DDR Memory Access through GMIO - 2024.1 English

AI Engine-ML Kernel and Graph Programming Guide (UG1603)

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2024.1 English

The main data streams to and from the AI Engine-ML are the AI Engine-ML 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-ML has a low throughput and is ideal for configuration. The AI Engine-ML-GMIO directly connects to the DDR memory through the AI Engine-ML-NoC master unit (NMU).

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