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13.8.22. Counter Control Register 1

The TRCCNTCTLR1 characteristics are:

Purpose

Controls the counter.

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 13.24 shows the TRCCNTCTLR1 bit assignments.

Figure 13.24. TRCCNTCTLR1 bit assignments

Figure 13.24. TRCCNTCTLR1 bit assignments

Table 13.25 shows the TRCCNTCTLR1 bit assignments.

Table 13.25. TRCCNTCTLR1 bit assignments
BitsNameFunction
[31:18]-Reserved, res0.
[17]CNTCHAIN

Defines whether the counter decrements when the counter reloads. This enables two counters to be used in combination to provide a larger counter:

0

The counter operates independently from the counter. The counter only decrements based on CNTTYPE and CNTSEL.

1

The counter decrements when the counter reloads. The counter also decrements when the resource selected by CNTTYPE and CNTSEL is active.

[16]RLDSELF

Defines whether the counter reloads when it reaches zero:

0

The counter does not reload when it reaches zero. The counter only reloads based on RLDTYPE and RLDSEL.

1

The counter reloads when it is zero and the resource selected by CNTTYPE and CNTSEL is also active. The counter also reloads based on RLDTYPE and RLDSEL.

[15]RLDTYPE

Selects the resource type for the reload:

0

Single selected resource.

1

Boolean combined resource pair.

[14:12]-Reserved, res0.
[11:8]RLDSEL

Selects the resource number, based on the value of RLDTYPE:

When RLDTYPE is 0, selects a single selected resource from 0-15 defined by bits[3:0].

When RLDTYPE is 1, selects a Boolean combined resource pair from 0-7 defined by bits[2:0].

[7]CNTTYPE

Selects the resource type for the counter:

0

Single selected resource.

1

Boolean combined resource pair.

[6:4]-Reserved, res0.
[3:0]CNTSEL

Selects the resource number, based on the value of CNTTYPE:

When CNTTYPE is 0, selects a single selected resource from 0-15 defined by bits[3:0].

When CNTTYPE is 1, selects a Boolean combined resource pair from 0-7 defined by bits[2:0].


The TRCCNTCTLR1 can be accessed through the external debug interface, offset 0x154.

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