The system on chip (SoC) communication is mainly based on three interconnect protocols: SRI, FPI, and AXI that used for the LLI interconnect.

The Flexible peripheral interconnect (FPI) is multi-master interconnect, 32-bit data width, based on FPI interconnect protocol. The FPI connects the high speed peripherals, such as the TC1.8 CPUs and DMA modules to the medium and low bandwidth functional blocks.