Datasheet

 1997 Microchip Technology Inc. DS30390E-page 11
PIC16C7X
FIGURE 3-2: PIC16C73/73A/76 BLOCK DIAGRAM
EPROM
Program
Memory
13
Data Bus
8
14
Program
Bus
Instruction reg
Program Counter
8 Level Stack
(13-bit)
RAM
File
Registers
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
USART
PORTA
PORTB
PORTC
RB0/INT
RB7:RB1
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
8
8
Brown-out
Reset
(2)
Note 1: Higher order bits are from the STATUS register.
2: Brown-out Reset is not available on the PIC16C73.
CCP1 CCP2
Synchronous
A/DTimer0 Timer1 Timer2
Serial Port
RA4/T0CKI
RA5/SS
/AN4
RA3/AN3/VREF
RA2/AN2
RA1/AN1
RA0/AN0
8
3
Device Program Memory Data Memory (RAM)
PIC16C73
PIC16C73A
PIC16C76
4K x 14
4K x 14
8K x 14
192 x 8
192 x 8
368 x 8