STM32F427 PB14 conflict with internal USB PHY

[MBurg]

Hi I am having the same problem as described in the old post down below.... is there a way to activate the link inside to see the fix? 

I am also using the external ULPI PHY, but when the USBD_Connect function executes, pin PB14 is lost. This is becasue the USBD_Connect function is enabling the internal PHY. I know there is a way to fix this but do not remember how. I needed to reinstall the whole environment so the fix was lost and now the code does not work since I need pin PB14 as a GPIO.

Here the post I am referring to:

https://community.st.com/t5/stm32-mcus-products/stm32f4xx-spi2-and-usb-hs-conflict/td-p/438246

Regards

 

Mark

[FBL]

Hi @MBurg 

It is pointing to this thread

https://community.st.com/t5/stm32-mcus-products/stm32f4-i2s2-pin-af-multiplexer-issue-s/m-p/465934

If OTG_HS_GCCFG_PWRDWN is set (transceiver power down is deactivated) the DM/DP pins are driven by USB.

OTG_HS_GCCFG_PWRDWN is necessary to be set only when using the HS instance.