The data output pin (DOUT) is used with SCLK to read conversion and register data from the ADS1291, ADS1292, and ADS1292R. The START pin must transition from low to high before the data output pin can generate any data. Data on DOUT are shifted out on the SCLK rising edge. DOUT goes to a high-impedance state when CS is high.
Figure 45 shows the data output protocol for the ADS1292 and ADS1292R.