| 摘要 |
<p>PURPOSE:To reduce an unnecessary power consumption by smoothly conducting inter-mode switching between an operation mode and a stand-by mode of an electronic control device composed of plural electronic control units CONSTITUTION:Switches SW11-SW32 for operating each ECU respectively are connected to the ECU 1, 2, and 3. These switches are connected to a switch- on/-off detection line 4 via a diode. The switch-on/-off detection line 4 is connected to a power source (+B) via a resistor, and also to each CPU 11,21, and 31 via input interfaces. Respective CPU 11, 21, and 31 are mutually connected with a multiplex transmission line 5. The ECU 1-3 are almost concurrently switched to the operation mode when at least one switch is turned on in the stand-by mode, and are nearly simultaneously switched to the stand-by mode when all switches are turned off in the, operation mode.</p> |
