According to ST AN2867 Oscillator design guide for STM32, the oscillator circuit requires a Rext resistor
There are minimal boards with stm32f030f4p6 on ebay, aliexpress…
It looks that rext is missing on the schematics. It only have a crystal and 2 capacitors
Do you think the board can run on HSE anyway ?
Here is the schematics
http://www.uctronics.com/download/U3808-1.jpg
Thanks
Best Answer
It will run without \$R_{ext}\$, but the clock will be noisier (because you don't have a low pass filter anymore), which may or may not effect the application. You may experience anything from more jitter on the clock which will affect timing or worst case an occasional upset.
From the app note (app notes are good to read)