The HI-6010 is a CMOS integrated circuit designed to interface the avionics data bus standard ARINC 429 to an 8 bit port. It contains one receiver and one transmitter. They operate independently except for the self test option and the parity option. The receiver demands that the incoming data meet the standard protocol and the transmitter outputs a standard protocol stream. The HI-6010 provides flexible options for interfacing to the user system. The controlling processor can operate both the receiver and transmitter either by using hard wired flags and gates at the pins or by using software reads and writes of the Status Register and Control Register or a combination thereof.