System, methods and apparatus offer improved performance for a communication interface that provides for the coexistence of devices on a serial bus. A bus master coupled to a serial bus configures a transceiver for communicating on the serial bus when the serial bus is operated in a high data rate mode of operation on the serial bus, and while the serial bus is operated in the high data rate mode of operation, transmits a first command addressed to an invalid slave device address, and transmits a second command addressed to a valid slave device address. The second command may be defined for transmission when the serial bus is operated in a low data rate mode of operation.
