PIC16C7X
FIGURE 3-2:
PIC16C73/73A/76 BLOCK DIAGRAM
Device
PIC16C73
PIC16C73A
PIC16C76
Program Memory Data Memory (RAM)
4K x 14
4K x 14
8K x 14
192 x 8
192 x 8
368 x 8
13
Program Counter
EPROM
Program
Memory
8 Level Stack
(13-bit)
RAM
File
Registers
RAM Addr
(1)
9
PORTB
Data Bus
8
PORTA
RA0/AN0
RA1/AN1
RA2/AN2
RA3/AN3/V
REF
RA4/T0CKI
RA5/SS/AN4
Program
Bus
14
Instruction reg
Direct Addr
7
Addr MUX
8
Indirect
Addr
RB0/INT
RB7:RB1
FSR reg
STATUS reg
8
3
Power-up
Timer
Instruction
Decode &
Control
Timing
Generation
OSC1/CLKIN
OSC2/CLKOUT
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
(2)
8
W reg
ALU
PORTC
MUX
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
MCLR
V
DD
, V
SS
Timer0
Timer1
Timer2
A/D
CCP1
CCP2
Synchronous
Serial Port
USART
Note 1: Higher order bits are from the STATUS register.
2: Brown-out Reset is not available on the PIC16C73.
©
1997 Microchip Technology Inc.
DS30390E-page 11
MICROCHIP [ MICROCHIP TECHNOLOGY ]
