Is there any detailed document for programming with the "5.0 TOPS NPU”?

I am very interested in the AI programming on VIM3 with the "5.0 TOPS NPU” in A311D,
but could not find detailed document on both Amlogic’s and Khadas’s website, does any one
know if there exists any manual or guide that describe the hardware of such NPU and how
to develop with it in details?

I also wanted documentation on the npu. I found a link in one of the discussions but the page it went to didn’t let me leave my details to get the documentation. Is the 5TOPS NPU similar to the Google Coral 4TOPS NPU add on board. They both do int8 calculations.