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AM62A7-Q1: Can we leave USB_VBUS float via some SW configuration?

Xingyu Zhu
Expert 4295 points
Part Number: AM62A7-Q1

Hi expert,

Our customer need to use the USB module of AM62A to communicate with another SoC on the same board, and they don't need Hot plug-in feature. In theory, VBUS needs to be connected to corresponding voltage for detection. But, from the experience of other MCU like STM32, we can set the register like NOVBUSSENS to ignore VBUS detection and the USB will work as the role defined in the SW. We would like to know if it is also viable for the AM62A? Thanks

 

Best Regards,

Xingyu Zhu

  • +1
    TI__Guru**** 168211 points

    Hi Xingyu,

    Which USB mode do the AM62Ax USB ports work on, host-only, device-only, or DRD mode?

    You could leave USB_VBUS pin unconnected (not sure if it should be float or not, that is a hardware question) if the USB port is in host-only mode. But USB_VBUS should be connected to the VBUS power source if the USB port is in device-only or DRD mode.