AM4378: USB_DRVVBUS as GPIO

Hitoshi Sugawara

Part Number: AM4378

Hi Experts,

After USB_DRVVBUS is set as GPIO, it makes BUS OFF and ON.
If it is used as USB HOST, is it no problem not to use USB_DRVVBUS?

Thank you for your kind check.
Best regards,
HItoshi

over 4 years ago

0 Bin Liu over 4 years ago

TI__Guru*** 125646 points

Hi Hitoshi-san,

Hitoshi Sugawara said:
After USB_DRVVBUS is set as GPIO, it makes BUS OFF and ON.

No, it is not recommended to configure DRVVBUS pin in GPIO mode to control USB VBUS.

Hitoshi Sugawara said:
If it is used as USB HOST, is it no problem not to use USB_DRVVBUS?

Yes, if the USB is in host-only mode, you can directly connect the USBx_VBUS pin to 5V power rail and not use USBx_DRVVBUS pin.

0 Hitoshi Sugawara over 4 years ago in reply to Bin Liu

TI__Mastermind 18650 points

HI Bin,

Thank you for your kind clarification.

Will follow the advice.
Best regards,
Hioshi

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AM4378: USB_DRVVBUS as GPIO