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Kuzma30
Associate II
February 12, 2026
Solved

STM32F407 USB_OTG_HS hw recomendation

  • February 12, 2026
  • 1 reply
  • 195 views

I use STM32F407 with internal PHY

usb.png

What external elements need I for connecting USB flash to MCU?

 

Best answer by FBL

Hello @Kuzma30 

Did you refer to reference schematics from the MB997. For reliable USB operation, you should use the HSE clock source.

1 reply

FBLBest answer
ST Technical Moderator
February 17, 2026

Hello @Kuzma30 

Did you refer to reference schematics from the MB997. For reliable USB operation, you should use the HSE clock source.

To give better visibility on the answered topics, please click on "Best answer" on the reply which solved your issue or answered your question.Best regards,FBL
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