PIC16F631_08 Datasheet, PDF (15/306 Pages) Microchip Technology – 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F631/677/685/687/689/690
FIGURE 1-5:
PIC16F690 BLOCK DIAGRAM
Configuration
Flash
4k x 14
Program
Memory
INT
13
Program Counter
8-Level Stack (13-bit)
Program ₁₄
Bus
Instruction Reg
Direct Addr
7
8
3
Instruction
Decode and
Control
Power-up
Timer
Oscillator
Start-up Timer
OSC1/CLKI
Power-on
8
Reset
Timing
OSC2/CLKO _Generation
Watchdog
Timer
Internal
Oscillator
Block
Brown-out
Reset
MCLR VDD VSS
ULPWU
T0CKI
T1G T1CKI
Data Bus
8
RAM
256 bytes
File
Registers
RAM Addr
9
Addr MUX
Indirect
8
Addr
FSR Reg
STATUS Reg
MUX
ALU
W Reg
TX/CK RX/DT
PORTA
PORTB
RA0
RA1
RA2
RA3
RA4
RA5
RB4
RB5
RB6
RB7
PORTC
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
CCP1/
SDI/ SCK/
P1A
P1B P1C P1D
SDO SDA SCL SS
Ultra Low-Power
Wake-up
Timer0
Timer1
Timer2
EUSART
ECCP+
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
© 2008 Microchip Technology Inc.
DS41262E-page 13