Hi all! I want to use a STM32G0B1 MCU in both USB device modes: self-powered as well as bus-powered. How does the STM32G0B1 want to detect connection of a host controller to be able to connect/disconnect the DP-pullup?

[ABöer.1]

After reading through DS, RefMan, AN4879 and loads of html/pdf this is what still remains unclear.

-- In the DS this is written: "When VBUS sensing feature is enabled, PA9 should be left at its default state (floating

input), not as alternate function." --> I cannot find this "VBUS sensing feature" anywhere in the Reference Manual.

Is it possible that there is no hardware function for automatic pullup-Enable-after-VBus-sensed? The pin function table does not show this for PA9.

-- Could it be that my STM32G0B1 has to detect a host connection via USB-C lines like CC and so a USB type-B connector cannot be used?

Thanks in advance,

Andreas

[waclawek.jan]

You can detect VBUS using any input pin, properly voltage conditioned.

JW

PS The quoted line about VBUS appears to be an errorneous copy/paste from different STM32 model with the Synopsys USB OTG module, @Imen DAHMEN​  can you please have a look at it? Thanks.

[Imen.D]

Hello @Community member​ , @Andreas Böer​ 

Thank you for pointing out this issue.

I escalated this topic internally to the document Owner to decide which implementation will be chosen finally.

I will come back to you soon with update on the actions that will be taken.

Thanks

Imen

[waclawek.jan]

Thanks, Imen.

JW