What is the difference in cache memory and tightly coupled memory
<p>Due to being embedded inside the CPU The TCM has a
Harvard-architecture, so there is an ITCM (instruction TCM)
and a DTCM (data TCM). The DTCM can not contain any
instructions, but the ITCM can actually contain data.
The size of DTCM or ITCM is minimum 4KiB so the typical
minimum configuration is 4KiB ITCM and 4KiB DTCM.</p>

<p>It looks like tcm have same purpose as cache memory.</p>

<p>No. They didn't used the word cache in explanation</p>