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External Input Select Register

The TRCEXTINSELR characteristics are:

Purpose

Controls the selectors that choose an external input as a resource in the ETM trace unit. You can use the Resource Selectors to access these external input resources.

Usage constraints

Accepts writes only when the trace unit is disabled.

Configurations

Available in all configurations.

Attributes

See the register summary in Table 13.3.

Figure 13.21 shows the TRCEXTINSELR bit assignments.

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Table 13.22 shows the TRCEXTINSELR bit assignments.

Table 13.22. TRCEXTINSELR bit assignments
Bits Name Function
[31:29] - Reserved, res0.
[28:24] SEL3 Selects an event from the external input bus for External Input Resource 3.
[23:21] - Reserved, res0.
[20:16] SEL2 Selects an event from the external input bus for External Input Resource 2.
[15:13] - Reserved, res0.
[12:8] SEL1 Selects an event from the external input bus for External Input Resource 1.
[7:5] - Reserved, res0.
[4:0] SEL0 Selects an event from the external input bus for External Input Resource 0.

The TRCEXTINSELR can be accessed through the internal memory-mapped interface and the external debug interface, offset 0x120.

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