Posted on October 10, 2017 at 06:02English newbie, sorry.
MCU:STM32F765IITx LQFP176
tool:
STM32CubeMX
Above by Pinout.
If you want to enable external clock.
High Speed Clock (HSE) BYPASS the Clock Source.
And not only for the input pin, Output pin also do not enable on the Clock Configuration Unable to set the clock, why not.
Poor English I'm sorry.
