Patent ID: 8443125

Claim:
A method of communication between a first device and a second device, said method comprising: forming a serial data stream in the first device, said serial data stream having first and second voltage levels for indicating a logic high and a logic low respectively; forming a serial clock in the first device, said serial clock having said first and second voltage levels for indicating a logic high and a logic low respectively, said serial data stream being synchronous with said serial clock; combining in the first device the serial data stream and the serial clock so that the combined stream has said first and second voltage levels and a third voltage level, said first level and said second level being present while the serial clock is low and when serial data is high and low respectively, said third level being present when the serial clock is high so that transitions of the serial clock are present in the combined stream; transmitting the combined stream on a line connecting the first and second devices; and receiving in the second device said combined stream and separating the serial data stream from the serial clock by detecting said first, second, and third voltages, said first voltage indicating a logic high in the serial data stream, said second voltage indicating a logic low in the serial data stream, and said third voltage indicating transitions of the serial clock.