如题，求教

安装最新的驱动： 资料名称 CH341PAR.EXE 资料类型 应用资料 资料大小 185KB 资料版本 2.2 更新时间 2011-04-29

USB设备能识别，但是上位机不能对M25P32编程，测试晶振两脚电压为0.2V，万用表笔测量过程，USB设备断开连接，测量笔离开晶振，USB恢复连接，请问这样正常吗？能判断芯片是好是坏？

首先要确认的是当您设备插入后系统有没有发现新硬件，如果没有请检查您的硬件，如果发现了新硬件，请安装ch341par.exe驱动，安装成功后在设备管理器下会多出个外部设备，说明驱动安装成功，否则驱动安装失败，失败的原因可能是ch341a模式设置不对，请把原理图发送到szk@wch.cn,我们帮您看看。

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