It’s also mentioned here that it’s based on Xilinx IP, so it’s very likely some sort of FPGA to accelerate matrix multiplications and convolutions usually found in neural networks (likely similar to Tensor/Matrix cores found in Nvidia Turing (or later) GPUs and AMD’s recent Instinct GPUs, or Google’s “Edge TPU” that is included in the Tensor chips of recent Pixel phones). So it’s unlikely it has any dedicated memory.