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M系列上电后PORT没有初始化前，IO口处于什么状态？ 是SWD_CLK下拉，RESET_b、SWD_IO上拉，其他都是输入高阻态吗？
M系列用于SW/JTAG调试接口的默认状态如下表，其他功能PIN脚默认均为模拟功能，输入高阻状态
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帮助没办法联网的电脑使用YCT
帮助改进和优化YT CONFIG TOOL，有机会抽取YTM32B1ME0 EVB哦...
