SWO UART output is visible at the expected clock frequency when attaching a logic analyzer to the TDO pin (both on the microcontroller, and on the debug header).
The SWO clock frequency (set in both the Project Options -> TI XDS -> Communication window and the TI XDS -> SWO Configuration window) matches that set by the CPU clock and the SWO prescaler.
I have done the following to confirm that SWO trace ought to be working:
Every time a breakpoint is hit (or when single stepping), SWO trace displays two SWO packets, with values 0xAAAAAA.
I'm trying to get SWO debugging working with IAR and an XDS200 debugger. Other Parts Discussed in Thread: LAUNCHXL-CC2640R2,, CC2640