PIC16F636T-I Datasheet, PDF (13/234 Pages) Microchip Technology – 8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC12F635/PIC16F636/639
FIGURE 1-3:
PIC16F639 BLOCK DIAGRAM
Configuration
Flash
2K x 14
Program
Memory
Program ₁₄
Bus
Instruction Reg
13
Program Counter
Data Bus
8
8-level Stack
(13-bit)
RAM
128
bytes
File
Registers
RAM Addr ⁽¹⁾
9
Addr MUX
Direct Addr ⁷
Indirect
8
Addr
FSR Reg
STATUS Reg
8
Instruction
Decode and
Control
OSC1/CLKIN
Timing
Generation
OSC2/CLKOUT
8 MHz
Internal
Oscillator
31 kHz
Internal
Oscillator
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
Programmable
Low-voltage Detect
Wake-up
Reset
3
MUX
ALU
8
W Reg
T1CKI T1G
T0CKI
Timer0
MCLR ^{VDD VSS}
Timer1
PORTA
PORTC
RA0
RA1
RA2
RA3
RA4
RA5
RC0
RC1
RC2
RC3
RC4
RC5
VDDT
VSST
LCCOM
125 kHz
Analog Front-End
(AFE)
LCX LCY LCZ
KEELOQ Module
2 Analog
Comparators
and Reference
C1IN- C1IN+ C1OUT C2IN- C2IN+ C2OUT
EEDAT
256 bytes
DATA
EEPROM
EEADDR
© 2007 Microchip Technology Inc.
DS41232D-page 11