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ID Register 2

The TRCIDR2 characteristics are:


Returns the maximum size of the following parameters in the trace unit:

  • Cycle counter.

  • Data value.

  • Data address.

  • VMID.

  • Context ID.

  • Instruction address.

Usage constraints

There are no usage constraints.


Available in all configurations.


See the register summary in Table 13.3.

Figure 13.35 shows the TRCIDR2 bit assignments.

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Table 13.36 shows the TRCIDR2 bit assignments.

Table 13.36. TRCIDR2 bit assignments
Bits Name Function
[31:29] -

Reserved, res0.

[28:25] CCSIZE

Size of the cycle counter in bits minus 12:


The cycle counter is 12 bits in length.

[24:20] DVSIZE

Data value size in bytes:


Data value tracing is not implemented.

[19:15] DASIZE

Data address size in bytes:


Data address tracing is not implemented.

[14:10] VMIDSIZE

Virtual Machine ID size:


Virtual Machine ID is 8 bits.


Context ID size in bytes:


Maximum of 32-bit Context ID size.

[4:0] IASIZE

Instruction address size in bytes:


Maximum of 64-bit address size.

The TRCIDR2 can be accessed through the internal memory-mapped interface and the external debug interface, offset 0x1E8.

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