| 摘要 |
<p>PURPOSE:To decrease the number of signal lines set between controllers in a large scale system by fetching the information on the detecting result of a power-off state and a power-on state and outputting the power information on the power-on or power-off state of each device. CONSTITUTION:A power-off detecting means 100 receives receives the information showing the power-off state of a prescribed device out of the information on the power-on/power-off states of each device which are transferred in series and detects the power-off state of the prescribed device via the 1st and 2nd registers 111 and 112. A power state detecting means 101 fetches the information showing the power-on state sent from another signal as well as the detecting result of the power-off state and outputs the power information showing the power-on or power-off state of the device. As a result, the number of signal lines set between controllers in a large scale system.</p> |
