Hello @chenyuansen
I hope you are doing very well.
The Ethos-U65 NPU is integrated with NXP i.MX 93 processor and works in concert with the Cortex-M core and on-chip SRAM of the SoC.


You can find all of these information in the i.MX Machine Learning User's Guide chapter 6.2.
There is explained how Ethos-U works.
Best regards,
Salas.