STM32F7 USB_FS and USB_HS together

> 

It appears, but is not clear from the data sheets, that the STM32F7 and some STM32F4's have two separate USB controllers a FS one and a HS one

Yes this is exactly the case.

> 

can these two controllers be used simultaneously

Yes, please see the 'dual core' USB demo, in 

<CubeMX repository ver F4>/Projects/STM324x9I_EVAL/Applications/USB_Host/DualCore_Standalone

-- pa

Hello

Barnaby.Terry

Correct, there are two USB controllers andthey can beused simultaneously:

• USB 2.0 full-speed device/host/OTG controller with on-chip PHY
• USB 2.0 high-speed/full-speed device/host/OTG controller with dedicated DMA, on-chip full-speed PHY and ULPI

For more details about the USB peripherals implemented on our STM32 MCUs, please refer to application note ''

https://www.st.com/content/ccc/resource/technical/document/application_note/group0/0b/10/63/76/87/7a/47/4b/DM00296349/files/DM00296pdf/jcr:content/translations/en.DM00296pdf

At the end of the AN, we have added an FAQ sectionproviding answers to the most common questions received from our customers. One of the answered questions is:

If you have any feedback about the application note, please do not hesitate to share it

https://community.st.com/message/197638-usb-hardware-and-pcb-guidelines-application-note

Khouloud.