There are two methods to read conversion data: read data direct and read data by command.

Read data direct does not require a command, instead after DRDY falls low, simply apply SCLK to read the data. Figure 7-24 shows the read data direct operation. When DRDY falls low, take CS low to start the read operation. CS low causes DOUT to transition from tri-state mode to the output of the data MSB. Data are read on the rising edge of SCLK and updated on the falling edge of SCLK. DRDY returns high on the first falling edge of SCLK. DOUT is low after 32 data bits are read. To read the same data again before new data are available, use the RDATA command.

Keep DIN low when reading conversion data. If the RDATA (read conversion data) or RREG (read register data) command is sent, output data are interrupted in response to the command. If DRDY falls low during the read operation, the new data are lost unless a minimum of three bytes of the old data are read.

Figure 7-24 Read Data Direct