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A.6. Miscellaneous signals

Table A.7 shows the miscellaneous signals.

Table A.7. Miscellaneous signals
Signal nameTypeSource/destinationDescription
PROCSEL[2:0]OutputTrace multiplexor, if present

Where an ETM is shared between multiple processors, this signal controls the multiplexor.

The value is driven from bits[2:0] of the Processor Select Control Register.

NUMPROC[2:0]InputTie off

Where an ETM is shared between multiple processors, this signal specifies the number of processors the ETM can trace. It must be tied to the number of processors sharing the ETM minus 1.

These signals determine the value of bits[30:28] in the ID Register 3.

NIDENInputSystem

Non-invasive debug enable.

When HIGH (1), indicates that non-invasive debug is enabled.

ETMACTIVEOutputProcessorTrace is being output.
ETMEVENT[63:0]InputPMU and CTIExternal input resources.
ETMEXTOUT[3:0]OutputCTIExternal outputs.
SYSSTALLInputTie offSystem supports stalling of the processor by the ETM.
ETMPWRUPREQOutputSystem power controlRequest to maintain power to ETM.
TSSIZE InputTie off

When HIGH (1), timestamp is 64 bit. When LOW (0), timestamp is 48 bit.

TSVALUE[63:0]InputCoreSight systemTimestamp value.
CLUSTERID[3:0]InputSystemValue read in the Cluster ID field, bits[11:8], of the Cortex-R7 Multiprocessor Affinity Register (MPIDR).
CPUIDInputSystemValue read in the CPU ID field, bit[0], of the MPIDR in the connected processor.

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