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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 – 3
Figure 3 82C55A Block Diagram Showing Data Bus Buffer and Read Write Control Logic Functions
NOTE
231256 – 4
Port pins loaded with more than 20 pF capacitance may not have their logic level guaranteed following a hardware reset
Figure 4 Port A B C Bus-hold Configuration
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