In target receive mode, the first byte transmitted from the controller to the target consists of the 7-bit device address followed by a low R/W bit. The next byte transmitted by the controller is the Address Pointer register. The ADS101x-Q1 then acknowledge receipt of the Address Pointer register byte. The next two bytes are written to the address given by the register address pointer bits, P[1:0]. The ADS101x-Q1 acknowledge each byte sent. Register bytes are sent with the most significant byte first, followed by the least significant byte.