PIC16C6X
FIGURE 3-3: PIC16C63/R63/65/65A/R65 BLOCK DIAGRAM
13
8
PORTA
Data Bus
Program Counter
EPROM
RA0
RA1
RA2
RA3
RA4/T0CKI
Program
Memory
RAM
File
Registers
8 Level Stack
(13-bit)
4K x 14
192 x 8
RA5/SS
Program
Bus
14
RAM Addr(1)
PORTB
9
Addr MUX
Instruction reg
RB0/INT
RB7:RB1
Indirect
Addr
7
Direct Addr
8
FSR reg
STATUS reg
8
PORTC
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2
RC2/CCP1
3
MUX
Power-up
Timer
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
Oscillator
Instruction
Decode &
Control
Start-up Timer
ALU
Power-on
Reset
8
Timing
Generation
Watchdog
Timer
W reg
PORTD
OSC1/CLKIN
OSC2/CLKOUT
Brown-out
Reset(3)
RD0/PSP0
RD1/PSP1
RD2/PSP2
RD3/PSP3
RD4/PSP4
RD5/PSP5
RD6/PSP6
RD7/PSP7
MCLR VDD, VSS
Parallel Slave
Port
PORTE
RE0/RD
RE1/WR
RE2/CS
Timer0
USART
Timer1
Timer2
CCP1
(Note 2)
Synchronous
Serial Port
CCP2
Note 1: Higher order bits are from the STATUS register.
2: PORTD, PORTE and the Parallel Slave Port are not available on the PIC16C63/R63.
3: Brown-out Reset is not available on the PIC16C65.
DS30234D-page 12
1997 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
