Patent ID: 7761645

Claim:
A system comprising: a first bus; a second bus; a transceiver coupled to the first bus; and a device coupled to the first bus and the second bus; wherein the transceiver is configured to initiate a data transfer to the device by transmitting onto the first bus a first code indicative of a data transmission and further indicative of data to be transmitted not having a physical interface device (PID) code; wherein the transceiver is further configured to transmit onto the first bus, as part of the data transfer, a reserved PID code and corresponding one or more packets subsequent to transmitting the first code; and wherein the device is configured to receive the first code and the reserved PID code and corresponding one or more packets, wherein the device is further configured to qualify the first code with a function control code, and when the function control code is indicative of normal operation, transmit the reserved PID code and corresponding one or more packets onto the second bus.