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ADS1259读取寄存器数值问题

Other Parts Discussed in Thread: ADS1259

最近调试ADS1259,发现在SPI的速度降低到1Mhz的时候,就不能读到正确的数值了。看了芯片手册上在发送命令两个命令代码之间也没有说要加延时啊。我发现加入延时再把SPI的SCLK速度调到2M就能读数据。不加延时就无法读到数值,这是怎么回事啊?