Posted on July 25, 2014 at 14:16Take a look at ST's AN2867 - Application Note for Oscillator design guide. Schematics for development boards would also be a good place to look.

Posted on July 25, 2014 at 14:04''Do you have any ideas what could be wrong or suggestions how to approach this problem?'' There has been several discussion on this forum about problems with some external PHY and STM32F parts. Is the USB3300 known t...