Datasheet

PIC16C6X
DS30234E-page 10  1997-2013 Microchip Technology Inc.
FIGURE 3-1: PIC16C61 BLOCK DIAGRAM
EPROM
Program
Memory
1K x 14
13
Data Bus
8
14
Program
Bus
Instruction reg
Program Counter
8 Level Stack
(13-bit)
RAM
File
Registers
36 x 8
Direct Addr
7
9
Addr MUX
Indirect
Addr8
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
3
PORTA
PORTB
RA1
RA4/T0CKI
RB0/INT
RB7:RB1
8
8
RAM Addr
(1)
Note 1: Higher order bits are from the STATUS register.
RA0
RA2
RA3