IS82C55AZ Intersil, IS82C55AZ Datasheet - Page 12

• Manufacturer Part Number: IS82C55AZ
• Description: IC I/O EXPANDER 24B 44PLCC
• Manufacturer: Intersil

Specifications of IS82C55AZ

• Interface: Programmable
• Number Of I /o: 24
• Interrupt Output: No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Chip Configuration: 8 Bit
• Bus Frequency: 8MHz
• No. Of I/o's: 24
• Supply Voltage Range: 4.5V To 5.5V
• Digital Ic Case Style: LCC
• No. Of Pins: 44
• Msl: MSL 3 - 168 Hours
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Clock: -

CONTROL WORD
NOTE: Any sequence where WR occurs before ACK and STB occurs before RD is permissible. (INTR = IBF • MASK • STB • RD + OBF • MASK
• ACK • WR)
D7 D6 D5 D4 D3 D2 D1 D0
PERIPHERAL
1
1
INTR
ACK
OBF
BUS
STB
WR
IBF
RD
FIGURE 11. MODE CONTROL WORD
1/0 1/0
1/0
12
CPU TO 82C55A
DATA FROM
PC2-PC0
1 = INPUT
0 = OUTPUT
PORT B
1 = INPUT
0 = OUTPUT
GROUP B MODE
0 = MODE 0
1 = MODE 1
PERIPHERAL TO 82C55A
tWOB
DATA FROM
FIGURE 13. MODE 2 (BIDIRECTIONAL)
tPS
tSIB
82C55A
tST
tPH
82C55A TO PERIPHERAL
WR
RD
tAD
DATA FROM
tAK
tAOB
FIGURE 12. MODE 2
tKD
82C55A TO CPU
DATA FROM
INTE
INTE
1
2
tRIB
PC2-PC0
PA7-PA0
PC3
PC7
PC6
PC4
PC5
3
8
November 16, 2006
INTRA
OBFA
ACKA
STBA
IBFA
I/O
FN2969.10