SEMICONDUCTOR DEVICE, AND POWER CONTROL METHOD FOR USBOTG

摘要

A semiconductor device according to an embodiment includes a transmission circuit unit including a physical unit configured to receive, from a connector for connecting to an external appliance configured to transmit a power supply signal and an identification signal, the power supply signal and the identification signal, the transmission circuit unit being configured to be able to perform data communication with the external appliance, and a power control unit configured to perform power control based on a power saving mode and a normal mode, the power control unit being configured to stop power supply to the transmission circuit unit in the power saving mode, and, to detect a connection event of the external appliance to the connector based on the power supply signal and the identification signal and to start power supply to the transmission circuit unit.

主权项

1. A semiconductor device comprising:
a transmission circuit unit including a physical unit configured to receive, from a connector for connecting to an external appliance configured to transmit a power supply signal and an identification signal, the power supply signal and the identification signal, and a transmission control unit configured to be able to detect connection of the external appliance based on the power supply signal and the identification signal received by the physical unit, the transmission circuit unit being configured to be able to perform data communication with the external appliance; and a power control unit configured to perform power control based on a power saving mode and a normal mode, the power control unit being configured to stop power supply to the transmission circuit unit in the power saving mode, and, to detect a connection event of the external appliance to the connector based on the power supply signal and the identification signal and to start power supply to the transmission circuit unit.