The read/write Claim Tag Clear Register is used to read the claim status on debug resources. Figure 12.24 shows the bit arrangement of the Claim Tag Clear Register.
Table 12.39 shows how the bit values correspond with the Claim Tag Clear Register functions.
Reserved. RAZ, SBZP.
Indicates the claim tag status. Writing 1 to a specific bit clears the corresponding claim tag to 0. Reading this register returns the current claim tag value. For example, if you write 1 to bit  of this register, it is read as 0. The reset value is 0.