Posted on May 18, 2018 at 13:43In my application, an internal POR / PDR is enough.The NRST pin is internally pulled 40k, so an external resistor is not needed in most cases. I have connected 0.1uF to ground (error in the diagram above).I would highl...

Posted on May 17, 2018 at 18:23Hi, did you solve the problem?I have an identical problem but with STM32F401RBT6, on nucleo all works, on my PCB fault as above. Errors are sometimes different(INVSTATE, PGSERR, PRECISERR, BFARVALID, BFAR, MMFAR, PGSER...