Hi,
What I tried: 1. Reboot the board and start tracing immediately after the reboot. -> I get a trace, but no async 2. cs_trace_disable immediately before cs_trace_enable -> Now I get no trace anymore 3. cs_trace_disable before the configuration -> I get a trace, but no async 4. When I print the ETM Config before the configuration, ETMCR is set to 0x460, so the Programming Bit is set. Also immeditately before enabling it is 0x460. Directly after enabling becomes 0x860, so the ProgBit is cleared and ETMEN is set. So this behaves as expected.
Regards Finn