參數(shù)資料
型號(hào): IQ82C55AZ
廠商: Intersil
文件頁(yè)數(shù): 4/29頁(yè)
文件大?。?/td> 0K
描述: IC I/O EXPANDER 24B 44MQFP
標(biāo)準(zhǔn)包裝: 960
接口: 可編程
輸入/輸出數(shù): 24
中斷輸出: 無(wú)
電源電壓: 4.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 44-QFP
供應(yīng)商設(shè)備封裝: 44-MQFP(10x10)
包裝: 管件
12
FN2969.10
November 16, 2006
FIGURE 11. MODE CONTROL WORD
FIGURE 12. MODE 2
NOTE: Any sequence where WR occurs before ACK and STB occurs before RD is permissible. (INTR = IBF
MASK STB RD + OBF MASK
ACK WR)
FIGURE 13. MODE 2 (BIDIRECTIONAL)
1
D7 D6 D5 D4 D3 D2 D1 D0
CONTROL WORD
1/0 1/0
11/0
PC2-PC0
1 = INPUT
0 = OUTPUT
PORT B
1 = INPUT
0 = OUTPUT
GROUP B MODE
0 = MODE 0
1 = MODE 1
PC7
OBFA
PC6
INTE
PA7-PA0
ACKA
IBFA
PC4
WR
INTE
RD
PC3
PC5
PC2-PC0
1
2
8
STBA
3
I/O
INTRA
tWOB
tAOB
tAK
tAD
tKD
tPH
tPS
tSIB
tST
OBF
WR
INTR
ACK
IBF
STB
PERIPHERAL
BUS
RD
tRIB
DATA FROM
PERIPHERAL TO 82C55A
DATA FROM
82C55A TO PERIPHERAL
DATA FROM
82C55A TO CPU
DATA FROM
CPU TO 82C55A
82C55A
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