Datasheet

PIC16C7X
DS30390E-page 10  1997 Microchip Technology Inc.
FIGURE 3-1: PIC16C72 BLOCK DIAGRAM
EPROM
Program
Memory
2K x 14
13
Data Bus
8
14
Program
Bus
Instruction reg
Program Counter
8 Level Stack
(13-bit)
RAM
File
Registers
128 x 8
Direct Addr
7
RAM Addr
(1)
9
Addr MUX
Indirect
Addr
FSR reg
STATUS reg
MUX
ALU
W reg
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Instruction
Decode &
Control
Timing
Generation
OSC1/CLKIN
OSC2/CLKOUT
MCLR
VDD, VSS
Timer0
A/D
Synchronous
Serial Port
PORTA
PORTB
PORTC
RB0/INT
RB7:RB1
RC0/T1OSO/T1CKI
RC1/T1OSI
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6
RC7
8
8
Brown-out
Reset
Note 1: Higher order bits are from the STATUS register.
CCP1
Timer1 Timer2
RA4/T0CKI
RA5/SS
/AN4
RA3/AN3/VREF
RA2/AN2
RA1/AN1
RA0/AN0
8
3