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ttl模块rs232串口土豪下载升级
usb刷机板ch340t下载线
ch340USB转串口芯片贴片封装
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USB转串口芯片 CH340G/CH340C/CH340E/340T/340B/340N/340K/S/X
开发工具>>仿真器/下载器
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改进版数据线MEGA2560
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