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ADS8584S: 使用串行通信时,DOUT数据线异常,连续输出相同数据

Part Number: ADS8584S

使用芯片ADS8585芯片时,出现下面的异常输出波形。

ADC的输入通道使用信号发生器输入波形,SPI的输出数据通道为连续的数据10101010...,蓝色波形为FRSTDATA,输出10001000.

CLK频率为20M,500K由MCU采集一次数据。