sleep input
To Clock Switching Modules
Note 1: ST Buffer is high speed type when using T1CKI.
2: Timer1 register increments on rising edge.
3: Synchronize does not operate while in Sleep.
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PIC16(L)F1703/7
20.1
Timer1 Operation
20.2
The Timer1 module is a 16-bit incrementing counter
which is accessed through the TMR1H:TMR1L register
pair. Writes to TMR1H or TMR1L directly update the
counter.
When used with an internal clock source, the module is
a timer and increments on every instruction cycle.
When used with an external clock source, the module
can be used as either a timer or counter and increments on every selected edge of the external source.
Timer1 is enabled by configuring the TMR1ON and
TMR1GE bits in the T1CON and T1GCON registers,
respectively. Table 20-1 displays the Timer1 enable
selections.
TABLE 20-1:
TIMER1 ENABLE
SELECTIONS
Clock Source Selection
The TMR1CS<1:0> bits of the T1CON register are used
to select the clock source for Timer1. Table 20-2 displays
the clock source selections.
20.2.1
INTERNAL CLOCK SOURCE
When the internal clock source is selected, the
TMR1H:TMR1L register pair will increment on multiples
of FOSC as determined by the Timer1 prescaler.
When the FOSC internal clock source is selected, the
Timer1 register value will increment by four counts every
instruction clock cycle. Due to this condition, a 2 LSB
error in resolution will occur when reading the Timer1
value. To utilize the full resolution of Timer1, an
asynchronous input signal must be used to gate the
Timer1 clock input.
The following asynchronous sources may be used:
Timer1
Operation
• Asynchronous event on the T1G pin to Timer1
gate
TMR1ON
TMR1GE
0
0
Off
20.2.2
0
1
Off
1
0
Always On
When the external clock source is selected, the Timer1
module may work as a timer or a counter.
1
1
Count Enabled
EXTERNAL CLOCK SOURCE
When enabled to count, Timer1 is incremented on the
rising edge of the external clock input T1CKI, which can
be synchronized to the microcontroller system clock or
can run asynchronously.
Note:
In Counter mode, a falling edge must be
registered by the counter prior to the first
incrementing rising edge after any one or
more of the following conditions:
•
•
•
•
TABLE 20-2:
Timer1 enabled after POR
Write to TMR1H or TMR1L
Timer1 is disabled
Timer1 is disabled (TMR1ON = 0)
when T1CKI is high then Timer1 is
enabled (TMR1ON=1) when T1CKI is
low.
CLOCK SOURCE SELECTIONS
TMR1CS<1:0>
Clock Source
11
LFINTOSC
10
External Clocking on T1CKI Pin
01
System Clock (FOSC)
00
Instruction Clock (FOSC/4)
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20.3
Timer1 Prescaler
Timer1 has four prescaler options allowing 1, 2, 4 or 8
divisions of the clock input. The T1CKPS bits of the
T1CON register control the prescale counter. The
prescale counter is not directly readable or writable;
however, the prescaler counter is cleared upon a write to
TMR1H or TMR1L.
20.5
Timer1 can be configured to count freely or the count
can be enabled and disabled using Timer1 gate
circuitry. This is also referred to as Timer1 Gate Enable.
Timer1 gate can also be driven by multiple selectable
sources.
20.5.1
20.4
Timer1 Operation in
Asynchronous Counter Mode
If the control bit T1SYNC of the T1CON register is set,
the external clock input is not synchronized. The timer
increments asynchronously to the internal phase
clocks. If the external clock source is selected then the
timer will continue to run during Sleep and can
generate an interrupt on overflow, which will wake-up
the processor. However, special precautions in
software are needed to read/write the timer (see
Section 20.4.1 “Reading and Writing Timer1 in
Asynchronous Counter Mode”).
Note:
20.4.1
When switching from synchronous to
asynchronous operation, it is possible to
skip an increment. When switching from
asynchronous to synchronous operation,
it is possible to produce an additional
increment.
Timer1 Gate
TIMER1 GATE ENABLE
The Timer1 Gate Enable mode is enabled by setting
the TMR1GE bit of the T1GCON register. The polarity
of the Timer1 Gate Enable mode is configured using
the T1GPOL bit of the T1GCON register.
When Timer1 Gate Enable mode is enabled, Timer1
will increment on the rising edge of the Timer1 clock
source. When Timer1 Gate Enable mode is disabled,
no incrementing will occur and Timer1 will hold the
current count. See Figure 20-3 for timing details.
TABLE 20-3:
TIMER1 GATE ENABLE
SELECTIONS
T1CLK
T1GPOL
T1G
Timer1 Operation

0
0
Counts

0
1
Holds Count

1
0
Holds Count

1
1
Counts
READING AND WRITING TIMER1 IN
ASYNCHRONOUS COUNTER
MODE
Reading TMR1H or TMR1L while the timer is running
from an external asynchronous clock will ensure a valid
read (taken care of in hardware). However, the user
should keep in mind that reading the 16-bit timer in two
8-bit values itself, poses certain problems, since the
timer may overflow between the reads.
For writes, it is recommended that the user simply stop
the timer and write the desired values. A write
contention may occur by writing to the timer registers,
while the register is incrementing. This may produce an
unpredictable value in the TMR1H:TMR1L register pair.
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20.5.2
TIMER1 GATE SOURCE
SELECTION
Timer1 gate source selections are shown in Table 20-4.
Source selection is controlled by the T1GSS bits of the
T1GCON register. The polarity for each available source
is also selectable. Polarity selection is controlled by the
T1GPOL bit of the T1GCON register.
TABLE 20-4:
TIMER1 GATE SOURCES
T1GSS
Timer1 Gate Source
00
Timer1 Gate Pin
01
Overflow of Timer0
(TMR0 increments from FFh to 00h)
10
Reserved
11
Reserved
20.5.2.1
T1G Pin Gate Operation
The T1G pin is one source for Timer1 gate control. It
can be used to supply an external source to the Timer1
gate circuitry.
20.5.2.2
Timer0 Overflow Gate Operation
When Timer0 increments from FFh to 00h, a
low-to-high pulse will automatically be generated and
internally supplied to the Timer1 gate circuitry.
20.5.3
TIMER1 GATE TOGGLE MODE
When Timer1 Gate Toggle mode is enabled, it is possible to measure the full-cycle length of a Timer1 gate
signal, as opposed to the duration of a single level
pulse.
The Timer1 gate source is routed through a flip-flop that
changes state on every incrementing edge of the signal. See Figure 20-4 for timing details.
Timer1 Gate Toggle mode is enabled by setting the
T1GTM bit of the T1GCON register. When the T1GTM
bit is cleared, the flip-flop is cleared and held clear. This
is necessary in order to control which edge is
measured.
Note:
20.5.4
TIMER1 GATE SINGLE-PULSE
MODE
When Timer1 Gate Single-Pulse mode is enabled, it is
possible to capture a single-pulse gate event. Timer1
Gate Single-Pulse mode is first enabled by setting the
T1GSPM bit in the T1GCON register. Next, the
T1GGO/DONE bit in the T1GCON register must be set.
The Timer1 will be fully enabled on the next
incrementing edge. On the next trailing edge of the
pulse, the T1GGO/DONE bit will automatically be
cleared. No other gate events will be allowed to
increment Timer1 until the T1GGO/DONE bit is once
again set in software. See Figure 20-5 for timing details.
If the Single-Pulse Gate mode is disabled by clearing the
T1GSPM bit in the T1GCON register, the T1GGO/DONE
bit should also be cleared.
Enabling the Toggle mode and the Single-Pulse mode
simultaneously will permit both sections to work
together. This allows the cycle times on the Timer1 gate
source to be measured. See Figure 20-6 for timing
details.
20.5.5
TIMER1 GATE VALUE STATUS
When Timer1 Gate Value Status is utilized, it is possible
to read the most current level of the gate control value.
The value is stored in the T1GVAL bit in the T1GCON
register. The T1GVAL bit is valid even when the Timer1
gate is not enabled (TMR1GE bit is cleared).
20.5.6
TIMER1 GATE EVENT INTERRUPT
When Timer1 Gate Event Interrupt is enabled, it is
possible to generate an interrupt upon the completion
of a gate event. When the falling edge of T1GVAL
occurs, the TMR1GIF flag bit in the PIR1 register will be
set. If the TMR1GIE bit in the PIE1 register is set, then
an interrupt will be recognized.
The TMR1GIF flag bit operates even when the Timer1
gate is not enabled (TMR1GE bit is cleared).
Enabling Toggle mode at the same time
as changing the gate polarity may result in
indeterminate operation.
DS40001722C-page 172
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20.6
Timer1 Interrupt
The Timer1 register pair (TMR1H:TMR1L) increments
to FFFFh and rolls over to 0000h. When Timer1 rolls
over, the Timer1 interrupt flag bit of the PIR1 register is
set. To enable the interrupt on rollover, you must set
these bits:
•
•
•
•
TMR1ON bit of the T1CON register
TMR1IE bit of the PIE1 register
PEIE bit of the INTCON register
GIE bit of the INTCON register
The interrupt is cleared by clearing the TMR1IF bit in
the Interrupt Service Routine.
The TMR1H:TMR1L register pair and the
TMR1IF bit should be cleared before
enabling interrupts.
Note:
20.7
Timer1 Operation During Sleep
Timer1 can only operate during Sleep when setup in
Asynchronous Counter mode. In this mode, an external
or LFINTOSC clock source can be used to increment
the counter. To set up the timer to wake the device:
•
•
•
•
•
TMR1ON bit of the T1CON register must be set
TMR1IE bit of the PIE1 register must be set
PEIE bit of the INTCON register must be set
T1SYNC bit of the T1CON register must be set
TMR1CS bits of the T1CON register must be
configured
The device will wake-up on an overflow and execute
the next instructions. If the GIE bit of the INTCON
register is set, the device will call the Interrupt Service
Routine.
20.8
CCP Capture/Compare Time Base
The CCP modules use the TMR1H:TMR1L register
pair as the time base when operating in Capture or
Compare mode.
In Capture mode, the value in the TMR1H:TMR1L
register pair is copied into the CCPR1H:CCPR1L
register pair on a configured event.
In Compare mode, an event is triggered when the value
CCPR1H:CCPR1L register pair matches the value in
the TMR1H:TMR1L register pair. This event can be an
Auto-conversion Trigger.
For
more
information,
see
“Capture/Compare/PWM Modules”.
20.9
Section 22.0
CCP Auto-Conversion Trigger
When any of the CCP’s are configured to trigger an
auto-conversion, the trigger will clear the
TMR1H:TMR1L register pair. This auto-conversion
does not cause a Timer1 interrupt. The CCP module
may still be configured to generate a CCP interrupt.
In this mode of operation, the CCPR1H:CCPR1L
register pair becomes the period register for Timer1.
Timer1 should be synchronized and FOSC/4 should be
selected as the clock source in order to utilize the
Auto-conversion Trigger. Asynchronous operation of
Timer1 can cause an Auto-conversion Trigger to be
missed.
In the event that a write to TMR1H or TMR1L coincides
with an Auto-conversion Trigger from the CCP, the
write will take precedence.
For more information, see Section 22.2.4 “Auto-Conversion Trigger”.
Secondary oscillator will continue to operate in Sleep
regardless of the T1SYNC bit setting.
FIGURE 20-2:
TIMER1 INCREMENTING EDGE
T1CKI = 1
when TMR1
Enabled
T1CKI = 0
when TMR1
Enabled
Note 1:
2:
Arrows indicate counter increments.
In Counter mode, a falling edge must be registered by the counter prior to the first incrementing rising edge of the clock.
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PIC16(L)F1703/7
FIGURE 20-3:
TIMER1 GATE ENABLE MODE
TMR1GE
T1GPOL
t1g_in
T1CKI
T1GVAL
Timer1
N
FIGURE 20-4:
N+1
N+2
N+3
N+4
TIMER1 GATE TOGGLE MODE
TMR1GE
T1GPOL
T1GTM
t1g_in
T1CKI
T1GVAL
Timer1
N
DS40001722C-page 174
N+1 N+2 N+3
N+4
N+5 N+6 N+7
N+8
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PIC16(L)F1703/7
FIGURE 20-5:
TIMER1 GATE SINGLE-PULSE MODE
TMR1GE
T1GPOL
T1GSPM
T1GGO/
Cleared by hardware on
falling edge of T1GVAL
Set by software
DONE
Counting enabled on
rising edge of T1G
t1g_in
T1CKI
T1GVAL
Timer1
TMR1GIF
N
Cleared by software
 2013-2015 Microchip Technology Inc.
N+1
N+2
Set by hardware on
falling edge of T1GVAL
Cleared by
software
DS40001722C-page 175
PIC16(L)F1703/7
FIGURE 20-6:
TIMER1 GATE SINGLE-PULSE AND TOGGLE COMBINED MODE
TMR1GE
T1GPOL
T1GSPM
T1GTM
T1GGO/
Cleared by hardware on
falling edge of T1GVAL
Set by software
DONE
Counting enabled on
rising edge of T1G
t1g_in
T1CKI
T1GVAL
Timer1
TMR1GIF
DS40001722C-page 176
N
Cleared by software
N+1
N+2
N+3
N+4
Set by hardware on
falling edge of T1GVAL
Cleared by
software
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PIC16(L)F1703/7
20.10 Register Definitions: Timer1 Control
REGISTER 20-1:
R/W-0/u
T1CON: TIMER1 CONTROL REGISTER
R/W-0/u
R/W-0/u
TMR1CS<1:0>
R/W-0/u
T1CKPS<1:0>
U-0
R/W-0/u
U-0
R/W-0/u
—
T1SYNC
—
TMR1ON
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
TMR1CS<1:0>: Timer1 Clock Source Select bits
11 = LFINTOSC
10 = External clock from T1CKI pin (on rising edge)
01 = Timer1 clock source is system clock (FOSC)
00 = Timer1 clock source is instruction clock (FOSC/4)
bit 5-4
T1CKPS<1:0>: Timer1 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
bit 3
Unimplemented: Read as ‘0’
bit 2
T1SYNC: Timer1 Synchronization Control bit
1 = Do not synchronize asynchronous clock input
0 = Synchronize asynchronous clock input with system clock (FOSC)
bit 1
Unimplemented: Read as ‘0’
bit 0
TMR1ON: Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1 and clears Timer1 gate flip-flop
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PIC16(L)F1703/7
REGISTER 20-2:
T1GCON: TIMER1 GATE CONTROL REGISTER
R/W-0/u
R/W-0/u
R/W-0/u
R/W-0/u
R/W/HC-0/u
R-x/x
TMR1GE
T1GPOL
T1GTM
T1GSPM
T1GGO/
DONE
T1GVAL
R/W-0/u
R/W-0/u
T1GSS<1:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
HC = Bit is cleared by hardware
bit 7
TMR1GE: Timer1 Gate Enable bit
If TMR1ON = 0:
This bit is ignored
If TMR1ON = 1:
1 = Timer1 counting is controlled by the Timer1 gate function
0 = Timer1 counts regardless of Timer1 gate function
bit 6
T1GPOL: Timer1 Gate Polarity bit
1 = Timer1 gate is active-high (Timer1 counts when gate is high)
0 = Timer1 gate is active-low (Timer1 counts when gate is low)
bit 5
T1GTM: Timer1 Gate Toggle Mode bit
1 = Timer1 Gate Toggle mode is enabled
0 = Timer1 Gate Toggle mode is disabled and toggle flip-flop is cleared
Timer1 gate flip-flop toggles on every rising edge.
bit 4
T1GSPM: Timer1 Gate Single-Pulse Mode bit
1 = Timer1 Gate Single-Pulse mode is enabled and is controlling Timer1 gate
0 = Timer1 Gate Single-Pulse mode is disabled
bit 3
T1GGO/DONE: Timer1 Gate Single-Pulse Acquisition Status bit
1 = Timer1 gate single-pulse acquisition is ready, waiting for an edge
0 = Timer1 gate single-pulse acquisition has completed or has not been started
bit 2
T1GVAL: Timer1 Gate Value Status bit
Indicates the current state of the Timer1 gate that could be provided to TMR1H:TMR1L
Unaffected by Timer1 Gate Enable (TMR1GE)
bit 1-0
T1GSS<1:0>: Timer1 Gate Source Select bits
11 = Reserved
10 = Reserved
01 = Timer0 overflow output
00 = Timer1 gate pin
DS40001722C-page 178
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TABLE 20-5:
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
ANSELA
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
114
CCP1CON
—
—
DC1B<1:0>
CCP1M<3:0>
CCP2CON
—
—
DC2B<1:0>
CCP2M<3:0>
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
Name
INTCON
PIE1
PIR1
TMR1H
Holding Register for the Most Significant Byte of the 16-bit TMR1 Register
TMR1L
Holding Register for the Least Significant Byte of the 16-bit TMR1 Register
TRISA
T1CON
T1GCON
Legend:
*
Note 1:
—
—
TMR1CS<1:0>
TMR1GE
T1GPOL
TRISA5
TRISA4
T1CKPS<1:0>
T1GTM
T1GSPM
193
193
81
169*
169*
—(1)
TRISA2
TRISA1
TRISA0
113
—
T1SYNC
—
TMR1ON
177
T1GGO/
DONE
T1GVAL
T1GSS<1:0>
178
— = unimplemented location, read as ‘0’. Shaded cells are not used by the Timer1 module.
Page provides register information.
Unimplemented, read as ‘1’.
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PIC16(L)F1703/7
21.0
TIMER2 MODULE
The Timer2 module is an 8-bit timer that incorporates
the following features:
• 8-bit Timer and Period registers (TMR2 and PR2,
respectively)
• Readable and writable (both registers)
• Software programmable prescaler (1:1, 1:4, 1:16,
and 1:64)
• Software programmable postscaler (1:1 to 1:16)
• Interrupt on TMR2 match with PR2, respectively
• Optional use as the shift clock for the MSSP
module
See Figure 21-1 for a block diagram of Timer2.
FIGURE 21-1:
Fosc/4
TIMER2 BLOCK DIAGRAM
Prescaler
1:1, 1:4, 1:16, 1:64
T2_match
TMR2
R
To Peripherals
2
T2CKPS<1:0>
Comparator
Postscaler
1:1 to 1:16
set bit
TMR2IF
4
PR2
DS40001722C-page 180
T2OUTPS<3:0>
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21.1
Timer2 Operation
The clock input to the Timer2 modules is the system
instruction clock (FOSC/4).
TMR2 increments from 00h on each clock edge.
A 4-bit counter/prescaler on the clock input allows direct
input, divide-by-4 and divide-by-16 prescale options.
These options are selected by the prescaler control bits,
T2CKPS<1:0> of the T2CON register. The value of
TMR2 is compared to that of the Period register, PR2, on
each clock cycle. When the two values match, the
comparator generates a match signal as the timer
output. This signal also resets the value of TMR2 to 00h
on the next cycle and drives the output
counter/postscaler
(see
Section 21.2
“Timer2
Interrupt”).
21.3
Timer2 Output
The unscaled output of TMR2 is available primarily to
the CCP modules, where it is used as a time base for
operations in PWM mode.
Timer2 can be optionally used as the shift clock source
for the MSSP module operating in SPI mode.
Additional information is provided in Section 23.0
“Master Synchronous Serial Port (MSSP) Module”
21.4
Timer2 Operation During Sleep
The Timer2 timers cannot be operated while the
processor is in Sleep mode. The contents of the TMR2
and PR2 registers will remain unchanged while the
processor is in Sleep mode.
The TMR2 and PR2 registers are both directly readable
and writable. The TMR2 register is cleared on any
device Reset, whereas the PR2 register initializes to
FFh. Both the prescaler and postscaler counters are
cleared on the following events:
•
•
•
•
•
•
•
•
•
a write to the TMR2 register
a write to the T2CON register
Power-on Reset (POR)
Brown-out Reset (BOR)
MCLR Reset
Watchdog Timer (WDT) Reset
Stack Overflow Reset
Stack Underflow Reset
RESET Instruction
Note:
21.2
TMR2 is not cleared when T2CON is
written.
Timer2 Interrupt
Timer2 can also generate an optional device interrupt.
The Timer2 output signal (TMR2-to-PR2 match)
provides the input for the 4-bit counter/postscaler. This
counter generates the TMR2 match interrupt flag which
is latched in TMR2IF of the PIR1 register. The interrupt
is enabled by setting the TMR2 Match Interrupt Enable
bit, TMR2IE, of the PIE1 register.
A range of 16 postscale options (from 1:1 through 1:16
inclusive) can be selected with the postscaler control
bits, T2OUTPS<3:0>, of the T2CON register.
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PIC16(L)F1703/7
21.5
Register Definitions: Timer2 Control
REGISTER 21-1:
U-0
T2CON: TIMER2 CONTROL REGISTER
R/W-0/0
—
R/W-0/0
R/W-0/0
R/W-0/0
T2OUTPS<3:0>
R/W-0/0
R/W-0/0
TMR2ON
bit 7
R/W-0/0
T2CKPS<1:0>
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
Unimplemented: Read as ‘0’
bit 6-3
T2OUTPS<3:0>: Timer2 Output Postscaler Select bits
1111 = 1:16 Postscaler
1110 = 1:15 Postscaler
1101 = 1:14 Postscaler
1100 = 1:13 Postscaler
1011 = 1:12 Postscaler
1010 = 1:11 Postscaler
1001 = 1:10 Postscaler
1000 = 1:9 Postscaler
0111 = 1:8 Postscaler
0110 = 1:7 Postscaler
0101 = 1:6 Postscaler
0100 = 1:5 Postscaler
0011 = 1:4 Postscaler
0010 = 1:3 Postscaler
0001 = 1:2 Postscaler
0000 = 1:1 Postscaler
bit 2
TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
bit 1-0
T2CKPS<1:0>: Timer2 Clock Prescale Select bits
11 = Prescaler is 64
10 = Prescaler is 16
01 = Prescaler is 4
00 = Prescaler is 1
DS40001722C-page 182
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PIC16(L)F1703/7
TABLE 21-1:
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER2
Bit 7
Bit 6
CCP2CON
—
—
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
PIR1
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
81
PR2
Timer2 Module Period Register
INTCON
PIE1
T2CON
TMR2
—
Bit 5
Bit 4
Bit 3
DC2B<1:0>
T2OUTPS<3:0>
Bit 2
Bit 1
Bit 0
Register
on Page
Name
CCP2M<3:0>
193
180*
TMR2ON
T2CKPS<1:0>
Holding Register for the 8-bit TMR2 Register
182
180*
Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used for Timer2 module.
* Page provides register information.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 183
PIC16(L)F1703/7
22.0
CAPTURE/COMPARE/PWM
MODULES
The Capture/Compare/PWM module is a peripheral
which allows the user to time and control different
events, and to generate Pulse-Width Modulation
(PWM) signals. In Capture mode, the peripheral allows
the timing of the duration of an event. The Compare
mode allows the user to trigger an external event when
a predetermined amount of time has expired. The
PWM mode can generate Pulse-Width Modulated
signals of varying frequency and duty cycle.
This family of devices contains two standard
Capture/Compare/PWM modules (CCP1 and CCP2).
The Capture and Compare functions are identical for all
CCP modules.
Note 1: In devices with more than one CCP
module, it is very important to pay close
attention to the register names used. A
number placed after the module acronym
is used to distinguish between separate
modules. For example, the CCP1CON
and CCP2CON control the same
operational aspects of two completely
different CCP modules.
2: Throughout
this
section,
generic
references to a CCP module in any of its
operating modes may be interpreted as
being equally applicable to CCPx module.
Register names, module signals, I/O pins,
and bit names may use the generic
designator ‘x’ to indicate the use of a
numeral to distinguish a particular module,
when required.
DS40001722C-page 184
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22.1
22.1.2
Capture Mode
The Capture mode function described in this section is
available and identical for all CCP modules.
Capture mode makes use of the 16-bit Timer1
resource. When an event occurs on the CCPx pin, the
16-bit CCPRxH:CCPRxL register pair captures and
stores the 16-bit value of the TMR1H:TMR1L register
pair, respectively. An event is defined as one of the
following and is configured by the CCPxM<3:0> bits of
the CCPxCON register:
•
•
•
•
Every falling edge
Every rising edge
Every 4th rising edge
Every 16th rising edge
When a capture is made, the Interrupt Request Flag bit
CCPxIF of the PIRx register is set. The interrupt flag
must be cleared in software. If another capture occurs
before the value in the CCPRxH, CCPRxL register pair
is read, the old captured value is overwritten by the new
captured value.
Figure 22-1 shows a simplified diagram of the capture
operation.
22.1.1
CCP PIN CONFIGURATION
In Capture mode, the CCPx pin should be configured
as an input by setting the associated TRIS control bit.
Note:
If the CCPx pin is configured as an output,
a write to the port can cause a capture
condition.
FIGURE 22-1:
Prescaler
 1, 4, 16
CAPTURE MODE
OPERATION BLOCK
DIAGRAM
Set Flag bit CCPxIF
(PIRx register)
CCPx
pin
CCPRxH
TIMER1 MODE RESOURCE
Timer1 must be running in Timer mode or Synchronized
Counter mode for the CCP module to use the capture
feature. In Asynchronous Counter mode, the capture
operation may not work.
See Section 20.0 “Timer1 Module with Gate
Control” for more information on configuring Timer1.
22.1.3
SOFTWARE INTERRUPT MODE
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCPxIE interrupt enable bit of the PIEx register clear to
avoid false interrupts. Additionally, the user should
clear the CCPxIF interrupt flag bit of the PIRx register
following any change in Operating mode.
Note:
22.1.4
Clocking Timer1 from the system clock
(FOSC) should not be used in Capture
mode. In order for Capture mode to
recognize the trigger event on the CCPx
pin, Timer1 must be clocked from the
instruction clock (FOSC/4) or from an
external clock source.
CCP PRESCALER
There are four prescaler settings specified by the
CCPxM<3:0> bits of the CCPxCON register. Whenever
the CCP module is turned off, or the CCP module is not
in Capture mode, the prescaler counter is cleared. Any
Reset will clear the prescaler counter.
Switching from one capture prescaler to another does not
clear the prescaler and may generate a false interrupt. To
avoid this unexpected operation, turn the module off by
clearing the CCPxCON register before changing the
prescaler. Example 22-1 demonstrates the code to
perform this function.
EXAMPLE 22-1:
CCPRxL
CHANGING BETWEEN
CAPTURE PRESCALERS
BANKSEL CCPxCON
and
Edge Detect
Capture
Enable
TMR1H
CCPxM<3:0>
System Clock (FOSC)
 2013-2015 Microchip Technology Inc.
TMR1L
CLRF
MOVLW
MOVWF
;Set Bank bits to point
;to CCPxCON
CCPxCON
;Turn CCP module off
NEW_CAPT_PS ;Load the W reg with
;the new prescaler
;move value and CCP ON
CCPxCON
;Load CCPxCON with this
;value
DS40001722C-page 185
PIC16(L)F1703/7
22.1.5
CAPTURE DURING SLEEP
Capture mode depends upon the Timer1 module for
proper operation. There are two options for driving the
Timer1 module in Capture mode. It can be driven by the
instruction clock (FOSC/4), or by an external clock source.
When Timer1 is clocked by FOSC/4, Timer1 will not
increment during Sleep. When the device wakes from
Sleep, Timer1 will continue from its previous state.
Capture mode will operate during Sleep when Timer1
is clocked by an external clock source.
DS40001722C-page 186
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22.2
22.2.2
Compare Mode
The Compare mode function described in this section
is available and identical for all CCP modules.
Compare mode makes use of the 16-bit Timer1
resource. The 16-bit value of the CCPRxH:CCPRxL
register pair is constantly compared against the 16-bit
value of the TMR1H:TMR1L register pair. When a
match occurs, one of the following events can occur:
•
•
•
•
•
In Compare mode, Timer1 must be running in either
Timer mode or Synchronized Counter mode. The
compare operation may not work in Asynchronous
Counter mode.
See Section 20.0 “Timer1 Module with Gate Control”
for more information on configuring Timer1.
Note:
Toggle the CCPx output
Set the CCPx output
Clear the CCPx output
Generate an Auto-conversion Trigger
Generate a Software Interrupt
The action on the pin is based on the value of the
CCPxM<3:0> control bits of the CCPxCON register. At
the same time, the interrupt flag CCPxIF bit is set.
All Compare modes can generate an interrupt.
Figure 22-2 shows a simplified diagram of the compare
operation.
FIGURE 22-2:
COMPARE MODE
OPERATION BLOCK
DIAGRAM
CCPxM<3:0>
Mode Select
Q
S
R
Output
Logic
Match
TRIS
Output Enable
Comparator
TMR1H
TMR1L
Auto-conversion Trigger
22.2.1
CCPX PIN CONFIGURATION
The user must configure the CCPx pin as an output by
clearing the associated TRIS bit.
Note:
22.2.3
Clocking Timer1 from the system clock
(FOSC) should not be used in Compare
mode. In order for Compare mode to
recognize the trigger event on the CCPx
pin, TImer1 must be clocked from the
instruction clock (FOSC/4) or from an
external clock source.
SOFTWARE INTERRUPT MODE
When Generate Software Interrupt mode is chosen
(CCPxM<3:0> = 1010), the CCPx module does not
assert control of the CCPx pin (see the CCPxCON
register).
22.2.4
AUTO-CONVERSION TRIGGER
When Auto-conversion Trigger mode is chosen
(CCPxM<3:0> = 1011), the CCPx module does the
following:
• Resets Timer1
• Starts an ADC conversion if ADC is enabled
Set CCPxIF Interrupt Flag
(PIRx)
4
CCPRxH CCPRxL
CCPx
Pin
TIMER1 MODE RESOURCE
Clearing the CCPxCON register will force
the CCPx compare output latch to the
default low level. This is not the PORT I/O
data latch.
 2013-2015 Microchip Technology Inc.
The CCPx module does not assert control of the CCPx
pin in this mode.
The Auto-conversion Trigger output of the CCP occurs
immediately upon a match between the TMR1H,
TMR1L register pair and the CCPRxH, CCPRxL
register pair. The TMR1H, TMR1L register pair is not
reset until the next rising edge of the Timer1 clock. The
Auto-conversion Trigger output starts an ADC conversion (if the ADC module is enabled). This allows the
CCPRxH, CCPRxL register pair to effectively provide a
16-bit programmable period register for Timer1.
Refer to Section 16.2.5 “Auto-Conversion Trigger”
for more information.
Note 1: The Auto-conversion Trigger from the
CCP module does not set interrupt flag
bit TMR1IF of the PIR1 register.
2: Removing the match condition by
changing the contents of the CCPRxH
and CCPRxL register pair, between the
clock
edge that
generates
the
Auto-conversion Trigger and the clock
edge that generates the Timer1 Reset,
will preclude the Reset from occurring.
DS40001722C-page 187
PIC16(L)F1703/7
22.2.5
COMPARE DURING SLEEP
The Compare mode is dependent upon the system
clock (FOSC) for proper operation. Since FOSC is shut
down during Sleep mode, the Compare mode will not
function properly during Sleep.
DS40001722C-page 188
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22.3
PWM Overview
Pulse-Width Modulation (PWM) is a scheme that
provides power to a load by switching quickly between
fully on and fully off states. The PWM signal resembles
a square wave where the high portion of the signal is
considered the on state and the low portion of the signal
is considered the off state. The high portion, also known
as the pulse width, can vary in time and is defined in
steps. A larger number of steps applied, which
lengthens the pulse width, also supplies more power to
the load. Lowering the number of steps applied, which
shortens the pulse width, supplies less power. The
PWM period is defined as the duration of one complete
cycle or the total amount of on and off time combined.
PWM resolution defines the maximum number of steps
that can be present in a single PWM period. A higher
resolution allows for more precise control of the pulse
width time and in turn the power that is applied to the
load.
FIGURE 22-3:
Period
Pulse Width
22.3.1
TMR2 = 0
FIGURE 22-4:
The standard PWM mode generates a Pulse-Width
Modulation (PWM) signal on the CCPx pin with up to 10
bits of resolution. The period, duty cycle, and resolution
are controlled by the following registers:
•
•
•
•
SIMPLIFIED PWM BLOCK
DIAGRAM
CCP1CON<5:4>
Duty Cycle Registers
CCPR1L
CCPR1H(2) (Slave)
CCP1
R
Comparator
(1)
TMR2
Q
S
TRIS
Comparator
STANDARD PWM OPERATION
The standard PWM function described in this section is
available and identical for all CCP modules.
TMR2 = PR2
TMR2 = CCPRxH:CCPxCON<5:4>
The term duty cycle describes the proportion of the on
time to the off time and is expressed in percentages,
where 0% is fully off and 100% is fully on. A lower duty
cycle corresponds to less power applied and a higher
duty cycle corresponds to more power applied.
Figure 22-3 shows a typical waveform of the PWM
signal.
CCP PWM OUTPUT SIGNAL
PR2
Note
1:
2:
Clear Timer,
toggle CCP1 pin and
latch duty cycle
The 8-bit timer TMR2 register is
concatenated with the 2-bit internal system
clock (FOSC), or two bits of the prescaler, to
create the 10-bit time base.
In PWM mode, CCPR1H is a read-only
register.
PR2 registers
T2CON registers
CCPRxL registers
CCPxCON registers
Figure 22-4 shows a simplified block diagram of PWM
operation.
Note:
The corresponding TRIS bit must be
cleared to enable the PWM output on the
CCPx pin.
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DS40001722C-page 189
PIC16(L)F1703/7
22.3.2
SETUP FOR PWM OPERATION
The following steps should be taken when configuring
the CCP module for standard PWM operation:
1.
2.
3.
4.
5.
6.
Use the desired output pin RxyPPS control to
select CCPx as the source and disable the
CCPx pin output driver by setting the associated
TRIS bit.
Load the PR2 register with the PWM period
value.
Configure the CCP module for the PWM mode
by loading the CCPxCON register with the
appropriate values.
Load the CCPRxL register and the DCxBx bits
of the CCPxCON register, with the PWM duty
cycle value.
Configure and start Timer2:
• Clear the TMR2IF interrupt flag bit of the
PIRx register. See Note below.
• Configure the T2CKPS bits of the T2CON
register with the Timer prescale value.
• Enable the Timer by setting the TMR2ON
bit of the T2CON register.
Enable PWM output pin:
• Wait until the Timer overflows and the
TMR2IF bit of the PIR1 register is set. See
Note below.
• Enable the CCPx pin output driver by
clearing the associated TRIS bit.
Note:
22.3.3
• TMR2 is cleared
• The CCPx pin is set. (Exception: If the PWM duty
cycle = 0%, the pin will not be set.)
• The PWM duty cycle is latched from CCPRxL into
CCPRxH.
Note:
22.3.5
The Timer postscaler (see Section 21.1
“Timer2 Operation”) is not used in the
determination of the PWM frequency.
