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THS1206控制字写入问题

Other Parts Discussed in Thread: THS1206

您好,

在向THS1206写控制字时,要写四次。

开始按照写使能,然后连续写四次数据,结果控制字没写进去;

写使能,写一次数据后关闭写使能,第二次写时再打开写使能,这样依次写四次,控制字才写入。

请问为什么呢?不知道写使能是下降沿有效,还是低电平有效?

谢谢!