B.4.5. IDCODE (b1110)

The IDCODE instruction connects the device identification code register (or ID register) between DBGTDI and DBGTDO. The ID register is a 32-bit register that enables the manufacturer, part number, and version of a component to be read through the TAP. See Device IDentification (ID) code register for details of the ID register format.

When the IDCODE instruction is loaded into the instruction register, all the scan cells are placed in their normal (System) mode of operation:

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