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ADS8556头几帧数据代表什么?

Other Parts Discussed in Thread: ADS8556

ADS8556串行模式下,三个通道ABC同时采样,以CPU方式读取数据时。不同的配置下每次的头三帧数据都会不一样,不同的前三帧数据似乎也对应着后面采样的结果对不对。如图为头几帧数据,这些数据在数据手册上头找不到对应说明。有什么特殊含义吗?

当改变位时钟频率时,这些数据会发生变化。并且位时钟频率越低,错误率越大。。。有谁知道吗