Multi network radio with shared transmitter

1. A transceiver to simultaneously operate on a first data network and a second data network, the transceiver comprising:

a first receiver configured to receive data on the first network;

a second receiver configured to receive data on the second network at the same time that the first receiver is receiving data on the first network;

a shared transmitter that is switchable to transmit data on either the first network or on the second network; and

a controller configured to control the shared transmitter so that the shared transmitter automatically transmits data on the first network when data is available for transmission on the first network and on the second network when data is available for transmission on the second network.

2. The transceiver of claim 1 wherein the controller is further configured to simultaneously monitor the data received on the first network by the first receiver and on the second network by the second receiver to thereby identify a time in which the first network and the second network are both inactive.

3. The transceiver of claim 2 wherein the controller is further configured to automatically control the transmitter so that data is transmitted on either the first network or the second network only when the first network and the second network are both inactive.

4. The transceiver of claim 3 wherein the first network is more fault-tolerant than the second network, and wherein the controller is further configured to transmit data on the first network and on the second network when the second network is inactive.

5. The transceiver of claim 1 wherein the controller is further configured to simultaneously monitor the data received on the first network by the first receiver and on the second network by the second receiver.

6. The transceiver of claim 1 wherein controller is further configured to provide a control signal to a switch that couples an antenna to the shared transmitter during a transmit mode and that couples the antenna to the first and second receivers during a receive mode.

7. The transceiver of claim 1 wherein the first receiver, second receiver, shared transmitter and controller are formed on a common semiconducting substrate.

8. The transceiver of claim 1 wherein the first and second networks are separate personal area networks (PANs).

9. The transceiver of claim 1 wherein the first receiver, second receiver, shared transmitter and controller are housed in a common package.

10. A method executable by a digital controller to process simultaneous communications on a first wireless network and on a second wireless network, the method comprising:

monitoring data received from the first wireless network via a first receiver;

simultaneously monitoring data received from the second wireless network via a second receiver that is distinct from the first receiver;

before transmitting data on either the first wireless network or the second wireless network, determining from the monitored data that the first wireless network and the second wireless network are both inactive; and

controlling a transmitter that is shared between the first wireless network and the second wireless network to thereby transmit data on either the first wireless network or the second wireless network only when the first wireless network and the second wireless network are both inactive.

11. The method of claim 10 wherein the controlling comprises switchably coupling an antenna to at least one of the first and second receivers in a first mode for receiving signals on the first and second wireless networks, respectively, or to the shared transmitter in a second mode for transmission on either the first wireless network or the second wireless network.

12. The method of claim 11 wherein the antenna is coupled to both the first receiver and to the second receiver in the first mode to simultaneously receive data on both the first wireless network and on the second wireless network.

13. The method of claim 10 further comprising disabling both the first receiver and the second receiver when the shared transmitter is transmitting on either the first wireless network or the second wireless network.

14. A computing system that communicates on a first wireless network and a second wireless network, the system comprising:

an input interface configured to receive input data;

a controller configured to control processing of the received input data; and

a multi-network transceiver that communicates with the controller, wherein the multi-network transceiver comprises a first receiver configured to receive data on the first wireless network, a second receiver configured to receive data on the second wireless network, and a shared transmitter that switchably transmits on either of the first wireless network and the second wireless network.

15. The computing system of claim 14 wherein the shared transmitter is configured to transmit only when both the first wireless network and the second wireless network are otherwise inactive.

16. The computing system of claim 14 wherein the controller and the multi-network transceiver are formed on a common semiconducting substrate.

17. The computing system of claim 14 wherein the controller, the multi-network transceiver and a display interface are formed on the common semiconducting substrate.

18. The computing system of claim 14 wherein the first network and the second network are both ZIGBEE personal area networks.

19. The computing system of claim 14 wherein the computing system is a television receiver, the input interface is a television receiver interface, and the display interface is an interface to a television.

20. The computing system of claim 19 wherein the first wireless network is a ZIGBEE RF4CE personal area network that supports communications between the television receiver and a wireless remote control, and wherein the second wireless network is a ZIGBEE Home Automation personal area network that supports communications between the television receiver and a plurality of home appliances.