C10.17 Sequencer State Transition Control Registers 0-2

The TRCSEQEVRn characteristics are:

Purpose
Defines the sequencer transitions that progress to the next state or backwards to the previous state. The ETM trace unit implements a sequencer state machine with up to four states.
Usage constraints
  • Accepts writes only when the trace unit is disabled.
  • Returns stable data only when TRCSTATR.PMSTABLE==1.
  • Software must use this register to set the initial state of the sequencer before the sequencer is used.
Configurations
Available in all configurations.
Attributes
See C10.1 ETM register summary.
Figure C10-16 TRCSEQEVRn bit assignments
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[31:16]
Reserved, res0.
B TYPE, [15]

Selects the resource type to move backwards to this state from the next state:

0Single selected resource.
1Boolean combined resource pair.
[14:12]
Reserved, res0
B SEL, [11:8]

Selects the resource number, based on the value of B TYPE:

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

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

F TYPE, [7]

Selects the resource type to move forwards from this state to the next state:

0Single selected resource.
1Boolean combined resource pair.
[6:4]
Reserved, res0.
F SEL, [3:0]

Selects the resource number, based on the value of F TYPE:

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

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

The TRCSEQEVRn registers can be accessed through the external debug interface, offsets:

TRCSEQEVR0
0x100.
TRCSEQEVR1
0x104.
TRCSEQEVR2
0x108.
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