PIC16F631_08 Datasheet, PDF (14/306 Pages) Microchip Technology – 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F631/677/685/687/689/690
FIGURE 1-4:
PIC16F687/PIC16F689 BLOCK DIAGRAM
Configuration
Flash
2K⁽¹⁾/4K x 14
Program
Memory
INT
13
Program Counter
8-Level Stack (13-bit)
Program ₁₄
Bus
Instruction Reg
Direct Addr
7
Data Bus
8
PORTA
RAM
128⁽¹⁾/256 bytes
File
Registers
RAM Addr
9
Addr MUX
Indirect
8
Addr
FSR Reg
PORTB
8
OSC1/CLKI
Instruction
Decode and
Control
Timing
OSC2/CLKO _Generation
Internal
Oscillator
Block
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
MCLR VDD VSS
STATUS Reg
3
MUX
PORTC
ALU
8
W Reg
ULPWU
T0CKI
T1G T1CKI
TX/CK RX/DT
RA0
RA1
RA2
RA3
RA4
RA5
RB4
RB5
RB6
RB7
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
SDI/ SCK/
SDO SDA SCL SS
Ultra Low-Power
Wake-up
Timer0
Timer1
EUSART
Synchronous
Serial Port
AN8 AN9 AN10 AN11
Analog-to-Digital Converter
2
Analog Comparators
and Reference
EEDAT
8 ^{256 Bytes}
Data
EEPROM
EEADR
VREF AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7 C1IN- C1IN+ C1OUT C2IN- C2IN+ C2OUT
Note 1: PIC16F687 only.
DS41262E-page 12
© 2008 Microchip Technology Inc.