EDPIDR1, External Debug Peripheral Identification Register 1
The EDPIDR1 characteristics are:
Provides information to identify an external debug component.
For more information, see 'About the Peripheral identification scheme'.
Implementation of this register is OPTIONAL.
If FEAT_DoPD is implemented, this register is in the Core power domain. If FEAT_DoPD is not implemented, this register is in the Debug power domain.
This register is required for CoreSight compliance.
EDPIDR1 is a 32-bit register.
The EDPIDR1 bit assignments are:
DES_0, bits [7:4]
Designer, least significant nibble of JEP106 ID code. For Arm Limited, this field is 0b1011.
PART_1, bits [3:0]
Part number, most significant nibble.
Accessing the EDPIDR1
EDPIDR1 can be accessed through the external debug interface:
This interface is accessible as follows:
- When FEAT_DoPD is not implemented or IsCorePowered() accesses to this register are RO.
- Otherwise accesses to this register generate an error response.