DDR Memory Access through GMIO - 2023.2 English

AI Engine Kernel and Graph Programming Guide (UG1079)

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2023.2 English

The main data streams to and from the AI Engine are the AI Engine to PL streaming interface and GMIO, which is used to make external memory-mapped connections to or from the global memory. The interface between the PS and AI Engine has a low throughput and is ideal for configuration. The AI Engine-GMIO directly connects to the DDR memory through the AI Engine-NoC master unit (NMU).

The bandwidth of AI Engine GMIO is affected by the number of NMUs and DDR memory controllers used in the platform.