Hi,
APB1 clock can't be enabled if HSI clock is chosen. It says that the driven clock must be 10M<=x<48M, so, without using the PLL it's impossible to get the 10MHz.
Things get worse when I try to feed the PLL from the HSI: it says that the PLL should have HSE as an input!
If I go on despite the recommendation, then I get this message:
How can I enable the APB1 clock without using an externa crystal?
What should I do if I want to choose both: not to use an external crystal and still using the USB peripheral?
For now I can disable the USB port because I'm not in a rush with it, but this isn't a solution.
May I overlooking something?
BTW, this is a custom board.
Thank you in advanced!
