p16f877 Microchip Technology Inc., p16f877 Datasheet - Page 8

• Manufacturer Part Number: p16f877
• Description: 28/40-pin 8-bit Cmos Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

PIC16F87X
FIGURE 1-2:
DS30292C-page 6
PIC16F874
PIC16F877
Data EEPROM
Note 1: Higher order bits are from the STATUS register.
Device
Timer0
OSC2/CLKOUT
OSC1/CLKIN
Program
Bus
Program
FLASH
Instruction reg
Generation
Instruction
PIC16F874 AND PIC16F877 BLOCK DIAGRAM
Decode &
4K
8K
14
FLASH
Program
Control
Memory
Timing
CCP1,2
Timer1
Data Memory
192 Bytes
368 Bytes
8
13
MCLR
Direct Addr
Start-up Timer
Program Counter
Programming
Low-Voltage
8 Level Stack
Brown-out
Watchdog
Debugger
Power-up
Power-on
Oscillator
In-Circuit
Timer
Reset
Timer
Reset
(13-bit)
Synchronous
V
Serial Port
DD
Timer2
, V
EEPROM
128 Bytes
256 Bytes
SS
7
Data
RAM Addr
8
3
(1)
Data Bus
Addr MUX
Registers
W reg
ALU
Parallel Slave Port
RAM
File
STATUS reg
FSR reg
10-bit A/D
USART
9
MUX
8
Indirect
Addr
8
PORTC
PORTD
PORTA
PORTB
PORTE
2001 Microchip Technology Inc.
RD0/PSP0
RD1/PSP1
RD2/PSP2
RD3/PSP3
RD4/PSP4
RD5/PSP5
RD6/PSP6
RD7/PSP7
RA0/AN0
RA1/AN1
RA2/AN2/V
RA3/AN3/V
RA4/T0CKI
RA5/AN4/SS
RB0/INT
RB1
RB2
RB3/PGM
RB4
RB5
RB6/PGC
RB7/PGD
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
RE0/AN5/RD
RE1/AN6/WR
RE2/AN7/CS
REF
REF
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