3.1 Tightly Coupled Interface Unit (TCU)

The TCU interfaces to the following:

  • ITCM: A single 64-bit Interface
  • DTCM: This is connected by 2 x 32-bit interfaces:
    • The dual 32-bit interfaces enable two simultaneous access to DTCM. Two 32-bit data can be fetched concurrently in a single cycle.
  • AHBS: TCM can be accessed by DMA through the AHB Client bus interface:
    • This enables peripherals, such as GMAC, to access the TCM memory without any CPU intervention.
Figure 3-1. Tightly Coupled Interface Unit