82C55A Datasheet, PDF (4/23 Pages) Intel Corporation – CHMOS PROGRAMMABLE PERIPHERAL INTERFACE

82C55A
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Figure 3 82C55A Block Diagram Showing Data Bus Buffer and Read Write Control Logic Functions
NOTE
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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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