Are there any MPUs / MCUs with integrated AI hardware accellerator especially for CNNs? If so, which device has the lowest power demand?

[Roman LUDIN]

Yes, the STM32N6 has been announced in the roadmap for 2024. This MCU will feature hardware acceleration for neural networks (NPU: Neural Processing Unit), which will dramatically improve performance of NN on MCU while minimizing cost and power consumption.