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Arm Cortex-A55 Core Technical Reference Manual : EDPIDR4, External Debug Peripheral Identification Register 4

EDPIDR4, External Debug Peripheral Identification Register 4

The EDPIDR4 provides information to identify an external debug component.

Bit field descriptions

Figure D3-14 EDPIDR4 bit assignments


RES0, [31:8]
res0Reserved.
SIZE, [7:4]
0x0Size of the component. Log2 the number of 4KB pages from the start of the component to the end of the component ID registers.
DES_2, [3:0]
0x4Arm Limited This is the least significant nibble JEP106 continuation code.

Bit fields and details not provided in this description are architecturally defined. See the Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile.

The EDPIDR4 can be accessed through the external debug interface, offset 0xFD0.

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