Datasheet

PIC16C62X
DS30235J-page 10  2003 Microchip Technology Inc.
FIGURE 3-1: 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
Voltage
Brown-out
Reset
Note 1: Higher order bits are from the STATUS register.
Device
Program
Memory
Data Memory
(RAM)
PIC16C620
PIC16C620A
PIC16CR620A
PIC16C621
PIC16C621A
PIC16C622
PIC16C622A
512 x 14
512 x 14
512 x 14
1K x 14
1K x 14
2K x 14
2K x 14
80 x 8
96 x 8
96 x 8
80 x 8
96 x 8
128 x 8
128 x 8
8
3
TMR0
I/O Ports
PORTB
Comparator
RA3/AN3
RA2/AN2/VREF
RA1/AN1
RA0/AN0
Reference
RA4/T0CKI
+
-
+
-