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8255A-5 데이터 시트보기 (PDF) - Intel
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8255A-5
CHMOS PROGRAMMABLE PERIPHERAL INTERFACE
Intel
8255A-5 Datasheet PDF : 23 Pages
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82C55A
231256 – 18
Figure 13 MODE Control Word
231256 – 19
Figure 14 MODE 2
Figure 15 MODE 2 (Bidirectional)
NOTE
Any sequence where WR occurs before ACK and STB occurs before RD is permissible
(INTR
e
IBF
MASK
STB
RD
a
OBF
MASK
ACK
WR)
14
231256 – 20
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