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