PWM DUTY CYCLE
The PWM duty cycle is specified by writing a 10-bit
value to multiple registers: CCPRxL register and
DCxB<1:0> bits of the CCPxCON register. The
CCPRxL contains the eight MSbs and the DCxB<1:0>
bits of the CCPxCON register contain the two LSbs.
CCPRxL and DCxB<1:0> bits of the CCPxCON
register can be written to at any time. The duty cycle
value is not latched into CCPRxH until after the period
completes (i.e., a match between PR2 and TMR2
registers occurs). While using the PWM, the CCPRxH
register is read-only.
Equation 22-2 is used to calculate the PWM pulse
width.
Equation 22-3 is used to calculate the PWM duty cycle
ratio.
In order to send a complete duty cycle and
period on the first PWM output, the above
steps must be included in the setup
sequence. If it is not critical to start with a
complete PWM signal on the first output,
then step 6 may be ignored.
EQUATION 22-2:
TIMER2 TIMER RESOURCE
EQUATION 22-3:
The PWM standard mode makes use of the 8-bit
Timer2 timer resources to specify the PWM period.
22.3.4
When TMR2 is equal to PR2, the following three events
occur on the next increment cycle:
PULSE WIDTH
Pulse Width =  CCPRxL:CCPxCON<5:4>  
T OSC  (TMR2 Prescale Value)
DUTY CYCLE RATIO
 CCPRxL:CCPxCON<5:4> 
Duty Cycle Ratio = ----------------------------------------------------------------------4  PR2 + 1 
PWM PERIOD
The PWM period is specified by the PR2 register of
Timer2. The PWM period can be calculated using the
formula of Equation 22-1.
EQUATION 22-1:
PWM PERIOD
PWM Period =   PR2  + 1   4  T OSC 
(TMR2 Prescale Value)
Note 1:
TOSC = 1/FOSC
DS40001722C-page 190
The CCPRxH register and a 2-bit internal latch are
used to double buffer the PWM duty cycle. This double
buffering is essential for glitchless PWM operation.
The 8-bit timer TMR2 register is concatenated with
either the 2-bit internal system clock (FOSC), or two bits
of the prescaler, to create the 10-bit time base. The
system clock is used if the Timer2 prescaler is set to 1:1.
When the 10-bit time base matches the CCPRxH and
2-bit latch, then the CCPx pin is cleared (see
Figure 22-4).
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
22.3.6
PWM RESOLUTION
EQUATION 22-4:
The resolution determines the number of available duty
cycles for a given period. For example, a 10-bit resolution
will result in 1024 discrete duty cycles, whereas an 8-bit
resolution will result in 256 discrete duty cycles.
The maximum PWM resolution is 10 bits when PR2 is
255. The resolution is a function of the PR2 register
value as shown by Equation 22-4.
TABLE 22-1:
log  4  PR2 + 1  
Resolution = ------------------------------------------ bits
log  2 
Note:
If the pulse width value is greater than the
period the assigned PWM pin(s) will
remain unchanged.
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (FOSC = 20 MHz)
PWM Frequency
1.22 kHz
Timer Prescale
PR2 Value
Maximum Resolution (bits)
TABLE 22-2:
PWM RESOLUTION
4.88 kHz
19.53 kHz
78.12 kHz
156.3 kHz
208.3 kHz
16
4
1
1
1
1
0xFF
0xFF
0xFF
0x3F
0x1F
0x17
10
10
10
8
7
6.6
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (FOSC = 8 MHz)
PWM Frequency
1.22 kHz
4.90 kHz
19.61 kHz
76.92 kHz
153.85 kHz
200.0 kHz
16
4
1
1
1
1
0x65
0x65
0x65
0x19
0x0C
0x09
8
8
8
6
5
5
Timer Prescale
PR2 Value
Maximum Resolution (bits)
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DS40001722C-page 191
PIC16(L)F1703/7
22.3.7
OPERATION IN SLEEP MODE
In Sleep mode, the TMR2 register will not increment
and the state of the module will not change. If the CCPx
pin is driving a value, it will continue to drive that value.
When the device wakes up, TMR2 will continue from its
previous state.
22.3.8
CHANGES IN SYSTEM CLOCK
FREQUENCY
The PWM frequency is derived from the system clock
frequency. Any changes in the system clock frequency
will result in changes to the PWM frequency. See
Section 6.0 “Oscillator Module (with Fail-Safe
Clock Monitor)” for additional details.
22.3.9
EFFECTS OF RESET
Any Reset will force all ports to Input mode and the
CCP registers to their Reset states.
TABLE 22-3:
Name
CCP1CON
SUMMARY OF REGISTERS ASSOCIATED WITH STANDARD PWM
Bit 7
Bit 6
—
—
Bit 5
PIE1
Bit 3
DC1B<1:0>
CCPR1L
INTCON
Bit 4
Bit 2
Bit 1
Bit 0
CCP1M<3:0>
Register
on Page
193
CCPR1L<7:0>
190*
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
PIE2
—
—
—
—
BCL1IE
—
—
CCP2IE
79
PIR1
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
81
PIR2
—
—
—
—
BCL1IF
—
—
CCP2IF
PR2
PR2
RxyPPS
—
T2CON
—
TMR2
—
—
RxyPPS<4:0>
T2OUTPS<3:0>
82
180*
TMR2ON
132
T2CKPS<1:0>
TMR2
182
180
Legend: — = Unimplemented location, read as ‘0’. Shaded cells are not used by the PWM.
* Page provides register information.
Note 1: Unimplemented, read as ‘1’.
DS40001722C-page 192
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
22.4
Register Definitions: CCP Control
REGISTER 22-1:
CCPxCON: CCPx CONTROL REGISTER
U-0
U-0
—
—
R/W-0/0
R/W-0/0
R/W-0/0
DCxB<1:0>
R/W-0/0
R/W-0/0
R/W-0/0
CCPxM<3:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Reset
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
DCxB<1:0>: PWM Duty Cycle Least Significant bits
Capture mode:
Unused
Compare mode:
Unused
PWM mode:
These bits are the two LSbs of the PWM duty cycle. The eight MSbs are found in CCPRxL.
bit 3-0
CCPxM<3:0>: CCPx Mode Select bits
11xx = PWM mode
1011 = Compare mode: Auto-conversion Trigger (sets CCPxIF bit), starts ADC conversion if
TRIGSEL = CCPx (see Register 16-3)
1010 = Compare mode: generate software interrupt only
1001 = Compare mode: clear output on compare match (set CCPxIF)
1000 = Compare mode: set output on compare match (set CCPxIF)
0111 =
0110 =
0101 =
0100 =
Capture mode: every 16th rising edge
Capture mode: every 4th rising edge
Capture mode: every rising edge
Capture mode: every falling edge
0011 =
0010 =
0001 =
0000 =
Reserved
Compare mode: toggle output on match
Reserved
Capture/Compare/PWM off (resets CCPx module)
 2013-2015 Microchip Technology Inc.
DS40001722C-page 193
PIC16(L)F1703/7
23.0
MASTER SYNCHRONOUS
SERIAL PORT (MSSP)
MODULE
23.1
MSSP Module Overview
The Master Synchronous Serial Port (MSSP) module is
a serial interface useful for communicating with other
peripheral or microcontroller devices. These peripheral
devices may be serial EEPROMs, shift registers,
display drivers, ADC converters, etc. The MSSP
module can operate in one of two modes:
• Serial Peripheral Interface (SPI)
• Inter-Integrated Circuit (I2C)
The SPI interface supports the following modes and
features:
•
•
•
•
•
Master mode
Slave mode
Clock Parity
Slave Select Synchronization (Slave mode only)
Daisy-chain connection of slave devices
Figure 23-1 is a block diagram of the SPI interface
module.
FIGURE 23-1:
MSSP BLOCK DIAGRAM (SPI MODE)
Data Bus
Read
Write
SSPxBUF Reg
SDI
SSPSR Reg
SDO
bit 0
SS
SS Control
Enable
Shift
Clock
2 (CKP, CKE)
Clock Select
Edge
Select
SSPM<3:0>
4
SCK
Edge
Select
TRIS bit
DS40001722C-page 194
(
T2_match
2
)
Prescaler TOSC
4, 16, 64
Baud Rate
Generator
(SSPxADD)
 2013-2015 Microchip Technology Inc.
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The I2C interface supports the following modes and
features:
•
•
•
•
•
•
•
•
•
•
•
•
•
Master mode
Slave mode
Byte NACKing (Slave mode)
Limited multi-master support
7-bit and 10-bit addressing
Start and Stop interrupts
Interrupt masking
Clock stretching
Bus collision detection
General call address matching
Address masking
Address Hold and Data Hold modes
Selectable SDA hold times
Figure 23-2 is a block diagram of the I2C interface
module in Master mode. Figure 23-3 is a diagram of the
I2C interface module in Slave mode.
MSSP BLOCK DIAGRAM (I2C MASTER MODE)
Internal
data bus
Read
[SSPM<3:0>]
Write
SSP1BUF
Shift
Clock
SDA in
Receive Enable (RCEN)
SCL
SCL in
Bus Collision
 2013-2015 Microchip Technology Inc.
LSb
Start bit, Stop bit,
Acknowledge
Generate (SSPCON2)
Start bit detect,
Stop bit detect
Write collision detect
Clock arbitration
State counter for
end of XMIT/RCV
Address Match detect
Clock Cntl
SSPSR
MSb
(Hold off clock source)
SDA
Baud Rate
Generator
(SSPxADD)
Clock arbitrate/BCOL detect
FIGURE 23-2:
Set/Reset: S, P, SSPxSTAT, WCOL, SSPOV
Reset SEN, PEN (SSPCON2)
Set SSP1IF, BCL1IF
DS40001722C-page 195
PIC16(L)F1703/7
FIGURE 23-3:
MSSP BLOCK DIAGRAM (I2C SLAVE MODE)
Internal
Data Bus
Read
Write
SSPxBUF Reg
SCL
Shift
Clock
SSPSR Reg
SDA
MSb
LSb
SSPMSK Reg
Match Detect
Addr Match
SSPxADD Reg
Start and
Stop bit Detect
DS40001722C-page 196
Set, Reset
S, P bits
(SSPxSTAT Reg)
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.2
SPI Mode Overview
The Serial Peripheral Interface (SPI) bus is a
synchronous serial data communication bus that
operates in Full-Duplex mode. Devices communicate
in a master/slave environment where the master device
initiates the communication. A slave device is
controlled through a Chip Select known as Slave
Select.
The SPI bus specifies four signal connections:
•
•
•
•
Serial Clock (SCK)
Serial Data Out (SDO)
Serial Data In (SDI)
Slave Select (SS)
Figure 23-1 shows the block diagram of the MSSP
module when operating in SPI mode.
The SPI bus operates with a single master device and
one or more slave devices. When multiple slave
devices are used, an independent Slave Select
connection is required from the master device to each
slave device.
Figure 23-4 shows a typical connection between a
master device and multiple slave devices.
The master selects only one slave at a time. Most slave
devices have tri-state outputs so their output signal
appears disconnected from the bus when they are not
selected.
Transmissions involve two shift registers, eight bits in
size, one in the master and one in the slave. With either
the master or the slave device, data is always shifted
out one bit at a time, with the Most Significant bit (MSb)
shifted out first. At the same time, a new Least
Significant bit (LSb) is shifted into the same register.
During each SPI clock cycle, a full-duplex data
transmission occurs. This means that while the master
device is sending out the MSb from its shift register (on
its SDO pin) and the slave device is reading this bit and
saving it as the LSb of its shift register, that the slave
device is also sending out the MSb from its shift register
(on its SDO pin) and the master device is reading this
bit and saving it as the LSb of its shift register.
After eight bits have been shifted out, the master and
slave have exchanged register values.
If there is more data to exchange, the shift registers are
loaded with new data and the process repeats itself.
Whether the data is meaningful or not (dummy data),
depends on the application software. This leads to
three scenarios for data transmission:
• Master sends useful data and slave sends dummy
data.
• Master sends useful data and slave sends useful
data.
• Master sends dummy data and slave sends useful
data.
Transmissions may involve any number of clock
cycles. When there is no more data to be transmitted,
the master stops sending the clock signal and it
deselects the slave.
Every slave device connected to the bus that has not
been selected through its slave select line must disregard the clock and transmission signals and must not
transmit out any data of its own.
Figure 23-5 shows a typical connection between two
processors configured as master and slave devices.
Data is shifted out of both shift registers on the
programmed clock edge and latched on the opposite
edge of the clock.
The master device transmits information out on its SDO
output pin which is connected to, and received by, the
slave’s SDI input pin. The slave device transmits information out on its SDO output pin, which is connected
to, and received by, the master’s SDI input pin.
To begin communication, the master device first sends
out the clock signal. Both the master and the slave
devices should be configured for the same clock polarity.
The master device starts a transmission by sending out
the MSb from its shift register. The slave device reads
this bit from that same line and saves it into the LSb
position of its shift register.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
FIGURE 23-4:
SPI MASTER AND MULTIPLE SLAVE CONNECTION
SPI Master
SCK
SCK
SDO
SDI
SDI
SDO
General I/O
General I/O
SS
General I/O
SCK
SDI
SDO
SPI Slave
#1
SPI Slave
#2
SS
SCK
SDI
SDO
SPI Slave
#3
SS
23.2.1
SPI MODE REGISTERS
The MSSP module has five registers for SPI mode
operation. These are:
•
•
•
•
•
•
MSSP STATUS register (SSPxSTAT)
MSSP Control register 1 (SSPxCON1)
MSSP Control register 3 (SSPxCON3)
MSSP Data Buffer register (SSPxBUF)
MSSP Address register (SSPxADD)
MSSP Shift register (SSPSR)
(Not directly accessible)
SSPxCON1 and SSPxSTAT are the control
STATUS registers in SPI mode operation.
SSPxCON1 register is readable and writable.
lower six bits of the SSPxSTAT are read-only.
upper two bits of the SSPxSTAT are read/write.
and
The
The
The
In one SPI master mode, SSPxADD can be loaded
with a value used in the Baud Rate Generator. More
information on the Baud Rate Generator is available in
Section 23.7 “Baud Rate Generator”.
SSPSR is the shift register used for shifting data in and
out. SSPxBUF provides indirect access to the SSPSR
register. SSPxBUF is the buffer register to which data
bytes are written, and from which data bytes are read.
In receive operations, SSPSR and SSPxBUF together
create a buffered receiver. When SSPSR receives a
complete byte, it is transferred to SSPxBUF and the
SSPIF interrupt is set.
During transmission, the SSPxBUF is not buffered. A
write to SSPxBUF will write to both SSPxBUF and
SSPSR.
DS40001722C-page 198
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23.2.2
SPI MODE OPERATION
When initializing the SPI, several options need to be
specified. This is done by programming the appropriate
control bits (SSPxCON1<5:0> and SSPxSTAT<7:6>).
These control bits allow the following to be specified:
•
•
•
•
Master mode (SCK is the clock output)
Slave mode (SCK is the clock input)
Clock Polarity (Idle state of SCK)
Data Input Sample Phase (middle or end of data
output time)
• Clock Edge (output data on rising/falling edge of
SCK)
• Clock Rate (Master mode only)
• Slave Select mode (Slave mode only)
To enable the serial port, SSP Enable bit, SSPEN of the
SSPxCON1 register, must be set. To reset or reconfigure SPI mode, clear the SSPEN bit, re-initialize the
SSPCONx registers and then set the SSPEN bit. This
configures the SDI, SDO, SCK and SS pins as serial
port pins. For the pins to behave as the serial port
function, some must have their data direction bits (in
the TRIS register) appropriately programmed as
follows:
• SDI must have corresponding TRIS bit set
• SDO must have corresponding TRIS bit cleared
• SCK (Master mode) must have corresponding
TRIS bit cleared
• SCK (Slave mode) must have corresponding
TRIS bit set
• SS must have corresponding TRIS bit set
Any serial port function that is not desired may be
overridden by programming the corresponding data
direction (TRIS) register to the opposite value.
The MSSP consists of a transmit/receive shift register
(SSPSR) and a buffer register (SSPxBUF). The
SSPSR shifts the data in and out of the device, MSb
first. The SSPxBUF holds the data that was written to
the SSPSR until the received data is ready. Once the
eight bits of data have been received, that byte is
moved to the SSPxBUF register. Then, the Buffer Full
Detect bit, BF of the SSPxSTAT register, and the interrupt flag bit, SSPIF, are set. This double-buffering of the
received data (SSPxBUF) allows the next byte to start
reception before reading the data that was just
received. Any write to the SSPxBUF register during
transmission/reception of data will be ignored and the
write collision detect bit WCOL of the SSPxCON1 register, will be set. User software must clear the WCOL bit
to allow the following write(s) to the SSPxBUF register
to complete successfully.
When the application software is expecting to receive
valid data, the SSPxBUF should be read before the
next byte of data to transfer is written to the SSPxBUF.
The Buffer Full bit, BF of the SSPxSTAT register,
indicates when SSPxBUF has been loaded with the
received data (transmission is complete). When the
SSPxBUF is read, the BF bit is cleared. This data may
be irrelevant if the SPI is only a transmitter. Generally,
the MSSP interrupt is used to determine when the
transmission/reception has completed. If the interrupt
method is not going to be used, then software polling
can be done to ensure that a write collision does not
occur.
The SSPSR is not directly readable or writable and can
only be accessed by addressing the SSPxBUF register.
Additionally, the SSPxSTAT register indicates the
various Status conditions.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
FIGURE 23-5:
SPI MASTER/SLAVE CONNECTION
SPI Master SSPM<3:0> = 00xx
= 1010
SPI Slave SSPM<3:0> = 010x
SDO
SDI
Serial Input Buffer
(BUF)
SDI
Shift Register
(SSPSR)
MSb
Serial Input Buffer
(SSPxBUF)
LSb
SCK
General I/O
Processor 1
DS40001722C-page 200
SDO
Serial Clock
Slave Select
(optional)
Shift Register
(SSPSR)
MSb
LSb
SCK
SS
Processor 2
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.2.3
SPI MASTER MODE
The master can initiate the data transfer at any time
because it controls the SCK line. The master
determines when the slave (Processor 2, Figure 23-5)
is to broadcast data by the software protocol.
In Master mode, the data is transmitted/received as
soon as the SSPxBUF register is written to. If the SPI
is only going to receive, the SDO output could be
disabled (programmed as an input). The SSPSR
register will continue to shift in the signal present on the
SDI pin at the programmed clock rate. As each byte is
received, it will be loaded into the SSPxBUF register as
if a normal received byte (interrupts and Status bits
appropriately set).
The clock polarity is selected by appropriately
programming the CKP bit of the SSPxCON1 register
and the CKE bit of the SSPxSTAT register. This then,
would give waveforms for SPI communication as
shown in Figure 23-6, Figure 23-8, Figure 23-9 and
Figure 23-10, where the MSB is transmitted first. In
Master mode, the SPI clock rate (bit rate) is user
programmable to be one of the following:
FIGURE 23-6:
•
•
•
•
•
FOSC/4 (or TCY)
FOSC/16 (or 4 * TCY)
FOSC/64 (or 16 * TCY)
Timer2 output/2
FOSC/(4 * (SSPxADD + 1))
Figure 23-6 shows the waveforms for Master mode.
When the CKE bit is set, the SDO data is valid before
there is a clock edge on SCK. The change of the input
sample is shown based on the state of the SMP bit. The
time when the SSPxBUF is loaded with the received
data is shown.
Note:
In Master mode, the clock signal output to
the SCK pin is also the clock signal input
to the peripheral. The pin selected for output with the RxyPPS register must also be
selected as the peripheral input with the
SSPCLKPPS register.
SPI MODE WAVEFORM (MASTER MODE)
Write to
SSPxBUF
SCK
(CKP = 0
CKE = 0)
SCK
(CKP = 1
CKE = 0)
4 Clock
Modes
SCK
(CKP = 0
CKE = 1)
SCK
(CKP = 1
CKE = 1)
SDO
(CKE = 0)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SDO
(CKE = 1)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SDI
(SMP = 0)
bit 0
bit 7
Input
Sample
(SMP = 0)
SDI
(SMP = 1)
bit 7
bit 0
Input
Sample
(SMP = 1)
SSPIF
SSPSR to
SSPxBUF
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PIC16(L)F1703/7
23.2.4
SPI SLAVE MODE
In Slave mode, the data is transmitted and received as
external clock pulses appear on SCK. When the last
bit is latched, the SSPIF interrupt flag bit is set.
Before enabling the module in SPI Slave mode, the clock
line must match the proper Idle state. The clock line can
be observed by reading the SCK pin. The Idle state is
determined by the CKP bit of the SSPxCON1 register.
While in Slave mode, the external clock is supplied by
the external clock source on the SCK pin. This external
clock must meet the minimum high and low times as
specified in the electrical specifications.
While in Sleep mode, the slave can transmit/receive
data. The shift register is clocked from the SCK pin
input and when a byte is received, the device will
generate an interrupt. If enabled, the device will
wake-up from Sleep.
23.2.4.1
Daisy-Chain Configuration
The SPI bus can sometimes be connected in a
daisy-chain configuration. The first slave output is
connected to the second slave input, the second slave
output is connected to the third slave input, and so on.
The final slave output is connected to the master input.
Each slave sends out, during a second group of clock
pulses, an exact copy of what was received during the
first group of clock pulses. The whole chain acts as
one large communication shift register. The
daisy-chain feature only requires a single Slave Select
line from the master device.
Figure 23-7 shows the block diagram of a typical
daisy-chain connection when operating in SPI mode.
In a daisy-chain configuration, only the most recent
byte on the bus is required by the slave. Setting the
BOEN bit of the SSPxCON3 register will enable writes
to the SSPxBUF register, even if the previous byte has
not been read. This allows the software to ignore data
that may not apply to it.
23.2.5
SLAVE SELECT
SYNCHRONIZATION
The Slave Select can also be used to synchronize
communication. The Slave Select line is held high until
the master device is ready to communicate. When the
Slave Select line is pulled low, the slave knows that a
new transmission is starting.
If the slave fails to receive the communication properly,
it will be reset at the end of the transmission, when the
Slave Select line returns to a high state. The slave is
then ready to receive a new transmission when the
Slave Select line is pulled low again. If the Slave Select
line is not used, there is a risk that the slave will
eventually become out of sync with the master. If the
slave misses a bit, it will always be one bit off in future
transmissions. Use of the Slave Select line allows the
slave and master to align themselves at the beginning
of each transmission.
The SS pin allows a Synchronous Slave mode. The
SPI must be in Slave mode with SS pin control enabled
(SSPxCON1<3:0> = 0100).
When the SS pin is low, transmission and reception are
enabled and the SDO pin is driven.
When the SS pin goes high, the SDO pin is no longer
driven, even if in the middle of a transmitted byte and
becomes a floating output. External pull-up/pull-down
resistors may be desirable depending on the application.
Note 1: When the SPI is in Slave mode with SS pin
control enabled (SSPxCON1<3:0> =
0100), the SPI module will reset if the SS
pin is set to VDD.
2: When the SPI is used in Slave mode with
CKE set; the user must enable SS pin
control.
3: While operated in SPI Slave mode the
SMP bit of the SSPxSTAT register must
remain clear.
When the SPI module resets, the bit counter is forced
to ‘0’. This can be done by either forcing the SS pin to
a high level or clearing the SSPEN bit.
DS40001722C-page 202
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 23-7:
SPI DAISY-CHAIN CONNECTION
SPI Master
SCK
SCK
SDO
SDI
SDI
SPI Slave
#1
SDO
General I/O
SS
SCK
SDI
SPI Slave
#2
SDO
SS
SCK
SDI
SPI Slave
#3
SDO
SS
FIGURE 23-8:
SLAVE SELECT SYNCHRONOUS WAVEFORM
SS
SCK
(CKP = 0
CKE = 0)
SCK
(CKP = 1
CKE = 0)
Write to
SSPxBUF
Shift register SSPSR
and bit count are reset
SSPxBUF to
SSPSR
SDO
bit 7
bit 6
bit 7
SDI
bit 6
bit 0
bit 0
bit 7
bit 7
Input
Sample
SSPIF
Interrupt
Flag
SSPSR to
SSPxBUF
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PIC16(L)F1703/7
FIGURE 23-9:
SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 0)
SS
Optional
SCK
(CKP = 0
CKE = 0)
SCK
(CKP = 1
CKE = 0)
Write to
SSPxBUF
Valid
SDO
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SDI
bit 0
bit 7
Input
Sample
SSPIF
Interrupt
Flag
SSPSR to
SSPxBUF
Write Collision
detection active
FIGURE 23-10:
SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 1)
SS
Not Optional
SCK
(CKP = 0
CKE = 1)
SCK
(CKP = 1
CKE = 1)
Write to
SSPxBUF
Valid
SDO
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SDI
bit 7
bit 0
Input
Sample
SSPIF
Interrupt
Flag
SSPSR to
SSPxBUF
Write Collision
detection active
DS40001722C-page 204
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.2.6
SPI OPERATION IN SLEEP MODE
In SPI Master mode, when the Sleep mode is selected,
all module clocks are halted and the transmission/reception will remain in that state until the device
wakes. After the device returns to Run mode, the
module will resume transmitting and receiving data.
In SPI Master mode, module clocks may be operating
at a different speed than when in Full-Power mode; in
the case of the Sleep mode, all clocks are halted.
Special care must be taken by the user when the MSSP
clock is much faster than the system clock.
In SPI Slave mode, the SPI Transmit/Receive Shift
register operates asynchronously to the device. This
allows the device to be placed in Sleep mode and data
to be shifted into the SPI Transmit/Receive Shift
register. When all eight bits have been received, the
MSSP interrupt flag bit will be set and if enabled, will
wake the device.
In Slave mode, when MSSP interrupts are enabled,
after the master completes sending data, an MSSP
interrupt will wake the controller from Sleep.
If an exit from Sleep mode is not desired, MSSP
interrupts should be disabled.
TABLE 23-1:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH SPI OPERATION
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
ANSELA
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
114
ANSELC
ANSC7(2)
ANSC6(2)
ANSC5(3)
ANSC4(3)
ANSC3
ANSC2
ANSC1
ANSC0
125
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
PIE1
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
PIR1
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
INTCON
TMR1GIF
ADIF
—
RxyPPS
—
—
—
RxyPPS<4:0>
132
SSPCLKPPS
—
—
—
SSPCLKPPS<4:0>
130, 131
SSPDATPPS
—
—
—
SSPDATPPS<4:0>
130, 131
SSPSSPPS
—
—
—
SSPSSPPS<4:0>
130, 131
SSP1BUF
BUF<7:0>
198*
SSP1CON1
WCOL
SSPOV
SSPEN
CKP
SSP1CON3
ACKTIM
PCIE
SCIE
BOEN
SSP1STAT
SMP
CKE
D/A
P
S
R/W
—
—
TRISA5
TRISA4
—(1)
TRISA2
TRISB7
TRISB6
TRISB5
TRISB4
—
—
TRISC7(2)
TRISC6(2)
TRISC5
TRISC4
TRISC3
TRISC2
TRISA
TRISB(2)
TRISC
Legend:
*
Note 1:
2:
3:
81
SSPM<3:0>
SDAHT
SBCDE
244
AHEN
DHEN
246
UA
BF
242
TRISA1
TRISA0
113
—
—
119
TRISC1
TRISC0
124
— = Unimplemented location, read as ‘0’. Shaded cells are not used by the MSSP in SPI mode.
Page provides register information.
Unimplemented, read as ‘1’.
PIC16(L)F1707 only.
PIC16(L)F1703 only.
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PIC16(L)F1703/7
23.3
I2C MODE OVERVIEW
The Inter-Integrated Circuit (I2C) bus is a multi-master
serial data communication bus. Devices communicate
in a master/slave environment where the master
devices initiate the communication. A slave device is
controlled through addressing.
VDD
SCL
The I2C bus specifies two signal connections:
• Serial Clock (SCL)
• Serial Data (SDA)
Figure 23-11 shows the block diagram of the MSSP
module when operating in I2C mode.
Both the SCL and SDA connections are bidirectional
open-drain lines, each requiring pull-up resistors for the
supply voltage. Pulling the line to ground is considered
a logical zero and letting the line float is considered a
logical one.
Figure 23-11 shows a typical connection between two
processors configured as master and slave devices.
The I2C bus can operate with one or more master
devices and one or more slave devices.
There are four potential modes of operation for a given
device:
• Master Transmit mode
(master is transmitting data to a slave)
• Master Receive mode
(master is receiving data from a slave)
• Slave Transmit mode
(slave is transmitting data to a master)
• Slave Receive mode
(slave is receiving data from the master)
To begin communication, a master device starts out in
Master Transmit mode. The master device sends out a
Start bit followed by the address byte of the slave it
intends to communicate with. This is followed by a
single Read/Write bit, which determines whether the
master intends to transmit to or receive data from the
slave device.
If the requested slave exists on the bus, it will respond
with an Acknowledge bit, otherwise known as an ACK.
The master then continues in either Transmit mode or
Receive mode and the slave continues in the complement, either in Receive mode or Transmit mode,
respectively.
A Start bit is indicated by a high-to-low transition of the
SDA line while the SCL line is held high. Address and
data bytes are sent out, Most Significant bit (MSb) first.
The Read/Write bit is sent out as a logical one when the
master intends to read data from the slave, and is sent
out as a logical zero when it intends to write data to the
slave.
DS40001722C-page 206
I2C MASTER/
SLAVE CONNECTION
FIGURE 23-11:
SCL
VDD
Master
Slave
SDA
SDA
The Acknowledge bit (ACK) is an active-low signal,
which holds the SDA line low to indicate to the transmitter that the slave device has received the transmitted
data and is ready to receive more.
The transition of a data bit is always performed while
the SCL line is held low. Transitions that occur while the
SCL line is held high are used to indicate Start and Stop
bits.
If the master intends to write to the slave, then it repeatedly sends out a byte of data, with the slave responding
after each byte with an ACK bit. In this example, the
master device is in Master Transmit mode and the
slave is in Slave Receive mode.
If the master intends to read from the slave, then it
repeatedly receives a byte of data from the slave, and
responds after each byte with an ACK bit. In this example, the master device is in Master Receive mode and
the slave is Slave Transmit mode.
On the last byte of data communicated, the master
device may end the transmission by sending a Stop bit.
If the master device is in Receive mode, it sends the
Stop bit in place of the last ACK bit. A Stop bit is
indicated by a low-to-high transition of the SDA line
while the SCL line is held high.
In some cases, the master may want to maintain
control of the bus and re-initiate another transmission.
If so, the master device may send another Start bit in
place of the Stop bit or last ACK bit when it is in receive
mode.
The I2C bus specifies three message protocols;
• Single message where a master writes data to a
slave.
• Single message where a master reads data from
a slave.
• Combined message where a master initiates a
minimum of two writes, or two reads, or a
combination of writes and reads, to one or more
slaves.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
When one device is transmitting a logical one, or letting
the line float, and a second device is transmitting a logical zero, or holding the line low, the first device can
detect that the line is not a logical one. This detection,
when used on the SCL line, is called clock stretching.
Clock stretching gives slave devices a mechanism to
control the flow of data. When this detection is used on
the SDA line, it is called arbitration. Arbitration ensures
that there is only one master device communicating at
any single time.
23.3.1
CLOCK STRETCHING
When a slave device has not completed processing
data, it can delay the transfer of more data through the
process of clock stretching. An addressed slave device
may hold the SCL clock line low after receiving or sending a bit, indicating that it is not yet ready to continue.
The master that is communicating with the slave will
attempt to raise the SCL line in order to transfer the
next bit, but will detect that the clock line has not yet
been released. Because the SCL connection is
open-drain, the slave has the ability to hold that line low
until it is ready to continue communicating.
Clock stretching allows receivers that cannot keep up
with a transmitter to control the flow of incoming data.
23.3.2
ARBITRATION
Each master device must monitor the bus for Start and
Stop bits. If the device detects that the bus is busy, it
cannot begin a new message until the bus returns to an
Idle state.
However, two master devices may try to initiate a transmission on or about the same time. When this occurs,
the process of arbitration begins. Each transmitter
checks the level of the SDA data line and compares it
to the level that it expects to find. The first transmitter to
observe that the two levels do not match, loses arbitration, and must stop transmitting on the SDA line.
For example, if one transmitter holds the SDA line to a
logical one (lets it float) and a second transmitter holds
it to a logical zero (pulls it low), the result is that the
SDA line will be low. The first transmitter then observes
that the level of the line is different than expected and
concludes that another transmitter is communicating.
The first transmitter to notice this difference is the one
that loses arbitration and must stop driving the SDA
line. If this transmitter is also a master device, it also
must stop driving the SCL line. It then can monitor the
lines for a Stop condition before trying to reissue its
transmission. In the meantime, the other device that
has not noticed any difference between the expected
and actual levels on the SDA line continues with its
original transmission. It can do so without any complications, because so far, the transmission appears
exactly as expected with no other transmitter disturbing
the message.
Slave Transmit mode can also be arbitrated, when a
master addresses multiple slaves, but this is less
common.
If two master devices are sending a message to two
different slave devices at the address stage, the master
sending the lower slave address always wins arbitration. When two master devices send messages to the
same slave address, and addresses can sometimes
refer to multiple slaves, the arbitration process must
continue into the data stage.
Arbitration usually occurs very rarely, but it is a
necessary process for proper multi-master support.
 2013-2015 Microchip Technology Inc.
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PIC16(L)F1703/7
23.4
I2C MODE OPERATION
All MSSP I2C communication is byte oriented and
shifted out MSb first. Six SFR registers and two
interrupt flags interface the module with the PIC®
microcontroller and user software. Two pins, SDA and
SCL, are exercised by the module to communicate
with other external I2C devices.
23.4.1
BYTE FORMAT
All communication in I2C is done in 9-bit segments. A
byte is sent from a master to a slave or vice-versa, followed by an Acknowledge bit sent back. After the
eighth falling edge of the SCL line, the device outputting data on the SDA changes that pin to an input and
reads in an acknowledge value on the next clock
pulse.
The clock signal, SCL, is provided by the master. Data
is valid to change while the SCL signal is low, and
sampled on the rising edge of the clock. Changes on
the SDA line while the SCL line is high define special
conditions on the bus, explained below.
23.4.2
DEFINITION OF I2C TERMINOLOGY
There is language and terminology in the description
of I2C communication that have definitions specific to
I2C. That word usage is defined below and may be
used in the rest of this document without explanation.
This table was adapted from the Philips I2C
specification.
23.4.3
SDA AND SCL PINS
Selection of any I2C mode with the SSPEN bit set,
forces the SCL and SDA pins to be open-drain. These
pins should be set by the user to inputs by setting the
appropriate TRIS bits.
Note 1: Data is tied to output zero when an I2C
mode is enabled.
