mst方案芯片升级USB工具，内包含整个ORCAD原理图及PADS原理图及零件BOM清单，有需要的可以下载参考。 -mst program chip to upgrade USB tool, contains the entire ORCAD and PADS schematic diagram and parts BOM list of those in need can be downloaded for reference.

Board project for simple USB HASP, based on STM32F103CBT6 chip. Development environment - OrCad 9.1. Gerber files included.