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ADS1299的片选CS信号是否可以接地

Other Parts Discussed in Thread: ADS1299

如题,最近在用ADS1299,我的主机只接了一个AD,我看手册里没有说SPI通信开始前需要一个CS的高到低的操作,所以想问一下,是否可以全程接地,或者是不能接地,需要接主机IO的一个低电平,希望有经验的大佬们帮忙解答一些,感激