JAJSGG2C October 2018 – June 2019 ADS125H02
The SPI-compatible serial interface is used to read conversion data, configure the device registers, and control ADC operation. The CRC is used to validate error-free transmission of the input and output data flow. The serial interface consists of the following control signals: CS1, CS2, SCLK, DIN, and DOUT/DRDY. Most microcontroller SPI peripherals can operate with the ADC. The interface operates in SPI mode 1, where CPOL = 0 and CPHA = 1. In SPI mode 1, SCLK idles low and data are updated or changed on the SCLK rising edges; data are latched or read on the SCLK falling edges. Timing details of the SPI protocol are provided in Figure 1 and Figure 2.