2: Any device pin can be selected for SDA
and SCL functions with the PPS peripheral.
These functions are bidirectional. The SDA
input is selected with the SSPDATPPS
registers. The SCL input is selected with
the SSPCLKPPS registers. Outputs are
selected with the RxyPPS registers. It is the
user’s responsibility to make the selections
so that both the input and the output for
each function is on the same pin.
23.4.4
TABLE 23-2:
TERM
I2C BUS TERMS
Description
Transmitter
The device which shifts data out
onto the bus.
Receiver
The device which shifts data in
from the bus.
Master
The device that initiates a transfer,
generates clock signals and terminates a transfer.
Slave
The device addressed by the
master.
Multi-master
A bus with more than one device
that can initiate data transfers.
Arbitration
Procedure to ensure that only one
master at a time controls the bus.
Winning arbitration ensures that
the message is not corrupted.
Synchronization Procedure to synchronize the
clocks of two or more devices on
the bus.
Idle
No master is controlling the bus,
and both SDA and SCL lines are
high.
Active
Any time one or more master
devices are controlling the bus.
Slave device that has received a
Addressed
Slave
matching address and is actively
being clocked by a master.
Matching
Address byte that is clocked into a
Address
slave that matches the value
stored in SSPxADD.
Write Request
Slave receives a matching
address with R/W bit clear, and is
ready to clock in data.
Read Request
Master sends an address byte with
the R/W bit set, indicating that it
wishes to clock data out of the
Slave. This data is the next and all
following bytes until a Restart or
Stop.
Clock Stretching When a device on the bus hold
SCL low to stall communication.
Bus Collision
Any time the SDA line is sampled
low by the module while it is outputting and expected high state.
SDA HOLD TIME
The hold time of the SDA pin is selected by the SDAHT
bit of the SSPxCON3 register. Hold time is the time
SDA is held valid after the falling edge of SCL. Setting
the SDAHT bit selects a longer 300 ns minimum hold
time and may help on buses with large capacitance.
DS40001722C-page 208
 2013-2015 Microchip Technology Inc.
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23.4.5
23.4.7
START CONDITION
The I2C specification defines a Start condition as a
transition of SDA from a high to a low state while SCL
line is high. A Start condition is always generated by
the master and signifies the transition of the bus from
an Idle to an Active state. Figure 23-12 shows wave
forms for Start and Stop conditions.
A Restart is valid any time that a Stop would be valid.
A master can issue a Restart if it wishes to hold the
bus after terminating the current transfer. A Restart
has the same effect on the slave that a Start would,
resetting all slave logic and preparing it to clock in an
address. The master may want to address the same or
another slave. Figure 23-13 shows the wave form for a
Restart condition.
A bus collision can occur on a Start condition if the
module samples the SDA line low before asserting it
low. This does not conform to the I2C Specification that
states no bus collision can occur on a Start.
23.4.6
RESTART CONDITION
In 10-bit Addressing Slave mode a Restart is required
for the master to clock data out of the addressed
slave. Once a slave has been fully addressed, matching both high and low address bytes, the master can
issue a Restart and the high address byte with the
R/W bit set. The slave logic will then hold the clock
and prepare to clock out data.
STOP CONDITION
A Stop condition is a transition of the SDA line from
low-to-high state while the SCL line is high.
Note: At least one SCL low time must appear
before a Stop is valid, therefore, if the SDA
line goes low then high again while the SCL
line stays high, only the Start condition is
detected.
After a full match with R/W clear in 10-bit mode, a prior
match flag is set and maintained until a Stop condition, a
high address with R/W clear, or high address match fails.
23.4.8
START/STOP CONDITION INTERRUPT
MASKING
The SCIE and PCIE bits of the SSPxCON3 register
can enable the generation of an interrupt in Slave
modes that do not typically support this function. Slave
modes where interrupt on Start and Stop detect are
already enabled, these bits will have no effect.
FIGURE 23-12:
I2C START AND STOP CONDITIONS
SDA
SCL
S
Start
P
Change of
Change of
Data Allowed
Data Allowed
Condition
FIGURE 23-13:
Stop
Condition
I2C RESTART CONDITION
Sr
Change of
Change of
Data Allowed
Restart
Data Allowed
Condition
 2013-2015 Microchip Technology Inc.
DS40001722C-page 209
PIC16(L)F1703/7
23.4.9
ACKNOWLEDGE SEQUENCE
The ninth SCL pulse for any transferred byte in I2C is
dedicated as an Acknowledge. It allows receiving
devices to respond back to the transmitter by pulling
the SDA line low. The transmitter must release control
of the line during this time to shift in the response. The
Acknowledge (ACK) is an active-low signal, pulling the
SDA line low indicates to the transmitter that the
device has received the transmitted data and is ready
to receive more.
The result of an ACK is placed in the ACKSTAT bit of
the SSPCON2 register.
Slave software, when the AHEN and DHEN bits are
set, allow the user to set the ACK value sent back to
the transmitter. The ACKDT bit of the SSPCON2 register is set/cleared to determine the response.
Slave hardware will generate an ACK response if the
AHEN and DHEN bits of the SSPxCON3 register are
clear.
There are certain conditions where an ACK will not be
sent by the slave. If the BF bit of the SSPxSTAT register or the SSPOV bit of the SSPxCON1 register are
set when a byte is received.
When the module is addressed, after the eighth falling
edge of SCL on the bus, the ACKTIM bit of the
SSPxCON3 register is set. The ACKTIM bit indicates
the acknowledge time of the active bus. The ACKTIM
Status bit is only active when the AHEN bit or DHEN
bit is enabled.
23.5
I2C SLAVE MODE OPERATION
The MSSP Slave mode operates in one of four modes
selected by the SSPM bits of SSPxCON1 register. The
modes can be divided into 7-bit and 10-bit Addressing
mode. 10-bit Addressing modes operate the same as
7-bit with some additional overhead for handling the
larger addresses.
Modes with Start and Stop bit interrupts operate the
same as the other modes with SSPIF additionally
getting set upon detection of a Start, Restart, or Stop
condition.
23.5.1
SLAVE MODE ADDRESSES
The SSPxADD register (Register 23-6) contains the
Slave mode address. The first byte received after a
Start or Restart condition is compared against the
value stored in this register. If the byte matches, the
value is loaded into the SSPxBUF register and an
interrupt is generated. If the value does not match, the
module goes idle and no indication is given to the
software that anything happened.
The SSP Mask register (Register 23-5) affects the
address matching process. See Section 23.5.9 “SSP
Mask Register” for more information.
23.5.1.1
I2C Slave 7-bit Addressing Mode
In 7-bit Addressing mode, the LSb of the received data
byte is ignored when determining if there is an address
match.
23.5.1.2
I2C Slave 10-bit Addressing Mode
In 10-bit Addressing mode, the first received byte is
compared to the binary value of ‘1 1 1 1 0 A9 A8 0’. A9
and A8 are the two MSb’s of the 10-bit address and
stored in bits 2 and 1 of the SSPxADD register.
After the acknowledge of the high byte the UA bit is set
and SCL is held low until the user updates SSPxADD
with the low address. The low address byte is clocked
in and all eight bits are compared to the low address
value in SSPxADD. Even if there is not an address
match; SSPIF and UA are set, and SCL is held low
until SSPxADD is updated to receive a high byte
again. When SSPxADD is updated the UA bit is
cleared. This ensures the module is ready to receive
the high address byte on the next communication.
A high and low address match as a write request is
required at the start of all 10-bit addressing communication. A transmission can be initiated by issuing a
Restart once the slave is addressed, and clocking in
the high address with the R/W bit set. The slave
hardware will then acknowledge the read request and
prepare to clock out data. This is only valid for a slave
after it has received a complete high and low address
byte match.
DS40001722C-page 210
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.5.2
SLAVE RECEPTION
When the R/W bit of a matching received address byte
is clear, the R/W bit of the SSPxSTAT register is
cleared. The received address is loaded into the
SSPxBUF register and acknowledged.
When the overflow condition exists for a received
address, then not Acknowledge is given. An overflow
condition is defined as either bit BF of the SSPxSTAT
register is set, or bit SSPOV of the SSPxCON1 register
is set. The BOEN bit of the SSPxCON3 register modifies this operation. For more information see
Register 23-4.
An MSSP interrupt is generated for each transferred
data byte. Flag bit, SSPIF, must be cleared by software.
When the SEN bit of the SSPCON2 register is set, SCL
will be held low (clock stretch) following each received
byte. The clock must be released by setting the CKP
bit of the SSPxCON1 register, except sometimes in
10-bit
mode.
See
Section 23.5.6.2
“10-bit
Addressing Mode” for more detail.
23.5.2.1
7-bit Addressing Reception
This section describes a standard sequence of events
for the MSSP module configured as an I2C slave in
7-bit Addressing mode. Figure 23-14 and Figure 23-15
is used as a visual reference for this description.
This is a step by step process of what typically must
be done to accomplish I2C communication.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Start bit detected.
S bit of SSPxSTAT is set; SSPIF is set if interrupt
on Start detect is enabled.
Matching address with R/W bit clear is received.
The slave pulls SDA low sending an ACK to the
master, and sets SSPIF bit.
Software clears the SSPIF bit.
Software reads received address from
SSPxBUF clearing the BF flag.
If SEN = 1; Slave software sets CKP bit to
release the SCL line.
The master clocks out a data byte.
Slave drives SDA low sending an ACK to the
master, and sets SSPIF bit.
Software clears SSPIF.
Software reads the received byte from
SSPxBUF clearing BF.
Steps 8-12 are repeated for all received bytes
from the master.
Master sends Stop condition, setting P bit of
SSPxSTAT, and the bus goes idle.
 2013-2015 Microchip Technology Inc.
23.5.2.2
7-bit Reception with AHEN and DHEN
Slave device reception with AHEN and DHEN set
operate the same as without these options with extra
interrupts and clock stretching added after the eighth
falling edge of SCL. These additional interrupts allow
the slave software to decide whether it wants to ACK
the receive address or data byte, rather than the hardware. This functionality adds support for PMBus™ that
was not present on previous versions of this module.
This list describes the steps that need to be taken by
slave software to use these options for I2C communication. Figure 23-16 displays a module using both
address and data holding. Figure 23-17 includes the
operation with the SEN bit of the SSPCON2 register
set.
1.
S bit of SSPxSTAT is set; SSPIF is set if interrupt
on Start detect is enabled.
2. Matching address with R/W bit clear is clocked
in. SSPIF is set and CKP cleared after the eighth
falling edge of SCL.
3. Slave clears the SSPIF.
4. Slave can look at the ACKTIM bit of the
SSPxCON3 register to determine if the SSPIF
was after or before the ACK.
5. Slave reads the address value from SSPxBUF,
clearing the BF flag.
6. Slave sets ACK value clocked out to the master
by setting ACKDT.
7. Slave releases the clock by setting CKP.
8. SSPIF is set after an ACK, not after a NACK.
9. If SEN = 1 the slave hardware will stretch the
clock after the ACK.
10. Slave clears SSPIF.
Note: SSPIF is still set after the ninth falling edge
of SCL even if there is no clock stretching
and BF has been cleared. Only if NACK is
sent to master is SSPIF not set
11. SSPIF set and CKP cleared after eighth falling
edge of SCL for a received data byte.
12. Slave looks at ACKTIM bit of SSPxCON3 to
determine the source of the interrupt.
13. Slave reads the received data from SSPxBUF
clearing BF.
14. Steps 7-14 are the same for each received data
byte.
15. Communication is ended by either the slave
sending an ACK = 1, or the master sending a
Stop condition. If a Stop is sent and Interrupt on
Stop Detect is disabled, the slave will only know
by polling the P bit of the SSTSTAT register.
DS40001722C-page 211
DS40001722C-page 212
SSPOV
BF
SSPIF
S
1
A7
2
A6
3
A5
4
A4
5
A3
6
A2
7
A1
8
9
ACK
1
D7
2
D6
4
D4
5
D3
6
D2
7
D1
SSPxBUF is read
Cleared by software
3
D5
Receiving Data
8
9
2
D6
First byte
of data is
available
in SSPxBUF
1
D0 ACK D7
4
D4
5
D3
6
D2
7
D1
SSPOV set because
SSPxBUF is still full.
ACK is not sent.
Cleared by software
3
D5
Receiving Data
From Slave to Master
8
D0
9
P
SSPIF set on 9th
falling edge of
SCL
ACK = 1
FIGURE 23-14:
SCL
SDA
Receiving Address
Bus Master sends
Stop condition
PIC16(L)F1703/7
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 0, AHEN = 0, DHEN = 0)
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
CKP
SSPOV
BF
SSPIF
1
SCL
S
A7
2
A6
3
A5
4
A4
5
A3
6
A2
7
A1
8
9
R/W=0 ACK
SEN
2
D6
3
D5
4
D4
5
D3
6
D2
7
D1
8
D0
CKP is written to ‘1’ in software,
releasing SCL
SSPxBUF is read
Cleared by software
Clock is held low until CKP is set to ‘1’
1
D7
Receive Data
9
ACK
SEN
3
D5
4
D4
5
D3
First byte
of data is
available
in SSPxBUF
6
D2
7
D1
SSPOV set because
SSPxBUF is still full.
ACK is not sent.
Cleared by software
2
D6
CKP is written to ‘1’ in software,
releasing SCL
1
D7
Receive Data
8
D0
9
ACK
SCL is not held
low because
ACK= 1
SSPIF set on 9th
falling edge of SCL
P
FIGURE 23-15:
SDA
Receive Address
Bus Master sends
Stop condition
PIC16(L)F1703/7
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 1, AHEN = 0, DHEN = 0)
DS40001722C-page 213
DS40001722C-page 214
P
S
ACKTIM
CKP
ACKDT
BF
SSPIF
S
Receiving Address
1
3
5
6
7
8
ACK the received
byte
Slave software
clears ACKDT to
Address is
read from
SSBUF
If AHEN = 1:
SSPIF is set
4
ACKTIM set by hardware
on 8th falling edge of SCL
When AHEN=1:
CKP is cleared by hardware
and SCL is stretched
2
A7 A6 A5 A4 A3 A2 A1
Receiving Data
9
2
3
4
5
6
7
ACKTIM cleared by
hardware in 9th
rising edge of SCL
When DHEN=1:
CKP is cleared by
hardware on 8th falling
edge of SCL
SSPIF is set on
9th falling edge of
SCL, after ACK
1
8
ACK D7 D6 D5 D4 D3 D2 D1 D0
Received Data
1
2
4
5
6
ACKTIM set by hardware
on 8th falling edge of SCL
CKP set by software,
SCL is released
8
Slave software
sets ACKDT to
not ACK
7
Cleared by software
3
D7 D6 D5 D4 D3 D2 D1 D0
Data is read from SSPxBUF
9
ACK
9
P
No interrupt
after not ACK
from Slave
ACK=1
Master sends
Stop condition
FIGURE 23-16:
SCL
SDA
Master Releases SDA
to slave for ACK sequence
PIC16(L)F1703/7
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 0, AHEN = 1, DHEN = 1)
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
P
S
ACKTIM
CKP
ACKDT
BF
SSPIF
S
Receiving Address
4
5
6 7
8
When AHEN = 1;
on the 8th falling edge
of SCL of an address
byte, CKP is cleared
Slave software clears
ACKDT to ACK
the received byte
Received
address is loaded into
SSPxBUF
2 3
ACKTIM is set by hardware
on 8th falling edge of SCL
1
A7 A6 A5 A4 A3 A2 A1
9
ACK
Receive Data
2 3
4
5
6 7
8
ACKTIM is cleared by hardware
on 9th rising edge of SCL
When DHEN = 1;
on the 8th falling edge
of SCL of a received
data byte, CKP is cleared
Received data is
available on SSPxBUF
Cleared by software
1
D7 D6 D5 D4 D3 D2 D1 D0
9
ACK
Receive Data
1
3 4
5
6 7
8
Set by software,
release SCL
Slave sends
not ACK
SSPxBUF can be
read any time before
next byte is loaded
2
D7 D6 D5 D4 D3 D2 D1 D0
9
ACK
CKP is not cleared
if not ACK
No interrupt after
if not ACK
from Slave
P
Master sends
Stop condition
FIGURE 23-17:
SCL
SDA
R/W = 0
Master releases
SDA to slave for ACK sequence
PIC16(L)F1703/7
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 1, AHEN = 1, DHEN = 1)
DS40001722C-page 215
PIC16(L)F1703/7
23.5.3
SLAVE TRANSMISSION
23.5.3.2
7-bit Transmission
When the R/W bit of the incoming address byte is set
and an address match occurs, the R/W bit of the
SSPxSTAT register is set. The received address is
loaded into the SSPxBUF register, and an ACK pulse is
sent by the slave on the ninth bit.
A master device can transmit a read request to a
slave, and then clock data out of the slave. The list
below outlines what software for a slave will need to
do to accomplish a standard transmission.
Figure 23-18 can be used as a reference to this list.
Following the ACK, slave hardware clears the CKP bit
and the SCL pin is held low (see Section 23.5.6
“Clock Stretching” for more detail). By stretching the
clock, the master will be unable to assert another clock
pulse until the slave is done preparing the transmit
data.
1.
The transmit data must be loaded into the SSPxBUF
register which also loads the SSPSR register. Then the
SCL pin should be released by setting the CKP bit of
the SSPxCON1 register. The eight data bits are shifted
out on the falling edge of the SCL input. This ensures
that the SDA signal is valid during the SCL high time.
The ACK pulse from the master-receiver is latched on
the rising edge of the ninth SCL input pulse. This ACK
value is copied to the ACKSTAT bit of the SSPCON2
register. If ACKSTAT is set (not ACK), then the data
transfer is complete. In this case, when the not ACK is
latched by the slave, the slave goes idle and waits for
another occurrence of the Start bit. If the SDA line was
low (ACK), the next transmit data must be loaded into
the SSPxBUF register. Again, the SCL pin must be
released by setting bit CKP.
An MSSP interrupt is generated for each data transfer
byte. The SSPIF bit must be cleared by software and
the SSPxSTAT register is used to determine the status
of the byte. The SSPIF bit is set on the falling edge of
the ninth clock pulse.
23.5.3.1
Slave Mode Bus Collision
A slave receives a Read request and begins shifting
data out on the SDA line. If a bus collision is detected
and the SBCDE bit of the SSPxCON3 register is set,
the BCLIF bit of the PIR register is set. Once a bus collision is detected, the slave goes idle and waits to be
addressed again. User software can use the BCLIF bit
to handle a slave bus collision.
DS40001722C-page 216
Master sends a Start condition on SDA and
SCL.
2. S bit of SSPxSTAT is set; SSPIF is set if interrupt
on Start detect is enabled.
3. Matching address with R/W bit set is received by
the Slave setting SSPIF bit.
4. Slave hardware generates an ACK and sets
SSPIF.
5. SSPIF bit is cleared by user.
6. Software reads the received address from
SSPxBUF, clearing BF.
7. R/W is set so CKP was automatically cleared
after the ACK.
8. The slave software loads the transmit data into
SSPxBUF.
9. CKP bit is set releasing SCL, allowing the
master to clock the data out of the slave.
10. SSPIF is set after the ACK response from the
master is loaded into the ACKSTAT register.
11. SSPIF bit is cleared.
12. The slave software checks the ACKSTAT bit to
see if the master wants to clock out more data.
Note 1: If the master ACKs the clock will be
stretched.
2: ACKSTAT is the only bit updated on the
rising edge of SCL (9th) rather than the
falling.
13. Steps 9-13 are repeated for each transmitted
byte.
14. If the master sends a not ACK; the clock is not
held, but SSPIF is still set.
15. The master sends a Restart condition or a Stop.
16. The slave is no longer addressed.
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
P
S
D/A
R/W
ACKSTAT
CKP
BF
SSPIF
S
Receiving Address
1
2
5
6
7
8
Indicates an address
has been received
R/W is copied from the
matching address byte
9
R/W = 1 Automatic
ACK
Received address
is read from SSPxBUF
4
When R/W is set
SCL is always
held low after 9th SCL
falling edge
3
A7 A6 A5 A4 A3 A2 A1
Transmitting Data
Automatic
2
3
4
5
Set by software
Data to transmit is
loaded into SSPxBUF
Cleared by software
1
6
7
8
9
D7 D6 D5 D4 D3 D2 D1 D0 ACK
Transmitting Data
2
3
4
5
7
8
CKP is not
held for not
ACK
6
Masters not ACK
is copied to
ACKSTAT
BF is automatically
cleared after 8th falling
edge of SCL
1
D7 D6 D5 D4 D3 D2 D1 D0
9
ACK
P
FIGURE 23-18:
SCL
SDA
Master sends
Stop condition
PIC16(L)F1703/7
I2C SLAVE, 7-BIT ADDRESS, TRANSMISSION (AHEN = 0)
DS40001722C-page 217
PIC16(L)F1703/7
23.5.3.3
7-bit Transmission with Address
Hold Enabled
Setting the AHEN bit of the SSPxCON3 register
enables additional clock stretching and interrupt
generation after the eighth falling edge of a received
matching address. Once a matching address has
been clocked in, CKP is cleared and the SSPIF
interrupt is set.
Figure 23-19 displays a standard waveform of a 7-bit
address slave transmission with AHEN enabled.
1.
2.
Bus starts Idle.
Master sends Start condition; the S bit of
SSPxSTAT is set; SSPIF is set if interrupt on
Start detect is enabled.
3. Master sends matching address with R/W bit
set. After the eighth falling edge of the SCL line
the CKP bit is cleared and SSPIF interrupt is
generated.
4. Slave software clears SSPIF.
5. Slave software reads ACKTIM bit of SSPxCON3
register, and R/W and D/A of the SSPxSTAT
register to determine the source of the interrupt.
6. Slave reads the address value from the
SSPxBUF register clearing the BF bit.
7. Slave software decides from this information if it
wishes to ACK or not ACK and sets the ACKDT
bit of the SSPCON2 register accordingly.
8. Slave sets the CKP bit releasing SCL.
9. Master clocks in the ACK value from the slave.
10. Slave hardware automatically clears the CKP bit
and sets SSPIF after the ACK if the R/W bit is
set.
11. Slave software clears SSPIF.
12. Slave loads value to transmit to the master into
SSPxBUF setting the BF bit.
Note: SSPxBUF cannot be loaded until after the
ACK.
13. Slave sets the CKP bit releasing the clock.
14. Master clocks out the data from the slave and
sends an ACK value on the ninth SCL pulse.
15. Slave hardware copies the ACK value into the
ACKSTAT bit of the SSPCON2 register.
16. Steps 10-15 are repeated for each byte transmitted to the master from the slave.
17. If the master sends a not ACK the slave
releases the bus allowing the master to send a
Stop and end the communication.
Note: Master must send a not ACK on the last
byte to ensure that the slave releases the
SCL line to receive a Stop.
DS40001722C-page 218
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
D/A
R/W
ACKTIM
CKP
ACKSTAT
ACKDT
BF
SSPIF
S
Receiving Address
2
4
5
6
7
8
Slave clears
ACKDT to ACK
address
ACKTIM is set on 8th falling
edge of SCL
9
ACK
When R/W = 1;
CKP is always
cleared after ACK
R/W = 1
Received address
is read from SSPxBUF
3
When AHEN = 1;
CKP is cleared by hardware
after receiving matching
address.
1
A7 A6 A5 A4 A3 A2 A1
3
4
5
6
Cleared by software
2
Set by software,
releases SCL
Data to transmit is
loaded into SSPxBUF
1
7
8
9
Transmitting Data
Automatic
D7 D6 D5 D4 D3 D2 D1 D0 ACK
ACKTIM is cleared
on 9th rising edge of SCL
Automatic
Transmitting Data
1
3
4
5
6
7
after not ACK
CKP not cleared
Master’s ACK
response is copied
to SSPxSTAT
BF is automatically
cleared after 8th falling
edge of SCL
2
8
D7 D6 D5 D4 D3 D2 D1 D0
9
ACK
P
Master sends
Stop condition
FIGURE 23-19:
SCL
SDA
Master releases SDA
to slave for ACK sequence
PIC16(L)F1703/7
I2C SLAVE, 7-BIT ADDRESS, TRANSMISSION (AHEN = 1)
DS40001722C-page 219
PIC16(L)F1703/7
23.5.4
SLAVE MODE 10-BIT ADDRESS
RECEPTION
This section describes a standard sequence of events
for the MSSP module configured as an I2C slave in
10-bit Addressing mode.
Figure 23-20 is used as a visual reference for this
description.
This is a step by step process of what must be done by
slave software to accomplish I2C communication.
1.
2.
3.
4.
5.
6.
7.
8.
Bus starts Idle.
Master sends Start condition; S bit of SSPxSTAT
is set; SSPIF is set if interrupt on Start detect is
enabled.
Master sends matching high address with R/W
bit clear; UA bit of the SSPxSTAT register is set.
Slave sends ACK and SSPIF is set.
Software clears the SSPIF bit.
Software reads received address from
SSPxBUF clearing the BF flag.
Slave loads low address into SSPxADD,
releasing SCL.
Master sends matching low address byte to the
slave; UA bit is set.
23.5.5
10-BIT ADDRESSING WITH ADDRESS OR
DATA HOLD
Reception using 10-bit addressing with AHEN or
DHEN set is the same as with 7-bit modes. The only
difference is the need to update the SSPxADD register
using the UA bit. All functionality, specifically when the
CKP bit is cleared and SCL line is held low are the
same. Figure 23-21 can be used as a reference of a
slave in 10-bit addressing with AHEN set.
Figure 23-22 shows a standard waveform for a slave
transmitter in 10-bit Addressing mode.
Note: Updates to the SSPxADD register are not
allowed until after the ACK sequence.
9.
Slave sends ACK and SSPIF is set.
Note: If the low address does not match, SSPIF
and UA are still set so that the slave software can set SSPxADD back to the high
address. BF is not set because there is no
match. CKP is unaffected.
10. Slave clears SSPIF.
11. Slave reads the received matching address
from SSPxBUF clearing BF.
12. Slave loads high address into SSPxADD.
13. Master clocks a data byte to the slave and
clocks out the slaves ACK on the ninth SCL
pulse; SSPIF is set.
14. If SEN bit of SSPCON2 is set, CKP is cleared by
hardware and the clock is stretched.
15. Slave clears SSPIF.
16. Slave reads the received byte from SSPxBUF
clearing BF.
17. If SEN is set the slave sets CKP to release the
SCL.
18. Steps 13-17 repeat for each received byte.
19. Master sends Stop to end the transmission.
DS40001722C-page 220
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
CKP
UA
BF
SSPIF
S
1
1
2
1
5
6
7
0 A9 A8
8
Set by hardware
on 9th falling edge
4
1
When UA = 1;
SCL is held low
9
ACK
If address matches
SSPxADD it is loaded into
SSPxBUF
3
1
Receive First Address Byte
1
3
4
5
6
7
8
Software updates SSPxADD
and releases SCL
2
9
A7 A6 A5 A4 A3 A2 A1 A0 ACK
Receive Second Address Byte
1
3
4
5
6
7
8
9
1
3
4
5
6
7
Data is read
from SSPxBUF
SCL is held low
while CKP = 0
2
8
9
D7 D6 D5 D4 D3 D2 D1 D0 ACK
Receive Data
Set by software,
When SEN = 1;
releasing SCL
CKP is cleared after
9th falling edge of received byte
Receive address is
read from SSPxBUF
Cleared by software
2
D7 D6 D5 D4 D3 D2 D1 D0 ACK
Receive Data
P
FIGURE 23-20:
SCL
SDA
Master sends
Stop condition
PIC16(L)F1703/7
I2C SLAVE, 10-BIT ADDRESS, RECEPTION (SEN = 1, AHEN = 0, DHEN = 0)
DS40001722C-page 221
DS40001722C-page 222
ACKTIM
CKP
UA
ACKDT
BF
2
1
5
0
6
A9
7
A8
Set by hardware
on 9th falling edge
4
1
ACKTIM is set by hardware
on 8th falling edge of SCL
If when AHEN = 1;
on the 8th falling edge
of SCL of an address
byte, CKP is cleared
Slave software clears
ACKDT to ACK
the received byte
3
1
8
R/W = 0
9
ACK
UA
2
A6
3
A5
4
A4
5
A3
6
A2
7
A1
Update to SSPxADD is
not allowed until 9th
falling edge of SCL
SSPxBUF can be
read anytime before
the next received byte
Cleared by software
1
A7
Receive Second Address Byte
8
A0
9
ACK
UA
2
D6
3
D5
4
D4
6
D2
Set CKP with software
releases SCL
7
D1
Update of SSPxADD,
clears UA and releases
SCL
5
D3
Receive Data
Cleared by software
1
D7
8
9
2
Received data
is read from
SSPxBUF
1
D6 D5
Receive Data
D0 ACK D7
FIGURE 23-21:
SSPIF
1
SCL
S
1
SDA
Receive First Address Byte
PIC16(L)F1703/7
I2C SLAVE, 10-BIT ADDRESS, RECEPTION (SEN = 0, AHEN = 1, DHEN = 0)
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
D/A
R/W
ACKSTAT
CKP
UA
BF
SSPIF
4
5
6
7
Set by hardware
3
Indicates an address
has been received
UA indicates SSPxADD
must be updated
SSPxBUF loaded
with received address
2
8
9
1
SCL
S
Receiving Address R/W = 0
1 1 1 1 0 A9 A8
ACK
1
3
4
5
6
7 8
After SSPxADD is
updated, UA is cleared
and SCL is released
Cleared by software
2
9
A7 A6 A5 A4 A3 A2 A1 A0 ACK
Receiving Second Address Byte
1
4
5
6
7 8
Set by hardware
2 3
R/W is copied from the
matching address byte
When R/W = 1;
CKP is cleared on
9th falling edge of SCL
High address is loaded
back into SSPxADD
Received address is
read from SSPxBUF
Sr
1 1 1 1 0 A9 A8
Receive First Address Byte
9
ACK
2
3
4
5
6
7
8
Masters not ACK
is copied
Set by software
releases SCL
Data to transmit is
loaded into SSPxBUF
1
D7 D6 D5 D4 D3 D2 D1 D0
Transmitting Data Byte
9
P
Master sends
Stop condition
ACK = 1
Master sends
not ACK
FIGURE 23-22:
SDA
Master sends
Restart event
PIC16(L)F1703/7
I2C SLAVE, 10-BIT ADDRESS, TRANSMISSION (SEN = 0, AHEN = 0, DHEN = 0)
DS40001722C-page 223
PIC16(L)F1703/7
23.5.6
CLOCK STRETCHING
23.5.6.2
Clock stretching occurs when a device on the bus
holds the SCL line low, effectively pausing communication. The slave may stretch the clock to allow more
time to handle data or prepare a response for the
master device. A master device is not concerned with
stretching as anytime it is active on the bus and not
transferring data it is stretching. Any stretching done
by a slave is invisible to the master software and
handled by the hardware that generates SCL.
The CKP bit of the SSPxCON1 register is used to
control stretching in software. Any time the CKP bit is
cleared, the module will wait for the SCL line to go low
and then hold it. Setting CKP will release SCL and
allow more communication.
23.5.6.1
Normal Clock Stretching
Following an ACK if the R/W bit of SSPxSTAT is set, a
read request, the slave hardware will clear CKP. This
allows the slave time to update SSPxBUF with data to
transfer to the master. If the SEN bit of SSPCON2 is
set, the slave hardware will always stretch the clock
after the ACK sequence. Once the slave is ready; CKP
is set by software and communication resumes.
Note 1: The BF bit has no effect on if the clock will
be stretched or not. This is different than
previous versions of the module that
would not stretch the clock, clear CKP, if
SSPxBUF was read before the ninth
falling edge of SCL.
2: Previous versions of the module did not
stretch the clock for a transmission if
SSPxBUF was loaded before the ninth
falling edge of SCL. It is now always
cleared for read requests.
FIGURE 23-23:
10-bit Addressing Mode
In 10-bit Addressing mode, when the UA bit is set the
clock is always stretched. This is the only time the SCL
is stretched without CKP being cleared. SCL is
released immediately after a write to SSPxADD.
Note: Previous versions of the module did not
stretch the clock if the second address byte
did not match.
23.5.6.3
Byte NACKing
When AHEN bit of SSPxCON3 is set; CKP is cleared
by hardware after the eighth falling edge of SCL for a
received matching address byte. When DHEN bit of
SSPxCON3 is set; CKP is cleared after the eighth falling edge of SCL for received data.
Stretching after the eighth falling edge of SCL allows
the slave to look at the received address or data and
decide if it wants to ACK the received data.
23.5.7
CLOCK SYNCHRONIZATION AND
THE CKP BIT
Any time the CKP bit is cleared, the module will wait
for the SCL line to go low and then hold it. However,
clearing the CKP bit will not assert the SCL output low
until the SCL output is already sampled low. Therefore, the CKP bit will not assert the SCL line until an
external I2C master device has already asserted the
SCL line. The SCL output will remain low until the CKP
bit is set and all other devices on the I2C bus have
released SCL. This ensures that a write to the CKP bit
will not violate the minimum high time requirement for
SCL (see Figure 23-23).
CLOCK SYNCHRONIZATION TIMING
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
SDA
DX ‚ – 1
DX
SCL
CKP
Master device
asserts clock
Master device
releases clock
WR
SSPxCON1
DS40001722C-page 224
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.5.8
GENERAL CALL ADDRESS SUPPORT
In 10-bit Address mode, the UA bit will not be set on
the reception of the general call address. The slave
will prepare to receive the second byte as data, just as
it would in 7-bit mode.
The addressing procedure for the I2C bus is such that
the first byte after the Start condition usually determines which device will be the slave addressed by the
master device. The exception is the general call
address which can address all devices. When this
address is used, all devices should, in theory, respond
with an acknowledge.
If the AHEN bit of the SSPxCON3 register is set, just
as with any other address reception, the slave hardware will stretch the clock after the eighth falling edge
of SCL. The slave must then set its ACKDT value and
release the clock with communication progressing as it
would normally.
The general call address is a reserved address in the
I2C protocol, defined as address 0x00. When the
GCEN bit of the SSPCON2 register is set, the slave
module will automatically ACK the reception of this
address regardless of the value stored in SSPxADD.
After the slave clocks in an address of all zeros with
the R/W bit clear, an interrupt is generated and slave
software can read SSPxBUF and respond.
Figure 23-24 shows a general call reception
sequence.
FIGURE 23-24:
SLAVE MODE GENERAL CALL ADDRESS SEQUENCE
Address is compared to General Call Address
after ACK, set interrupt
R/W = 0
ACK D7
General Call Address
SDA
SCL
S
1
2
3
4
5
6
7
8
9
1
Receiving Data
ACK
D6
D5
D4
D3
D2
D1
D0
2
3
4
5
6
7
8
9
SSPIF
BF (SSPxSTAT<0>)
Cleared by software
GCEN (SSPCON2<7>)
SSPxBUF is read
’1’
23.5.9
SSP MASK REGISTER
An SSP Mask (SSPMSK) register (Register 23-5) is
available in I2C Slave mode as a mask for the value
held in the SSPSR register during an address
comparison operation. A zero (‘0’) bit in the SSPMSK
register has the effect of making the corresponding bit
of the received address a “don’t care”.
