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82C55 Datasheet(PDF) 10 Page - Intel Corporation |
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82C55 Datasheet(HTML) 10 Page - Intel Corporation |
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10 / 23 page ![]() 82C55A MODE 0 Configurations (Continued) 231256 – 12 Operating Modes MODE 1 (Strobed InputOutput) This functional configuration provides a means for transferring IO data to or from a specified port in conjunction with strobes or ‘‘handshaking’’ signals In mode 1 Port A and Port B use the lines on Port C to generate or accept these ‘‘handshaking’’ signals Mode 1 Basic functional Definitions Two Groups (Group A and Group B) Each group contains one 8-bit data port and one 4-bit controldata port The 8-bit data port can be either input or output Both inputs and outputs are latched The 4-bit port is used for control and status of the 8-bit data port 10 |
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