13.7.9 External Input Select Register

The TRCEXTINSELR characteristics are:
Purpose
Use this to set, or read, which external inputs are resources to the trace unit.
Usage constraints
Only accepts writes when the trace unit is disabled.
Configurations
The TRCIDR5.NUMEXTINSEL field controls how many input select resources are supported.
The TRCIDR5.NUMEXTIN field controls how many inputs, from a maximum of 256, are supported.
Attributes
A 32-bit RW trace register.
The following figure shows the TRCEXTINSELR bit assignments.
Figure 13-10 TRCEXTINSELR bit assignments
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The following table shows the TRCEXTINSELR bit assignments.

Table 13-12 TRCEXTINSELR bit assignments

Bits Name Function
[31:24] SEL3 A binary value that selects which external input is a resource for the trace unit. Bit[31] is reserved, RES0.
[23:16] SEL2 A binary value that selects which external input is a resource for the trace unit. Bit[23] is reserved, RES0.
[15:8] SEL1 A binary value that selects which external input is a resource for the trace unit. Bit[15] is reserved, RES0.
[7:0] SEL0 A binary value that selects which external input is a resource for the trace unit. Bit[7] is reserved, RES0.
The TRCEXTINSELR can be accessed through the internal memory-mapped interface and the external debug interface, offset 0x120.
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