This register is reset to all ‘1’s upon any Reset
condition and, therefore, has no effect on standard
SSP operation until written with a mask value.
The SSP Mask register is active during:
• 7-bit Address mode: address compare of A<7:1>.
• 10-bit Address mode: address compare of A<7:0>
only. The SSP mask has no effect during the
reception of the first (high) byte of the address.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 225
PIC16(L)F1703/7
23.6
I2C Master Mode
23.6.1
I2C MASTER MODE OPERATION
Master mode is enabled by setting and clearing the
appropriate SSPM bits in the SSPxCON1 register and
by setting the SSPEN bit. In Master mode, the SDA and
SCK pins must be configured as inputs. The MSSP
peripheral hardware will override the output driver TRIS
controls when necessary to drive the pins low.
The master device generates all of the serial clock
pulses and the Start and Stop conditions. A transfer is
ended with a Stop condition or with a Repeated Start
condition. Since the Repeated Start condition is also
the beginning of the next serial transfer, the I2C bus will
not be released.
Master mode of operation is supported by interrupt
generation on the detection of the Start and Stop
conditions. The Stop (P) and Start (S) bits are cleared
from a Reset or when the MSSP module is disabled.
Control of the I 2C bus may be taken when the P bit is
set, or the bus is Idle.
In Master Transmitter mode, serial data is output
through SDA, while SCL outputs the serial clock. The
first byte transmitted contains the slave address of the
receiving device (7 bits) and the Read/Write (R/W) bit.
In this case, the R/W bit will be logic ‘0’. Serial data is
transmitted eight bits at a time. After each byte is
transmitted, an Acknowledge bit is received. Start and
Stop conditions are output to indicate the beginning
and the end of a serial transfer.
In Firmware Controlled Master mode, user code
conducts all I 2C bus operations based on Start and
Stop bit condition detection. Start and Stop condition
detection is the only active circuitry in this mode. All
other communication is done by the user software
directly manipulating the SDA and SCL lines.
The following events will cause the SSP Interrupt Flag
bit, SSPIF, to be set (SSP interrupt, if enabled):
•
•
•
•
•
Start condition detected
Stop condition detected
Data transfer byte transmitted/received
Acknowledge transmitted/received
Repeated Start generated
Note 1: The MSSP module, when configured in
I2C Master mode, does not allow queuing
of events. For instance, the user is not
allowed to initiate a Start condition and
immediately write the SSPxBUF register
to initiate transmission before the Start
condition is complete. In this case, the
SSPxBUF will not be written to and the
WCOL bit will be set, indicating that a
write to the SSPxBUF did not occur
In Master Receive mode, the first byte transmitted
contains the slave address of the transmitting device
(7 bits) and the R/W bit. In this case, the R/W bit will be
logic ‘1’. Thus, the first byte transmitted is a 7-bit slave
address followed by a ‘1’ to indicate the receive bit.
Serial data is received via SDA, while SCL outputs the
serial clock. Serial data is received eight bits at a time.
After each byte is received, an Acknowledge bit is
transmitted. Start and Stop conditions indicate the
beginning and end of transmission.
A Baud Rate Generator is used to set the clock
frequency output on SCL. See Section 23.7 “Baud
Rate Generator” for more detail.
2: When in Master mode, Start/Stop
detection is masked and an interrupt is
generated when the SEN/PEN bit is
cleared and the generation is complete.
DS40001722C-page 226
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PIC16(L)F1703/7
23.6.2
CLOCK ARBITRATION
Clock arbitration occurs when the master, during any
receive, transmit or Repeated Start/Stop condition,
releases the SCL pin (SCL allowed to float high). When
the SCL pin is allowed to float high, the Baud Rate
Generator (BRG) is suspended from counting until the
SCL pin is actually sampled high. When the SCL pin is
sampled high, the Baud Rate Generator is reloaded
with the contents of SSPxADD<7:0> and begins counting. This ensures that the SCL high time will always be
at least one BRG rollover count in the event that the
clock is held low by an external device (Figure 23-25).
FIGURE 23-25:
BAUD RATE GENERATOR TIMING WITH CLOCK ARBITRATION
SDA
DX ‚ – 1
DX
SCL deasserted but slave holds
SCL low (clock arbitration)
SCL allowed to transition high
SCL
BRG decrements on
Q2 and Q4 cycles
BRG
Value
03h
02h
01h
00h (hold off)
03h
02h
SCL is sampled high, reload takes
place and BRG starts its count
BRG
Reload
23.6.3
WCOL STATUS FLAG
If the user writes the SSPxBUF when a Start, Restart,
Stop, Receive or Transmit sequence is in progress, the
WCOL is set and the contents of the buffer are
unchanged (the write does not occur). Any time the
WCOL bit is set it indicates that an action on SSPxBUF
was attempted while the module was not idle.
Note:
Because queuing of events is not allowed,
writing to the lower five bits of SSPCON2
is disabled until the Start condition is
complete.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 227
PIC16(L)F1703/7
23.6.4
I2C MASTER MODE START
hardware; the Baud Rate Generator is suspended,
leaving the SDA line held low and the Start condition is
complete.
CONDITION TIMING
To initiate a Start condition (Figure 23-26), the user
sets the Start Enable bit, SEN bit of the SSPCON2
register. If the SDA and SCL pins are sampled high,
the Baud Rate Generator is reloaded with the contents
of SSPxADD<7:0> and starts its count. If SCL and
SDA are both sampled high when the Baud Rate Generator times out (TBRG), the SDA pin is driven low. The
action of the SDA being driven low while SCL is high is
the Start condition and causes the S bit of the
SSPxSTAT1 register to be set. Following this, the
Baud Rate Generator is reloaded with the contents of
SSPxADD<7:0> and resumes its count. When the
Baud Rate Generator times out (TBRG), the SEN bit of
the SSPCON2 register will be automatically cleared by
FIGURE 23-26:
Note 1: If at the beginning of the Start condition,
the SDA and SCL pins are already
sampled low, or if during the Start condition, the SCL line is sampled low before
the SDA line is driven low, a bus collision
occurs, the Bus Collision Interrupt Flag,
BCLIF, is set, the Start condition is
aborted and the I2C module is reset into
its Idle state.
2: The Philips I2C specification states that a
bus collision cannot occur on a Start.
FIRST START BIT TIMING
Write to SEN bit occurs here
Set S bit (SSPxSTAT<3>)
At completion of Start bit,
hardware clears SEN bit
and sets SSPIF bit
SDA = 1,
SCL = 1
TBRG
TBRG
Write to SSPxBUF occurs here
SDA
2nd bit
1st bit
TBRG
SCL
S
DS40001722C-page 228
TBRG
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.6.5
I2C MASTER MODE REPEATED
SSPCON2 register will be automatically cleared and
the Baud Rate Generator will not be reloaded, leaving
the SDA pin held low. As soon as a Start condition is
detected on the SDA and SCL pins, the S bit of the
SSPxSTAT register will be set. The SSPIF bit will not be
set until the Baud Rate Generator has timed out.
START CONDITION TIMING
A Repeated Start condition (Figure 23-27) occurs when
the RSEN bit of the SSPCON2 register is programmed
high and the master state machine is no longer active.
When the RSEN bit is set, the SCL pin is asserted low.
When the SCL pin is sampled low, the Baud Rate
Generator is loaded and begins counting. The SDA pin
is released (brought high) for one Baud Rate Generator
count (TBRG). When the Baud Rate Generator times
out, if SDA is sampled high, the SCL pin will be
deasserted (brought high). When SCL is sampled high,
the Baud Rate Generator is reloaded and begins counting. SDA and SCL must be sampled high for one TBRG.
This action is then followed by assertion of the SDA pin
(SDA = 0) for one TBRG while SCL is high. SCL is
asserted low. Following this, the RSEN bit of the
FIGURE 23-27:
Note 1: If RSEN is programmed while any other
event is in progress, it will not take effect.
2: A bus collision during the Repeated Start
condition occurs if:
• SDA is sampled low when SCL
goes from low-to-high.
• SCL goes low before SDA is
asserted low. This may indicate
that another master is attempting
to transmit a data ‘1’.
REPEATED START CONDITION WAVEFORM
S bit set by hardware
Write to SSPCON2
occurs here
SDA = 1,
SCL (no change)
At completion of Start bit,
hardware clears RSEN bit
and sets SSPIF
SDA = 1,
SCL = 1
TBRG
TBRG
TBRG
1st bit
SDA
Write to SSPxBUF occurs here
TBRG
SCL
Sr
TBRG
Repeated Start
 2013-2015 Microchip Technology Inc.
DS40001722C-page 229
PIC16(L)F1703/7
23.6.6
I2C MASTER MODE TRANSMISSION
Transmission of a data byte, a 7-bit address or the
other half of a 10-bit address is accomplished by simply
writing a value to the SSPxBUF register. This action will
set the Buffer Full flag bit, BF, and allow the Baud Rate
Generator to begin counting and start the next transmission. Each bit of address/data will be shifted out
onto the SDA pin after the falling edge of SCL is
asserted. SCL is held low for one Baud Rate Generator
rollover count (TBRG). Data should be valid before SCL
is released high. When the SCL pin is released high, it
is held that way for TBRG. The data on the SDA pin
must remain stable for that duration and some hold
time after the next falling edge of SCL. After the eighth
bit is shifted out (the falling edge of the eighth clock),
the BF flag is cleared and the master releases SDA.
This allows the slave device being addressed to
respond with an ACK bit during the ninth bit time if an
address match occurred, or if data was received properly. The status of ACK is written into the ACKSTAT bit
on the rising edge of the ninth clock. If the master
receives an Acknowledge, the Acknowledge Status bit,
ACKSTAT, is cleared. If not, the bit is set. After the ninth
clock, the SSPIF bit is set and the master clock (Baud
Rate Generator) is suspended until the next data byte
is loaded into the SSPxBUF, leaving SCL low and SDA
unchanged (Figure 23-28).
After the write to the SSPxBUF, each bit of the address
will be shifted out on the falling edge of SCL until all
seven address bits and the R/W bit are completed. On
the falling edge of the eighth clock, the master will
release the SDA pin, allowing the slave to respond with
an Acknowledge. On the falling edge of the ninth clock,
the master will sample the SDA pin to see if the address
was recognized by a slave. The status of the ACK bit is
loaded into the ACKSTAT Status bit of the SSPCON2
register. Following the falling edge of the ninth clock
transmission of the address, the SSPIF is set, the BF
flag is cleared and the Baud Rate Generator is turned
off until another write to the SSPxBUF takes place,
holding SCL low and allowing SDA to float.
23.6.6.1
BF Status Flag
23.6.6.3
ACKSTAT Status Flag
In Transmit mode, the ACKSTAT bit of the SSPCON2
register is cleared when the slave has sent an Acknowledge (ACK = 0) and is set when the slave does not
Acknowledge (ACK = 1). A slave sends an Acknowledge when it has recognized its address (including a
general call), or when the slave has properly received
its data.
23.6.6.4
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Typical transmit sequence:
The user generates a Start condition by setting
the SEN bit of the SSPCON2 register.
SSPIF is set by hardware on completion of the
Start.
SSPIF is cleared by software.
The MSSP module will wait the required start
time before any other operation takes place.
The user loads the SSPxBUF with the slave
address to transmit.
Address is shifted out the SDA pin until all eight
bits are transmitted. Transmission begins as
soon as SSPxBUF is written to.
The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
ACKSTAT bit of the SSPCON2 register.
The MSSP module generates an interrupt at the
end of the ninth clock cycle by setting the SSPIF
bit.
The user loads the SSPxBUF with eight bits of
data.
Data is shifted out the SDA pin until all eight bits
are transmitted.
The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
ACKSTAT bit of the SSPCON2 register.
Steps 8-11 are repeated for all transmitted data
bytes.
The user generates a Stop or Restart condition
by setting the PEN or RSEN bits of the
SSPCON2 register. Interrupt is generated once
the Stop/Restart condition is complete.
In Transmit mode, the BF bit of the SSPxSTAT register
is set when the CPU writes to SSPxBUF and is cleared
when all eight bits are shifted out.
23.6.6.2
WCOL Status Flag
If the user writes the SSPxBUF when a transmit is
already in progress (i.e., SSPSR is still shifting out a
data byte), the WCOL bit is set and the contents of the
buffer are unchanged (the write does not occur).
WCOL must be cleared by software before the next
transmission.
DS40001722C-page 230
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
S
R/W
PEN
SEN
BF (SSPxSTAT<0>)
SSPIF
SCL
SDA
A6
A5
A4
A3
A2
A1
3
4
5
Cleared by software
2
6
7
8
9
After Start condition, SEN cleared by hardware
SSPxBUF written
1
D7
1
SCL held low
while CPU
responds to SSPIF
ACK = 0
R/W = 0
SSPxBUF written with 7-bit address and R/W
start transmit
A7
Transmit Address to Slave
3
D5
4
D4
5
D3
6
D2
7
D1
8
D0
SSPxBUF is written by software
Cleared by software service routine
from SSP interrupt
2
D6
Transmitting Data or Second Half
of 10-bit Address
From slave, clear ACKSTAT bit SSPCON2<6>
P
Cleared by software
9
ACK
ACKSTAT in
SSPCON2 = 1
FIGURE 23-28:
SEN = 0
Write SSPCON2<0> SEN = 1
Start condition begins
PIC16(L)F1703/7
I2C MASTER MODE WAVEFORM (TRANSMISSION, 7 OR 10-BIT ADDRESS)
DS40001722C-page 231
PIC16(L)F1703/7
23.6.7
I2C MASTER MODE RECEPTION
Master mode reception (Figure 23-29) is enabled by
programming the Receive Enable bit, RCEN bit of the
SSP1CON2 register.
Note:
The MSSP module must be in an Idle
state before the RCEN bit is set or the
RCEN bit will be disregarded.
The Baud Rate Generator begins counting and on each
rollover, the state of the SCL pin changes
(high-to-low/low-to-high) and data is shifted into the
SSPSR. After the falling edge of the eighth clock, the
receive enable flag is automatically cleared, the
contents of the SSPSR are loaded into the SSPxBUF,
the BF flag bit is set, the SSPIF flag bit is set and the
Baud Rate Generator is suspended from counting,
holding SCL low. The MSSP is now in Idle state
awaiting the next command. When the buffer is read by
the CPU, the BF flag bit is automatically cleared. The
user can then send an Acknowledge bit at the end of
reception by setting the Acknowledge Sequence
Enable, ACKEN bit of the SSPCON2 register.
23.6.7.1
BF Status Flag
23.6.7.4
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
In receive operation, the BF bit is set when an address
or data byte is loaded into SSPxBUF from SSPSR. It is
cleared when the SSPxBUF register is read.
11.
23.6.7.2
12.
SSPOV Status Flag
In receive operation, the SSPOV bit is set when eight
bits are received into the SSPSR and the BF flag bit is
already set from a previous reception.
13.
14.
23.6.7.3
15.
WCOL Status Flag
If the user writes the SSPxBUF when a receive is
already in progress (i.e., SSPSR is still shifting in a data
byte), the WCOL bit is set and the contents of the buffer
are unchanged (the write does not occur).
DS40001722C-page 232
Typical Receive Sequence:
The user generates a Start condition by setting
the SEN bit of the SSPCON2 register.
SSPIF is set by hardware on completion of the
Start.
SSPIF is cleared by software.
User writes SSPxBUF with the slave address to
transmit and the R/W bit set.
Address is shifted out the SDA pin until all eight
bits are transmitted. Transmission begins as
soon as SSPxBUF is written to.
The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
ACKSTAT bit of the SSPCON2 register.
The MSSP module generates an interrupt at the
end of the ninth clock cycle by setting the SSPIF
bit.
User sets the RCEN bit of the SSPCON2 register
and the master clocks in a byte from the slave.
After the eighth falling edge of SCL, SSPIF and
BF are set.
Master clears SSPIF and reads the received
byte from SSPUF, clears BF.
Master sets ACK value sent to slave in ACKDT
bit of the SSPCON2 register and initiates the
ACK by setting the ACKEN bit.
Master’s ACK is clocked out to the slave and
SSPIF is set.
User clears SSPIF.
Steps 8-13 are repeated for each received byte
from the slave.
Master sends a not ACK or Stop to end
communication.
 2013-2015 Microchip Technology Inc.
 2013-2015 Microchip Technology Inc.
S
RCEN
ACKEN
SSPOV
BF
(SSPxSTAT<0>)
SDA = 0, SCL = 1
while CPU
responds to SSPIF
SSPIF
SCL
SDA
1
A7
2
4
5
6
Cleared by software
3
A6 A5 A4 A3 A2
Transmit Address to Slave
7
8
9
ACK
Receiving Data from Slave
2
3
5
6
7
8
D0
9
ACK
Receiving Data from Slave
2
3
4
RCEN cleared
automatically
5
6
7
Cleared by software
Set SSPIF interrupt
at end of Acknowledge
sequence
Data shifted in on falling edge of CLK
1
ACK from Master
SDA = ACKDT = 0
Cleared in
software
Set SSPIF at end
of receive
9
ACK is not sent
ACK
RCEN cleared
automatically
P
Set SSPIF interrupt
at end of Acknowledge sequence
Bus master
terminates
transfer
Set P bit
(SSPxSTAT<4>)
and SSPIF
PEN bit = 1
written here
SSPOV is set because
SSPxBUF is still full
8
D0
RCEN cleared
automatically
Set ACKEN, start Acknowledge sequence
SDA = ACKDT = 1
D7 D6 D5 D4 D3 D2 D1
Last bit is shifted into SSPSR and
contents are unloaded into SSPxBUF
Cleared by software
Set SSPIF interrupt
at end of receive
4
Cleared by software
1
D7 D6 D5 D4 D3 D2 D1
Master configured as a receiver
by programming SSPCON2<3> (RCEN = 1)
A1 R/W
RCEN = 1, start
next receive
ACK from Master
SDA = ACKDT = 0
FIGURE 23-29:
RCEN cleared
automatically
Master configured as a receiver
by programming SSPCON2<3> (RCEN = 1)
SEN = 0
Write to SSPxBUF occurs here,
ACK from Slave
start XMIT
Write to SSPCON2<0> (SEN = 1),
begin Start condition
Write to SSPCON2<4>
to start Acknowledge sequence
SDA = ACKDT (SSPCON2<5>) = 0
PIC16(L)F1703/7
I2C MASTER MODE WAVEFORM (RECEPTION, 7-BIT ADDRESS)
DS40001722C-page 233
PIC16(L)F1703/7
23.6.8
ACKNOWLEDGE SEQUENCE
TIMING
23.6.9
A Stop bit is asserted on the SDA pin at the end of a
receive/transmit by setting the Stop Sequence Enable
bit, PEN bit of the SSPCON2 register. At the end of a
receive/transmit, the SCL line is held low after the
falling edge of the ninth clock. When the PEN bit is set,
the master will assert the SDA line low. When the SDA
line is sampled low, the Baud Rate Generator is
reloaded and counts down to ‘0’. When the Baud Rate
Generator times out, the SCL pin will be brought high
and one TBRG (Baud Rate Generator rollover count)
later, the SDA pin will be deasserted. When the SDA
pin is sampled high while SCL is high, the P bit of the
SSPxSTAT register is set. A TBRG later, the PEN bit is
cleared and the SSPIF bit is set (Figure 23-31).
An Acknowledge sequence is enabled by setting the
Acknowledge Sequence Enable bit, ACKEN bit of the
SSPCON2 register. When this bit is set, the SCL pin is
pulled low and the contents of the Acknowledge data bit
are presented on the SDA pin. If the user wishes to
generate an Acknowledge, then the ACKDT bit should
be cleared. If not, the user should set the ACKDT bit
before starting an Acknowledge sequence. The Baud
Rate Generator then counts for one rollover period
(TBRG) and the SCL pin is deasserted (pulled high).
When the SCL pin is sampled high (clock arbitration),
the Baud Rate Generator counts for TBRG. The SCL pin
is then pulled low. Following this, the ACKEN bit is automatically cleared, the Baud Rate Generator is turned off
and the MSSP module then goes into Idle mode
(Figure 23-30).
23.6.8.1
23.6.9.1
WCOL Status Flag
If the user writes the SSPxBUF when a Stop sequence
is in progress, then the WCOL bit is set and the
contents of the buffer are unchanged (the write does
not occur).
WCOL Status Flag
If the user writes the SSPxBUF when an Acknowledge
sequence is in progress, then WCOL bit is set and the
contents of the buffer are unchanged (the write does
not occur).
FIGURE 23-30:
STOP CONDITION TIMING
ACKNOWLEDGE SEQUENCE WAVEFORM
Acknowledge sequence starts here,
write to SSPCON2
ACKEN = 1, ACKDT = 0
ACKEN automatically cleared
TBRG
TBRG
SDA
ACK
D0
SCL
8
9
SSPIF
SSPIF set at
the end of receive
Cleared in
software
Cleared in
software
SSPIF set at the end
of Acknowledge sequence
Note: TBRG = one Baud Rate Generator period.
FIGURE 23-31:
STOP CONDITION RECEIVE OR TRANSMIT MODE
SCL = 1 for TBRG, followed by SDA = 1 for TBRG
after SDA sampled high. P bit (SSPxSTAT<4>) is set.
Write to SSPCON2,
set PEN
PEN bit (SSPCON2<2>) is cleared by
hardware and the SSPIF bit is set
Falling edge of
9th clock
TBRG
SCL
SDA
ACK
P
TBRG
TBRG
TBRG
SCL brought high after TBRG
SDA asserted low before rising edge of clock
to setup Stop condition
Note: TBRG = one Baud Rate Generator period.
DS40001722C-page 234
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.6.10
SLEEP OPERATION
23.6.13
the I2C slave
While in Sleep mode,
module can receive
addresses or data and when an address match or
complete byte transfer occurs, wake the processor
from Sleep (if the MSSP interrupt is enabled).
23.6.11
EFFECTS OF A RESET
A Reset disables the MSSP module and terminates the
current transfer.
23.6.12
MULTI-MASTER MODE
In Multi-Master mode, the interrupt generation on the
detection of the Start and Stop conditions allows the
determination of when the bus is free. The Stop (P) and
Start (S) bits are cleared from a Reset or when the
MSSP module is disabled. Control of the I 2C bus may
be taken when the P bit of the SSPxSTAT register is
set, or the bus is Idle, with both the S and P bits clear.
When the bus is busy, enabling the SSP interrupt will
generate the interrupt when the Stop condition occurs.
In multi-master operation, the SDA line must be
monitored for arbitration to see if the signal level is the
expected output level. This check is performed by
hardware with the result placed in the BCLIF bit.
The states where arbitration can be lost are:
•
•
•
•
•
Address Transfer
Data Transfer
A Start Condition
A Repeated Start Condition
An Acknowledge Condition
MULTI -MASTER COMMUNICATION,
BUS COLLISION AND BUS
ARBITRATION
Multi-Master mode support is achieved by bus arbitration. When the master outputs address/data bits onto
the SDA pin, arbitration takes place when the master
outputs a ‘1’ on SDA, by letting SDA float high and
another master asserts a ‘0’. When the SCL pin floats
high, data should be stable. If the expected data on
SDA is a ‘1’ and the data sampled on the SDA pin is ‘0’,
then a bus collision has taken place. The master will set
the Bus Collision Interrupt Flag, BCLIF and reset the
I2C port to its Idle state (Figure 23-32).
If a transmit was in progress when the bus collision
occurred, the transmission is halted, the BF flag is
cleared, the SDA and SCL lines are deasserted and the
SSPxBUF can be written to. When the user services
the bus collision Interrupt Service Routine and if the I2C
bus is free, the user can resume communication by
asserting a Start condition.
If a Start, Repeated Start, Stop or Acknowledge condition was in progress when the bus collision occurred, the
condition is aborted, the SDA and SCL lines are
deasserted and the respective control bits in the
SSPCON2 register are cleared. When the user services
the bus collision Interrupt Service Routine and if the I2C
bus is free, the user can resume communication by
asserting a Start condition.
The master will continue to monitor the SDA and SCL
pins. If a Stop condition occurs, the SSPIF bit will be set.
A write to the SSPxBUF will start the transmission of
data at the first data bit, regardless of where the
transmitter left off when the bus collision occurred.
In Multi-Master mode, the interrupt generation on the
detection of Start and Stop conditions allows the determination of when the bus is free. Control of the I2C bus
can be taken when the P bit is set in the SSPxSTAT
register, or the bus is Idle and the S and P bits are
cleared.
FIGURE 23-32:
BUS COLLISION TIMING FOR TRANSMIT AND ACKNOWLEDGE
Data changes
while SCL = 0
SDA line pulled low
by another source
SDA released
by master
Sample SDA. While SCL is high,
data does not match what is driven
by the master.
Bus collision has occurred.
SDA
SCL
Set bus collision
interrupt (BCLIF)
BCLIF
 2013-2015 Microchip Technology Inc.
DS40001722C-page 235
PIC16(L)F1703/7
23.6.13.1
Bus Collision During a Start
Condition
During a Start condition, a bus collision occurs if:
a)
b)
SDA or SCL are sampled low at the beginning of
the Start condition (Figure 23-33).
SCL is sampled low before SDA is asserted low
(Figure 23-34).
During a Start condition, both the SDA and the SCL
pins are monitored.
If the SDA pin is sampled low during this count, the
BRG is reset and the SDA line is asserted early
(Figure 23-35). If, however, a ‘1’ is sampled on the SDA
pin, the SDA pin is asserted low at the end of the BRG
count. The Baud Rate Generator is then reloaded and
counts down to zero; if the SCL pin is sampled as ‘0’
during this time, a bus collision does not occur. At the
end of the BRG count, the SCL pin is asserted low.
Note:
If the SDA pin is already low, or the SCL pin is already
low, then all of the following occur:
• the Start condition is aborted,
• the BCLIF flag is set and
• the MSSP module is reset to its Idle state
(Figure 23-33).
The Start condition begins with the SDA and SCL pins
deasserted. When the SDA pin is sampled high, the
Baud Rate Generator is loaded and counts down. If the
SCL pin is sampled low while SDA is high, a bus
collision occurs because it is assumed that another
master is attempting to drive a data ‘1’ during the Start
condition.
FIGURE 23-33:
The reason that bus collision is not a
factor during a Start condition is that no
two bus masters can assert a Start condition at the exact same time. Therefore,
one master will always assert SDA before
the other. This condition does not cause a
bus collision because the two masters
must be allowed to arbitrate the first
address following the Start condition. If the
address is the same, arbitration must be
allowed to continue into the data portion,
Repeated Start or Stop conditions.
BUS COLLISION DURING START CONDITION (SDA ONLY)
SDA goes low before the SEN bit is set.
Set BCLIF,
S bit and SSPIF set because
SDA = 0, SCL = 1.
SDA
SCL
Set SEN, enable Start
condition if SDA = 1, SCL = 1
SEN cleared automatically because of bus collision.
SSP module reset into Idle state.
SEN
BCLIF
SDA sampled low before
Start condition. Set BCLIF.
S bit and SSPIF set because
SDA = 0, SCL = 1.
SSPIF and BCLIF are
cleared by software
S
SSPIF
SSPIF and BCLIF are
cleared by software
DS40001722C-page 236
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 23-34:
BUS COLLISION DURING START CONDITION (SCL = 0)
SDA = 0, SCL = 1
TBRG
TBRG
SDA
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
SCL
SCL = 0 before SDA = 0,
bus collision occurs. Set BCLIF.
SEN
SCL = 0 before BRG time-out,
bus collision occurs. Set BCLIF.
BCLIF
Interrupt cleared
by software
S
’0’
’0’
SSPIF
’0’
’0’
FIGURE 23-35:
BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION
SDA = 0, SCL = 1
Set S
Less than TBRG
SDA
Set SSPIF
TBRG
SDA pulled low by other master.
Reset BRG and assert SDA.
SCL
S
SCL pulled low after BRG
time-out
SEN
BCLIF
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
’0’
S
SSPIF
SDA = 0, SCL = 1,
set SSPIF
 2013-2015 Microchip Technology Inc.
Interrupts cleared
by software
DS40001722C-page 237
PIC16(L)F1703/7
23.6.13.2
Bus Collision During a Repeated
Start Condition
If SDA is low, a bus collision has occurred (i.e., another
master is attempting to transmit a data ‘0’, Figure 23-36).
If SDA is sampled high, the BRG is reloaded and begins
counting. If SDA goes from high-to-low before the BRG
times out, no bus collision occurs because no two
masters can assert SDA at exactly the same time.
During a Repeated Start condition, a bus collision
occurs if:
a)
b)
A low level is sampled on SDA when SCL goes
from low level to high level (Case 1).
SCL goes low before SDA is asserted low,
indicating that another master is attempting to
transmit a data ‘1’ (Case 2).
If SCL goes from high-to-low before the BRG times out
and SDA has not already been asserted, a bus collision
occurs. In this case, another master is attempting to
transmit a data ‘1’ during the Repeated Start condition,
see Figure 23-37.
When the user releases SDA and the pin is allowed to
float high, the BRG is loaded with SSPxADD and
counts down to zero. The SCL pin is then deasserted
and when sampled high, the SDA pin is sampled.
FIGURE 23-36:
If, at the end of the BRG time-out, both SCL and SDA
are still high, the SDA pin is driven low and the BRG is
reloaded and begins counting. At the end of the count,
regardless of the status of the SCL pin, the SCL pin is
driven low and the Repeated Start condition is
complete.
BUS COLLISION DURING A REPEATED START CONDITION (CASE 1)
SDA
SCL
Sample SDA when SCL goes high.
If SDA = 0, set BCLIF and release SDA and SCL.
RSEN
BCLIF
Cleared by software
S
’0’
SSPIF
’0’
FIGURE 23-37:
BUS COLLISION DURING REPEATED START CONDITION (CASE 2)
TBRG
TBRG
SDA
SCL
BCLIF
SCL goes low before SDA,
set BCLIF. Release SDA and SCL.
Interrupt cleared
by software
RSEN
S
’0’
SSPIF
DS40001722C-page 238
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.6.13.3
Bus Collision During a Stop
Condition
The Stop condition begins with SDA asserted low.
When SDA is sampled low, the SCL pin is allowed to
float. When the pin is sampled high (clock arbitration),
the Baud Rate Generator is loaded with SSPxADD and
counts down to zero. After the BRG times out, SDA is
sampled. If SDA is sampled low, a bus collision has
occurred. This is due to another master attempting to
drive a data ‘0’ (Figure 23-38). If the SCL pin is sampled
low before SDA is allowed to float high, a bus collision
occurs. This is another case of another master
attempting to drive a data ‘0’ (Figure 23-39).
Bus collision occurs during a Stop condition if:
a)
b)
After the SDA pin has been deasserted and
allowed to float high, SDA is sampled low after
the BRG has timed out (Case 1).
After the SCL pin is deasserted, SCL is sampled
low before SDA goes high (Case 2).
FIGURE 23-38:
BUS COLLISION DURING A STOP CONDITION (CASE 1)
TBRG
TBRG
TBRG
SDA
SDA sampled
low after TBRG,
set BCLIF
SDA asserted low
SCL
PEN
BCLIF
P
’0’
SSPIF
’0’
FIGURE 23-39:
BUS COLLISION DURING A STOP CONDITION (CASE 2)
TBRG
TBRG
TBRG
SDA
Assert SDA
SCL
SCL goes low before SDA goes high,
set BCLIF
PEN
BCLIF
P
’0’
SSPIF
’0’
 2013-2015 Microchip Technology Inc.
DS40001722C-page 239
PIC16(L)F1703/7
TABLE 23-3:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH I2C OPERATION
Bit 7
Bit 6
ANSELA
—
ANSELB(1)
—
ANSELC
INTCON
Reset
Values on
Page:
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
114
—
ANSB5
ANSB4
—
—
—
—
120
ANSC7(1)
ANSC6(1)
ANSC5(2)
ANSC4(2)
ANSC3
ANSC2
ANSC1
ANSC0
125
GIE
PEIE
TMR0IE
INTE
IOCIE
TMR0IF
INTF
IOCIF
77
PIE1
TMR1GIE
ADIE
—
—
SSP1IE
CCP1IE
TMR2IE
TMR1IE
78
PIE2
—
—
—
—
BCL1IE
—
—
CCP2IE
79
PIR1
TMR1GIF
ADIF
—
—
SSP1IF
CCP1IF
TMR2IF
TMR1IF
81
PIR2
—
—
—
—
BCL1IF
—
—
CCP2IF
RxyPPS
—
—
—
82
RxyPPS<4:0>
132
SSPCLKPPS
—
—
—
SSPCLKPPS<4:0>
130, 131
SSPDATPPS
—
—
—
SSPDATPPS<4:0>
130, 131
SSPSSPPS
—
—
—
SSPSSPPS<4:0>
130, 131
SSP1ADD
ADD<7:0>
SSP1BUF
Synchronous Serial Port Receive Buffer/Transmit Register
SSP1CON1
248
198*
WCOL
SSPOV
SSPEN
CKP
SSP1CON2
GCEN
ACKSTAT
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
245
SSP1CON3
ACKTIM
PCIE
SCIE
BOEN
SDAHT
SBCDE
AHEN
DHEN
246
SMP
CKE
D/A
P
S
R/W
UA
BF
242
—
—
TRISA5
TRISA4
—(3)
TRISA2
TRISA1
TRISA0
113
TRISB
TRISB7
TRISB6
TRISB5
TRISB4
—
—
—
—
119
TRISC
TRISC7(1)
TRISC6(1)
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
124
SSP1MSK
SSP1STAT
TRISA
(1)
Legend:
*
Note 1:
2:
3:
SSPM<3:0>
244
MSK<7:0>
248
2
— = unimplemented location, read as ‘0’. Shaded cells are not used by the MSSP module in I C mode.
Page provides register information.
PIC16(L)F1707 only.
PIC16(L)F1703 only.
Unimplemented, read as ‘1’.
DS40001722C-page 240
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
23.7
BAUD RATE GENERATOR
The MSSP module has a Baud Rate Generator available for clock generation in both I2C and SPI Master
modes. The Baud Rate Generator (BRG) reload value
is placed in the SSPxADD register (Register 23-6).
When a write occurs to SSPxBUF, the Baud Rate
Generator will automatically begin counting down.
Once the given operation is complete, the internal clock
will automatically stop counting and the clock pin will
remain in its last state.
module clock line. The logic dictating when the reload
signal is asserted depends on the mode the MSSP is
being operated in.
