Can K21 USBDCD use for detect VBUS status?

[jimyang]

Hi,

Anybody tell me if K21 USBDCD can use for detect VBUS status? And how to do?

Thanks!

Jim

[jorge_a_vazquez · Accepted solution]

Hi Jim Yang

We recommend to use a GPIO pin as VBUS detection, which also could wake up the chip from all low power mode (includes LLS mode or VLLSx mode (using LLWU module with external pin)).

The VBUS connects to VREGIN and a GPIO pin doesn't cause conflict. I think customer can fly a wise to connect VBUS with related GPIO pin.

Hope this information helps you
Have a great day,
Jorge Alcala

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