Intel MCS48 User Manual page 316

8255A/8255A-5
CONTROL WORD
#4
D
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CONTROL WORD
#5
D
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D
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D
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D
4
D
3
D
2
D,
D
10 10
1
CONTROL
WORD
#9
D
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D
6
D
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D
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D
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PC
CONTROL
WORD
#6
D
7
D
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D
5
D
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D
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D
1
D
10 10 10
CONTROL
WORD
#10
D
7
D
6
D
5
D
4
D
3
D
2
D,
D
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Z
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CONTROL
WORD
#7
CONTROL WORD
#11
D
7
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D
4
D
3
D
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D,
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10
10 11
D
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D
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D
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8-26
00744A