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82C55 Fiches technique(PDF) 7 Page - Intel Corporation |
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82C55 Fiches technique(HTML) 7 Page - Intel Corporation |
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7 / 23 page ![]() 82C55A Operating Modes Mode 0 (Basic InputOutput) This functional con- figuration provides simple input and output opera- tions for each of the three ports No ‘‘handshaking’’ is required data is simply written to or read from a specified port Mode 0 Basic Functional Definitions Two 8-bit ports and two 4-bit ports Any port can be input or output Outputs are latched Inputs are not latched 16 different InputOutput configurations are pos- sible in this Mode MODE 0 (BASIC INPUT) 231256 – 8 MODE 0 (BASIC OUTPUT) 231256 – 9 7 |
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