PIC16C781/782
8-Bit CMOS Microcontrollers with A/D, D/A, OPAMP,
Comparators and PSMC
Microcontroller Core Features:
• High performance RISC CPU
• Only 35 single word instructions to learn
• All single cycle instructions except for program
branches which are two cycle
• Direct, indirect and relative addressing modes
- Operating speed: DC - 20 MHz clock input
DC - 200 ns instruction cycle
Device
PIC16C781
PIC16C782
Program
Memory
X14
1K
2K
Data Memory
X8
128
128
Microcontroller Core Features (Continued):
• Low power, high speed CMOS EPROM
technology
• Fully static design
• Low power consumption:
- < 2 mA @ 5V, 4 MHz
- < 1
A
typical standby current.
Pin Diagram
PDIP, Windowed CERDIP, SOIC, SSOP
RA0/AN0/OPA+
RA1/AN1/OPA-
RA4/T0CKI
RA5/MCLR/V
PP
V
SS
AV
SS
RA2/AN2/V
REF
2
RA3/AN3/V
REF
1
RB0/INT/AN4/V
R
RB1/AN5/V
DAC
•1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
20
19
18
17
16
15
14
13
12
11
RB3/AN7/OPA
RB2/AN6
RA7/OSC1/CLKIN
RA6/OSC2/CLKOUT/T1CKI
V
DD
AV
DD
RB7/C2/PSMC1B/T1G
RB6/C1/PSMC1A
RB5
RB4
PIC16C781/782
• 8-level deep hardware stack
• Interrupt capability (up to 8 internal/external
interrupt sources)
• 16 I/O pins:
- Individual direction control (13 pins)
- Input only (3 pins), low leakage (2 pins)
- Digital/Analog inputs (8 pins)
• Programmable PORTB interrupt-on-change (8 pins)
• Programmable PORTB weak pull-ups (8 pins)
• Power-on Reset (POR)
• Power-up Timer (PWRT) and
Oscillator Start-up Timer (OST)
• Watchdog Timer (WDT) with a software enabled
option and its own on-chip RC oscillator for
reliable operation
• Programmable Brown-out Reset (BOR)
• Programmable Low Voltage Detection (LVD)
• Internal/external MCLR
• Programmable code protection
• Power saving SLEEP mode
• Selectable oscillator options:
HS, XT, LP, EC, RC, INTRC (4 MHz/37 kHz)
• In-Circuit Serial Programming™ (ISCP™)
• Program Memory Read (PMR) capability
• Four user programmable ID locations
• Wide operating voltage range:
- 2.5V to 5.5V for commercial and industrial
temperature ranges
- Extended temperature range available
Peripheral Features:
• Timer0: 8-bit timer/counter with 8-bit prescaler
• Enhanced Timer1:
- 16-bit timer/counter with prescaler
- External Gate Input mode
- Option to use OSC1 and OSC2 in LP mode
as Timer1 oscillator, if INTRC oscillator mode
selected
• Analog-to-Digital Converter (ADC):
- 8-bit resolution
- Programmable 8-channel input
- Internal voltages available for self-
diagnostics
• Digital-to-Analog Converter (DAC):
- 8-bit resolution
- Reference from AV
DD
, V
REF
1, or V
R
module
- Output configurable to V
DAC
pin, Compara-
tors, and ADC reference
• Operational Amplifier module (OPA):
- Firmware initiated input offset voltage Auto
Calibration module
- Low leakage inputs
- Programmable Gain Bandwidth Product
(GBWP)
2001-2013 Microchip Technology Inc.
Preliminary
DS41171B-page 1
PIC16C781/782
Peripheral Features (Continued):
• Dual Analog Comparator module with:
- Individual enable and interrupt bits
- Programmable speed and output polarity
- Fully configurable inputs and outputs
- Reference from DAC, or V
REF
1/V
REF
2
- Low input offset voltage.
• V
R
voltage reference module:
- 3.072V +/- 0.7% @25C, AV
DD
= 5V
- Configurable output to ADC reference, DAC
reference, and V
R
pin
- 5 mA sink/source
• Programmable Switch Mode Controller module:
- PWM and PSM modes
- Programmable switching frequency
- Configurable for either single or dual
feedback inputs
- Configurable single or dual outputs
- Slope compensation output available in
single output mode
Key Features
PIC
®
Mid-Range
Reference Manual
(DS33023)
Operating Frequency
RESETS (and Delays)
Program Memory (14 bit words)
Data Memory (bytes)
Interrupts
I/O Ports
Timers
Programmable Switch Mode Controller
8-bit Analog-to-Digital Module
ADC channels
8-bit Digital-to-Analog Module
Comparators
Comparator Channels
Operational Amplifier
Voltage Reference
Brown-out Reset
Programmable Low Voltage Detect
Instruction Set
PIC16C781
PIC16C782
DC - 20 MHz
1K
128
8
13 + 3 Input only
2
1
1
8 External, 2 Internal
1
2
4 (AN<7:4>)
1
1
Yes
Yes
35 Instructions
DC - 20 MHZ
2K
128
8
13 + 3 Input only
2
1
1
8 External, 2 Internal
1
2
4 (AN<7:4>)
1
1
Yes
Yes
35 Instructions
POR, BOR, MCLR, WDT (PWRT, OST) POR, BOR, MCLR, WDT (PWRT, OST)
DS41171B-page 2
Preliminary
2001-2013 Microchip Technology Inc.