Table 23-4 demonstrates clock rates based on
instruction cycles and the BRG value loaded into
SSPxADD.
EQUATION 23-1:
FOSC
FCLOCK = ------------------------------------------------ SSPxADD + 1   4 
An internal signal “Reload” in Figure 23-40 triggers the
value from SSPxADD to be loaded into the BRG
counter. This occurs twice for each oscillation of the
FIGURE 23-40:
BAUD RATE GENERATOR BLOCK DIAGRAM
SSPM<3:0>
SSPM<3:0>
Reload
SSPxADD<7:0>
Reload
Control
SCL
SSPCLK
BRG Down Counter
FOSC/2
Note: Values of 0x00, 0x01 and 0x02 are not valid
for SSPxADD when used as a Baud Rate
Generator for I2C. This is an implementation
limitation.
TABLE 23-4:
Note:
MSSP CLOCK RATE W/BRG
FOSC
FCY
BRG Value
FCLOCK
(2 Rollovers of BRG)
32 MHz
8 MHz
13h
400 kHz
32 MHz
8 MHz
19h
308 kHz
32 MHz
8 MHz
4Fh
100 kHz
16 MHz
4 MHz
09h
400 kHz
16 MHz
4 MHz
0Ch
308 kHz
16 MHz
4 MHz
27h
100 kHz
4 MHz
1 MHz
09h
100 kHz
Refer to the I/O port electrical specifications in Table 26-4 to ensure the system is designed to support IOL
requirements.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 241
PIC16(L)F1703/7
23.8
Register Definitions: MSSP Control
REGISTER 23-1:
SSP1STAT: SSP STATUS REGISTER
R/W-0/0
R/W-0/0
R-0/0
R-0/0
R-0/0
R-0/0
R-0/0
R-0/0
SMP
CKE
D/A
P
S
R/W
UA
BF
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
SMP: SPI Data Input Sample bit
SPI Master mode:
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
SPI Slave mode:
SMP must be cleared when SPI is used in Slave mode
In I2 C Master or Slave mode:
1 = Slew rate control disabled for Standard Speed mode (100 kHz and 1 MHz)
0 = Slew rate control enabled for High-Speed mode (400 kHz)
bit 6
CKE: SPI Clock Edge Select bit (SPI mode only)
In SPI Master or Slave mode:
1 = Transmit occurs on transition from active to Idle clock state
0 = Transmit occurs on transition from Idle to active clock state
In I2 C™ mode only:
1 = Enable input logic so that thresholds are compliant with SMBus specification
0 = Disable SMBus specific inputs
bit 5
D/A: Data/Address bit (I2C mode only)
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
bit 4
P: Stop bit
(I2C mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared.)
1 = Indicates that a Stop bit has been detected last (this bit is ‘0’ on Reset)
0 = Stop bit was not detected last
bit 3
S: Start bit
(I2C mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared.)
1 = Indicates that a Start bit has been detected last (this bit is ‘0’ on Reset)
0 = Start bit was not detected last
bit 2
R/W: Read/Write bit information (I2C mode only)
This bit holds the R/W bit information following the last address match. This bit is only valid from the address match
to the next Start bit, Stop bit, or not ACK bit.
In I2 C Slave mode:
1 = Read
0 = Write
In I2 C Master mode:
1 = Transmit is in progress
0 = Transmit is not in progress
OR-ing this bit with SEN, RSEN, PEN, RCEN or ACKEN will indicate if the MSSP is in Idle mode.
bit 1
UA: Update Address bit (10-bit I2C mode only)
1 = Indicates that the user needs to update the address in the SSPxADD register
0 = Address does not need to be updated
DS40001722C-page 242
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PIC16(L)F1703/7
REGISTER 23-1:
bit 0
SSP1STAT: SSP STATUS REGISTER (CONTINUED)
BF: Buffer Full Status bit
Receive (SPI and I2 C modes):
1 = Receive complete, SSPxBUF is full
0 = Receive not complete, SSPxBUF is empty
Transmit (I2 C mode only):
1 = Data transmit in progress (does not include the ACK and Stop bits), SSPxBUF is full
0 = Data transmit complete (does not include the ACK and Stop bits), SSPxBUF is empty
 2013-2015 Microchip Technology Inc.
DS40001722C-page 243
PIC16(L)F1703/7
REGISTER 23-2:
SSP1CON1: SSP CONTROL REGISTER 1
R/C/HS-0/0
R/C/HS-0/0
R/W-0/0
R/W-0/0
WCOL
SSPOV(1)
SSPEN
CKP
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
SSPM<3:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
HS = Bit is set by hardware
C = User cleared
bit 7
WCOL: Write Collision Detect bit
Master mode:
1 = A write to the SSPxBUF register was attempted while the I2C conditions were not valid for a transmission to be started
0 = No collision
Slave mode:
1 = The SSPxBUF register is written while it is still transmitting the previous word (must be cleared in software)
0 = No collision
bit 6
SSPOV: Receive Overflow Indicator bit(1)
In SPI mode:
1 = A new byte is received while the SSPxBUF register is still holding the previous data. In case of overflow, the data in SSPSR is lost.
Overflow can only occur in Slave mode. In Slave mode, the user must read the SSPxBUF, even if only transmitting data, to avoid
setting overflow. In Master mode, the overflow bit is not set since each new reception (and transmission) is initiated by writing to the
SSPxBUF register (must be cleared in software).
0 = No overflow
2
In I C mode:
1 = A byte is received while the SSPxBUF register is still holding the previous byte. SSPOV is a “don’t care” in Transmit mode
(must be cleared in software).
0 = No overflow
bit 5
SSPEN: Synchronous Serial Port Enable bit
In both modes, when enabled, these pins must be properly configured as input or output
In SPI mode:
1 = Enables serial port and configures SCK, SDO, SDI and SS as the source of the serial port pins(2)
0 = Disables serial port and configures these pins as I/O port pins
In I2C mode:
1 = Enables the serial port and configures the SDA and SCL pins as the source of the serial port pins(3)
0 = Disables serial port and configures these pins as I/O port pins
bit 4
CKP: Clock Polarity Select bit
In SPI mode:
1 = Idle state for clock is a high level
0 = Idle state for clock is a low level
In I2C Slave mode:
SCL release control
1 = Enable clock
0 = Holds clock low (clock stretch). (Used to ensure data setup time.)
In I2C Master mode:
Unused in this mode
bit 3-0
SSPM<3:0>: Synchronous Serial Port Mode Select bits
1111 = I2C Slave mode, 10-bit address with Start and Stop bit interrupts enabled
1110 = I2C Slave mode, 7-bit address with Start and Stop bit interrupts enabled
1101 = Reserved
1100 = Reserved
1011 = I2C firmware controlled Master mode (slave idle)
1010 = SPI Master mode, clock = FOSC/(4 * (SSPxADD+1))(5)
1001 = Reserved
1000 = I2C Master mode, clock = FOSC / (4 * (SSPxADD+1))(4)
0111 = I2C Slave mode, 10-bit address
0110 = I2C Slave mode, 7-bit address
0101 = SPI Slave mode, clock = SCK pin, SS pin control disabled, SS can be used as I/O pin
0100 = SPI Slave mode, clock = SCK pin, SS pin control enabled
0011 = SPI Master mode, clock = T2_match/2
0010 = SPI Master mode, clock = FOSC/64
0001 = SPI Master mode, clock = FOSC/16
0000 = SPI Master mode, clock = FOSC/4
Note
1:
2:
3:
4:
5:
In Master mode, the overflow bit is not set since each new reception (and transmission) is initiated by writing to the SSPxBUF register.
When enabled, these pins must be properly configured as input or output. Use SSPSSPPS, SSPCLKPPS, SSPDATPPS, and RxyPPS
to select the pins.
When enabled, the SDA and SCL pins must be configured as inputs. Use SSPCLKPPS, SSPDATPPS, and RxyPPS to select the pins.
SSPxADD values of 0, 1 or 2 are not supported for I2C mode.
SSPxADD value of ‘0’ is not supported. Use SSPM = 0000 instead.
DS40001722C-page 244
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
SSP1CON2: SSP CONTROL REGISTER 2(1)
REGISTER 23-3:
R/W-0/0
R-0/0
R/W-0/0
R/S/HS-0/0
R/S/HS-0/0
R/S/HS-0/0
R/S/HS-0/0
R/W/HS-0/0
GCEN
ACKSTAT
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
HC = Cleared by hardware
S = User set
bit 7
GCEN: General Call Enable bit (in I2C Slave mode only)
1 = Enable interrupt when a general call address (0x00 or 00h) is received in the SSPSR
0 = General call address disabled
bit 6
ACKSTAT: Acknowledge Status bit (in I2C mode only)
1 = Acknowledge was not received
0 = Acknowledge was received
bit 5
ACKDT: Acknowledge Data bit (in I2C mode only)
In Receive mode:
Value transmitted when the user initiates an Acknowledge sequence at the end of a receive
1 = Not Acknowledge
0 = Acknowledge
bit 4
ACKEN: Acknowledge Sequence Enable bit (in I2C Master mode only)
In Master Receive mode:
1 = Initiate Acknowledge sequence on SDA and SCL pins, and transmit ACKDT data bit.
Automatically cleared by hardware.
0 = Acknowledge sequence idle
bit 3
RCEN: Receive Enable bit (in I2C Master mode only)
1 = Enables Receive mode for I2C
0 = Receive idle
bit 2
PEN: Stop Condition Enable bit (in I2C Master mode only)
SCKMSSP Release Control:
1 = Initiate Stop condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Stop condition Idle
bit 1
RSEN: Repeated Start Condition Enable bit (in I2C Master mode only)
1 = Initiate Repeated Start condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Repeated Start condition Idle
bit 0
SEN: Start Condition Enable/Stretch Enable bit
In Master mode:
1 = Initiate Start condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Start condition Idle
In Slave mode:
1 = Clock stretching is enabled for both slave transmit and slave receive (stretch enabled)
0 = Clock stretching is disabled
Note 1:
For bits ACKEN, RCEN, PEN, RSEN, SEN: If the I2C module is not in the Idle mode, this bit may not be
set (no spooling) and the SSPxBUF may not be written (or writes to the SSPxBUF are disabled).
 2013-2015 Microchip Technology Inc.
DS40001722C-page 245
PIC16(L)F1703/7
REGISTER 23-4:
SSP1CON3: SSP CONTROL REGISTER 3
R-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
ACKTIM(3)
PCIE
SCIE
BOEN
SDAHT
SBCDE
AHEN
DHEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
ACKTIM: Acknowledge Time Status bit (I2C mode only)(3)
1 = Indicates the I2C bus is in an Acknowledge sequence, set on eighth falling edge of SCL clock
0 = Not an Acknowledge sequence, cleared on ninth rising edge of SCL clock
bit 6
PCIE: Stop Condition Interrupt Enable bit (I2C mode only)
1 = Enable interrupt on detection of Stop condition
0 = Stop detection interrupts are disabled(2)
bit 5
SCIE: Start Condition Interrupt Enable bit (I2C mode only)
1 = Enable interrupt on detection of Start or Restart conditions
0 = Start detection interrupts are disabled(2)
bit 4
BOEN: Buffer Overwrite Enable bit
In SPI Slave mode:(1)
1 = SSPxBUF updates every time that a new data byte is shifted in ignoring the BF bit
0 = If new byte is received with BF bit of the SSPxSTAT register already set, SSPOV bit of the
SSPxCON1 register is set, and the buffer is not updated
In I2C Master mode and SPI Master mode:
This bit is ignored.
In I2C Slave mode:
1 = SSPxBUF is updated and ACK is generated for a received address/data byte, ignoring the
state of the SSPOV bit only if the BF bit = 0.
0 = SSPxBUF is only updated when SSPOV is clear
bit 3
SDAHT: SDA Hold Time Selection bit (I2C mode only)
1 = Minimum of 300 ns hold time on SDA after the falling edge of SCL
0 = Minimum of 100 ns hold time on SDA after the falling edge of SCL
bit 2
SBCDE: Slave Mode Bus Collision Detect Enable bit (I2C Slave mode only)
If, on the rising edge of SCL, SDA is sampled low when the module is outputting a high state, the
BCL1IF bit of the PIR2 register is set, and bus goes idle
1 = Enable slave bus collision interrupts
0 = Slave bus collision interrupts are disabled
bit 1
AHEN: Address Hold Enable bit (I2C Slave mode only)
1 = Following the eighth falling edge of SCL for a matching received address byte; CKP bit of the
SSPxCON1 register will be cleared and the SCL will be held low.
0 = Address holding is disabled
bit 0
DHEN: Data Hold Enable bit (I2C Slave mode only)
1 = Following the eighth falling edge of SCL for a received data byte; slave hardware clears the CKP
bit of the SSPxCON1 register and SCL is held low.
0 = Data holding is disabled
DS40001722C-page 246
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
REGISTER 23-4:
Note 1:
2:
3:
SSP1CON3: SSP CONTROL REGISTER 3 (CONTINUED)
For daisy-chained SPI operation; allows the user to ignore all but the last received byte. SSPOV is still set
when a new byte is received and BF = 1, but hardware continues to write the most recent byte to
SSPxBUF.
This bit has no effect in Slave modes that Start and Stop condition detection is explicitly listed as enabled.
The ACKTIM Status bit is only active when the AHEN bit or DHEN bit is set.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 247
PIC16(L)F1703/7
REGISTER 23-5:
R/W-1/1
SSP1MSK: SSP MASK REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
MSK<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-1
MSK<7:1>: Mask bits
1 = The received address bit n is compared to SSPxADD<n> to detect I2C address match
0 = The received address bit n is not used to detect I2C address match
bit 0
MSK<0>: Mask bit for I2C Slave mode, 10-bit Address
I2C Slave mode, 10-bit address (SSPM<3:0> = 0111 or 1111):
1 = The received address bit 0 is compared to SSPxADD<0> to detect I2C address match
0 = The received address bit 0 is not used to detect I2C address match
I2C Slave mode, 7-bit address, the bit is ignored
REGISTER 23-6:
R/W-0/0
SSPxADD: MSSP ADDRESS AND BAUD RATE REGISTER (I2C MODE)
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
ADD<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
Master mode:
bit 7-0
ADD<7:0>: Baud Rate Clock Divider bits
SCL pin clock period = ((ADD<7:0> + 1) *4)/FOSC
10-Bit Slave mode – Most Significant Address Byte:
bit 7-3
Not used: Unused for Most Significant Address Byte. Bit state of this register is a “don’t care”. Bit
pattern sent by master is fixed by I2C specification and must be equal to ‘11110’. However, those bits
are compared by hardware and are not affected by the value in this register.
bit 2-1
ADD<2:1>: Two Most Significant bits of 10-bit address
bit 0
Not used: Unused in this mode. Bit state is a “don’t care”.
10-Bit Slave mode – Least Significant Address Byte:
bit 7-0
ADD<7:0>: Eight Least Significant bits of 10-bit address
7-Bit Slave mode:
bit 7-1
ADD<7:1>: 7-bit address
bit 0
Not used: Unused in this mode. Bit state is a “don’t care”.
DS40001722C-page 248
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
24.0
IN-CIRCUIT SERIAL
PROGRAMMING™ (ICSP™)
ICSP™ programming allows customers to manufacture
circuit boards with unprogrammed devices. Programming
can be done after the assembly process, allowing the
device to be programmed with the most recent firmware
or a custom firmware. Five pins are needed for ICSP™
programming:
• ICSPCLK
• ICSPDAT
• MCLR/VPP
• VDD
• VSS
In Program/Verify mode the program memory, user IDs
and the Configuration Words are programmed through
serial communications. The ICSPDAT pin is a
bidirectional I/O used for transferring the serial data
and the ICSPCLK pin is the clock input. For more
information on ICSP™ refer to the “PIC16(L)F170X
Memory Programming Specification” (DS41683).
24.1
High-Voltage Programming Entry
Mode
The device is placed into High-Voltage Programming
Entry mode by holding the ICSPCLK and ICSPDAT
pins low then raising the voltage on MCLR/VPP to VIHH.
24.2
Low-Voltage Programming Entry
Mode
The Low-Voltage Programming Entry mode allows the
PIC® Flash MCUs to be programmed using VDD only,
without high voltage. When the LVP bit of Configuration
Words is set to ‘1’, the low-voltage ICSP programming
entry is enabled. To disable the Low-Voltage ICSP
mode, the LVP bit must be programmed to ‘0’.
Entry into the Low-Voltage Programming Entry mode
requires the following steps:
1.
2.
MCLR is brought to VIL.
A 32-bit key sequence is presented on
ICSPDAT, while clocking ICSPCLK.
24.3
Common Programming Interfaces
Connection to a target device is typically done through
an ICSP™ header. A commonly found connector on
development tools is the RJ-11 in the 6P6C (6-pin,
6-connector) configuration. See Figure 24-1.
FIGURE 24-1:
VDD
ICD RJ-11 STYLE
CONNECTOR INTERFACE
ICSPDAT
NC
2 4 6
ICSPCLK
1 3 5
Target
VPP/MCLR
VSS
PC Board
Bottom Side
Pin Description*
1 = VPP/MCLR
2 = VDD Target
3 = VSS (ground)
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
Another connector often found in use with the PICkit™
programmers is a standard 6-pin header with 0.1 inch
spacing. Refer to Figure 24-2.
For additional interface recommendations, refer to your
specific device programmer manual prior to PCB
design.
It is recommended that isolation devices be used to
separate the programming pins from other circuitry.
The type of isolation is highly dependent on the specific
application and may include devices such as resistors,
diodes, or even jumpers. See Figure 24-3 for more
information.
Once the key sequence is complete, MCLR must be
held at VIL for as long as Program/Verify mode is to be
maintained.
If low-voltage programming is enabled (LVP = 1), the
MCLR Reset function is automatically enabled and
cannot be disabled. See Section 5.5 “MCLR” for more
information.
The LVP bit can only be reprogrammed to ‘0’ by using
the High-Voltage Programming mode.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 249
PIC16(L)F1703/7
FIGURE 24-2:
PICkit™ PROGRAMMER STYLE CONNECTOR INTERFACE
Pin 1 Indicator
Pin Description*
1 = VPP/MCLR
1
2
3
4
5
6
2 = VDD Target
3 = VSS (ground)
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
*
FIGURE 24-3:
The 6-pin header (0.100" spacing) accepts 0.025" square pins.
TYPICAL CONNECTION FOR ICSP™ PROGRAMMING
External
Programming
Signals
Device to be
Programmed
VDD
VDD
VDD
VPP
MCLR/VPP
VSS
VSS
Data
ICSPDAT
Clock
ICSPCLK
*
*
*
To Normal Connections
* Isolation devices (as required).
DS40001722C-page 250
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
25.0
INSTRUCTION SET SUMMARY
25.1
Read-Modify-Write Operations
• Byte Oriented
• Bit Oriented
• Literal and Control
Any instruction that specifies a file register as part of
the instruction performs a Read-Modify-Write (R-M-W)
operation. The register is read, the data is modified,
and the result is stored according to either the instruction, or the destination designator ‘d’. A read operation
is performed on a register even if the instruction writes
to that register.
The literal and control category contains the most
varied instruction word format.
TABLE 25-1:
Each instruction is a 14-bit word containing the operation code (opcode) and all required operands. The
opcodes are broken into three broad categories.
Table 25-3 lists the instructions recognized by the
MPASMTM assembler.
All instructions are executed within a single instruction
cycle, with the following exceptions, which may take
two or three cycles:
• Subroutine takes two cycles (CALL, CALLW)
• Returns from interrupts or subroutines take two
cycles (RETURN, RETLW, RETFIE)
• Program branching takes two cycles (GOTO, BRA,
BRW, BTFSS, BTFSC, DECFSZ, INCSFZ)
• One additional instruction cycle will be used when
any instruction references an indirect file register
and the file select register is pointing to program
memory.
One instruction cycle consists of 4 oscillator cycles; for
an oscillator frequency of 4 MHz, this gives a nominal
instruction execution rate of 1 MHz.
All instruction examples use the format ‘0xhh’ to
represent a hexadecimal number, where ‘h’ signifies a
hexadecimal digit.
OPCODE FIELD
DESCRIPTIONS
Field
f
Description
Register file address (0x00 to 0x7F)
W
Working register (accumulator)
b
Bit address within an 8-bit file register
k
Literal field, constant data or label
x
Don’t care location (= 0 or 1).
The assembler will generate code with x = 0.
It is the recommended form of use for
compatibility with all Microchip software tools.
d
Destination select; d = 0: store result in W,
d = 1: store result in file register f.
Default is d = 1.
n
FSR or INDF number. (0-1)
mm
Pre-post increment-decrement mode
selection
TABLE 25-2:
ABBREVIATION
DESCRIPTIONS
Field
Program Counter
TO
Time-Out bit
C
DC
Z
PD
 2013-2015 Microchip Technology Inc.
Description
PC
Carry bit
Digit Carry bit
Zero bit
Power-Down bit
DS40001722C-page 251
PIC16(L)F1703/7
FIGURE 25-1:
GENERAL FORMAT FOR
INSTRUCTIONS
Byte-oriented file register operations
13
8 7 6
OPCODE
d
f (FILE #)
0
d = 0 for destination W
d = 1 for destination f
f = 7-bit file register address
Bit-oriented file register operations
13
10 9
7 6
OPCODE
b (BIT #)
f (FILE #)
0
b = 3-bit bit address
f = 7-bit file register address
Literal and control operations
General
13
OPCODE
8
7
0
k (literal)
k = 8-bit immediate value
CALL and GOTO instructions only
13
11 10
OPCODE
0
k (literal)
k = 11-bit immediate value
MOVLP instruction only
13
OPCODE
7
6
0
k (literal)
k = 7-bit immediate value
MOVLB instruction only
13
OPCODE
5 4
0
k (literal)
k = 5-bit immediate value
BRA instruction only
13
OPCODE
9
8
0
k (literal)
k = 9-bit immediate value
FSR Offset instructions
13
OPCODE
7
6
n
5
0
k (literal)
n = appropriate FSR
k = 6-bit immediate value
FSR Increment instructions
13
OPCODE
3
2 1
0
n m (mode)
n = appropriate FSR
m = 2-bit mode value
OPCODE only
13
0
OPCODE
DS40001722C-page 252
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 25-3:
PIC16(L)F1703/7 INSTRUCTION SET
14-Bit Opcode
Mnemonic,
Operands
Description
Cycles
MSb
LSb
Status
Affected
Notes
BYTE-ORIENTED FILE REGISTER OPERATIONS
ADDWF
ADDWFC
ANDWF
ASRF
LSLF
LSRF
CLRF
CLRW
COMF
DECF
INCF
IORWF
MOVF
MOVWF
RLF
RRF
SUBWF
SUBWFB
SWAPF
XORWF
f, d
f, d
f, d
f, d
f, d
f, d
f
–
f, d
f, d
f, d
f, d
f, d
f
f, d
f, d
f, d
f, d
f, d
f, d
Add W and f
Add with Carry W and f
AND W with f
Arithmetic Right Shift
Logical Left Shift
Logical Right Shift
Clear f
Clear W
Complement f
Decrement f
Increment f
Inclusive OR W with f
Move f
Move W to f
Rotate Left f through Carry
Rotate Right f through Carry
Subtract W from f
Subtract with Borrow W from f
Swap nibbles in f
Exclusive OR W with f
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
00
11
00
11
11
11
00
00
00
00
00
00
00
00
00
00
00
11
00
00
0111
1101
0101
0111
0101
0110
0001
0001
1001
0011
1010
0100
1000
0000
1101
1100
0010
1011
1110
0110
dfff
dfff
dfff
dfff
dfff
dfff
lfff
0000
dfff
dfff
dfff
dfff
dfff
1fff
dfff
dfff
dfff
dfff
dfff
dfff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
00xx
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
C, DC, Z
C, DC, Z
Z
C, Z
C, Z
C, Z
Z
Z
Z
Z
Z
Z
Z
C
C
C, DC, Z
C, DC, Z
Z
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
BYTE ORIENTED SKIP OPERATIONS
DECFSZ
INCFSZ
f, d
f, d
Decrement f, Skip if 0
Increment f, Skip if 0
BCF
BSF
f, b
f, b
Bit Clear f
Bit Set f
1(2)
1(2)
00
00
1, 2
1, 2
1011 dfff ffff
1111 dfff ffff
BIT-ORIENTED FILE REGISTER OPERATIONS
1
1
01
01
00bb bfff ffff
01bb bfff ffff
2
2
1, 2
1, 2
BIT-ORIENTED SKIP OPERATIONS
BTFSC
BTFSS
f, b
f, b
Bit Test f, Skip if Clear
Bit Test f, Skip if Set
1 (2)
1 (2)
01
01
10bb bfff ffff
11bb bfff ffff
1
1
1
1
1
1
1
1
11
11
11
00
11
11
11
11
1110
1001
1000
0000
0001
0000
1100
1010
LITERAL OPERATIONS
ADDLW
ANDLW
IORLW
MOVLB
MOVLP
MOVLW
SUBLW
XORLW
k
k
k
k
k
k
k
k
Note 1:
If the Program Counter (PC) is modified, or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
If this instruction addresses an INDF register and the MSb of the corresponding FSR is set, this instruction will require
one additional instruction cycle.
2:
Add literal and W
AND literal with W
Inclusive OR literal with W
Move literal to BSR
Move literal to PCLATH
Move literal to W
Subtract W from literal
Exclusive OR literal with W
 2013-2015 Microchip Technology Inc.
kkkk
kkkk
kkkk
001k
1kkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
C, DC, Z
Z
Z
C, DC, Z
Z
DS40001722C-page 253
PIC16(L)F1703/7
TABLE 25-3:
PIC16(L)F1703/7 INSTRUCTION SET (CONTINUED)
14-Bit Opcode
Mnemonic,
Operands
Description
Cycles
MSb
LSb
Status
Affected
Notes
CONTROL OPERATIONS
BRA
BRW
CALL
CALLW
GOTO
RETFIE
RETLW
RETURN
k
–
k
–
k
k
k
–
Relative Branch
Relative Branch with W
Call Subroutine
Call Subroutine with W
Go to address
Return from interrupt
Return with literal in W
Return from Subroutine
2
2
2
2
2
2
2
2
CLRWDT
NOP
OPTION
RESET
SLEEP
TRIS
–
–
–
–
–
f
Clear Watchdog Timer
No Operation
Load OPTION_REG register with W
Software device Reset
Go into Standby mode
Load TRIS register with W
ADDFSR
MOVIW
n, k
n mm
MOVWI
k[n]
n mm
Add Literal k to FSRn
Move Indirect FSRn to W with pre/post inc/dec
modifier, mm
Move INDFn to W, Indexed Indirect.
Move W to Indirect FSRn with pre/post inc/dec
modifier, mm
Move W to INDFn, Indexed Indirect.
11
00
10
00
10
00
11
00
001k
0000
0kkk
0000
1kkk
0000
0100
0000
kkkk
0000
kkkk
0000
kkkk
0000
kkkk
0000
kkkk
1011
kkkk
1010
kkkk
1001
kkkk
1000
00
00
00
00
00
00
0000
0000
0000
0000
0000
0000
0110
0000
0110
0000
0110
0110
0100 TO, PD
0000
0010
0001
0011 TO, PD
0fff
INHERENT OPERATIONS
1
1
1
1
1
1
C-COMPILER OPTIMIZED
k[n]
Note 1:
2:
3:
1
1
11
00
0001 0nkk kkkk
0000 0001 0nmm Z
2, 3
1
1
11
00
1111 0nkk kkkk Z
0000 0001 1nmm
2
2, 3
1
11
1111 1nkk kkkk
2
If the Program Counter (PC) is modified, or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
If this instruction addresses an INDF register and the MSb of the corresponding FSR is set, this instruction will require
one additional instruction cycle.
See Table in the MOVIW and MOVWI instruction descriptions.
DS40001722C-page 254
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
25.2
Instruction Descriptions
ADDFSR
Add Literal to FSRn
ANDLW
AND literal with W
Syntax:
[ label ] ADDFSR FSRn, k
Syntax:
[ label ] ANDLW
Operands:
-32  k  31
n  [ 0, 1]
Operands:
0  k  255
Operation:
FSR(n) + k  FSR(n)
Status Affected:
None
Description:
The signed 6-bit literal ‘k’ is added to
the contents of the FSRnH:FSRnL
register pair.
k
Operation:
(W) .AND. (k)  (W)
Status Affected:
Z
Description:
The contents of W register are
AND’ed with the 8-bit literal ‘k’. The
result is placed in the W register.
ANDWF
AND W with f
FSRn is limited to the range
0000h-FFFFh. Moving beyond these
bounds will cause the FSR to
wrap-around.
ADDLW
Add literal and W
Syntax:
[ label ] ADDLW
Operands:
0  k  255
Operation:
Status Affected:
Syntax:
[ label ] ANDWF
Operands:
0  f  127
d 0,1
(W) + k  (W)
Operation:
(W) .AND. (f)  (destination)
C, DC, Z
Status Affected:
Z
Description:
The contents of the W register are
added to the 8-bit literal ‘k’ and the
result is placed in the W register.
Description:
AND the W register with register ‘f’. If
‘d’ is ‘0’, the result is stored in the W
register. If ‘d’ is ‘1’, the result is stored
back in register ‘f’.
ASRF
Arithmetic Right Shift
ADDWF
Add W and f
Syntax:
[ label ] ADDWF
Operands:
0  f  127
d 0,1
Operation:
(W) + (f)  (destination)
Status Affected:
C, DC, Z
Description:
Add the contents of the W register
with register ‘f’. If ‘d’ is ‘0’, the result is
stored in the W register. If ‘d’ is ‘1’, the
result is stored back in register ‘f’.
ADDWFC
k
f,d
ADD W and CARRY bit to f
Syntax:
[ label ] ADDWFC
Operands:
0  f  127
d [0,1]
Operation:
(W) + (f) + (C)  dest
Syntax:
[ label ] ASRF
Operands:
0  f  127
d [0,1]
f {,d}
Operation:
(f<7>) dest<7>
(f<7:1>)  dest<6:0>,
(f<0>)  C,
Status Affected:
C, Z
Description:
The contents of register ‘f’ are shifted
one bit to the right through the Carry
flag. The MSb remains unchanged. If
‘d’ is ‘0’, the result is placed in W. If ‘d’
is ‘1’, the result is stored back in
register ‘f’.
register f
C
f {,d}
Status Affected:
C, DC, Z
Description:
Add W, the Carry flag and data memory location ‘f’. If ‘d’ is ‘0’, the result is
placed in W. If ‘d’ is ‘1’, the result is
placed in data memory location ‘f’.
 2013-2015 Microchip Technology Inc.
f,d
DS40001722C-page 255
PIC16(L)F1703/7
BCF
Bit Clear f
Syntax:
[ label ] BCF
BTFSC
f,b
Bit Test f, Skip if Clear
Syntax:
[ label ] BTFSC f,b
0  f  127
0b7
Operands:
0  f  127
0b7
Operands:
Operation:
0  (f<b>)
Operation:
skip if (f<b>) = 0
Status Affected:
None
Status Affected:
None
Description:
Bit ‘b’ in register ‘f’ is cleared.
Description:
If bit ‘b’ in register ‘f’ is ‘1’, the next
instruction is executed.
If bit ‘b’, in register ‘f’, is ‘0’, the next
instruction is discarded, and a NOP is
executed instead, making this a
2-cycle instruction.
BRA
Relative Branch
BTFSS
Bit Test f, Skip if Set
Syntax:
[ label ] BRA label
[ label ] BRA $+k
Syntax:
[ label ] BTFSS f,b
Operands:
0  f  127
0b<7
Operands:
-256  label - PC + 1  255
-256  k  255
Operation:
skip if (f<b>) = 1
Operation:
(PC) + 1 + k  PC
Status Affected:
None
Status Affected:
None
Description:
Description:
Add the signed 9-bit literal ‘k’ to the
PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 1 + k. This instruction is a
2-cycle instruction. This branch has a
limited range.
If bit ‘b’ in register ‘f’ is ‘0’, the next
instruction is executed.
If bit ‘b’ is ‘1’, then the next instruction
is discarded and a NOP is executed
instead, making this a 2-cycle
instruction.
BRW
Relative Branch with W
Syntax:
[ label ] BRW
Operands:
None
Operation:
(PC) + (W)  PC
Status Affected:
None
Description:
Add the contents of W (unsigned) to
the PC. Since the PC will have
incremented to fetch the next
instruction, the new address will be
PC + 1 + (W). This instruction is a
2-cycle instruction.
BSF
Bit Set f
Syntax:
[ label ] BSF
Operands:
0  f  127
0b7
Operation:
1  (f<b>)
Status Affected:
None
Description:
Bit ‘b’ in register ‘f’ is set.
DS40001722C-page 256
f,b
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
CALL
Call Subroutine
CLRWDT
Clear Watchdog Timer
Syntax:
[ label ] CALL k
Syntax:
[ label ] CLRWDT
Operands:
0  k  2047
Operands:
None
Operation:
(PC)+ 1 TOS,
k  PC<10:0>,
(PCLATH<6:3>)  PC<14:11>
Operation:
Status Affected:
None
00h  WDT
0  WDT prescaler,
1  TO
1  PD
Description:
Call Subroutine. First, return address
(PC + 1) is pushed onto the stack.
The 11-bit immediate address is
loaded into PC bits <10:0>. The upper
bits of the PC are loaded from
PCLATH. CALL is a 2-cycle
instruction.
Status Affected:
TO, PD
Description:
CLRWDT instruction resets the Watchdog Timer. It also resets the prescaler
of the WDT. Status bits TO and PD
are set.
CALLW
Subroutine Call With W
COMF
Complement f
Syntax:
[ label ] CALLW
Syntax:
[ label ] COMF
Operands:
None
Operands:
Operation:
(PC) +1  TOS,
(W)  PC<7:0>,
(PCLATH<6:0>) PC<14:8>
0  f  127
d  [0,1]
Operation:
(f)  (destination)
Status Affected:
Z
Description:
The contents of register ‘f’ are
complemented. If ‘d’ is ‘0’, the result is
stored in W. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
DECF
Decrement f
Syntax:
[ label ] DECF f,d
Status Affected:
None
Description:
Subroutine call with W. First, the
return address (PC + 1) is pushed
onto the return stack. Then, the
contents of W is loaded into PC<7:0>,
and the contents of PCLATH into
PC<14:8>. CALLW is a 2-cycle
instruction.
CLRF
Clear f
Syntax:
[ label ] CLRF
f
f,d
Operands:
0  f  127
Operands:
Operation:
00h  (f)
1Z
0  f  127
d  [0,1]
Operation:
(f) - 1  (destination)
Status Affected:
Z
Status Affected:
Z
Description:
The contents of register ‘f’ are cleared
and the Z bit is set.
