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EDCIDR3, External Debug Component Identification Register 3

The EDCIDR3 characteristics are:

Purpose

Provides information to identify an external debug component.

For more information, see 'About the Component Identification scheme'.

Configuration

Implementation of this register is OPTIONAL.

If ARMv8.3-DoPD is implemented, this register is in the Core power domain. If ARMv8.3-DoPD is not implemented, this register is in the Debug power domain.

This register is required for CoreSight compliance.

Attributes

EDCIDR3 is a 32-bit register.

Field descriptions

The EDCIDR3 bit assignments are:

313029282726252423222120191817161514131211109876543210
RES0PRMBL_3

Bits [31:8]

Reserved, RES0.

PRMBL_3, bits [7:0]

Preamble.

Reads as 0xB1.

Accessing the EDCIDR3

EDCIDR3 can be accessed through the external debug interface:

ComponentOffsetInstance
Debug0xFFCEDCIDR3

This interface is accessible as follows:

  • When ARMv8.3-DoPD is not implemented or IsCorePowered() accesses to this register are RO.
  • Otherwise accesses to this register generate an error response.