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ADS1256的SPI时钟如何设置

Other Parts Discussed in Thread: ADS1256

最近在使用ADS1256读四路差分压力传感器数据,ADS1256上CLK和DIN口都有波形,DOUT上也有波形,但是用硬件SPI的例程却读出来都是最大值24bit(0xffffff).

我先咨询下,这个ADS1256芯片用SPI控制,这个SPI的时钟要怎么设置,是官方例程的那个SPI波特率吧?这个频率有什么要求不?我的是stm32芯片,输出的SPI口频率应该是多大才能准确的读ADS1256数据呢?

不是很清楚,请前辈们讲讲,我在手册上看不到这个讲解。