CQ82C55A Intersil, CQ82C55A Datasheet - Page 13

• Manufacturer Part Number: CQ82C55A
• Description: IC I/O EXPANDER 24B 44MQFP
• Manufacturer: Intersil
• Series: -r

Specifications of CQ82C55A

• Interface: Programmable
• Number Of I /o: 24
• Interrupt Output: No
• Frequency - Clock: -
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFP
• Includes: -
• Lead Free Status / Rohs Status: Contains lead / RoHS non-compliant

MODE 2 AND MODE 0 (INPUT)
MODE 2 AND MODE 1 (OUTPUT)
CONTROL WORD
CONTROL WORD
D7
D7
1
1
D6 D5 D4 D3 D2 D1 D0
D6 D5 D4 D3 D2 D1 D0
1
1
PC2-PC0
1 = INPUT
0 = OUTPUT
RD
WR
RD
WR
0
1
1
0
1/0
13
PC2-PC0
PB7-PB0
PA7-PA0
PB7-PB0
PA7-PA0
PC3
PC7
PC6
PC4
PC5
PC3
PC7
PC6
PC4
PC5
PC1
PC2
PC0
FIGURE 14. MODE 2 COMBINATIONS
3
8
8
8
8
INTRA
OBFA
ACKA
STBA
IBFA
INTRA
OBFA
ACKA
STBA
IBFA
OBFB
ACKB
INTRB
I/O
82C55A
MODE 2 AND MODE 0 (OUTPUT)
MODE 2 AND MODE 1 (INPUT)
CONTROL WORD
CONTROL WORD
D7
D7
1
1
D6 D5 D4 D3 D2 D1 D0
D6 D5 D4 D3 D2 D1 D0
1
1
PC2-PC0
1 = INPUT
0 = OUTPUT
0
RD
WR
1
RD
WR
0
1
1/0
PB7, PB0
PC2-PC0
PA7-PA0
PB7-PB0
PA7-PA0
PC3
PC7
PC6
PC4
PC5
PC3
PC7
PC6
PC4
PC5
PC2
PC1
PC0
November 16, 2006
3
8
8
8
8
FN2969.10
INTRA
OBFA
ACKA
STBA
IBFA
INTRA
OBFA
ACKA
STBA
IBFA
STBB
IBFB
INTRB
I/O