Hello everyone, hope you are doing okay.
In STM32F103C8's datasheet, Rev 17 page 33, it says:
" PC13, PC14 and PC15 are supplied through the power switch. Since the switch only sinks a limited amount of current (3 mA), the use of GPIOs PC13 to PC15 in output mode is limited: the speed should not exceed 2 MHz with a maximum load of 30 pF and these IOs must not be used as a current source (e.g. to drive an LED). "
But, as far as i know, in Blue Pill's design PC13 is driving a LED. How come? I am wondering.
Thanks! Be safe.