The CCI-400 combines interconnect and coherency functions into a single module. It supports connectivity for up to two ACE masters, for example, Cortex-A15, and three ACE-Lite masters, for example, Mali-T604, plus optional Distributed Virtual Memory (DVM) message support on these interfaces to manage distributed Memory Management Units (MMUs), for example, MMU-400. These can communicate through the CCI-400 with up to three ACE-Lite slaves.

Figure 2.1 shows the internal architecture of the CCI-400.