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TRCSEQSTR: Trace Sequencer State Register

Purpose

Use this to set, or read, the Sequencer state.

Configuration

External register TRCSEQSTR bits [31:0] are architecturally mapped to AArch64 System register TRCSEQSTR[31:0].

This register is present only when FEAT_ETE is implemented, FEAT_TRC_EXT is implemented and TRCIDR5.NUMSEQSTATE != 0b000. Otherwise, direct accesses to TRCSEQSTR are RES0.

Attributes

TRCSEQSTR is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
RES0STATE

Bits [31:2]

Reserved, RES0.

STATE, bits [1:0]

Set or returns the state of the Sequencer.

STATEMeaning
0b00

State 0.

0b01

State 1.

0b10

State 2.

0b11

State 3.

The reset behavior of this field is:

Accessing TRCSEQSTR

Must be programmed if TRCRSCTLR<a>.GROUP == 0b0010 and TRCRSCTLR<a>.SEQUENCER != 0b0000.

Writes are CONSTRAINED UNPREDICTABLE if the trace unit is not in the Idle state.

Reads from this register might return an UNKNOWN value if the trace unit is not in either of the Idle or Stable states.

TRCSEQSTR can be accessed through the external debug interface:

ComponentOffsetInstance
ETE0x11CTRCSEQSTR

This interface is accessible as follows: