The programming using 24-bit shift registers. The shift register consists of a R/W bit (MSB), followed by a 7-bit address field and a 16-bit data field. For the R/W (bit 23), 1 is read and 0 is write. The address field ADDRESS (bits 22:16) is used to decode the internal register address. The remaining 16 bits form the data field DATA (bits 15:0). While CSB is low, serial data is clocked into the shift register upon the rising edge of clock (data is programmed MSB first). When CSB goes high, data is transferred from the data field into the selected register bank.