3.16.35. CoreSight Trace ID Register, ETMTRACEIDR

The ETMTRACEIDR characteristics are:


Defines the 7-bit Trace ID, for output to the trace bus.

Usage constraints

There are no usage constraints.


Available in all PTM implementations.


See the register summary in Table 3.16.

The reset value of this register is zero.

Figure 3.41 shows the ETMTRACEIDR bit assignments.

Figure 3.41. ETMTRACEIDR bit assignments

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Table 3.50 shows the ETMTRACEIDR bit assignments.

Table 3.50. ETMTRACEIDR bit assignments




Trace ID to output onto the trace bus.

This register is used in systems where multiple trace sources are present and tracing simultaneously. For example, where a PTM outputs trace onto the AMBA 3 Advanced Trace Bus (ATB), a unique ID is required for each trace source so that the trace can be uniquely identified as coming from a particular trace source. For more information about the AMBA 3 ATB, see the CoreSight Architecture Specification.

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