Description:
Decrement register ‘f’. If ‘d’ is ‘0’, the
result is stored in the W register. If ‘d’
is ‘1’, the result is stored back in
register ‘f’.
CLRW
Clear W
Syntax:
[ label ] CLRW
Operands:
None
Operation:
00h  (W)
1Z
Status Affected:
Z
Description:
W register is cleared. Zero bit (Z) is
set.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 257
PIC16(L)F1703/7
DECFSZ
Decrement f, Skip if 0
INCFSZ
Increment f, Skip if 0
Syntax:
[ label ] DECFSZ f,d
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
Operands:
0  f  127
d  [0,1]
Operation:
(f) - 1  (destination);
skip if result = 0
Operation:
(f) + 1  (destination),
skip if result = 0
Status Affected:
None
Status Affected:
None
Description:
The contents of register ‘f’ are decremented. If ‘d’ is ‘0’, the result is placed
in the W register. If ‘d’ is ‘1’, the result
is placed back in register ‘f’.
If the result is ‘1’, the next instruction is
executed. If the result is ‘0’, then a
NOP is executed instead, making it a
2-cycle instruction.
Description:
The contents of register ‘f’ are incremented. If ‘d’ is ‘0’, the result is placed
in the W register. If ‘d’ is ‘1’, the result
is placed back in register ‘f’.
If the result is ‘1’, the next instruction is
executed. If the result is ‘0’, a NOP is
executed instead, making it a 2-cycle
instruction.
GOTO
Unconditional Branch
IORLW
Inclusive OR literal with W
Syntax:
[ label ]
Syntax:
[ label ]
GOTO k
INCFSZ f,d
IORLW k
Operands:
0  k  2047
Operands:
0  k  255
Operation:
k  PC<10:0>
PCLATH<6:3>  PC<14:11>
Operation:
(W) .OR. k  (W)
Status Affected:
Z
Status Affected:
None
Description:
Description:
GOTO is an unconditional branch. The
11-bit immediate value is loaded into
PC bits <10:0>. The upper bits of PC
are loaded from PCLATH<4:3>. GOTO
is a 2-cycle instruction.
The contents of the W register are
OR’ed with the 8-bit literal ‘k’. The
result is placed in the W register.
INCF
Increment f
IORWF
Inclusive OR W with f
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
Operands:
0  f  127
d  [0,1]
Operation:
(f) + 1  (destination)
Operation:
(W) .OR. (f)  (destination)
Status Affected:
Z
Status Affected:
Z
Description:
The contents of register ‘f’ are incremented. If ‘d’ is ‘0’, the result is placed
in the W register. If ‘d’ is ‘1’, the result
is placed back in register ‘f’.
Description:
Inclusive OR the W register with register ‘f’. If ‘d’ is ‘0’, the result is placed in
the W register. If ‘d’ is ‘1’, the result is
placed back in register ‘f’.
DS40001722C-page 258
INCF f,d
IORWF
f,d
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
LSLF
Logical Left Shift
MOVF
f {,d}
Move f
Syntax:
[ label ] LSLF
Syntax:
[ label ]
Operands:
0  f  127
d [0,1]
Operands:
0  f  127
d  [0,1]
Operation:
(f<7>)  C
(f<6:0>)  dest<7:1>
0  dest<0>
Operation:
(f)  (dest)
Status Affected:
C, Z
Description:
The contents of register ‘f’ are shifted
one bit to the left through the Carry flag.
A ‘0’ is shifted into the LSb. If ‘d’ is ‘0’,
the result is placed in W. If ‘d’ is ‘1’, the
result is stored back in register ‘f’.
C
register f
0
Status Affected:
Z
Description:
The contents of register f is moved to
a destination dependent upon the
status of d. If d = 0, destination is W
register. If d = 1, the destination is file
register f itself. d = 1 is useful to test a
file register since status flag Z is
affected.
Words:
1
Cycles:
1
Example:
Logical Right Shift
Syntax:
[ label ] LSRF
Operands:
0  f  127
d [0,1]
Operation:
0  dest<7>
(f<7:1>)  dest<6:0>,
(f<0>)  C,
Status Affected:
C, Z
Description:
The contents of register ‘f’ are shifted
one bit to the right through the Carry
flag. A ‘0’ is shifted into the MSb. If ‘d’ is
‘0’, the result is placed in W. If ‘d’ is ‘1’,
the result is stored back in register ‘f’.
f {,d}
register f
 2013-2015 Microchip Technology Inc.
MOVF
FSR, 0
After Instruction
W = value in FSR register
Z = 1
LSRF
0
MOVF f,d
C
DS40001722C-page 259
PIC16(L)F1703/7
MOVIW
Move INDFn to W
Syntax:
[ label ] MOVIW ++FSRn
[ label ] MOVIW --FSRn
[ label ] MOVIW FSRn++
[ label ] MOVIW FSRn-[ label ] MOVIW k[FSRn]
Operands:
n  [0,1]
mm  [00,01, 10, 11]
-32  k  31
Operation:
INDFn  W
Effective address is determined by
• FSR + 1 (preincrement)
• FSR - 1 (predecrement)
• FSR + k (relative offset)
After the Move, the FSR value will be
either:
• FSR + 1 (all increments)
• FSR - 1 (all decrements)
• Unchanged
Status Affected:
MOVLP
Syntax:
[ label ] MOVLP k
Operands:
0  k  127
Operation:
k  PCLATH
Status Affected:
None
Description:
The 7-bit literal ‘k’ is loaded into the
PCLATH register.
MOVLW
Move literal to W
Syntax:
[ label ]
0  k  255
Operation:
k  (W)
Status Affected:
None
Description:
The 8-bit literal ‘k’ is loaded into W register. The “don’t cares” will assemble as
‘0’s.
Words:
1
1
Mode
Syntax
mm
Cycles:
Preincrement
++FSRn
00
Example:
--FSRn
01
Postincrement
FSRn++
10
Postdecrement
FSRn--
11
Description:
This instruction is used to move data
between W and one of the indirect
registers (INDFn). Before/after this
move, the pointer (FSRn) is updated by
pre/post incrementing/decrementing it.
Note: The INDFn registers are not
physical registers. Any instruction that
accesses an INDFn register actually
accesses the register at the address
specified by the FSRn.
FSRn is limited to the range 0000h FFFFh. Incrementing/decrementing it
beyond these bounds will cause it to
wrap-around.
MOVLB
Move literal to BSR
Syntax:
[ label ] MOVLB k
Operands:
0  k  31
Operation:
k  BSR
Status Affected:
None
Description:
The 5-bit literal ‘k’ is loaded into the
Bank Select Register (BSR).
DS40001722C-page 260
MOVLW k
Operands:
Z
Predecrement
Move literal to PCLATH
MOVLW
0x5A
After Instruction
W =
MOVWF
Move W to f
Syntax:
[ label ]
MOVWF
Operands:
0  f  127
Operation:
(W)  (f)
0x5A
f
Status Affected:
None
Description:
Move data from W register to register
‘f’.
Words:
1
Cycles:
1
Example:
MOVWF
OPTION_REG
Before Instruction
OPTION_REG = 0xFF
W = 0x4F
After Instruction
OPTION_REG = 0x4F
W = 0x4F
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
MOVWI
Move W to INDFn
Syntax:
[ label ] MOVWI ++FSRn
[ label ] MOVWI --FSRn
[ label ] MOVWI FSRn++
[ label ] MOVWI FSRn-[ label ] MOVWI k[FSRn]
Operands:
Operation:
Status Affected:
n  [0,1]
mm  [00,01, 10, 11]
-32  k  31
W  INDFn
Effective address is determined by
• FSR + 1 (preincrement)
• FSR - 1 (predecrement)
• FSR + k (relative offset)
After the Move, the FSR value will be
either:
• FSR + 1 (all increments)
• FSR - 1 (all decrements)
Unchanged
None
No Operation
Syntax:
[ label ]
Operands:
None
Operation:
No operation
Status Affected:
None
Description:
No operation.
Words:
1
Cycles:
1
Example:
OPTION
Load OPTION_REG Register
with W
Syntax:
[ label ] OPTION
Operands:
None
Operation:
(W)  OPTION_REG
Status Affected:
None
Description:
Move data from W register to
OPTION_REG register.
1
Syntax
Preincrement
++FSRn
00
Predecrement
--FSRn
01
Postincrement
FSRn++
10
Words:
Postdecrement
FSRn--
11
Cycles:
1
Example:
OPTION
Before Instruction
OPTION_REG = 0xFF
W = 0x4F
After Instruction
OPTION_REG = 0x4F
W = 0x4F
This instruction is used to move data
between W and one of the indirect
registers (INDFn). Before/after this
move, the pointer (FSRn) is updated by
pre/post incrementing/decrementing it.
Note: The INDFn registers are not
physical registers. Any instruction that
accesses an INDFn register actually
accesses the register at the address
specified by the FSRn.
FSRn is limited to the range
0000h-FFFFh.
Incrementing/decrementing it beyond
these bounds will cause it to
wrap-around.
The increment/decrement operation on
FSRn WILL NOT affect any Status bits.
 2013-2015 Microchip Technology Inc.
NOP
NOP
Mode
Description:
mm
NOP
RESET
Software Reset
Syntax:
[ label ] RESET
Operands:
None
Operation:
Execute a device Reset. Resets the
RI flag of the PCON register.
Status Affected:
None
Description:
This instruction provides a way to
execute a hardware Reset by
software.
DS40001722C-page 261
PIC16(L)F1703/7
RETFIE
Return from Interrupt
RETURN
Return from Subroutine
Syntax:
[ label ]
Syntax:
[ label ]
None
RETFIE k
RETURN
Operands:
None
Operands:
Operation:
TOS  PC,
1  GIE
Operation:
TOS  PC
Status Affected:
None
Status Affected:
None
Description:
Description:
Return from Interrupt. Stack is POPed
and Top-of-Stack (TOS) is loaded in
the PC. Interrupts are enabled by
setting Global Interrupt Enable bit,
GIE (INTCON<7>). This is a 2-cycle
instruction.
Return from subroutine. The stack is
POPed and the top of the stack (TOS)
is loaded into the program counter.
This is a 2-cycle instruction.
Words:
1
Cycles:
2
Example:
RETFIE
After Interrupt
PC =
GIE =
TOS
1
RETLW
Return with literal in W
Syntax:
[ label ]
Operands:
0  k  255
Operation:
k  (W);
TOS  PC
Status Affected:
None
Description:
The W register is loaded with the 8-bit
literal ‘k’. The program counter is
loaded from the top of the stack (the
return address). This is a 2-cycle
instruction.
Words:
1
Cycles:
2
Example:
TABLE
RETLW k
RLF
Rotate Left f through Carry
Syntax:
[ label ]
Operands:
0  f  127
d  [ 0, 1]
Operation:
See description below
Status Affected:
C
Description:
The contents of register ‘f’ are rotated
one bit to the left through the Carry
flag. If ‘d’ is ‘0’, the result is placed in
the W register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
RLF
C
CALL TABLE;W contains table
;offset value
•
;W now has table value
•
•
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
•
•
•
RETLW kn ; End of table
Before Instruction
W =
After Instruction
W =
DS40001722C-page 262
Words:
1
Cycles:
1
Example:
RLF
f,d
Register f
REG1,0
Before Instruction
REG1
C
After Instruction
REG1
W
C
=
=
1110 0110
0
=
=
=
1110 0110
1100 1100
1
0x07
value of k8
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
SUBLW
Subtract W from literal
Syntax:
[ label ]
RRF
Rotate Right f through Carry
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
Operands:
0 k 255
Operation:
k - (W) W)
Operation:
See description below
Status Affected:
C, DC, Z
Status Affected:
C
Description:
Description:
The contents of register ‘f’ are rotated
one bit to the right through the Carry
flag. If ‘d’ is ‘0’, the result is placed in
the W register. If ‘d’ is ‘1’, the result is
placed back in register ‘f’.
The W register is subtracted (2’s
complement method) from the 8-bit
literal ‘k’. The result is placed in the W
register.
RRF f,d
C
Register f
SUBLW k
C=0
Wk
C=1
Wk
DC = 0
W<3:0>  k<3:0>
DC = 1
W<3:0>  k<3:0>
SLEEP
Enter Sleep mode
SUBWF
Subtract W from f
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0 f 127
d  [0,1]
Operation:
(f) - (W) destination)
Status Affected:
C, DC, Z
Description:
Subtract (2’s complement method) W
register from register ‘f’. If ‘d’ is ‘0’, the
result is stored in the W
register. If ‘d’ is ‘1’, the result is stored
back in register ‘f.
SLEEP
Operands:
None
Operation:
00h  WDT,
0  WDT prescaler,
1  TO,
0  PD
Status Affected:
TO, PD
Description:
The power-down Status bit, PD is
cleared. Time-out Status bit, TO is
set. Watchdog Timer and its
prescaler are cleared.
The processor is put into Sleep mode
with the oscillator stopped.
 2013-2015 Microchip Technology Inc.
SUBWF f,d
C=0
Wf
C=1
Wf
DC = 0
W<3:0>  f<3:0>
DC = 1
W<3:0>  f<3:0>
SUBWFB
Subtract W from f with Borrow
Syntax:
SUBWFB
Operands:
0  f  127
d  [0,1]
Operation:
(f) – (W) – (B) dest
f {,d}
Status Affected:
C, DC, Z
Description:
Subtract W and the BORROW flag
(CARRY) from register ‘f’ (2’s
complement method). If ‘d’ is ‘0’, the
result is stored in W. If ‘d’ is ‘1’, the
result is stored back in register ‘f’.
DS40001722C-page 263
PIC16(L)F1703/7
SWAPF
Swap Nibbles in f
XORLW
Exclusive OR literal with W
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
Operation:
SWAPF f,d
(f<3:0>)  (destination<7:4>),
(f<7:4>)  (destination<3:0>)
Status Affected:
None
Description:
The upper and lower nibbles of
register ‘f’ are exchanged. If ‘d’ is ‘0’,
the result is placed in the W register. If
‘d’ is ‘1’, the result is placed in register
‘f’.
Operands:
0 k 255
Operation:
(W) .XOR. k W)
Status Affected:
Z
Description:
The contents of the W register are
XOR’ed with the 8-bit literal ‘k’. The
result is placed in the W register.
XORWF
TRIS
Load TRIS Register with W
XORLW k
Exclusive OR W with f
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
XORWF
f,d
(W) .XOR. (f) destination)
Syntax:
[ label ] TRIS f
Operands:
5f7
Operation:
Operation:
(W)  TRIS register ‘f’
Status Affected:
Z
Status Affected:
None
Description:
Description:
Move data from W register to TRIS
register.
When ‘f’ = 5, TRISA is loaded.
When ‘f’ = 6, TRISB is loaded.
When ‘f’ = 7, TRISC is loaded.
Exclusive OR the contents of the W
register with register ‘f’. If ‘d’ is ‘0’, the
result is stored in the W register. If ‘d’
is ‘1’, the result is stored back in
register ‘f’.
DS40001722C-page 264
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
26.0
ELECTRICAL SPECIFICATIONS
26.1
Absolute Maximum Ratings(†)
Ambient temperature under bias...................................................................................................... -40°C to +125°C
Storage temperature ........................................................................................................................ -65°C to +150°C
Voltage on pins with respect to VSS
on VDD pin
PIC16F1703/7 ........................................................................................................... -0.3V to +6.5V
PIC16LF1703/7 ......................................................................................................... -0.3V to +4.0V
on MCLR pin ........................................................................................................................... -0.3V to +9.0V
on all other pins ............................................................................................................ -0.3V to (VDD + 0.3V)
Maximum current
on VSS pin(1)
-40°C  TA  +85°C .............................................................................................................. 250 mA
+85°C  TA  +125°C ............................................................................................................. 85 mA
on VDD pin(1)
-40°C  TA  +85°C .............................................................................................................. 250 mA
+85°C  TA  +125°C ............................................................................................................. 85 mA
sunk by any I/O pin ............................................................................................................................... 50 mA
sourced by any I/O pin ........................................................................................................................... 50 mA
sourced by any Op Amp output pin ...................................................................................................... 100 mA
Clamp current, IK (VPIN < 0 or VPIN > VDD) ................................................................................................... 20 mA
Total power dissipation(2) ............................................................................................................................. 800 mW
Note 1:
2:
Maximum current rating requires even load distribution across I/O pins. Maximum current rating may be
limited by the device package power dissipation characterizations, see Table 26-6 to calculate device
specifications.
Power dissipation is calculated as follows: PDIS = VDD x {IDD –  IOH} +  {(VDD – VOH) x IOH} + (VOl x
IOL).
† 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 above maximum rating conditions for
extended periods may affect device reliability.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 265
PIC16(L)F1703/7
26.2
Standard Operating Conditions
The standard operating conditions for any device are defined as:
Operating Voltage:
Operating Temperature:
VDDMIN VDD VDDMAX
TA_MIN TA TA_MAX
VDD — Operating Supply Voltage(1)
PIC16LF1703/7
VDDMIN (Fosc  16 MHz).......................................................................................................... +1.8V
VDDMIN (Fosc 16 MHz).......................................................................................................... +2.5V
VDDMAX .................................................................................................................................... +3.6V
PIC16F1703/7
VDDMIN (Fosc  16 MHz).......................................................................................................... +2.3V
VDDMIN (Fosc 16 MHz).......................................................................................................... +2.5V
VDDMAX .................................................................................................................................... +5.5V
TA — Operating Ambient Temperature Range
Industrial Temperature
TA_MIN ...................................................................................................................................... -40°C
TA_MAX .................................................................................................................................... +85°C
Extended Temperature
TA_MIN ...................................................................................................................................... -40°C
TA_MAX .................................................................................................................................. +125°C
Note 1:
See Parameter D001, DS Characteristics: Supply Voltage.
DS40001722C-page 266
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
VOLTAGE FREQUENCY GRAPH, -40°C  TA +125°C, PIC16F1703/7 ONLY
FIGURE 26-1:
VDD (V)
5.5
2.5
2.3
0
10
4
16
32
Frequency (MHz)
Note 1: The shaded region indicates the permissible combinations of voltage and frequency.
2: Refer to Table 26-7 for each Oscillator mode’s supported frequencies.
VOLTAGE FREQUENCY GRAPH, -40°C  TA +125°C, PIC16LF1703/7 ONLY
VDD (V)
FIGURE 26-2:
3.6
2.5
1.8
0
4
10
16
32
Frequency (MHz)
Note 1: The shaded region indicates the permissible combinations of voltage and frequency.
2: Refer to Table 26-7 for each Oscillator mode’s supported frequencies.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 267
PIC16(L)F1703/7
26.3
DC Characteristics
TABLE 26-1:
SUPPLY VOLTAGE
PIC16LF1703/7
Standard Operating Conditions (unless otherwise stated)
PIC16F1703/7
Param.
No.
D001
Sym.
VDD
Characteristic
Typ†
Max.
Units
VDDMIN
1.8
2.5
—
—
VDDMAX
3.6
3.6
V
V
FOSC  16 MHz
FOSC  32 MHz (Note 2)
2.3
2.5
—
—
5.5
5.5
V
V
FOSC  16 MHz:
FOSC  32 MHz (Note 2)
1.5
—
—
V
Device in Sleep mode
1.7
—
—
V
Device in Sleep mode
—
1.6
—
V
—
1.6
—
V
—
0.8
—
V
—
1.5
—
V
1x (1.024 typical)
-4
—
+4
%
VDD 2.5V, -40°C to +85°C
2x (2.048 typical)
-4
—
+4
%
VDD 2.5V, -40°C to +85°C
4x (4.096 typical)
-5
—
+5
%
VDD 4.75V, -40°C to +85°C
0.05
—
—
PIC16F1703/7
VDR
RAM Data Retention Voltage(1)
D002*
D002A* VPOR
Conditions
Supply Voltage
D001
D002*
Min.
Power-on Reset Release Voltage(3)
D002A*
D002B* VPORR* Power-on Reset Rearm Voltage(3)
D002B*
D003
D004*
VFVR
SVDD
Fixed Voltage Reference
Voltage
VDD Rise Rate(2)
V/ms Ensures that the Power-on Reset
signal is released properly.
* These parameters are characterized but not tested.
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.
Note 1: This is the limit to which VDD can be lowered in Sleep mode without losing RAM data.
2: PLL required for 32 MHz operation.
3: See Figure 26-3: POR and POR Rearm with Slow Rising VDD.
DS40001722C-page 268
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 26-3:
POR AND POR REARM WITH SLOW RISING VDD
VDD
VPOR
VPORR
SVDD
VSS
NPOR(1)
POR REARM
VSS
TVLOW(2)
Note 1:
2:
3:
TPOR(3)
When NPOR is low, the device is held in Reset.
TPOR 1 s typical.
TVLOW 2.7 s typical.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 269
PIC16(L)F1703/7
TABLE 26-2:
SUPPLY CURRENT (IDD)(1,2)
PIC16LF1703/7
(unless otherwise stated)
Standard Operating Conditions
PIC16F1703/7
Param
No.
Device
Characteristics
LDO Regulator
D009
D014
D014
D015
D015
D017
D017
D019
D019
D020
D020
Conditions
Min.
Typ†
Max.
Units
VDD
Note
—
75
—
A
—
High-Power mode, normal operation
—
15
—
A
—
Sleep, VREGCON<1> = 0
—
0.3
—
A
—
Sleep, VREGCON<1> = 1
—
120
180
A
1.8
—
210
300
A
3.0
FOSC = 4 MHz,
External Clock (ECM),
Medium-Power mode
—
185
280
A
2.3
—
245
350
A
3.0
—
305
420
A
5.0
—
1.6
2.3
mA
3.0
—
2
2.6
mA
3.6
—
2
2.3
mA
3.0
—
2
2.5
mA
5.0
—
115
170
A
1.8
—
135
200
A
3.0
—
150
200
A
2.3
—
170
220
A
3.0
—
215
280
A
5.0
—
0.7
0.9
mA
1.8
—
1.2
1.4
mA
3.0
—
0.9
1.1
mA
2.3
—
1.1
1.5
mA
3.0
—
1.2
1.6
mA
5.0
—
2
2.5
mA
3.0
—
2.4
3.0
mA
3.6
—
2
2.6
mA
3.0
—
2.2
2.8
mA
5.0
FOSC = 4 MHz,
External Clock (ECM),
Medium-Power mode
FOSC = 32 MHz,
External Clock (ECH),
High-Power mode (Note 3)
FOSC = 32 MHz,
External Clock (ECH),
High-Power mode (Note 3)
FOSC = 500 kHz,
MFINTOSC mode
FOSC = 500 kHz,
MFINTOSC mode
FOSC = 16 MHz,
HFINTOSC mode
FOSC = 16 MHz,
HFINTOSC mode
FOSC = 32 MHz,
HFINTOSC mode (Note 3)
FOSC = 32 MHz,
HFINTOSC mode (Note 3)
†
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
Note 1: The test conditions for all IDD measurements in active operation mode are: all I/O pins tri-stated, pulled to VDD; MCLR =
VDD; WDT disabled.
2: 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.
3: 8 MHz clock with 4x PLL enabled.
DS40001722C-page 270
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 26-3:
POWER-DOWN CURRENTS (IPD)(1,2)
PIC16LF1703/7
Operating Conditions: (unless otherwise stated)
Low-Power Sleep Mode
PIC16F1703/7
Low-Power Sleep Mode, VREGPM = 1
Param
No.
Device Characteristics
D022
Base IPD
D022
Base IPD
D022A
Base IPD
D024
D024
D025
D025
Conditions
Min.
Typ†
Max.
+85°C
Max.
+125°C
Units
—
0.05
1.0
8.0
A
1.8
—
0.08
2.0
9.0
A
3.0
—
0.3
3
11
A
2.3
—
0.4
4
12
A
3.0
—
0.5
6
15
A
5.0
—
9.8
16
18
A
2.3
—
10.3
18
20
A
3.0
Note
VDD
—
11.5
21
26
A
5.0
—
0.5
6
14
A
1.8
—
0.8
7
17
A
3.0
—
0.8
6
15
A
2.3
—
0.9
7
20
A
3.0
—
1.0
8
22
A
5.0
—
15
28
30
A
1.8
—
18
30
33
A
3.0
—
18
33
35
A
2.3
—
19
35
37
A
3.0
WDT, BOR and FVR
disabled, all Peripherals Inactive
WDT, BOR and FVR
disabled, all Peripherals Inactive,
Low-Power Sleep mode
VREGPM = 1
WDT, BOR and FVR
disabled, all Peripherals inactive,
Normal-Power Sleep mode
WDT Current
WDT Current
FVR Current
FVR Current
—
20
37
39
A
5.0
D026
—
7.5
25
28
A
3.0
BOR Current
D026
—
10
25
28
A
3.0
BOR Current
—
12
28
31
A
5.0
D027
—
0.5
4
10
A
3.0
LPBOR Current
D027
—
0.8
6
14
A
3.0
LPBOR Current
—
1
8
17
A
5.0
—
0.05
2
9
A
1.8
—
0.08
3
10
A
3.0
—
0.3
4
12
A
2.3
—
0.4
5
13
A
3.0
D029
D029
D030
D030
*
†
Note 1:
2:
3:
—
0.5
7
16
A
5.0
—
250
—
—
A
1.8
—
250
—
—
A
3.0
—
280
—
—
A
2.3
—
280
—
—
A
3.0
—
280
—
—
A
5.0
ADC Current (Note 3),
no conversion in progress
ADC Current (Note 3),
no conversion in progress
ADC Current (Note 3),
conversion in progress
ADC Current (Note 3),
conversion in progress
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
The peripheral current is the sum of the base IPD and the additional current consumed when this peripheral is enabled.
The peripheral  current can be determined by subtracting the base IDD or IPD current from this limit. Max values should
be used when calculating total current consumption.
The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured with
the part in Sleep mode, with all I/O pins in high-impedance state and tied to VSS.
ADC clock source is FRC.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 271
PIC16(L)F1703/7
TABLE 26-3:
POWER-DOWN CURRENTS (IPD)(1,2) (CONTINUED)
PIC16LF1703/7
Operating Conditions: (unless otherwise stated)
Low-Power Sleep Mode
PIC16F1703/7
Low-Power Sleep Mode, VREGPM = 1
Param
No.
Device Characteristics
Min.
Typ†
Conditions
Max.
+85°C
Max.
+125°C
Units
VDD
Note
D031
—
250
650
—
A
3.0
Op Amp (High-power)
D031
—
250
650
—
A
3.0
Op Amp (High-power)
—
350
850
—
A
5.0
*
†
Note 1:
2:
3:
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
The peripheral current is the sum of the base IPD and the additional current consumed when this peripheral is enabled.
The peripheral  current can be determined by subtracting the base IDD or IPD current from this limit. Max values should
be used when calculating total current consumption.
The power-down current in Sleep mode does not depend on the oscillator type. Power-down current is measured with
the part in Sleep mode, with all I/O pins in high-impedance state and tied to VSS.
ADC clock source is FRC.
DS40001722C-page 272
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 26-4:
I/O PORTS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
VIL
Characteristic
Min.
Typ†
Max.
Units
—
—
with Schmitt Trigger buffer
Conditions
—
0.8
V
4.5V  VDD  5.5V
—
0.15 VDD
V
1.8V  VDD  4.5V
—
—
0.2 VDD
V
2.0V  VDD  5.5V
with I2C levels
—
—
0.3 VDD
V
with SMBus levels
—
—
0.8
V
—
—
0.2 VDD
V
Input Low Voltage
I/O PORT:
D034
with TTL buffer
D034A
D035
D036
MCLR
VIH
2.7V  VDD  5.5V
Input High Voltage
I/O ports:
D040
2.0
—
—
V
4.5V  VDD 5.5V
0.25 VDD +
0.8
—
—
V
1.8V  VDD  4.5V
with Schmitt Trigger buffer
0.8 VDD
—
—
V
2.0V  VDD  5.5V
with I2C levels
0.7 VDD
—
—
V
with TTL buffer
D040A
D041
with SMBus levels
D042
MCLR
IIL
D060
MCLR(2)
IPUR
Weak Pull-up Current
VOL
Output Low Voltage
D070*
D080
—
—
V
—
—
V
—
±5
± 125
nA
VSS  VPIN  VDD,
Pin at high-impedance, 85°C
—
±5
± 1000
nA
VSS  VPIN  VDD,
Pin at high-impedance, 125°C
—
± 50
± 200
nA
VSS  VPIN  VDD,
Pin at high-impedance, 85°C
25
100
200
A
VDD = 3.0V, VPIN = VSS
—
—
0.6
V
IOL = -8mA, VDD = 5V
IOL = -6mA, VDD = 3.3V
IOL = -1.8mA, VDD = 1.8V
VDD - 0.7
—
—
V
IOH = 3.5mA, VDD = 5V
IOH = 3mA, VDD = 3.3V
IOH = 1mA, VDD = 1.8V
—
50
pF
Input Leakage Current(1)
I/O Ports
D061
I/O ports
VOH
D090
Output High Voltage
I/O ports
CIO
D101A*
2.7V  VDD  5.5V
2.1
0.8 VDD
Capacitive Loading Specs on Output Pins
All I/O pins
—
*
†
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
Note 1: Negative current is defined as current sourced by the pin.
2: 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.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 273
PIC16(L)F1703/7
TABLE 26-5:
MEMORY PROGRAMMING SPECIFICATIONS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
Characteristic
Min.
Typ†
Max.
Units
Conditions
Program Memory
Programming Specifications
D110
VIHH
Voltage on MCLR/VPP
8.0
—
9.0
V
D111
IDDP
Supply Current during
Programming
—
—
10
mA
D112
VBE
VDD for Bulk Erase
2.7
—
VDDMAX
V
D113
VPEW
VDD for Write or Row Erase
VDDMIN
—
VDDMAX
V
D114
IPPGM
Current on MCLR/VPP during
Erase/Write
—
1.0
—
mA
D115
IDDPGM Current on VDD during
Erase/Write
—
5.0
—
mA
D121
EP
Cell Endurance
10K
—
—
E/W
D122
VPRW
VDD for Read/Write
VDDMIN
—
VDDMAX
V
D123
TIW
Self-timed Write Cycle Time
—
2
2.5
ms
D124
TRETD
Characteristic Retention
—
40
—
Year
Provided no other
specifications are violated
D125
EHEFC
High-Endurance Flash Cell
100K
—
—
E/W
-0C  TA  +60°C, Lower
byte last 128 addresses
(Note 3, Note 4)
Program Flash Memory
-40C  TA  +85C
(Note 1)
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only
and are not tested.
Note 1: Self-write and Block Erase.
2: Refer to Section Section 3.2 “High-Endurance Flash” for a more detailed discussion on data EEPROM
endurance.
3: Required only if single-supply programming is disabled.
4:
The MPLAB ICD 2 does not support variable VPP output. Circuitry to limit the ICD 2 VPP voltage must be
placed between the ICD 2 and target system when programming or debugging with the ICD 2.
DS40001722C-page 274
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PIC16(L)F1703/7
TABLE 26-6:
THERMAL CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Param
No.
TH01
TH02
TH03
TH04
TH05
Sym.
Characteristic
Typ.
Units
JA
Thermal Resistance Junction to Ambient
70.0
C/W
14-pin PDIP package
95.3
C/W
14-pin SOIC package
100.0
C/W
14-pin TSSOP package
51.5
C/W
16-pin QFN 4x4mm package
62.2
C/W
20-pin PDIP package
87.3
C/W
20-pin SSOP
77.7
C/W
20-pin SOIC package
JC
TJMAX
PD
Thermal Resistance Junction to Case
Maximum Junction Temperature
Power Dissipation
PINTERNAL Internal Power Dissipation
Conditions
43.0
C/W
20-pin QFN 4x4mm package
32.75
C/W
14-pin PDIP package
31.0
C/W
14-pin SOIC package
24.4
C/W
14-pin TSSOP package
5.4
C/W
16-pin QFN 4x4mm package
27.5
C/W
20-pin PDIP package
31.1
C/W
20-pin SSOP
23.1
C/W
20-pin SOIC package
5.3
C/W
20-pin QFN 4x4mm package
150
C
—
W
PD = PINTERNAL + PI/O
—
W
PINTERNAL = IDD x VDD(1)
TH06
PI/O
I/O Power Dissipation
—
W
PI/O =  (IOL * VOL) +  (IOH * (VDD - VOH))
TH07
PDER
Derated Power
—
W
PDER = PDMAX (TJ - TA)/JA(2)
Note 1: IDD is current to run the chip alone without driving any load on the output pins.
2: TA = Ambient Temperature, TJ = Junction Temperature
 2013-2015 Microchip Technology Inc.
DS40001722C-page 275
PIC16(L)F1703/7
26.4
AC Characteristics
Timing Parameter Symbology has been created with one of the following formats:
1. TppS2ppS
2. TppS
T
F
Frequency
Lowercase letters (pp) and their meanings:
pp
cc
CCP1
ck
CLKOUT
cs
CS
di
SDI
do
SDO
dt
Data in
io
I/O PORT
mc
MCLR
Uppercase letters and their meanings:
S
F
Fall
H
High
I
Invalid (High-impedance)
L
Low
FIGURE 26-4:
T
Time
osc
rd
rw
sc
ss
t0
t1
wr
OSC1
RD
RD or WR
SCK
SS
T0CKI
T1CKI
WR
P
R
V
Z
Period
Rise
Valid
High-impedance
LOAD CONDITIONS
Load Condition
Pin
CL
VSS
Legend: CL = 50 pF for all pins
DS40001722C-page 276
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 26-5:
CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
Q1
CLKIN
OS12
OS02
OS11
OS03
CLKOUT
(CLKOUT Mode)
Note
1:
See Table 26-10.
TABLE 26-7:
CLOCK OSCILLATOR TIMING REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Param
No.
OS01
Sym.
FOSC
Characteristic
External CLKIN Frequency(1)
Min.
Typ†
Max.
Units
Conditions
DC
—
0.5
MHz
External Clock (ECL)
DC
—
4
MHz
External Clock (ECM)
DC
—
20
MHz
External Clock (ECH)
OS02
TOSC
External CLKIN Period(1)
50
—

ns
External Clock (EC)
OS03
TCY
Instruction Cycle Time(1)
125
TCY
DC
ns
TCY = 4/FOSC
*
†
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1: Instruction cycle period (TCY) equals four 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 CLKIN pin. When an
external clock input is used, the “max” cycle time limit is “DC” (no clock) for all devices.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 277
PIC16(L)F1703/7
TABLE 26-8:
OSCILLATOR PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
Characteristic
Freq.
Tolerance
Min.
Typ†
Max.
