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![Keyboard Scan (Polling Method)](https://www.iarticlesnet.com/pub/img/site/s_07.jpeg)
Keyboard Scan (Polling Method)
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日期:2024-07-10
pins is specified. It is called scanning method for matrix keyboard. When input keys are more than 4, matrix keyboard can save I/O. In Fig.1, 16 keys make up a 4....看更多