The RREG command reads register data from the ADC. RREG is a 16-bit command containing the command, the register address, and the number of registers to be to read. The command details are shown below:
First byte: 001a aaaa, where a aaaa is the register address
Second byte: 00h
The ADC executes the command upon completion of the data frame and the register data transmission begins on the first device word of the following data frame. The response contains an 8-bit acknowledgment byte with the register address and an 8-bit data byte with the register content. Figure 75 shows an example command response to a single register read.