6523
6523 is TRI-PORT INTERFACE manufactured by Commodore.
FEATURES
:
- 24 individually programmable I/O lines
- pletely static operation
- Two TIL Drive Capability
- 6 directly addressable registers
- 1 MHz, 2M Hz and 3MHz operation
6523 REGISTERS
- 000 001 010 011 100 101 11 0 111
RO PRA
- Port Register A R1 PRB
- Port Register B R2 PRC
- Port Register C R3 DDRA- Data Direction Register A R4 DDRB
- Data Direction Register B R5 DDRC
- Data Direction Register Illegal States Illegal States
- NOTE: RS2, RS1, RSO respectively
ORDER NUMBER: MXS6523 -r-
'-- SPEED RANGE
=NO SUFFIX 450 ns
A =225 ns
8 = 165 ns l _ _ _ _ _ PACKAGE DESIGNATOR C=CERAMIC P=PLASTIC
2-66
6523 PIN CONFIGURATION
Vss
PAO PA1 PA2...
