2.7 Trace
When present on select pin counts, the trace pins can be connected to a hardware trace-enabled programmer/debugger to provide a compressed real-time instruction trace. When used for trace, the TRACE_DATA0, TRACE_DATA1, TRACE_DATA2, TRACE_DATA3 and TRACECLK pins should be dedicated for this use. The trace hardware requires a 22 Ohm series resistor between the trace pins and the external trace connector.