Trace port mode

The Trace port mode control specifies the way the trace port is operated. For non- ETMv3 architectures, select one of the following values:

Normal                                     This option is the default. Trace data from the ETM is written to the output pins at the processor frequency.

Multiplexed                             Use this option to reduce the number of output pins used by the trace port. Two output signals are output on the same pin by clocking the signals at double the normal rate.

De-Multiplexed                       Use this option to reduce the signal switching frequency of the trace port signals. One output signal is output on two pins, so the pins are clocked at half the normal rate.

Half-rate clocking enabled   Select this option if you want to set the ETM half-rate clocking signal. The effect of this signal is dependent on the implementation of your system.

 See the ETM control register section of the ARM Embedded Trace Macrocell Specification.

Disabled traceport                 Select this option if you want to suppress the output from the trace port. Use this to control trace output if your hardware has two or more ETMs sharing a single trace port.