8.7.10. Scan chain 15

This scan chain allows access to the System Control Coprocessor registers. Scan chain 15 is selected via the SCAN_N Tap controller instruction. This scan chain is 33 bits long—32 bits for the data/instruction value plus an additional bit which identifies the value as instruction (1) or data (0). This scan chain should only be used during INTEST. The order of the scan chain from TDI to TDO is:

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