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Forum Post: RE: ADS1299: DRDY Always Pulled High and DOUT does not respond to read commands

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Thanks Thomas, Please change the phase on your SPI settings, the data into the device should be valid on a falling SCLK edge, not rising. See Figure 1 on page 12 - CPOL = 0, CPHA = 1 is the setting you should be using (SPI mode 2). Let us know if that resolves the issues.

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