Keyboard input circuit

Published:2011/6/17 11:38:00 Author:John | Keyword: Keyboard | From:SeekIC

Keyboard circuit is mainly used to input data in order to achieve human-computer interaction. The design of system's keyboard is the realization of matrix keyboard through scanning. Keyboard circuit is as shown in the figure. It can be seen from the figure that this matrix keyboard is composed of lines and columns. P1.0 and P1.1 compose columns of the keyboard and P1.2, P1.3, P1.4, P1.5 and P1.6 compose lines of the keyboard. Lines of the keyboard is regarded as a keyboard’s controling output end and columns of the keyboard is regarded as a keyboard’s controling input end.



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