I have device with STM32f030K6T6. Since one moment, I am not able to start this uP without shorcircuiting nReset signal to VCC. Originally I had RC circuit on this line. When this problem had occured I modified it removing resistor (leaving capacitor connected between nReset and GND). Still doesn't work. Currently I'm running very simple program with for(;;) loop.
Main question is: what kind of setting may cause that? At some point I was using settings in ST-Link with "Program under reset", but now I change that to "normal & autodetect" but behavior is still the same.