Units
OS08
HFOSC
Internal Calibrated HFINTOSC
Frequency(1)
±2%
—
16.0
—
MHz
OS08A
MFOSC
Internal Calibrated MFINTOSC
Frequency(1)
±2%
—
500
—
kHz
OS09
LFOSC
Internal LFINTOSC Frequency
—
—
31
—
kHz
OS10*
TIOSC ST
HFINTOSC
Wake-up from Sleep Start-up Time
MFINTOSC
Wake-up from Sleep Start-up Time
—
—
3.2
8
s
—
—
24
35
s
—
—
0.5
—
ms
OS10A* TLFOSC ST
*
†
LFINTOSC
Wake-up from Sleep Start-up Time
Conditions
-40°C  TA  +125°C
-40°C  TA  +125°C
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.
Note 1: To ensure these oscillator frequency tolerances, VDD and VSS must be capacitively decoupled as close to the device as
possible. 0.1 F and 0.01 F values in parallel are recommended.
2: See Figure 27-43: LFINTOSC Frequency, PIC16LF1703/7 Only., and
Figure 27-44: LFINTOSC Frequency, PIC16F1703/7 Only..
FIGURE 26-6:
HFINTOSC FREQUENCY ACCURACY OVER DEVICE VDD AND TEMPERATURE
125
± 5%
85
Temperature (°C)
± 3%
60
± 2%
25
0
-20
-40
1.8
± 5%
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VDD (V)
DS40001722C-page 278
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 26-9:
PLL CLOCK TIMING SPECIFICATIONS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
F10
Characteristic
Min.
Typ†
Max.
Units
FOSC Oscillator Frequency Range
4
—
8
MHz
F11
FSYS
On-Chip VCO System Frequency
16
—
32
MHz
F12
TRC
PLL Start-up Time (Lock Time)
F13*
CLK
CLKOUT Stability (Jitter)
—
—
2
ms
-0.25%
—
+0.25%
%
Conditions
* These parameters are characterized but not tested.
† Data in “Typ” column is at 5V, 25C unless otherwise stated. These parameters are for design guidance
only and are not tested.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 279
PIC16(L)F1703/7
FIGURE 26-7:
CLKOUT AND I/O TIMING
Cycle
Write
Fetch
Q1
Q4
Read
Execute
Q2
Q3
FOSC
OS12
OS11
OS20
OS21
CLKOUT
OS19
OS18
OS16
OS13
OS17
I/O pin
(Input)
OS14
OS15
I/O pin
(Output)
New Value
Old Value
OS18, OS19
TABLE 26-10: CLKOUT AND I/O TIMING PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
Characteristic
Min.
Typ†
Max.
Units
Conditions
OS11*
TosH2ckL
FOSC to CLKOUT (1)
—
—
70
ns
3.3V  VDD 5.0V
OS12*
TosH2ckH
FOSC to CLKOUT (1)
—
—
72
ns
3.3V  VDD 5.0V
OS13*
TckL2ioV
CLKOUT to Port out valid
OS14*
TioV2ckH
Port input valid before CLKOUT(1)
OS15*
TosH2ioV
OS16*
(1)
—
—
20
ns
TOSC + 200 ns
—
—
ns
Fosc (Q1 cycle) to Port out valid
—
50
70*
ns
3.3V  VDD 5.0V
TosH2ioI
Fosc (Q2 cycle) to Port input invalid
(I/O in hold time)
50
—
—
ns
3.3V  VDD 5.0V
OS17*
TioV2osH
Port input valid to Fosc(Q2 cycle)
(I/O in setup time)
20
—
—
ns
OS18*
TioR
Port output rise time
—
—
40
15
72
32
ns
VDD = 1.8V
3.3V  VDD 5.0V
OS19*
TioF
Port output fall time
—
—
28
15
55
30
ns
VDD = 1.8V
3.3V  VDD 5.0V
OS20*
Tinp
INT pin input high or low time
25
—
—
ns
OS21*
Tioc
Interrupt-on-change new input level time
25
—
—
ns
* These parameters are characterized but not tested.
† Data in “Typ” column is at 3.0V, 25C unless otherwise stated.
Note 1: Measurements are taken in EXTRC mode where CLKOUT output is 4 x TOSC.
2: Slew rate limited.
DS40001722C-page 280
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PIC16(L)F1703/7
FIGURE 26-8:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING
VDD
MCLR
30
Internal
POR
33
PWRT
Time-out
32
OSC
Start-up Time
Internal Reset(1)
Watchdog Timer
Reset(1)
31
34
34
I/O pins
Note 1: Asserted low.
TABLE 26-11: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
Characteristic
Min.
Typ†
Max.
Units
Conditions
2
—
—
s
10
16
27
ms
Power-up Timer Period, PWRTE = 0
40
65
140
ms
I/O high-impedance from MCLR Low
or Watchdog Timer Reset
—
—
2.0
s
2.55
2.70
2.85
V
BORV = 0
2.30
1.80
2.45
1.90
2.60
2.10
V
V
BORV = 1 (PIC16F1703/7)
BORV = 1 (PIC16LF1703/7)
1.8
2.1
2.5
V
LPBOR = 1
0
25
75
mV
-40°C  TA  +85°C
1
3
35
s
VDD  VBOR
30
TMCL
31
TWDTLP Low-Power Watchdog Timer
Time-out Period
MCLR Pulse Width (low)
33*
TPWRT
34*
TIOZ
35
VBOR
Brown-out Reset Voltage(1)
35A
VLPBOR Low-Power Brown-out
36*
VHYST
37*
TBORDC Brown-out Reset DC Response
Time
Brown-out Reset Hysteresis
VDD = 3.3V-5V
1:16 Prescaler used
*
†
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
Note 1: To ensure these voltage tolerances, VDD and VSS must be capacitively decoupled as close to the device as
possible. 0.1 F and 0.01 F values in parallel are recommended.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 281
PIC16(L)F1703/7
FIGURE 26-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
40
41
42
T1CKI
45
46
49
47
TMR0 or
TMR1
FIGURE 26-10:
BROWN-OUT RESET TIMING AND CHARACTERISTICS
VDD
VBOR and VHYST
VBOR
(Device in Brown-out Reset)
(Device not in Brown-out Reset)
37
Reset
(due to BOR)
33(1)
Note 1: 64 ms delay only if PWRTE bit in the Configuration Word register is programmed to ‘0’;
2 ms delay if PWRTE = 0.
DS40001722C-page 282
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 26-12: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C TA +125°C
Param
No.
40*
Sym.
TT0H
Characteristic
T0CKI High Pulse Width
No Prescaler
With Prescaler
TT0L
41*
T0CKI Low Pulse Width
No Prescaler
With Prescaler
42*
TT0P
T0CKI Period
45*
TT1H
T1CKI High Synchronous, No Prescaler
Time
Synchronous, with Prescaler
TT1L
46*
Typ†
Max.
Units
0.5 TCY + 20
—
—
ns
10
—
—
ns
0.5 TCY + 20
—
—
ns
10
—
—
ns
Greater of:
20 or (TCY + 40)*N
—
—
ns
0.5 TCY + 20
—
—
ns
15
—
—
ns
Asynchronous
30
—
—
ns
T1CKI Low Synchronous, No Prescaler
Time
Synchronous, with Prescaler
0.5 TCY + 20
—
—
ns
15
—
—
ns
Asynchronous
30
—
—
ns
Greater of:
30 or (TCY + 40)*N
—
—
ns
60
—
—
ns
2 TOSC
—
7 TOSC
—
47*
TT1P
49*
TCKEZTMR1 Delay from External Clock Edge to Timer
Increment
T1CKI Input Synchronous
Period
Asynchronous
*
†
Min.
Conditions
N = prescale value
N = prescale value
Timers in Sync
mode
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 283
PIC16(L)F1703/7
FIGURE 26-11:
CAPTURE/COMPARE/PWM TIMINGS (CCP)
CCPx
(Capture mode)
CC01
CC02
CC03
Refer to Figure 26-4 for load conditions.
Note:
TABLE 26-13: CAPTURE/COMPARE/PWM REQUIREMENTS (CCP)
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C  TA  +125°C
Param
Sym.
No.
Characteristic
CC01* TccL
CCPx Input Low Time
No Prescaler
CC02* TccH
CCPx Input High Time
No Prescaler
Min.
Typ†
Max.
Units
0.5TCY + 20
—
—
ns
ns
With Prescaler
20
—
—
0.5TCY + 20
—
—
ns
20
—
—
ns
(3TCY + 40)*N
—
—
ns
With Prescaler
CC03* TccP
*
†
CCPx Input Period
Conditions
N = prescale value
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
TABLE 26-14:
ANALOG-TO-DIGITAL CONVERTER (ADC) CHARACTERISTICS(1,2,3)
Operating Conditions (unless otherwise stated)
VDD = 3.0V, TA = 25°C, Single-ended, 2 s TAD, VREF+ = 3V, VREF- = VSS
Param
Sym.
No.
Characteristic
Min.
Typ†
Max.
Units
Conditions
AD01
NR
Resolution
—
—
10
AD02
EIL
Integral Error
—
—
±1.7
bit
Differential Error
—
—
±1
—
—
±2.5
LSb VREF = 3.0V
LSb VREF = 3.0V
LSb VREF = 3.0V
AD03
EDL
AD04
EOFF Offset Error
AD05
EGN
Gain Error
—
—
±2.0
AD06
VREF Reference Voltage
1.8
—
VDD
V
AD07
VAIN
Full-Scale Range
VSS
—
VREF
V
AD08
ZAIN
Recommended Impedance of
Analog Voltage Source
—
—
10
k
*
†
Note 1:
2:
3:
LSb No missing codes, VREF = 3.0V
VREF = (VREF+ minus VREF-)
Can go higher if external 0.01F capacitor is
present on input pin.
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
The ADC conversion result never decreases with an increase in the input voltage and has no missing codes.
ADC VREF is from external VREF+ pin, VDD pin or FVR, whichever is selected as reference input.
See Section 27.0 “DC and AC Characteristics Graphs and Charts” for operating characterization.
DS40001722C-page 284
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 26-15: ADC CONVERSION REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Param
Sym.
No.
Characteristic
Min.
Typ†
Max.
Units
Conditions
ADC Clock Period (TADC)
1.0
—
9.0
s
FOSC-based
ADC Internal FRC Oscillator Period
(TFRC)
1.0
2
6.0
s
ADCS<1:0> = 11 (ADC FRC mode)
Conversion Time (not including
Acquisition Time)(1)
—
11
—
TAD
Set GO/DONE bit to conversion
complete
AD132* TACQ Acquisition Time
—
5.0
—
s
AD133* THCD Holding Capacitor Disconnect Time
—
1/2 TAD
—
ADCS<2:0>  x11 (FOSC based)
—
1/2 TAD + 1TCY
—
ADCS<2:0> = x11 (FRC based)
AD130* TAD
AD131 TCNV
*
†
These parameters are characterized but not tested.
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1: The ADRES register may be read on the following TCY cycle.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 285
PIC16(L)F1703/7
FIGURE 26-12:
ADC CONVERSION TIMING (ADC CLOCK FOSC-BASED)
BSF ADCON0, GO
AD133
1 TCY
AD131
Q4
AD130
ADC_clk
9
ADC Data
8
7
6
3
2
1
0
NEW_DATA
OLD_DATA
ADRES
1 TCY
ADIF
GO
Sample
DONE
Sampling Stopped
AD132
FIGURE 26-13:
ADC CONVERSION TIMING (ADC CLOCK FROM FRC)
BSF ADCON0, GO
AD133
1 TCY
AD131
Q4
AD130
ADC_clk
9
ADC Data
8
7
6
OLD_DATA
ADRES
2
1
0
NEW_DATA
1 TCY
ADIF
GO
Sample
3
DONE
AD132
Sampling Stopped
Note 1: If the ADC clock source is selected as FRC, a time of TCY is added before the ADC clock starts. This allows the
SLEEP instruction to be executed.
DS40001722C-page 286
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
TABLE 26-16: OPERATIONAL AMPLIFIER (OPA)
Operating Conditions (unless otherwise stated)
VDD = 3.0V, TA = 25°C, OPAxSP = 1 (High GBWP mode)
Param
No.
Symbol
OPA01*
GBWP
Parameters
Min.
Typ.
Max.
Units
Gain Bandwidth Product
—
3.5
—
MHz
OPA02*
TON
Turn-on Time
—
10
—
s
OPA03*
PM
Phase Margin
—
40
—
degrees
OPA04*
SR
Slew Rate
—
3
—
V/s
OPA05
OFF
Offset
—
±3
±9
mV
OPA06
CMRR
Common-Mode Rejection Ratio
52
70
—
dB
OPA07*
AOL
Open Loop Gain
—
90
—
dB
OPA08
VICM
Input Common-Mode Voltage
0
—
VDD
V
OPA09*
PSRR
Power Supply Rejection Ratio
—
80
—
dB
Min.
Typ.
Max.
*
Conditions
VDD > 2.5V
These parameters are characterized but not tested.
TABLE 26-17: ZERO CROSS PIN SPECIFICATIONS
Operating Conditions (unless otherwise stated)
VDD = 3.0V, TA = 25°C
Param.
No.
Sym.
Characteristics
Units
ZC01
ZCPINV
Voltage on Zero Cross Pin
—
0.75
—
V
ZC02
ZCSRC
Source current
—
—
-600
A
ZC03
ZCSNK
Sink current
600
—
—
A
ZC04
ZCISW
ZC05
ZCOUT
*
Response Time Rising Edge
—
1
—
s
Response Time Falling Edge
—
1
—
s
Response Time Rising Edge
—
1
—
s
Response Time Falling Edge
—
1
—
s
Comments
These parameters are characterized but not tested.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 287
PIC16(L)F1703/7
FIGURE 26-14:
SPI MASTER MODE TIMING (CKE = 0, SMP = 0)
SS
SP81
SCK
(CKP = 0)
SP71
SP72
SP78
SP79
SP79
SP78
SCK
(CKP = 1)
SP80
bit 6 - - - - - -1
MSb
SDO
LSb
SP75, SP76
SDI
MSb In
bit 6 - - - -1
LSb In
SP74
SP73
Note: Refer to Figure 26-4 for load conditions.
FIGURE 26-15:
SPI MASTER MODE TIMING (CKE = 1, SMP = 1)
SS
SP81
SCK
(CKP = 0)
SP71
SP72
SP79
SP73
SCK
(CKP = 1)
SP80
SDO
MSb
bit 6 - - - - - -1
SP78
LSb
SP75, SP76
SDI
MSb In
bit 6 - - - -1
LSb In
SP74
Note: Refer to Figure 26-4 for load conditions.
DS40001722C-page 288
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 26-16:
SPI SLAVE MODE TIMING (CKE = 0)
SS
SP70
SCK
(CKP = 0)
SP83
SP71
SP72
SP78
SP79
SP79
SP78
SCK
(CKP = 1)
SP80
MSb
SDO
LSb
bit 6 - - - - - -1
SP77
SP75, SP76
SDI
MSb In
bit 6 - - - -1
LSb In
SP74
SP73
Note: Refer to Figure 26-4 for load conditions.
FIGURE 26-17:
SS
SPI SLAVE MODE TIMING (CKE = 1)
SP82
SP70
SP83
SCK
(CKP = 0)
SP71
SP72
SCK
(CKP = 1)
SP80
SDO
MSb
bit 6 - - - - - -1
LSb
SP77
SP75, SP76
SDI
MSb In
bit 6 - - - -1
LSb In
SP74
Note: Refer to Figure 26-4 for load conditions.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 289
PIC16(L)F1703/7
TABLE 26-18: SPI MODE REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Symbol
Characteristic
Min.
Typ†
Max. Units
2.25 TCY
—
—
ns
SP70* TSSL2SCH,
TSSL2SCL
SS to SCK or SCK input
SP71* TSCH
SCK input high time (Slave mode)
TCY + 20
—
—
ns
SCK input low time (Slave mode)
TCY + 20
—
—
ns
SP72*
TSCL
Conditions
SP73* TDIV2SCH,
TDIV2SCL
Setup time of SDI data input to SCK
edge
100
—
—
ns
SP74* TSCH2DIL,
TSCL2DIL
Hold time of SDI data input to SCK
edge
100
—
—
ns
SP75* TDOR
SDO data output rise time
—
10
25
ns
3.0V  VDD  5.5V
—
25
50
ns
1.8V  VDD  5.5V
SP76* TDOF
SDO data output fall time
—
10
25
ns
SP77* TSSH2DOZ
SS to SDO output high-impedance
10
—
50
ns
SP78* TSCR
SCK output rise time
(Master mode)
—
10
25
ns
3.0V  VDD  5.5V
—
25
50
ns
1.8V  VDD  5.5V
SP79* TSCF
SCK output fall time (Master mode)
—
10
25
ns
SP80* TSCH2DOV,
TSCL2DOV
SDO data output valid after SCK
edge
—
—
50
ns
3.0V  VDD  5.5V
1.8V  VDD  5.5V
SP81* TDOV2SCH, SDO data output setup to SCK edge
TDOV2SCL
SP82* TSSL2DOV
SDO data output valid after SS
edge
SP83* TSCH2SSH,
TSCL2SSH
SS after SCK edge
—
—
145
ns
1 Tcy
—
—
ns
—
—
50
ns
1.5 TCY + 40
—
—
ns
* These parameters are characterized but not tested.
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
DS40001722C-page 290
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
FIGURE 26-18:
I2C BUS START/STOP BITS TIMING
SCL
SP93
SP91
SP90
SP92
SDA
Stop
Condition
Start
Condition
Note: Refer to Figure 26-4 for load conditions.
TABLE 26-19: I2C BUS START/STOP BITS REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Symbol
Characteristic
SP90*
TSU:STA
Start condition
SP91*
THD:STA
SP92*
TSU:STO
SP93*
THD:STO Stop condition
Typ
4700
—
Max. Units
—
Setup time
400 kHz mode
600
—
—
Start condition
100 kHz mode
4000
—
—
Hold time
400 kHz mode
600
—
—
Stop condition
100 kHz mode
4700
—
—
Setup time
Hold time
*
100 kHz mode
Min.
400 kHz mode
600
—
—
100 kHz mode
4000
—
—
400 kHz mode
600
—
—
Conditions
ns
Only relevant for Repeated
Start condition
ns
After this period, the first
clock pulse is generated
ns
ns
These parameters are characterized but not tested.
FIGURE 26-19:
I2C BUS DATA TIMING
SP103
SCL
SP100
SP90
SP102
SP101
SP106
SP107
SP91
SDA
In
SP92
SP110
SP109
SP109
SDA
Out
Note: Refer to Figure 26-4 for load conditions.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 291
PIC16(L)F1703/7
TABLE 26-20: I2C BUS DATA REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Param.
No.
Symbol
SP100* THIGH
Characteristic
Clock high time
Min.
Max.
Units
100 kHz mode
4.0
—
s
Device must operate at a
minimum of 1.5 MHz
400 kHz mode
0.6
—
s
Device must operate at a
minimum of 10 MHz
1.5TCY
—
100 kHz mode
4.7
—
s
Device must operate at a
minimum of 1.5 MHz
400 kHz mode
1.3
—
s
Device must operate at a
minimum of 10 MHz
1.5TCY
—
SSP module
SP101*
TLOW
Clock low time
SSP module
SP102* TR
SP103* TF
SDA and SCL rise
time
100 kHz mode
—
1000
ns
400 kHz mode
20 + 0.1CB
300
ns
SDA and SCL fall
time
100 kHz mode
—
250
ns
400 kHz mode
20 + 0.1CB
250
ns
0
—
ns
SP106* THD:DAT
Data input hold time 100 kHz mode
400 kHz mode
0
0.9
s
SP107* TSU:DAT
Data input setup
time
100 kHz mode
250
—
ns
400 kHz mode
100
—
ns
SP109* TAA
Output valid from
clock
100 kHz mode
—
3500
ns
400 kHz mode
—
—
ns
SP110*
Bus free time
100 kHz mode
4.7
—
s
400 kHz mode
1.3
—
s
—
400
pF
SP111*
*
Note 1:
2:
TBUF
CB
Conditions
Bus capacitive loading
CB is specified to be from
10-400 pF
CB is specified to be from
10-400 pF
(Note 2)
(Note 1)
Time the bus must be free
before a new transmission
can start
These parameters are characterized but not tested.
As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region
(min. 300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions.
A Fast mode (400 kHz) I2C bus device can be used in a Standard mode (100 kHz) I2C bus system, but the
requirement TSU:DAT 250 ns must then be met. This will automatically be the case if the device does not
stretch the low period of the SCL signal. If such a device does stretch the low period of the SCL signal, it
must output the next data bit to the SDA line TR max. + TSU:DAT = 1000 + 250 = 1250 ns (according to the
Standard mode I2C bus specification), before the SCL line is released.
DS40001722C-page 292
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
27.0
DC AND AC
CHARACTERISTICS GRAPHS
AND CHARTS
The graphs and tables provided in this section are for design guidance and are not tested.
In some graphs or tables, the data presented are outside specified operating range (i.e., outside specified VDD
range). This is for information only and devices are ensured to operate properly only within the specified range.
Unless otherwise noted, all graphs apply to both the L and LF devices.
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore, outside the warranted range.
“Typical” represents the mean of the distribution at 25C. “MAXIMUM”, “Max.”, “MINIMUM” or “Min.”
represents (mean + 3) or (mean - 3) respectively, where  is a standard deviation, over each
temperature range.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 293
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
,
,
,
12
60
Max.
Max: 85°C + 3ı
Typical: 25°C
10
Max.
Max: 85°C + 3ı
Typical: 25°C
50
Typical
40
IDD (μA)
IDD (μA)
8
Typical
6
30
4
20
2
10
0
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
2.0
3.8
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
VDD (V)
FIGURE 27-1:
IDD, EC Oscillator,
Low-Power Mode, FOSC = 32 kHz,
PIC16LF1703/7 Only.
FIGURE 27-4:
IDD, EC Oscillator,
Low-Power Mode, FOSC = 500 kHz,
PIC16F1703/7 Only.
350
25
Max.
300
Max: 85°C + 3ı
Typical: 25°C
20
Typical: 25°C
4 MHz
Typical
15
IDD (μA)
IDD (μA)
250
200
150
10
100
1 MHz
5
50
0
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.6
6.0
1.8
2.0
2.2
2.4
2.6
FIGURE 27-2:
IDD, EC Oscillator,
Low-Power Mode, FOSC = 32 kHz,
PIC16F1703/7 Only.
,
,
3.0
3.2
3.4
3.6
3.8
FIGURE 27-5:
IDD Typical, EC Oscillator,
Medium-Power Mode, PIC16LF1703/7 Only.
,
,
,
350
50
Max.
45
4 MHz
Max: 85°C + 3ı
300
Max: 85°C + 3ı
Typical: 25°C
40
250
30
IDD (μA)
35
IDD (μA)
2.8
VDD (V)
VDD (V)
Typical
25
200
150
20
15
1 MHz
100
10
50
5
0
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
VDD (V)
FIGURE 27-3:
IDD, EC Oscillator,
Low-Power Mode, FOSC = 500 kHz,
PIC16LF1703/7 Only.
DS40001722C-page 294
3.6
3.8
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
FIGURE 27-6:
IDD Maximum, EC Oscillator,
Medium-Power Mode, PIC16LF1703/7 Only.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
3.0
400
350
Max: 85°C + 3ı
Typical: 25°C
2.5
4 MHz
32 MHz
300
IDD (mA)
IDD (μA)
2.0
250
200
1 MHz
1.5
16 MHz
150
1.0
100
8 MHz
0.5
50
0
0.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
1.6
1.8
2.0
2.2
2.4
2.6
FIGURE 27-7:
IDD Typical, EC Oscillator,
Medium-Power Mode, PIC16F1703/7 Only.
,
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
VDD (V)
FIGURE 27-10:
IDD Maximum, EC Oscillator,
High-Power Mode, PIC16LF1703/7 Only.
,
2.5
450
32 MHz
400
Typical: 25°C
Max: 85°C + 3ı
2.0
350
4 MHz
1.5
IDD (mA)
IDD (μA)
300
250
200
1 MHz
16 MHz
1.0
8 MHz
150
100
0.5
50
0.0
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.0
6.0
2.5
3.0
3.5
FIGURE 27-8:
IDD Maximum, EC Oscillator,
Medium-Power Mode, PIC16F1703/7 Only.
4.5
5.0
5.5
6.0
FIGURE 27-11:
IDD Typical, EC Oscillator,
High-Power Mode, PIC16F1703/7 Only.
2.5
2.5
Max: 85°C + 3ı
32 MHz
Typical: 25°C
2.0
2.0
1.5
1.5
IDD (mA)
IDD (mA)
4.0
VDD (V)
VDD (V)
16 MHz
32 MHz
16 MHz
1.0
1.0
8 MHz
8 MHz
0.5
0.5
0.0
0.0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
FIGURE 27-9:
IDD Typical, EC Oscillator,
High-Power Mode, PIC16LF1703/7 Only.
 2013-2015 Microchip Technology Inc.
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
FIGURE 27-12:
IDD Maximum, EC Oscillator,
High-Power Mode, PIC16F1703/7 Only.
DS40001722C-page 295
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
7
260
Max.
Max: 85°C + 3ı
Typical: 25°C
240
Max: 85°C + 3ı
Typical: 25°C
6
5
Max.
220
Typical
IDD (μA)
IDD (μA)
Typical
200
4
180
3
160
2
140
1
120
100
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
2.0
3.8
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
VDD (V)
FIGURE 27-16:
IDD, MFINTOSC Mode,
Fosc = 500 kHz, PIC16F1703/7 Only.
FIGURE 27-13:
IDD, LFINTOSC Mode,
Fosc = 31 kHz, PIC16LF1703/7 Only.
25
1.6
16 MHz
Max.
1.4
Typical: 25°C
20
1.2
15
IDD (mA)
IDD (μA)
Typical
10
1.0
8 MHz
0.8
4 MHz
0.6
2 MHz
0.4
5
1 MHz
Max: 85°C + 3ı
Typical: 25°C
0.2
0.0
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.6
6.0
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
VDD (V)
FIGURE 27-14:
IDD, LFINTOSC Mode,
Fosc = 31 kHz, PIC16F1703/7 Only.
FIGURE 27-17:
IDD Typical, HFINTOSC
Mode, PIC16LF1703/7 Only.
180
1.8
1.6
170
Max: 85°C + 3ı
Typical: 25°C
160
Max.
16 MHz
Max: 85°C + 3ı
1.4
1.2
140
IDD (mA)
IDD (μA)
150
Typical
8 MHz
1.0
0.8
4 MHz
130
2 MHz
0.6
120
0.4
110
1 MHz
0.2
0.0
100
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
VDD (V)
FIGURE 27-15:
IDD, MFINTOSC Mode,
Fosc = 500 kHz, PIC16LF1703/7 Only.
DS40001722C-page 296
3.8
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
FIGURE 27-18:
IDD Maximum, HFINTOSC
Mode, PIC16LF1703/7 Only.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
p
1.6
,
(
)
1.2
16 MHz
1.4
Ma
Max.
Typical: 25°C
1
1.2
0.8
8 MHz
IPD (μA
(μA)
IDD (mA)
1.0
0.8
4 MHz
0.6
2 MHz
0.4
1 MHz
Max: 85°C + 3ı
Typical: 25°C
0.6
0.4
Typical
0.2
0.2
0
0.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.0
6.0
2.5
3.0
3.5
4.0
5.0
5.5
6.0
FIGURE 27-22:
IPD Base, Low-Power Sleep
Mode (VREGPM = 1), PIC16F1703/7 Only.
FIGURE 27-19:
IDD Typical, HFINTOSC
Mode, PIC16F1703/7 Only.
1.6
3
16 MHz
1.4
4.5
VDD (V)
VDD (V)
Max: 85°C + 3ı
Typical: 25°C
Max: 85°C + 3ı
2.5
1.2
IPD (μA)
IDD (mA)
0.8
Max.
2
8 MHz
1.0
4 MHz
1.5
2 MHz
0.6
1
1 MHz
0.4
Typical
0.5
0.2
0
0.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.6
6.0
1.8
2.0
2.2
2.4
2.6
3.0
3.2
3.4
3.6
3.8
VDD (V)
VDD (V)
FIGURE 27-20:
IDD Maximum, HFINTOSC
Mode, PIC16F1703/7 Only.
p
2.8
FIGURE 27-23:
IPD, Watchdog Timer (WDT),
PIC16LF1703/7 only.
p
,
450
(
)
2.5
400
Max: 85°C + 3ı
Typical: 25°C
Max.
2
350
Max.
IPD (μA)
IDD (nA
(nA)
300
250
Max: 85°C + 3ı
Typical: 25°C
200
1.5
1
150
Typical
100
0.5
Typical
50
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
FIGURE 27-21:
IPD Base, Low-Power Sleep
Mode, PIC16LF1703/7 Only.
 2013-2015 Microchip Technology Inc.
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
FIGURE 27-24:
IPD, Watchdog Timer (WDT),
PIC16F1703/7 only.
DS40001722C-page 297
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
p ,
(
p
)
(
)
13
35
Max: 85°C + 3ı
Typical: 25°C
Max: 85°C + 3ı
Typical: 25°C
12
30
Max.
11
Max.
10
IDD
D (nA)
IDD (nA)
25
20
Typical
9
Typical
8
7
15
6
10
5
4
5
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
2.8
3.8
3.0
3.2
3.4
3.6
3.8
4.0
(
4.4
4.6
4.8
5.0
5.2
5.4
5.6
FIGURE 27-28:
IPD, Brown-Out Reset
(BOR), BORV = 1, PIC16F1703/7 only.
FIGURE 27-25:
IPD, Fixed Voltage
Reference (FVR), PIC16LF1703/7 only.
p ,
4.2
VDD (V)
VDD (V)
)
p ,
(
)
1.8
35
Max.
Max.
1.6
30
1.4
25
1.2
IDD (nA
(nA)
IDD (nA
(nA)
Typical
20
15
Max: 85°C + 3ı
Typical: 25
C
25°C
1
0.8
0.6
10
Typical
0.4
Max: 85°C + 3ı
Typical: 25°C
5
0.2
0
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.9
6.0
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
VDD (V)
VDD (V)
FIGURE 27-26:
IPD, Fixed Voltage
Reference (FVR), PIC16F1703/7 only.
FIGURE 27-29:
IPD, Low-Power Brown-Out
Reset (BOR), LPBOR = 0, PIC16LF1703/7 only.
1.8
11
Max: 85°C + 3ı
Typical: 25°C
10
Max.
Max: 85°C + 3ı
T i l 25°C
Typical:
16
1.6
Max.
1.4
9
IDD (μA
(μA)
IDD ((nA)
1.2
Typical
8
7
1.0
08
0.8
0.6
6
Typical
0.4
5
0.2
0.0
4
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
VDD (V)
FIGURE 27-27:
IPD, Brown-Out Reset
(BOR), BORV = 1, PIC16LF1703/7 only.
DS40001722C-page 298
3.7
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
5.2
5.4
5.6
VDD (V)
FIGURE 27-30:
IPD, Low-Power Brown-Out
Reset (BOR), LPBOR = 0, PIC16F1703/7 only.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
p
p ,
7
,
(
)
900
Max: 85°C + 3ı
Typical: 25°C
6
Max: 85°C + 3ı
Typical: 25°C
800
Max.
Max.
700
5
IDD (μA)
IDD (μA
(μA)
600
4
3
Typical
500
Typical
400
300
2
200
1
100
0
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
1.5
3.8
2.0
2.5
3.0
3.5
4.5
5.0
5.5
6.0
FIGURE 27-34:
IPD, Op Amp, High GBWP
Mode (OPAxSP = 1), PIC16F1703/7 Only.
FIGURE 27-31:
IPD, Timer1 Oscillator,
Fosc = 32 kHz, PIC16LF1703/7 Only.
p ,
4.0
VDD (V)
VDD (V)
,
p ,
12
g
500
Max: 85°C + 3ı
Typical: 25°C
Max: 85°C + 3ı
Typical: 25°C
450
10
Max.
400
Max.
350
IDD (μA)
IDD (μA)
8
6
Typical
300
250
200
4
150
100
2
Typical
50
0
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.6
6.0
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
VDD (V)
FIGURE 27-32:
IPD, Timer1 Oscillator,
Fosc = 32 kHz, PIC16F1703/7 Only.
FIGURE 27-35:
IPD, ADC Non-Converting,
PIC16LF1703/7 only
700
1.4
Max: 85°C + 3ı
Typical: 25°C
600
Max: 85°C + 3ı
Typical: 25°C
1.2
Max.
Max.
500
400
IDD (μA)
IDD (μA)
1
Typical
300
0.8
0.6
200
0.4
100
0.2
Typical
0
0
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
VDD (V)
FIGURE 27-33:
IPD, Op Amp, High GBWP
Mode (OPAxSP = 1), PIC16LF1703/7 Only.
 2013-2015 Microchip Technology Inc.
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
FIGURE 27-36:
IPD, ADC Non-Converting,
PIC16F1703/7 only
DS40001722C-page 299
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
,
6
3.0
Graph represents 3ı Limits
Graph represents 3ı Limits
5
2.5
2.0
VOL (V)
VOH (V)
4
-40°C
3
-40°C
Typical
1.5
125°C
125°C
2
1.0
Typical
1
0.5
0
0.0
-30
-25
-20
-15
-10
-5
0
0
5
10
15
IOH (mA)
FIGURE 27-37:
VOH vs. IOH Over
Temperature, VDD = 5.0V, PIC16F1703/7 Only.
e
Vol vs. Iol OVER TEMPERATURE, Vdd
20
25
30
IOL (mA)
FIGURE 27-40:
VOL vs. IOL Over
Temperature, VDD = 3.0V.
5.0V
2.0
5
Graph represents 3ı Limits
Graph represents 3ı Limits
1.8
1.6
4
1.4
VOH (V)
VOL (V)
3
-40°C
2
1.2
125°C
1.0
0.8
Typical
Typical
-40°C
0.6
125°C
0.4
1
0.2
0.0
-4.0
0
0
10
20
30
40
IOL (mA)
50
60
70
80
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
IOH (mA)
FIGURE 27-38:
VOL vs. IOL Over
Temperature, VDD = 5.0V, PIC16F1703/7 Only.
FIGURE 27-41:
VOH vs. IOH Over
Temperature, VDD = 1.8V, PIC16LF1703/7 Only.
,
3.5
1.8
Graph represents 3ı Limits
1.6
Graph represents 3ı Limits
3.0
1.4
2.5
Vol (V)
VOH (V)
1.2
2.0
1.5
1.0
125°C
Typical
0.8
125°C
-40°C
0.6
Typical
1.0
0.4
-40°C
0.5
0.2
0.0
0.0
-14
-12
-10
-8
-6
-4
IOH (mA)
FIGURE 27-39:
VOH vs. IOH Over
Temperature, VDD = 3.0V.
