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What is 7402 Keyboard Interface I/O Mapping about?

This document provides a circuit diagram and description for interfacing a keyboard to a microcontroller. The circuit diagram shows the connections between ports on a microcontroller board and various components including resistors, chips, and jumper connections for configuring the interface. The description explains how to connect the interface to specific ports and addresses on a microcontroller board and how the jumper connections determine whether the interface uses memory mapped or non-mapped I/O.

Author

Ana Claudia Barbosa

Language

EN