參數(shù)資料
型號: 8406601QA
廠商: INTERSIL CORP
元件分類: 微控制器/微處理器
英文描述: CMOS Programmable Peripheral Interface
中文描述: 24 I/O, PIA-GENERAL PURPOSE, CDIP40
封裝: FRIT SEALED, CERDIP-40
文件頁數(shù): 11/26頁
文件大小: 234K
代理商: 8406601QA
11
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 (BI-DIRECTIONAL)
1
D7 D6 D5 D4 D3 D2 D1 D0
CONTROL WORD
1/0 1/0
1
1/0
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
1
PA7-PA0
ACKA
IBFA
PC4
WR
INTE
2
RD
PC3
PC5
PC2-PC0
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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