PIC16F871-I/PT Microchip Technology Inc., PIC16F871-I/PT Datasheet - Page 7

• Manufacturer Part Number: PIC16F871-I/PT
• Description: 44 PIN, 7 KB FLASH, 128 RAM, 33 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F871-I/PT

• A/d Inputs: 8-Channel, 10-Bit
• Cpu Speed: 5 MIPS
• Eeprom Memory: 64 Bytes
• Input Output: 33
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

1.0
This document contains device specific information.
Additional information may be found in the PICmicro
Mid-Range
(DS33023), which may be obtained from your local
Microchip Sales Representative or downloaded from
the Microchip web site. The Reference Manual should
be considered a complementary document to this data
sheet, and is highly recommended reading for a better
understanding of the device architecture and operation
of the peripheral modules.
FIGURE 1-1:
 2003 Microchip Technology Inc.
Note 1:
Data EEPROM
PIC16F870
Device
Timer0
OSC1/CLKI
OSC2/CLKO
DEVICE OVERVIEW
Higher order bits are from the STATUS register.
Program
MCU
Bus
Program FLASH
Instruction reg
Generation
PIC16F870 BLOCK DIAGRAM
Instruction
Decode &
Family
14
Program
Control
Memory
Timing
FLASH
2K
Timer1
CCP1
Reference
8
13
Data Memory
MCLR
128 Bytes
Direct Addr
Start-up Timer
Program Counter
Programming
Low-Voltage
Brown-out
8 Level Stack
Watchdog
Debugger
Power-up
Power-on
Oscillator
In-Circuit
Timer
Reset
Timer
Reset
(13-bit)
V
DD
Manual
Timer2
, V
SS
7
TM
RAM Addr (1)
Data EEPROM
64 Bytes
8
3
Data Bus
Addr MUX
Registers
W reg
ALU
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.
RAM
File
STATUS reg
10-bit A/D
FSR reg
USART
9
MUX
8
Indirect
Addr
8
PIC16F870/871
PORTB
PORTC
PORTA
RA0/AN0
RA1/AN1
RA2/AN2/V
RA3/AN3/V
RA4/T0CKI
RA5/AN4
RB0/INT
RB1
RB2
RB3/PGM
RB4
RB5
RB6/PGC
RB7/PGD
RC0/T1OSO/T1CKI
RC1/T1OSI
RC2/CCP1
RC3
RC4
RC5
RC6/TX/CK
RC7/RX/DT
DS30569B-page 5
REF
REF
-
+