PIC16C781/782
Table of Contents
1.0 Device Overview ......................................................................................................................................................................... 5
2.0 Memory Organization ................................................................................................................................................................ 11
3.0 I/O Ports .................................................................................................................................................................................... 25
4.0 Program Memory Read (PMR) .................................................................................................................................................. 47
5.0 Timer0 Module .......................................................................................................................................................................... 51
6.0 Timer1 Module with Gate Control .............................................................................................................................................. 55
7.0 Voltage Reference Module (V
R
) ................................................................................................................................................ 61
8.0 Programmable Low Voltage Detect Module (PLVD) ................................................................................................................. 63
9.0 Analog-to-Digital Converter (ADC) Module ............................................................................................................................... 69
10.0 Digital-to-Analog Converter (DAC) Module ............................................................................................................................... 79
11.0 Operational Amplifier (OPA) Module ......................................................................................................................................... 83
12.0 Comparator Module ................................................................................................................................................................... 89
13.0 Programmable Switch Mode Controller (PSMC) ....................................................................................................................... 99
14.0 Special Features of The CPU .................................................................................................................................................. 117
15.0 Instruction Set Summary ......................................................................................................................................................... 133
16.0 Development Support .............................................................................................................................................................. 141
17.0 Electrical Characteristics ......................................................................................................................................................... 147
18.0 DC and AC Characteristics Graphs and Tables ...................................................................................................................... 167
19.0 Packaging Information ............................................................................................................................................................. 169
Index .................................................................................................................................................................................................. 175
On-Line Support................................................................................................................................................................................. 181
Reader Response .............................................................................................................................................................................. 182
PIC16C781/782 Product Identification System .................................................................................................................................. 183
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2001-2013 Microchip Technology Inc.
Preliminary
DS41171B-page 3
PIC16C781/782
NOTES:
DS41171B-page 4
Preliminary
2001-2013 Microchip Technology Inc.
PIC16C781/782
1.0
DEVICE OVERVIEW
This document contains device-specific information.
Additional information may be found in the PIC Mid-
Range Reference Manual (DS33023), which may be
obtained from your local Microchip Sales Representa-
tive or downloaded from the Microchip website. The
Reference manual should be considered a comple-
mentary document to this data sheet. The Reference
manual is highly recommended reading for a better
understanding of the device architecture and operation
of the peripheral modules.
This data sheet covers two devices: PIC16C781 and
PIC16C782. Both devices come in a variety of 20-pin
packages.
The following figures are block diagrams of the
PIC16C781 and the PIC16C782.
FIGURE 1-1:
PIC16C781 BLOCK DIAGRAM
13
EPROM
Program Counter
Data Bus
8
PORTA
RA0/AN0/OPA+
RA1/AN1/OPA-
RA2/AN2/V
REF
2
RA3/AN3/V
REF
1
RA4/T0CKI
RA5/MCLR/V
PP
RA6/OSC2/CLKOUT/T1CKI
RA7/OSC1/CLKIN
PORTB
Program
Memory
1K x 14
8 Level Stack
(13-bit)
Program Memory
Read (PMR)
RAM
Program 14
Bus
Instruction reg
File
Registers
128 x 8
RAM
9
Addr
Addr MUX
Direct Addr
7
Indirect
8 Addr
FSR reg
8
3
STATUS reg
Power-up
Timer
Instruction
Decode &
Control
Timing
Generation
OSC2/
CLKOUT
Internal
RC
Oscillator
INTRC
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
MUX
RB0/INT/AN4/V
R
RB1/AN5/V
DAC
RB2/AN6
RB3/AN7/OPA
RB4
RB5
RB6/C1/PSMC1A
RB7/C2/PSMC1B/T1G
OSC1/
CLKIN
ALU
8
W reg
AV
DD
, AV
SS
(1)
V
DD
, V
SS
Timer1
(TMR1)
Voltage Reference
(V
R
) Module
Programmable
Low Voltage Detect
(PLVD)
Timer0
(TMR0)
Comparator
(C1)
Comparator
(C2)
8-bit ADC
Programmable Switch
Mode Controller
(PSMC)
OPAMP
(OPA)
8-bit
DAC
Note 1:
AV
DD
and AV
SS
pins are used by the following modules: C1, C2, OPA, DAC, ADC, and V
R
.
2001-2013 Microchip Technology Inc.
Preliminary
DS41171B-page 5
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