| 摘要 |
In an electronic system and a power supply device thereof, the power supply device supplies electric power to an electronic device in the electronic system. When the electronic device is shut down, the electronic device transmits a shutdown signal to the power supply device, so that the power supply device stops supplying electric power to the electronic device. And, when the electronic device is switched on, the electronic device transmits a start signal to the power supply device, so that the power supply device starts supplying electric power to the electronic device. Therefore, power consumption by the power supply device when the electronic device is shut down can be reduced.
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