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# EDPIDR2, External Debug Peripheral Identification Register 2

The EDPIDR2 characteristics are:

## Purpose

Provides information to identify an external debug component.

For more information, see 'About the Peripheral identification scheme'.

## Configuration

When FEAT_DoPD is implemented, EDPIDR2 is in the Core power domain. Otherwise, EDPIDR2 is in the Debug power domain.

Implementation of this register is OPTIONAL.

This register is required for CoreSight compliance.

## Attributes

EDPIDR2 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 | REVISION | JEDEC | DES_1

#### Bits [31:8]

Reserved, RES0.

#### REVISION, bits [7:4]

Part major revision. Parts can also use this field to extend Part number to 16-bits.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

#### JEDEC, bit [3]

Indicates a JEP106 identity code is used.

Reads as 0b1.

Access to this field is RO.

#### DES_1, bits [2:0]

Designer, most significant bits of JEP106 ID code. For Arm Limited, this field is 0b011.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

## Accessing EDPIDR2

#### EDPIDR2 can be accessed through the external debug interface:

Component | Offset | Instance
--- | --- | ---
Debug | 0xFE8 | EDPIDR2

This interface is accessible as follows:

- When FEAT_DoPD is implemented and !IsCorePowered(), accesses to this register generate an error response.
- Otherwise, accesses to this register are RO.

AArch32 Registers | AArch64 Registers | AArch32 Instructions | AArch64 Instructions | Index by Encoding | External Registers | External Registers by Offset | Registers by Functional Group | Proprietary Notice

26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6

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