9.5.5.9 RREG Command

Use the RREG command to read register data. Take CS1 low to access registers within the ADC register block. Take CS2 low to access registers within the PGA register block (see the Register Map section for the register block map). Register data are read one byte at a time using the RREG command for each operation. Add the register address (rrh) to the base opcode (20h) to complete the command byte (20h + rrh). Table 24 lists the RREG command byte sequence. The ADC responds with the register data byte, most significant bit first. Data for registers addressed outside the range is 00h. Out CRC-2 is the output CRC corresponding to the received command bytes. Out CRC-1 is the output CRC corresponding to the single register data byte.