MIDR_EL1

32-bitIdentification

The main implementer ID register: who made the chip and what model it is. Read-only from every level, and the first thing a program checks to work out what it is running on.

Field layout

Implementer[31:24]31:24

Variant[23:20]23:20

Architecture[19:16]19:16

PartNum[15:4]15:4

Revision[3:0]3:0

byte 3

byte 2

byte 1

byte 0

Current value hover a field to locate it

Fields

Bits	Field	Bits	Value	Description
31:24	Implementer[31:24]	8		A code assigned to the implementer by Arm. 0x41 Arm 0x42 Broadcom 0x43 Cavium 0x44 DEC 0x46 Fujitsu 0x48 HiSilicon 0x49 Infineon 0x4D Motorola 0x4E Nvidia 0x50 APM 0x51 Qualcomm 0x53 Samsung 0x56 Marvell 0x61 Apple 0x66 Faraday 0x69 Intel 0xC0 Ampere
23:20	Variant[23:20]	4	0x0	Variant number, used to distinguish stepping revisions of the same part.
19:16	Architecture[19:16]	4		Architecture version the processor implements. 0 Undefined 1 ARMv4 2 ARMv4T 3 ARMv5T 4 ARMv5TE 5 ARMv5TEJ 6 ARMv6 7 ARMv6KZ 8 ARMv6T2 9 ARMv6K 10 ARMv7 11 ARMv6-M 12 ARMv7-M 13 ARMv7E-M 14 ARMv8 15 ARMv8.1 and later
15:4	PartNum[15:4]	12	0x0 (0)	The implementer's part number for this core.
3:0	Revision[3:0]	4	0x0	Revision number of the part.

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