PIC16F627A_05 Datasheet, PDF (12/180 Pages) Microchip Technology – Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F627A/628A/648A
FIGURE 3-1:
BLOCK DIAGRAM
Flash
Program
Memory
13
Program Counter
8-Level Stack
(13-bit)
Data Bus
8
RAM
File
Registers
Program
Bus
14
Instruction Reg
RAM Addr (1) 9
Addr MUX
Direct Addr ⁷
Indirect
8 Addr
FSR Reg
Status Reg
8
Instruction
Decode &
Control
OSC1/CLKIN
OSC2/CLKOUT
Timing
Generation
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
Low-Voltage
Programming
3
MUX
ALU
8
W Reg
PORTA
PORTB
RA0/AN0
RA1/AN1
RA2/AN2/VREF
RA3/AN3/CMP1
RA4/T0CK1/CMP2
RA5/MCLR/VPP
RA6/OSC2/CLKOUT
RA7/OSC1/CLKIN
RB0/INT
RB1/RX/DT
RB2/TX/CK
RB3/CCP1
RB4/PGM
RB5
RB6/T1OSO/T1CKI/PGC
RB7/T1OSI/PGD
Comparator
MCLR VDD, VSS
Timer0
Timer1
Timer2
VREF
CCP1
USART
Note 1: Higher order bits are from the Status register.
Data EEPROM
DS40044D-page 10
© 2005 Microchip Technology Inc.