| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an input device which can accurately determine an ON/OFF state of a switch even when power supply voltage is changed. <P>SOLUTION: An input part 105 of a DVD player includes switches 11-15; an ADC 31 which detects voltage of a node Na which is changed upon switching of ON/OFF state of the switches 11-15; a ROM 34 which stores a set value; a CPU 33 which determines ON/OFF states of the switches 11-15 based on the voltage of the node Na and the set value; and an ADC 32 which detects power supply voltage Vcc. The CPU 33 calculates, when the power supply voltage Vcc is reduced, a set value corresponding to the power supply voltage Vcc, and determines the ON/OFF states of the switches 11-15 based on the voltage of the node Na and the calculated set value. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
