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STM32F446 - why PB12 conflicts with USB PHY?

Question asked by pavel a on Mar 7, 2018
Latest reply on Mar 12, 2018 by Khouloud G

Why CubeMX 4.24 says that PB12 conflicts with USB_OTG_HS when external HS PHY is not is use?


The MCU is F446ZCT, its USB HS core is in FS, host only mode, Activate_SOF and Activate_VBUS unchecked.



PB12 can have two alternate functions for USB HS core - but both are related only to HS mode, correct?

So why conflict with the PHY in FS internal PHY mode?


(and, by the way, what does "Activate_VBUS" in host mode? I use a different output pin to switch VBUS to the port).



-- pavel