參數(shù)資料
型號(hào): 82C55A
廠商: Harris Corporation
英文描述: CMOS Programmable Peripheral Interface
中文描述: CMOS可編程外設(shè)接口
文件頁(yè)數(shù): 20/26頁(yè)
文件大?。?/td> 234K
代理商: 82C55A
20
FIGURE 28. MODE 1 (STROBED OUTPUT)
FIGURE 29. MODE 2 (BI-DIRECTIONAL)
NOTE: Any sequence where WR occurs before ACK and STB occurs before RD is permissible. (INTR = IBF
MASK
STB
RD
OBF
MASK
ACK
WR)
Timing Waveforms
(Continued)
tWOB (21)
tWB (12)
tAK (15)
tAIT (27)
tAOB (22)
tWIT
(28)
OBF
WR
INTR
ACK
OUTPUT
tWOB
(21)
tAOB
(22)
tAK
(15)
tAD (19)
tKD
(20)
tPH (18)
tPS (17)
tSIB
(23)
tST
(16)
OBF
WR
INTR
ACK
IBF
STB
PERIPHERAL
BUS
RD
tRIB (24)
DATA FROM
PERIPHERAL TO 82C55A
DATA FROM
82C55A TO PERIPHERAL
DATA FROM
82C55A TO CPU
DATA FROM
CPU TO 82C55A
(NOTE)
(NOTE)
82C55A
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