Is it somehow possible to turn on ETM trace while STM32F4xx is running in bootROM? So far I wasn't much successful. I don't know if it's due timing (correct frequency) or that MCU uses internal HSI oscillator by default.ETM in "normal" programs is no...

I bought STLink V3SET just to have SWD/JTAG + UART on one board. However CN3 connector for UART doesn't seem to work at all, despite any configuration (1 VCP or 2 VCP) and update chosen by STLink Upgrade.I can check that UART on target STM32F3 board ...