The micro TLB in the TBU caches the PTW results returned by the TCU. The TBU compares the PTW results of incoming transactions with the entries in the micro TLB before performing a TCU PTW. The micro TLB is fully associative and you can configure the depth of a micro TLB based on your requirements.
Figure 2.7 shows the micro TLB cache structure.
See Additional reading for more information on the TBU configurability.