| 摘要 |
In a key input device, the depression of any one of keys of a keyboard applied to same voltage to one of a plurality of analog-digital conversion input terminal contacts connected to an analog-digital conversion input terminal and one of a plurality of ordinary input terminal contacts each connected to one of a plurality of ordinary input terminals so that in accordance with the resulting analog-digital input terminal voltage and ordinary input terminal voltage, a microcomputer discriminates the depressed key. |
