JAJSLQ5C April 2021 – September 2022 ADS127L11
PRODUCTION DATA
SDO/DRDY is a dual-function output pin that can be programmed to automatically change modes from data ready, when not reading data, to data output mode, when reading data. This pin can replace the function of the DRDY pin to conserve the number of SPI I/O lines. When programmed to the dual-function mode (SDO_MODE bit = 1b) and when CS is low, SDO/DRDY mirrors DRDY until the first rising edge of SCLK, at which time the pin changes mode to provide data output. When the data read operation is complete (24th falling edge of SCLK, or 40th edge if the CRC and STATUS header bytes are included), the pin reverts back to mirroring DRDY. Figure 8-35 illustrates the operation of SDO/DRDY.