Trangely enough, this one works also at 168MHz, with the same Trace configuration! It's a problem of too high frequency?īefore this one, I tried to configure Trace on a STM32F407ZG, on the same board (pin-to-pin compatible) and with the same software (except for small mandatory fixes due to the different microcontroller). I tried to lower the core clock working frequency to 42MHz, and that made Trace starts working. I can't make ETM Trace (sync mode, 4-bit data) works properly on a STM32F427ZG with a core clock of 168MHz. I'm using ULINKpro and Keil uVision 5.23.0.0 as debugger.
