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Oject : problem with the STM32F401 clock using the USB OTG function

Romain Delamea

Hello.

I've got a problem with the STM32F401 code generator. I want to use some interfaces, especially the USB OTG.

When other interfaces are selected (GPIOs, SPI, UARTS...) no problem occurs, but when I try to disable the USB OTG interface, the clock tab get a red cross and this error message appears :

"Cannot found a solution for some constraint"

Screenshots : http://hpics.li/a034794

And the HSI of PLL Source Mux is red surrounded. I can't change the PLL Source on the mux, and constants which are availabe to change don't give a good result.

What can I do for resolve this problem ? I need your help :)

Thank's a lot

Romain Delaméa
E,RE,C,A France