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TRBCIDR3

TRBCIDR3, Component Identification Register 3

The TRBCIDR3 characteristics are:

Purpose

Provides discovery information about the component.

For additional information, see the CoreSight Architecture Specification.

Configuration

TRBCIDR3 is in the Core power domain.

This register is present only when FEAT_TRBE_EXT is implemented. Otherwise, direct accesses to TRBCIDR3 are RES0.

Attributes

TRBCIDR3 is a 32-bit register.

Field descriptions

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
RES0																								PRMBL_3

Bits [31:8]

Reserved, RES0.

PRMBL_3, bits [7:0]

Component identification preamble, segment 3.

Reads as 0xB1.

Access to this field is RO.

Accessing TRBCIDR3

TRBCIDR3 can be accessed through the external debug interface:

Component	Offset	Instance
TRBE	0xFFC	TRBCIDR3

Accessible as follows:

When DoubleLockStatus() or !IsCorePowered(), accesses to this register generate an error response.
Otherwise, accesses to this register are RO.

2026-03-12 12:23:09, 2025-09_rel_asl1