DS40001722C-page 300
-2
0
0
1
2
3
4
5
6
7
8
9
10
IOL (mA)
FIGURE 27-42:
VOL vs. IOL Over
Temperature, VDD = 1.8V, PIC16F1703/7 Only.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
q
y
24
40,000
38,000
22
Max.
Max.
36,000
20
34,000
Time (mS)
Frequency (Hz)
Typical
32,000
30,000
Min.
18
Typical
16
28,000
26,000
14
24,000
Min.
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
22,000
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
12
10
20,000
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
1.6
3.8
1.8
2
2.2
2.4
VDD (V)
2.8
3
3.2
3.4
3.6
3.8
FIGURE 27-46:
WDT Time-Out Period,
PIC16LF1703/7 Only.
FIGURE 27-43:
LFINTOSC Frequency,
PIC16LF1703/7 Only.
q
2.6
VDD (V)
,
y
40,000
(
)
2.00
38,000
Max.
Max.
36,000
1.95
Typical
Typical
32,000
Voltage (V)
Frequency (Hz)
34,000
30,000
Min.
28,000
1.90
Min.
26,000
1.85
24,000
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
22,000
20,000
1.80
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
-60
-40
-20
0
20
VDD (V)
40
60
80
24
70
22
60
140
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
Max.
Max.
50
Voltage (mV)
20
Time (mS)
120
FIGURE 27-47:
Brown-Out Reset Voltage,
Low Trip Point (BORV = 1), PIC16LF1703/7 only.
FIGURE 27-44:
LFINTOSC Frequency,
PIC16F1703/7 Only.
18
100
Temperature (°C)
Typical
16
Min.
40
30
Typical
20
14
Min.
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
12
10
0
10
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VDD (V)
FIGURE 27-45:
WDT Time-Out Period,
PIC16F1703/7 Only.
 2013-2015 Microchip Technology Inc.
6.0
-60
-40
-20
0
20
40
60
80
100
120
140
Temperature (°C)
FIGURE 27-48:
Brown-Out Reset
Hysteresis, Low Trip Point (BORV = 1),
PIC16LF1703/7 only.
DS40001722C-page 301
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
,
2.60
(
)
80
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
70
2.55
Max.
Max.
60
Typical
Voltage (mV)
Voltage (V)
2.50
Min.
2.45
2.40
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
2.35
50
Typical
40
30
20
Min.
10
2.30
-60
-40
-20
0
20
40
60
80
100
120
0
140
-60
-40
-20
0
20
40
60
FIGURE 27-49:
Brown-Out Reset Voltage,
Low Trip Point (BORV = 1), PIC16F1703/7 only.
100
120
140
FIGURE 27-52:
Brown-Out Reset
Hysteresis, High Trip Point (BORV = 0).
70
2.6
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
Max.
60
Max.
2.5
2.4
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
50
Voltage (V)
2.3
Voltage (mV)
80
Temperature (°C)
Temperature (°C)
40
Typical
30
2.2
Typical
2.1
2.0
20
1.9
Min.
Min.
10
1.8
0
1.7
-60
-40
-20
0
20
40
60
80
100
120
140
-60
-40
-20
0
FIGURE 27-53:
FIGURE 27-50:
Brown-Out Reset
Hysteresis, Low Trip Point (BORV = 1),
PIC16F1703/7 only.
2.85
40
60
80
100
120
140
LPBOR Reset Voltage.
50
Max.
40
Max.
35
Voltage (mV)
2.75
Typical
Min.
2.70
Max: Typical + 3ı
Typical: statistical mean
45
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
2.80
Voltage (V)
20
Temperature (°C)
Temperature (°C)
30
25
20
Typical
15
2.65
10
5
2.60
0
-60
-40
-20
0
20
40
60
80
100
120
140
-60
-40
-20
FIGURE 27-51:
Brown-Out Reset Voltage,
High Trip Point (BORV = 0).
DS40001722C-page 302
0
20
40
60
80
100
120
140
Temperature (°C)
Temperature (°C)
FIGURE 27-54:
LPBOR Reset Hysteresis.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
1.58
1.58
100
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
90
Max: Typical + 3ı
Typical: 25°C
Max. Min: Typical - 3ı
1.561.56
Max.
1.541.54
Voltage (V)
Typical
70
Typical
Voltage (V)
Time (mS)
80
1.521.52
1.51.50
Min.
Min.
60
1.481.48
50
Max: Typical + 3ı
Typical: statistical mean
Min:-20
Typical - 3ı0
1.46
1.46
-40
20
40
60
80
100
120
Temperature (°C)
1.44
40
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-50
6.0
-25
0
25
50
75
100
125
Temperature (°C)
VDD (V)
FIGURE 27-55:
PWRT Period,
PIC16F1703/7 Only.
FIGURE 27-58:
POR REARM Voltage,
Normal-Power Mode (VREGPM1 = 0),
PIC16F1703/7 Only.
,
110
1.4
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
100
1.3
Max.
1.2
90
Voltage (V)
Time (mS)
Max.
80
Typical
70
1.1
Typical
1.0
0.9
Min.
60
Min.
0.8
50
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
0.7
40
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
0.6
3.8
-50
-25
0
25
50
75
100
125
Temperature (°C)
VDD (V)
FIGURE 27-59:
POR REARM Voltage,
Normal-Power Mode, PIC16LF1703/7 Only.
FIGURE 27-56:
PWRT Period,
PIC16LF1703/7 Only.
12
1.70
1.68
Max.
10
Typical
8
Voltage (V)
1.64
Time (μs)
1.66
1.62
1.60
Min.
Max.
6
Typical
1.58
4
1.56
Max: Typical + 3ı
Typical: statistical mean
Min: Typical - 3ı
1.54
1.52
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
2
0
1.50
-50
-25
0
25
50
75
100
125
1.5
2.0
2.5
Temperature (°C)
FIGURE 27-57:
POR Release Voltage.
 2013-2015 Microchip Technology Inc.
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
FIGURE 27-60:
VREGPM = 0.
Wake From Sleep,
DS40001722C-page 303
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
1.0
50
45
40
0.5
Max.
DNL(LSb)
Time (μs)
35
30
Typical
25
0.0
20
15
Ͳ0.5
10
Max: Typical + 3ı (-40°C to +125°C)
Typical; statistical mean @ 25°C
Min: Typical - 3ı (-40°C to +125°C)
5
Ͳ1.0
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
6.0
128
256
384
FIGURE 27-61:
VREGPM = 1.
512
640
768
896
1024
OutputCode
VDD (V)
Wake From Sleep,
FIGURE 27-64:
ADC 10-bit Mode,
Single-ended DNL, VDD = 3.0V, TAD = 4 µS,
25°C.
1.0
40
Max: Typical + 3ı
Typical: statistical mean @ 25°C
35
0.5
Max.
INL(LSb)
Time (μs)
30
Typical
25
0.0
20
Ͳ0.5
Note:
The FVR Stabiliztion Period applies when coming out of Reset
or exiting Sleep mode.
15
Ͳ1.0
10
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
0
3.8
128
256
384
512
640
768
896
1024
OutputCode
VDD (mV)
FIGURE 27-65:
ADC 10-bit Mode,
Single-ended INL, VDD = 3.0V, TAD = 1 µS, 25°C.
FIGURE 27-62:
FVR Period,
PIC16LF1703/7 Only.
2.0
1.0
1.0
1.5
1.0
INL(LSb)
DNL(LSb)
DNL(LSb)
0.5
0.0
0.5
0.5
0.0
Ͳ0.5
0.0
Ͳ1.0
Ͳ1.5
Ͳ0.5
Ͳ0.5
Ͳ2.0
0
512
1024
1536
2048
2560
3072
3584
4096
640
768
896
1024
OutputCode
Ͳ1.0
0
128
256
384
512
640
768
896
OutputCode
FIGURE 27-63:
ADC 10-bit Mode,
Single-ended DNL, VDD = 3.0V, TAD = 1 µS,
25°C.
DS40001722C-page 304
1024
Ͳ1.0
0
128
256
384
512
OutputCode
FIGURE 27-66:
ADC 10-bit Mode,
Single-ended INL, VDD = 3.0V, TAD = 4 µS, 25°C.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
1.5
1.5
1.0
MinͲ40°C
MaxͲ40°C
1.0
Min25°C
Max25°C
DNL(LSb)
Min125°C
0.0
Min125°C
INL(LSb)
0.5
0.5
Max125°C
0.0
Min25°C
Ͳ0.5
Min125°C
MinͲ40°C
MinͲ40°C
Ͳ0.5
Ͳ1.0
Ͳ1.5
5.00EͲ07
1.00EͲ06
2.00EͲ06
4.00EͲ06
Min25°C
Ͳ1.0
8.00EͲ06
1.8
2.3
TADs
FIGURE 27-67:
ADC 10-bit Mode,
Single-ended DNL, VDD = 3.0V, VREF = 3.0V.
FIGURE 27-70:
ADC 10-bit Mode,
Single-ended INL, VDD = 3.0V, TAD = 1 µS.
1.5
800
MaxͲ40°C
INL(LSb)
0.5
700
Max
600
Max125°C
Typical
0.0
Ͳ0.5
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
Max25°C
Min25°C
Min125°C
MinͲ40°C
ADC Output Codes
1.0
3
VREF
500
Min
400
300
200
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
Ͳ1.0
100
Ͳ1.5
0
5.00EͲ07
1.00EͲ06
2.00EͲ06
4.00EͲ06
8.00EͲ06
2.5
3.0
3.5
4.0
TADs
4.5
5.0
5.5
6.0
VDD (V)
FIGURE 27-68:
ADC 10-bit Mode,
Single-ended INL, VDD = 3.0V, VREF = 3.0V.
FIGURE 27-71:
Temperature Indicator Initial
Offset, High Range, Temp. = 20°C,
PIC16F1703/7 only.
1.5
900
1.0
800
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
Max
Typical
MaxͲ40°C
Max25°C
Max125°C
0.0
Min125°C
Ͳ0.5
Min25°C
MinͲ40°C
Ͳ1.0
700
ADC Output Codes
DNL(LSb)
0.5
Min
600
500
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
400
300
Ͳ1.5
1.8
2.3
3
VREF
FIGURE 27-69:
ADC 10-bit Mode,
Single-ended DNL, VDD = 3.0V, TAD = 1 µS.
 2013-2015 Microchip Technology Inc.
2.0
2.4
2.8
3.2
3.6
4.0
4.4
4.8
5.2
5.6
VDD (V)
FIGURE 27-72:
Temperature Indicator Initial
Offset, Low Range, Temp. = 20°C,
PIC16F1703/7 only.
DS40001722C-page 305
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
800
150
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
Max
700
Typical
Typical
Min
600
Min
ADC Output Codes
ADC Output Codes
Max
100
500
400
300
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
200
50
0
-50
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
100
-100
1.6
2.0
2.4
2.8
3.2
3.6
4.0
-60
-40
-20
0
20
VDD (V)
FIGURE 27-73:
Temperature Indicator Initial
Offset, Low Range, Temp. = 20°C,
PIC16LF1703/7 only.
80
100
120
140
160
250
Max
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
125
Max
Typical
Min
150
ADC Output Codes
75
50
25
0
-25
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
-50
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
200
Typical
100
ADC Output Codes
60
FIGURE 27-76:
Temperature Indicator Slope
Normalized to 20°C, Low Range, VDD = 3.0,
PIC16F1703/7 only.
150
Min
100
50
0
-50
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
-100
-150
-75
-60
-40
-20
0
20
40
60
80
100
120
140
-60
160
-40
-20
0
20
40
60
80
100
120
140
160
Temperature (°C)
Temperature (°C)
FIGURE 27-74:
Temperature Indicator Slope
Normalized to 20°C, High Range, VDD = 5.0,
PIC16F1703/7 only.
FIGURE 27-77:
Temperature Indicator Slope
Normalized to 20°C, Low Range, VDD = 1.8,
PIC16LF1703/7 only.
250
150
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
200
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
Max
Typical
150
Max
Typical
Min
100
Min
100
ADC Output Codes
ADC Output Codes
40
Temperature (°C)
50
0
-50
50
0
-50
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
-100
-150
-100
-60
-40
-20
0
20
40
60
80
100
120
140
160
Temperature (°C)
FIGURE 27-75:
Temperature Indicator Slope
Normalized to 20°C, High Range, VDD = 3.0,
PIC16F1703/7 only.
DS40001722C-page 306
-60
-40
-20
0
20
40
60
80
100
120
140
160
Temperature (°C)
FIGURE 27-78:
Temperature Indicator Slope
Normalized to 20°C, Low Range, VDD = 3.0,
PIC16LF1703/7 only.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
g
250
8
Max
ADC VREF+ SET TO VDD
ADC VREF- SET TO GND
200
Typical
6
Min
4
ADC Output Codes
100
50
0
Max
Typical
Offset Voltage (V)
150
2
0
Min
-2
-50
-4
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
-100
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
-6
-150
-8
-60
-40
-20
0
20
40
60
80
100
120
140
160
0.0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
3.0
Common Mode Voltage (V)
Temperature (°C)
FIGURE 27-79:
Temperature Indicator Slope
Normalized to 20°C, High Range, VDD = 3.0,
PIC16LF1703/7 only.
FIGURE 27-82:
Op Amp, Offset Over
Common-Mode Voltage, VDD = 3.0V,
Temp. = 25°C
8
80
Max
Max
6
75
4
70
Typical
Offset Voltage (V)
CMRR (dB)
p
65
60
Min
55
Typical
2
0
-2
-4
50
Min
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
45
Max: Typical + 3ı
Typical; statistical mean
Min: Typical - 3ı
-6
-8
40
-50
-30
-10
10
30
50
70
90
110
0.0
130
0.5
1.0
1.5
FIGURE 27-80:
Op Amp, Common-Mode
Rejection Ratio (CMRR), VDD = 3.0V
,
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Common Mode Voltage (V)
Temperature (°C)
,
FIGURE 27-83:
Op Amp, Offset Over
Common-Mode Voltage, VDD = 5.0V,
Temp. = 25°C, PIC16F1703/7 only.
,
,
,
35%
7.75
Sample Size = 3,200
7.70
30%
VDD = 3V
7.65
7.60
Slew Rate (V/μs)
Percent of Units
25%
20%
-40°C
15%
25°C
10%
7.55
VDD = 3.6V
7.50
7.45
85°C
7.40
125°C
7.35
7.30
5%
VDD = 2.3V
7.25
7.20
0%
-7
-5
-4
-3
-2
-1
0
1
2
Offset Voltage (mV)
3
4
5
6
FIGURE 27-81:
Op Amp, Offset Voltage
Histogram, VDD = 3.0V, VCM = VDD/2
 2013-2015 Microchip Technology Inc.
7
-60
-40
-20
0
20
40
60
80
100
120
140
VDD (V)
FIGURE 27-84:
Op Amp, Output Slew Rate,
Rising Edge, PIC16LF1703/7 only.
DS40001722C-page 307
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
g ,
4.0
0.85
0.80
VDD = 3.6V
-40°C
VDD= 3V
3.4
VDD = 2.3V
ZCD Pin Voltage (V)
Slew Rate (V/μs)
3.7
0.75
25°C
0.70
85°C
3.1
0.65
2.8
125°
0.60
-60
-40
-20
0
20
40
60
80
100
120
140
2.0
2.5
3.0
3.5
VDD (V)
4.0
4.5
5.0
5.5
6.0
VDD (V)
FIGURE 27-85:
Op Amp, Output Slew Rate,
Falling Edge, PIC16LF1703/7 only.
FIGURE 27-88:
Zero-Cross Detection (ZCD)
Pin Voltage, Typical Measured Values.
1.4
8.0
Fall-2.3V
1.2
7.8
Fall-3.0V
VDD = 3V
Fall-5.5V
7.6
7.4
VDD = 3.6V
7.2
Time (us)
Slew Rate (V/μs)
1.0
VDD = 2.3V
0.8
0.6
0.4
Rise-2.3V
Rise-3.0V
7.0
0.2
Rise-5.5V
VDD = 5V
6.8
0.0
-60
-40
-20
0
20
40
60
80
100
120
140
-40
-20
0
20
VDD (V)
40
60
80
100
120
140
160
Temperature (°C)
FIGURE 27-86:
Op Amp, Output Slew Rate,
Rising Edge, PIC16F1703/7 only.
FIGURE 27-89:
Zero-Cross Detection (ZCD)
Time Over Voltage, Typical Measured Values.
8
4.4
VDD = 5V
Slew Rate (V/μs)
4.0
3.8
VDD = 3.6V
3.6
VDD = 3V
3.4
3.2
ZCD Source/Sink Current (mA)
5.5V
4.2
3.0V
6
2.3V
4
2
1.8V
0
VDD = 2.3V
-2
3.0
-4
2.8
-60
-40
-20
0
20
40
60
80
100
120
140
VDD (V)
FIGURE 27-87:
Op Amp, Output Slew Rate,
Falling Edge, PIC16F1703/7 only.
DS40001722C-page 308
0.0
0.5
1.0
1.5
2.0
ZCD Pin Voltage (V)
FIGURE 27-90:
Zero-Cross Detection (ZCD)
Pin Current Over ZCD Pin Voltage, Typical
Measured Values from -40°C to 125°C.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note: Unless otherwise noted, VIN = 5V, FOSC = 500 kHz, CIN = 0.1 µF, TA = 25°C.
1.0
0.9
0.8
Time (us)
0.7
0.6
0.5
0.4
1.8V
0.3
2.3V
3.0V
0.2
5.5V
0.1
0
50
100
150
200
250
300
350
400
450
500
ZCD Source/Sink Current (uA)
FIGURE 27-91:
Zero-Cross Detection (ZCD)
Pin Response Time Over Current, Typical
Measured Values from -40°C to 125°C.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 309
PIC16(L)F1703/7
28.0
DEVELOPMENT SUPPORT
The PIC® microcontrollers (MCU) and dsPIC® digital
signal controllers (DSC) are supported with a full range
of software and hardware development tools:
• Integrated Development Environment
- MPLAB® X IDE Software
• Compilers/Assemblers/Linkers
- MPLAB XC Compiler
- MPASMTM Assembler
- MPLINKTM Object Linker/
MPLIBTM Object Librarian
- MPLAB Assembler/Linker/Librarian for
Various Device Families
• Simulators
- MPLAB X SIM Software Simulator
• Emulators
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debuggers/Programmers
- MPLAB ICD 3
- PICkit™ 3
• Device Programmers
- MPLAB PM3 Device Programmer
• Low-Cost Demonstration/Development Boards,
Evaluation Kits and Starter Kits
• Third-party development tools
28.1
MPLAB X Integrated Development
Environment Software
The MPLAB X IDE is a single, unified graphical user
interface for Microchip and third-party software, and
hardware development tool that runs on Windows®,
Linux and Mac OS® X. Based on the NetBeans IDE,
MPLAB X IDE is an entirely new IDE with a host of free
software components and plug-ins for highperformance application development and debugging.
Moving between tools and upgrading from software
simulators to hardware debugging and programming
tools is simple with the seamless user interface.
With complete project management, visual call graphs,
a configurable watch window and a feature-rich editor
that includes code completion and context menus,
MPLAB X IDE is flexible and friendly enough for new
users. With the ability to support multiple tools on
multiple projects with simultaneous debugging, MPLAB
X IDE is also suitable for the needs of experienced
users.
Feature-Rich Editor:
• Color syntax highlighting
• Smart code completion makes suggestions and
provides hints as you type
• Automatic code formatting based on user-defined
rules
• Live parsing
User-Friendly, Customizable Interface:
• Fully customizable interface: toolbars, toolbar
buttons, windows, window placement, etc.
• Call graph window
Project-Based Workspaces:
•
•
•
•
Multiple projects
Multiple tools
Multiple configurations
Simultaneous debugging sessions
File History and Bug Tracking:
• Local file history feature
• Built-in support for Bugzilla issue tracker
DS40001722C-page 310
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
28.2
MPLAB XC Compilers
The MPLAB XC Compilers are complete ANSI C
compilers for all of Microchip’s 8, 16, and 32-bit MCU
and DSC devices. These compilers provide powerful
integration capabilities, superior code optimization and
ease of use. MPLAB XC Compilers run on Windows,
Linux or MAC OS X.
For easy source level debugging, the compilers provide
debug information that is optimized to the MPLAB X
IDE.
The free MPLAB XC Compiler editions support all
devices and commands, with no time or memory
restrictions, and offer sufficient code optimization for
most applications.
MPLAB XC Compilers include an assembler, linker and
utilities. 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. MPLAB XC Compiler uses the assembler to
produce its object file. Notable features of the assembler include:
•
•
•
•
•
•
Support for the entire device instruction set
Support for fixed-point and floating-point data
Command-line interface
Rich directive set
Flexible macro language
MPLAB X IDE compatibility
28.3
MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for PIC10/12/16/18 MCUs.
The MPASM Assembler generates relocatable object
files for the MPLINK Object Linker, Intel® standard HEX
files, MAP files to detail memory usage and symbol
reference, absolute LST files that contain source lines
and generated machine code, and COFF files for
debugging.
The MPASM Assembler features include:
28.4
MPLINK Object Linker/
MPLIB Object Librarian
The MPLINK Object Linker combines relocatable
objects created by the MPASM Assembler. It can link
relocatable objects from precompiled libraries, using
directives from a linker script.
The MPLIB Object Librarian manages the creation and
modification of library files of precompiled code. When
a routine from a library is called from a source file, only
the modules that contain that routine will be linked in
with the application. This allows large libraries to be
used efficiently in many different applications.
The object linker/library features include:
• Efficient linking of single libraries instead of many
smaller files
• Enhanced code maintainability by grouping
related modules together
• Flexible creation of libraries with easy module
listing, replacement, deletion and extraction
28.5
MPLAB Assembler, Linker and
Librarian for Various Device
Families
MPLAB Assembler produces relocatable machine
code from symbolic assembly language for PIC24,
PIC32 and dsPIC DSC devices. MPLAB XC Compiler
uses the assembler to produce its object file. The
assembler generates relocatable object files that can
then be archived or linked with other relocatable object
files and archives to create an executable file. Notable
features of the assembler include:
•
•
•
•
•
•
Support for the entire device instruction set
Support for fixed-point and floating-point data
Command-line interface
Rich directive set
Flexible macro language
MPLAB X IDE compatibility
• Integration into MPLAB X IDE projects
• User-defined macros to streamline
assembly code
• Conditional assembly for multipurpose
source files
• Directives that allow complete control over the
assembly process
 2013-2015 Microchip Technology Inc.
DS40001722C-page 311
PIC16(L)F1703/7
28.6
MPLAB X SIM Software Simulator
The MPLAB X SIM Software Simulator allows code
development in a PC-hosted environment by simulating the PIC MCUs and dsPIC DSCs on an instruction
level. On any given instruction, the data areas can be
examined or modified and stimuli can be applied from
a comprehensive stimulus controller. Registers can be
logged to files for further run-time analysis. The trace
buffer and logic analyzer display extend the power of
the simulator to record and track program execution,
actions on I/O, most peripherals and internal registers.
The MPLAB X SIM Software Simulator fully supports
symbolic debugging using the MPLAB XC Compilers,
and the MPASM and MPLAB Assemblers. The software simulator offers the flexibility to develop and
debug code outside of the hardware laboratory environment, making it an excellent, economical software
development tool.
28.7
MPLAB REAL ICE In-Circuit
Emulator System
The MPLAB REAL ICE In-Circuit Emulator System is
Microchip’s next generation high-speed emulator for
Microchip Flash DSC and MCU devices. It debugs and
programs all 8, 16 and 32-bit MCU, and DSC devices
with the easy-to-use, powerful graphical user interface of
the MPLAB X IDE.
The emulator is connected to the design engineer’s
PC using a high-speed USB 2.0 interface and is
connected to the target with either a connector
compatible with in-circuit debugger systems (RJ-11)
or with the new high-speed, noise tolerant, LowVoltage Differential Signal (LVDS) interconnection
(CAT5).
The emulator is field upgradeable through future firmware downloads in MPLAB X IDE. MPLAB REAL ICE
offers significant advantages over competitive emulators
including full-speed emulation, run-time variable
watches, trace analysis, complex breakpoints, logic
probes, a ruggedized probe interface and long (up to
three meters) interconnection cables.
DS40001722C-page 312
28.8
MPLAB ICD 3 In-Circuit Debugger
System
The MPLAB ICD 3 In-Circuit Debugger System is
Microchip’s most cost-effective, high-speed hardware
debugger/programmer for Microchip Flash DSC and
MCU devices. It debugs and programs PIC Flash
microcontrollers and dsPIC DSCs with the powerful,
yet easy-to-use graphical user interface of the MPLAB
IDE.
The MPLAB ICD 3 In-Circuit Debugger probe is
connected to the design engineer’s PC using a highspeed USB 2.0 interface and is connected to the target
with a connector compatible with the MPLAB ICD 2 or
MPLAB REAL ICE systems (RJ-11). MPLAB ICD 3
supports all MPLAB ICD 2 headers.
28.9
PICkit 3 In-Circuit Debugger/
Programmer
The MPLAB PICkit 3 allows debugging and programming of PIC and dsPIC Flash microcontrollers at a most
affordable price point using the powerful graphical user
interface of the MPLAB IDE. The MPLAB PICkit 3 is
connected to the design engineer’s PC using a fullspeed USB interface and can be connected to the target via a Microchip debug (RJ-11) connector (compatible with MPLAB ICD 3 and MPLAB REAL ICE). The
connector uses two device I/O pins and the Reset line
to implement in-circuit debugging and In-Circuit Serial
Programming™ (ICSP™).
28.10 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
PIC devices without a PC connection. It can also set
code protection in this mode. The MPLAB PM3
connects to the host PC via an RS-232 or USB cable.
The MPLAB PM3 has high-speed communications and
optimized algorithms for quick programming of large
memory devices, and incorporates an MMC card for file
storage and data applications.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
28.11 Demonstration/Development
Boards, Evaluation Kits, and
Starter Kits
A wide variety of demonstration, development and
evaluation boards for various PIC MCUs and dsPIC
DSCs allows quick application development on fully
functional systems. Most boards include prototyping
areas for adding custom circuitry and provide application firmware and source code for examination and
modification.
The boards support a variety of features, including LEDs,
temperature sensors, switches, speakers, RS-232
interfaces, LCD displays, potentiometers and additional
EEPROM memory.
28.12 Third-Party Development Tools
Microchip also offers a great collection of tools from
third-party vendors. These tools are carefully selected
to offer good value and unique functionality.
• Device Programmers and Gang Programmers
from companies, such as SoftLog and CCS
• Software Tools from companies, such as Gimpel
and Trace Systems
• Protocol Analyzers from companies, such as
Saleae and Total Phase
• Demonstration Boards from companies, such as
MikroElektronika, Digilent® and Olimex
• Embedded Ethernet Solutions from companies,
such as EZ Web Lynx, WIZnet and IPLogika®
The demonstration and development boards can be
used in teaching environments, for prototyping custom
circuits and for learning about various microcontroller
applications.
In addition to the PICDEM™ and dsPICDEM™
demonstration/development board series of circuits,
Microchip has a line of evaluation kits and demonstration software for analog filter design, KEELOQ® security
ICs, CAN, IrDA®, PowerSmart battery management,
SEEVAL® evaluation system, Sigma-Delta ADC, flow
rate sensing, plus many more.
Also available are starter kits that contain everything
needed to experience the specified device. This usually
includes a single application and debug capability, all
on one board.
Check the Microchip web page (www.microchip.com)
for the complete list of demonstration, development
and evaluation kits.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 313
PIC16(L)F1703/7
29.0
PACKAGING INFORMATION
29.1
Package Marking Information
14-Lead PDIP (300 mil)
Example
PIC16F1703
-I/P e3
1331017
28-Lead SOIC (7.50 mm)
14-Lead SOIC (3.90 mm)
Example
Example
PIC16F1703
-I/SL e3
1331017
14-Lead TSSOP (4.4 mm)
XXXXXXXX
YYWW
NNN
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
DS40001722C-page 314
Example
F1703IST
1331
017
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.
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Package Marking Information (Continued)
16-Lead QFN (4x4x0.9 mm)
PIN 1
Example
PIN 1
PIC16
F1703
-I/ML
331017
e3
20-Lead PDIP (300 mil)
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
YYWWNNN
20-Lead SSOP (5.30 mm)
Example
PIC16F1707
-E/P e3
1331017
Example
PIC16F1707
-E/SS e3
1331017
20-Lead SOIC (7.50 mm)
Example
PIC16F1707
-E/SO e3
1331017
 2013-2015 Microchip Technology Inc.
DS40001722C-page 315
PIC16(L)F1703/7
Package Marking Information (Continued)
20-Lead QFN (4x4x0.9 mm)
PIN 1
Example
PIN 1
PIC16
F1707
E/ML
331017
e3
DS40001722C-page 316
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
29.2
Package Details
The following sections give the technical details of the packages.
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DS40001722C-page 317
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS40001722C-page 318
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2013-2015 Microchip Technology Inc.
DS40001722C-page 319
PIC16(L)F1703/7
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 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2013-2015 Microchip Technology Inc.
DS40001722C-page 321
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS40001722C-page 322
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2013-2015 Microchip Technology Inc.
DS40001722C-page 323
PIC16(L)F1703/7
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 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2013-2015 Microchip Technology Inc.
DS40001722C-page 325
PIC16(L)F1703/7
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DS40001722C-page 326
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
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DS40001722C-page 327
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS40001722C-page 328
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2013-2015 Microchip Technology Inc.
DS40001722C-page 329
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS40001722C-page 330
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2013-2015 Microchip Technology Inc.
DS40001722C-page 331
PIC16(L)F1703/7
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 2013-2015 Microchip Technology Inc.
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 2013-2015 Microchip Technology Inc.
DS40001722C-page 333
PIC16(L)F1703/7
APPENDIX A:
DATA SHEET
REVISION HISTORY
Revision A (10/2013)
Initial release of this document.
Revision B (02/2015)
Changed from Preliminary to Final data sheet.
Added Section 3.2: High-Endurance Flash.
Removed Figures 6-3, 6-4, 6-6, 6-10.
Removed Sections 6.2.1.2, 6.2.1.3, 6.2.1.6, 6.3.2, 6.4,
6.4.2, 6.5.
Replaced Section 18.0.
Updated Figures 2-1, 6-1, 6-2, 6-10, 7-2, 7-3, 14-1,
16-1, 17-1.
Updated PIC16(L)F170x Family Types Table.
Updated Registers 4-1, 6-1, 6-2, 14-1, 16-1, 16-2, 17-1.
Updated Section 23.0 from SSP to SSPx.
Updated Sections 6.1, 6.2, 6.2.1, 6.2.1.1, 6.2.2,
6.2.2.1, 6.2.2.2, 6.2.2.4, 6.2.2.6, 6.3.1, 8.2.2, 11.3.6,
16.1.3, 17.0, 17.1, 17.1.1.
Updated Tables 1, 2, 1-2, 1-3, 3-1, 6-1, 6-2, 26-18.
Revision C (09/2015)
Added High Endurance Flash Data Memory (HEF)
bullet on front page. Updated PIC16(L)F170x Family
Types Table. Updated graphs 27-63 through 27-70.
DS40001722C-page 334
 2013-2015 Microchip Technology Inc.
PIC16(L)F1703/7
THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our web site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
Users of Microchip products can receive assistance
through several channels:
• Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
• General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
• Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers
should
contact
their
distributor,
representative or Field Application Engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical support is available through the web site
at: http://www.microchip.com/support
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on
“Customer Change Notification” and follow the
registration instructions.
 2013-2015 Microchip Technology Inc.
DS40001722C-page 335
PIC16(L)F1703/7
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
[X](1)
PART NO.
Device
-
X
Tape and Reel Temperature
Option
Range
/XX
XXX
Package
Pattern
Examples:
a)
b)
Device:
PIC16F1703, PIC16LF1703,
PIC16F1707, 7PIC16LF1707
Tape and Reel
Option:
Blank
T
= Standard packaging (tube or tray)
= Tape and Reel(1)
Temperature
Range:
I
E
= -40C to +85C
= -40C to +125C
Package:(2)
ML
P
SL
SO
SS
ST
=
=
=
=
=
=
Pattern:
(Industrial)
(Extended)
QFN
PDIP
SOIC
SOIC
SSOP
TSSOP
QTP, SQTP, Code or Special Requirements
(blank otherwise)
DS40001722C-page 336
PIC16LF1703- I/P
Industrial temperature
PDIP package
PIC16F1707- E/SS
Extended temperature,
SSOP package
Note
1:
2:
Tape and Reel identifier only appears in
the catalog part number description. This
identifier is used for ordering purposes and
is not printed on the device package.
Check with your Microchip Sales Office
for package availability with the Tape and
Reel option.
Small form-factor packaging options may
be available. Please check
www.microchip.com/packaging for
small-form factor package availability, or
contact your local Sales Office.
 2013-2015 Microchip Technology Inc.
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
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights unless otherwise stated.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,
LANCheck, MediaLB, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,
SST, SST Logo, SuperFlash and UNI/O are registered
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
The Embedded Control Solutions Company and mTouch are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,
KleerNet logo, MiWi, motorBench, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O,
Total Endurance, TSHARC, USBCheck, VariSense,
ViewSpan, WiperLock, Wireless DNA, 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.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology
Germany II GmbH & Co. KG, a subsidiary of Microchip
Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2013-2015, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
ISBN: 978-1-63277-846-8
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
 2013-2015 Microchip Technology Inc.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS40001722C-page 337
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
China - Beijing
Tel: 86-10-8569-7000
Fax: 86-10-8528-2104
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Germany - Dusseldorf
Tel: 49-2129-3766400
Hong Kong
Tel: 852-2943-5100
Fax: 852-2401-3431
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
Austin, TX
Tel: 512-257-3370
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Cleveland
Independence, OH
Tel: 216-447-0464
Fax: 216-447-0643
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Novi, MI
Tel: 248-848-4000
Houston, TX
Tel: 281-894-5983
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
New York, NY
Tel: 631-435-6000
San Jose, CA
Tel: 408-735-9110
Canada - Toronto
Tel: 905-673-0699
Fax: 905-673-6509
China - Dongguan
Tel: 86-769-8702-9880
China - Hangzhou
Tel: 86-571-8792-8115
Fax: 86-571-8792-8116
Germany - Karlsruhe
Tel: 49-721-625370
India - Pune
Tel: 91-20-3019-1500
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
Italy - Venice
Tel: 39-049-7625286
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Kaohsiung
Tel: 886-7-213-7828
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Poland - Warsaw
Tel: 48-22-3325737
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
Sweden - Stockholm
Tel: 46-8-5090-4654
UK - Wokingham
Tel: 44-118-921-5800
Fax: 44-118-921-5820
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
07/14/15
DS40001722C-page 338
 2013-2015 Microchip Technology Inc.