13.5.7 Tightly Coupled Memory

Users can use a part of the cache as Tightly Coupled Memory (TCM). The cache size is determined by the Cache Size Configuration by Software bits in the Cache Configuration register (CFG.CSIZESW). The relation between cache and TCM is as given below:

TCM size = maximum Cache size - configured Cache size.

The TCM start address can be obtained from the product memory mapping. The cache memory starts first from the address followed by the TCM memory. Size of the Way is fixed and the number of ways varies according to the available size for the cache memory. For additional information, refer to the section 8 Product Mapping.

The TCM is also accessible in its maximum size when the CMCC is disabled. The TCM does not need to be locked in order to operate.