CQ82C55A96 Intersil, CQ82C55A96 Datasheet - Page 12
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CQ82C55A96
Manufacturer Part Number
CQ82C55A96
Description
IC I/O EXPANDER 24B 44MQFP
Manufacturer
Intersil
Series
-r
Datasheet
1.CS82C55AZ96.pdf
(29 pages)
Specifications of CQ82C55A96
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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