PL Interface Tile Capabilities - 2024.1 English

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

Document ID
Release Date
2024.1 English

The AI Engine-ML clock can run at up to 1 GHz for -1L speed grade devices, or higher, for -2 and -3 speed grade devices. The default width of a stream channel is 32 bits. Because this frequency is higher than the PL clock frequency, it is always necessary to perform a clock domain crossing to the PL region, for example, to either one-half or a quarter of the AI Engine-ML clock frequency.

For C++ HLS PL kernels, choose an appropriate target frequency depending on the complexity of the algorithm implemented. The --hls.clock option can be used in the Vitis compiler when compiling HLS C/C++ into Xilinx object (XO) files.