1999 Microchip Technology Inc.
Preliminary
DS30569A-page 1
Devices Included in this Data Sheet:
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
Operating speed: DC - 20 MHz clock input
DC - 200 ns instruction cycle
2K x 14 words of FLASH Program Memory
128 x 8 bytes of Data Memory (RAM)
64 x 8 bytes of EEPROM Data Memory
Pinout compatible to the PIC16CXXX 28 and 40-
pin devices
Interrupt capability (up to 11 sources)
Eight level deep hardware stack
Direct, indirect and relative addressing modes
Power-on Reset (POR)
Power-up Timer (PWRT) and
Oscillator Start-up Timer (OST)
Watchdog Timer (WDT) with its own on-chip RC
oscillator for reliable operation
Programmable code-protection
Power saving SLEEP mode
Selectable oscillator options
Low-power, high-speed CMOS FLASH/EEPROM
technology
Fully static design
In-Circuit Serial Programming
TM
(ICSP)
via two
pins
Single 5V In-Circuit Serial Programming capability
In-Circuit Debugging via two pins
Processor read/write access to program memory
Wide operating voltage range: 2.0V to 5.5V
High Sink/Source Current: 25 mA
Commercial and Industrial temperature ranges
Low-power consumption:
- < 1.6 mA typical @ 5V, 4 MHz
- 20
A typical @ 3V, 32 kHz
- < 1
A typical standby current
Pin Diagram
Peripheral Features:
Timer0: 8-bit timer/counter with 8-bit prescaler
Timer1: 16-bit timer/counter with prescaler,
can be incremented during sleep via external
crystal/clock
Timer2: 8-bit timer/counter with 8-bit period
register, prescaler and postscaler
One Capture, Compare, PWM module
- Capture is 16-bit, max. resolution is 12.5 ns
- Compare is 16-bit, max. resolution is 200 ns
- PWM max. resolution is 10-bit
10-bit multi-channel Analog-to-Digital converter
Universal Synchronous Asynchronous Receiver
Transmitter (USART/SCI) with 9-bit address
detection
Parallel Slave Port (PSP) 8-bits wide, with
external RD, WR and CS controls (40/44-pin only)
Brown-out detection circuitry for
Brown-out Reset (BOR)
PIC16F870 PIC16F871
RB7/PGD
RB6/PGC
RB5
RB4
RB3/PGM
RB2
RB1
RB0/INT
V
DD
V
SS
RD7/PSP7
RD6/PSP6
RD5/PSP5
RD4/PSP4
RC7/RX/DT
RC6/TX/CK
RC5
RC4
RD3/PSP3
RD2/PSP2
MCLR/V
PP
/THV
RA0/AN0
RA1/AN1
RA2/AN2/V
REF
-
RA3/AN3/V
REF
+
RA4/T0CKI
RA5/AN4
RE0/RD/AN5
RE1/WR/AN6
RE2/CS/AN7
V
DD
V
SS
OSC1/CLKIN
OSC2/CLKOUT
RC0/T1OSO/T1CKI
RC1/T1OSI
RC2/CCP1
RC3
RD0/PSP0
RD1/PSP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
P
I
C16F
8
7
1
PDIP
PIC16F870/871
28/40-Pin 8-Bit CMOS FLASH Microcontrollers
PIC16F870/871
DS30569A-page 4
Preliminary
1999 Microchip Technology Inc.
Table of Contents
1.0
Device Overview ................................................................................................................................................... 5
2.0
Memory Organization.......................................................................................................................................... 11
3.0
I/O Ports .............................................................................................................................................................. 27
4.0
Data EEPROM and FLASH Program Memory.................................................................................................... 39
5.0
Timer0 Module .................................................................................................................................................... 47
6.0
Timer1 Module .................................................................................................................................................... 51
7.0
Timer2 Module .................................................................................................................................................... 55
8.0
Capture/Compare/PWM Module ......................................................................................................................... 57
9.0
Addressable Universal Synchronous Asynchronous Receiver Transmitter (USART) ........................................ 63
10.0 Analog-to-Digital Converter (A/D) Module........................................................................................................... 79
11.0 Special Features of the CPU............................................................................................................................... 89
12.0 Instruction Set Summary ................................................................................................................................... 105
13.0 Development Support ....................................................................................................................................... 113
14.0 Electrical Characteristics ................................................................................................................................... 119
15.0 DC and AC Characteristics Graphs and Tables................................................................................................ 135
16.0 Packaging Information ...................................................................................................................................... 137
Index .......................................................................................................................................................................... 145
On-Line Support .......................................................................................................................................................... 151
Reader Response ....................................................................................................................................................... 152
Product Identification System...................................................................................................................................... 153
To Our Valued Customers
Most Current Data Sheet
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Errata
An errata sheet may exist for current devices, describing minor operational differences (from the data sheet) and recommended
workarounds. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revi-
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Corrections to this Data Sheet
We constantly strive to improve the quality of all our products and documentation. We have spent a great deal of time to ensure
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1999 Microchip Technology Inc.
Preliminary
DS30569A-page 5
PIC16F870/871
1.0
DEVICE OVERVIEW
This document contains device-specific information.
Additional information may be found in the PICmicroTM
Mid-Range Reference Manual, (DS33023), which may
be obtained from your local Microchip Sales Represen-
tative or downloaded from the Microchip website. The
Reference Manual should be considered a comple-
mentary document to this data sheet, and is highly rec-
ommended reading for a better understanding of the
device architecture and operation of the peripheral
modules.
There are two devices (PIC16F870 and PIC16F871)
covered by this data sheet. The PIC16F870 device
comes in a 28-pin package and the PIC16F871 device
comes in a 40-pin package. The 28-pin device does not
have a Parallel Slave Port implemented.
The following two figures are device block diagrams
sorted by pin number; 28-pin for Figure 1-1 and 40-pin
for Figure 1-2. The 28-pin and 40-pin pinouts are listed
in Table 1-1 and Table 1-2, respectively.
FIGURE 1-1:
PIC16F870 BLOCK DIAGRAM
FLASH
Program
Memory
13
Data Bus
8
14
Program
Bus
Instruction reg
Program Counter
8 Level Stack
(13-bit)
RAM
File
Registers
Direct Addr
7
RAM Addr (1)
9
Addr MUX
Indirect
Addr
FSR reg
STATUS reg
MUX
ALU
W reg
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Instruction
Decode &
Control
Timing
Generation
OSC1/CLKIN
OSC2/CLKOUT
MCLR
V
DD
, V
SS
PORTA
PORTB
PORTC
RA4/T0CKI
RA5/AN4
RB0/INT
RC0/T1OSO/T1CKI
RC1/T1OSI
RC2/CCP1
RC3
RC4
RC5
RC6/TX/CK
RC7/RX/DT
8
8
Brown-out
Reset
Note 1: Higher order bits are from the STATUS register.
USART
CCP1
10-bit A/D
Timer0
Timer1
Timer2
RA3/AN3/V
REF
+
RA2/AN2/V
REF
-
RA1/AN1
RA0/AN0
8
3
Data EEPROM
RB1
RB2
RB3/PGM
RB4
RB5
RB6/PGC
RB7/PGD
Device
Program
FLASH
Data Memory
Data
EEPROM
PIC16F870
2K
128 Bytes
64 Bytes
In-Circuit
Debugger
Low-Voltage
Programming
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