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ADS7253: Can I set CS as low for constant to do sample as well?

Part Number: ADS7253


According to he manual, CS is the chip select signal. And now, we just use ONE ads7253, we don't need to 'select' ads. Can we just output low level signal(use other GPIOx) to CS and run sampling well? We want to use the  SPISTE(CS)  as a GPIOy for other function if CS could be constant LOW.