PIC16C6X
FIGURE 3-1:
PIC16C61 BLOCK DIAGRAM
13
EPROM
Program
Memory
1K x 14
Program
Bus
14
Instruction reg
Direct Addr
7
8 Level Stack
(13-bit)
Program Counter
Data Bus
8
PORTA
RA0
RA1
RA2
RA3
RA4/T0CKI
PORTB
RAM
File
Registers
36 x 8
RAM Addr
(1)
9
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
MUX
ALU
8
W reg
Timer0
MCLR
V
DD
, V
SS
Note 1: Higher order bits are from the STATUS register.
DS30234D-page 10
©
1997 Microchip Technology Inc.