| 摘要 |
<p>PURPOSE:To obtain a power supply control interface corresponding to a small- scale system by using three common signal lines, a connection signal line and two switches to control a power supply interface set between processors. CONSTITUTION:When the power supply of a main controller is applied, the application instructing signal is sent to a connection adaptor 2-1 concurrently with the rise of a shared power supply Vcc. Receiving this signal, the adaptor 2-1 applies the power supply of a device to be controlled. Then the power supply application end signal is sent back from the device to be controlled. Thus the adaptor 2-1 turns off and on the transistors Tr1 and Tr2 respectively. The common part of a switch SW2 is connected to the Tr2 and therefore it is decided that the device to be controlled which must be applied to a lower stage still exists as long as the switch SW2 is connected to the side (a). Then the application instructing signal is transmitted to the lower stage and it is known that all power supplies are applied when the SW2 is connected to the side (b). Then the application end information signal is sent back to the main controller. Thus the main controller starts a system operation.</p> |
