PIC12F639 Microchip Technology, PIC12F639 Datasheet - Page 8

• Manufacturer Part Number: PIC12F639
• Description: (PIC12F635 / PIC12F636 / PIC12F639) 8/14-PIN FLASH-BASED / 8-BIT CMOS MICROCONTROLLERS WITH NANOWATT TECHNOLOGY
• Manufacturer: Microchip Technology

PIC12F635/PIC16F636/639
FIGURE 1-2:
DS41232B-page 6
T0CKI
OSC2/CLKOUT
OSC1/CLKIN
Program
Cryptographic
Bus
Oscillator
Module
Internal
Timer0
8 MHz
Generation
Instruction reg
Configuration
Decode and
Instruction
Timing
14
Control
Program
2K x 14
Memory
Flash
Oscillator
PIC16F636 BLOCK DIAGRAM
Internal
31 kHz
C1IN- C1IN+ C1OUT C2IN- C2IN+ C2OUT
8
13
MCLR V
2 Analog Comparators
Low-Voltage Detect
Direct Addr
Programmable
Start-up Timer
Program Counter
and Reference
Watchdog
Brown-out
Power-up
Power-on
Oscillator
8-level Stack
Wake-up
Detect
Timer
Reset
Timer
Reset
(13-bit)
DD
V
SS
7
RAM Addr
Preliminary
8
3
Data Bus
Registers
Addr MUX
W reg
T1CKI
ALU
bytes
RAM
128
File
Timer1
FSR reg
Status reg
8
MUX
9
T1G
256 bytes
EEPROM
EEADDR
EEDAT
Indirect
Addr
Data
8
PORTC
PORTA
© 2005 Microchip Technology Inc.
RA0/C1IN+/ICSPDAT/ULPWU
RA1/C1IN-/V
RA2/T0CKI/INT/C1OUT
RA3/MCLR/V
RA4/T1G/OSC2/CLKOUT
RA5/T1CKI/OSC1/CLKIN
RC0/C2IN+
RC1/C2IN-
RC2
RC3
RC4/C2OUT
RC5
REF
PP
/ICSPCLK