B.5.2. Device IDentification (ID) code register

Contact your supplier for the correct device identification code.


Reads the 32-bit device identification code. No programmable supplementary identification code is provided.


32 bits. The format of the register is as shown in Figure B.3.

Figure B.3. ID code register format

Operating mode

When the IDCODE instruction is current, the ID register is selected as the serial path between TDI and TDO. There is no parallel output from the ID register.

The 32-bit device identification code is loaded into the ID register from its parallel inputs during the CAPTURE-DR state.

The least significant bit of the register is scanned out first.

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