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STM32F746NG USB Host (HS) embedded PHY and VBUS.

Question asked by Peter Morrow on May 2, 2018
Latest reply on May 3, 2018 by Peter Morrow



I'm looking at trying to implement a USB host (MSC) driver using the high speed core on the STM32F746NG MCU, we do not have an external PHY so are using the embedded PHY.  How does one achieve the 5v required for VBUS to the attached device (USB stick) in this situation?  It looks like the FS core has an internal charge pump which can be used to step the 3v3 IO up to 5v, but I can't see anything like this for HS with the embedded PHY.