PIC16F639 Microchip Technology Inc., PIC16F639 Datasheet - Page 12

• Manufacturer Part Number: PIC16F639
• Description: 8/14-pin Flash-based, 8-bit Cmos Microcontrollers With Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

PIC12F635/PIC16F636/639
FIGURE 1-2:
DS41232D-page 10
T0CKI
OSC2/CLKOUT
OSC1/CLKIN
Program
Cryptographic
Bus
Oscillator
Module
Internal
Timer0
8 MHz
Generation
Instruction Reg
Decode and
Configuration
Instruction
Timing
PIC16F636 BLOCK DIAGRAM
14
Control
Program
2K x 14
Memory
Flash
Oscillator
Internal
31 kHz
C1IN- C1IN+ C1OUT C2IN- C2IN+ C2OUT
8
13
MCLR V
Low-Voltage Detect
2 Analog Comparators
Direct Addr
Programmable
Start-up Timer
Program Counter
and Reference
Brown-out
Watchdog
Power-up
Power-on
Oscillator
8-level Stack
Wake-up
Timer
Reset
Timer
Reset
Reset
(13-bit)
DD
V
SS
7
RAM Addr
8
3
Data Bus
Registers
Addr MUX
W Reg
T1CKI
ALU
bytes
RAM
128
File
STATUS Reg
Timer1
FSR Reg
8
9
MUX
T1G
256 bytes
EEPROM
EEADDR
EEDAT
Indirect
Addr
Data
8
© 2007 Microchip Technology Inc.
PORTA
PORTC
RA0
RA1
RA2
RA3
RA4
RA5
RC0
RC1
RC2
RC3
RC4
RC5