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ARM920T PROCESSOR PROGRAMMER'S MODEL
2-7
REGISTER 0: ID CODE REGISTER
This is a read-only register which returns a 32-bit device ID code.
The ID code register is accessed by reading CP15 register 0 with the opcode_2 field set to any value other than 1
(the CRm field should be zero when reading). For example:
MRC p15,0,Rd,c0,c0,0; returns ID register
The contents of the ID code are shown in Table 2-5.
Table 2-5. Register 0: ID Code
Register bits Function Value
31:24 Implementor 0x41
23:20 Specification revision 0x1
19:16 Architecture version (4T) 0x2
15:4 Part number 0x920
3:0 Layout revision 0x0