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ERRPIDR3, Peripheral Identification Register 3

The ERRPIDR3 characteristics are:

Purpose

Provides discovery information about the component.

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

Configuration

Implementation of this register is OPTIONAL.

Attributes

ERRPIDR3 is a 32-bit register.

Field descriptions

The ERRPIDR3 bit assignments are:

When the component uses a 12-bit part number:
313029282726252423222120191817161514131211109876543210
RES0REVANDCMOD

Bits [31:8]

Reserved, RES0.

REVAND, bits [7:4]

IMPLEMENTATION DEFINED.

Component minor revision. ERRPIDR2.REVISION and ERRPIDR3.REVAND together form the revision number of the component, with ERRPIDR2.REVISION being the most significant part and ERRPIDR3.REVAND the least significant part. When a component is changed, ERRPIDR2.REVISION or ERRPIDR3.REVAND must be increased to ensure that software can differentiate the different revisions of the component. If ERRPIDR2.REVISION is increased then ERRPIDR3.REVAND should be set to 0b0000.

CMOD, bits [3:0]

IMPLEMENTATION DEFINED.

Customer Modified.

Indicates the component has been modified.

A value of 0b0000 means the component is not modified from the original design.

Any other value means the component has been modified in an IMPLEMENTATION DEFINED way.

For any two components with the same Unique Component Identifier:

  • If the value of the CMOD fields of both components equals zero, the components are identical.
  • If the CMOD fields of both components have the same non-zero value, it does not necessarily mean that they have the same modifications.
  • If the value of the CMOD field of either of the two components is non-zero, they might not be identical, even though they have the same Unique Component Identifier.

When the component uses a 16-bit part number:
313029282726252423222120191817161514131211109876543210
RES0REVISIONCMOD

Bits [31:8]

Reserved, RES0.

REVISION, bits [7:4]

IMPLEMENTATION DEFINED.

Component revision. When a component is changed, ERRPIDR3.REVISION must be increased to ensure that software can differentiate the different revisions of the component.

CMOD, bits [3:0]

IMPLEMENTATION DEFINED.

Customer Modified.

Indicates the component has been modified.

A value of 0b0000 means the component is not modified from the original design.

Any other value means the component has been modified in an IMPLEMENTATION DEFINED way.

For any two components with the same Unique Component Identifier:

  • If the value of the CMOD fields of both components equals zero, the components are identical.
  • If the CMOD fields of both components have the same non-zero value, it does not necessarily mean that they have the same modifications.
  • If the value of the CMOD field of either of the two components is non-zero, they might not be identical, even though they have the same Unique Component Identifier.

Accessing the ERRPIDR3

ERRPIDR3 can be accessed through the memory-mapped interfaces:

ComponentOffset
RAS0xFEC

Accesses on this interface are RO.