IN82C55
FEATURES
- -
- -
- -
- -
- - a D . w
S a t patible with all Intel and Most Other Microprocessors High Speed, «Zero Wait State» Operation with 8MHz 8086/88 and 80186/188 24 Programmable I/O Pins Low Power CHMOS pletely TTL patible Control Word Read-Back Capability Direct Bit Set/Reset Capability 2.5m A DC Drive Capability on all I/O Port Outputs Available in 40-Pin DIP Available in EXPRESS
- Standard Temperature Range
- Extended Temperature Range
- GROUP A CONTROL
D7-D0
DATA BUS BUFFER w w w t a .D
S a e h
PA7-PA0 PC7-PC4
U 4 t e
PA3 PA2 PA1 PA0 RD CS VSS A1 A0 PC7 PC6 PC5 PC4 PC0 PC1 PC2 PC3 PB0 PB1 PB2
.c m o
GROUP A PORT A (8)
GROUP A PORT C UPPER (4) GROUP B PORT C LOWER (4)
8 BIT INTERNAL DATA BUS
PC3-PC0
RD WR A1 A0 Reset
READ/ WRITE CONTROL LOGIC
GROUP B CONTROL
GROUP B PORT B (8)
PB7-PB0
Figure 1 w w w a D . Figure 2
1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11 12 13 14 15 16 17 18 19 20
S a t
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 e...
