Patent ID: 7673085

Claim:
A multi-channel communication circuit, comprising: a master device having a serial interface; a plurality of slave devices each having a serial interface; and a multiplexer (MUX), a transmitting pin and a receiving pin of the serial interface of the master device respectively connected to a first data input pin and a first data output pin of the MUX, at least one control pin of the serial interface of the master device connected to at least one selecting pin of the MUX, a ground pin of the serial interface of the master device connected a ground pin of the MUX, at least one high voltage pin of the serial interface of the master device connected to a power pin of the MUX, transmitting pins of the serial interfaces of the plurality of slave devices respectively connected to a plurality of second data input pins of the MUX, and receiving pins of the serial interfaces of the plurality of slave devices respectively connected to a plurality of second data output pins of the MUX, the master device selectively communicating with one of the slave devices via transmitting a corresponding selecting signal to the at least one selecting pin of the MUX to make the first data input pin and the first data output pin of the MUX be respectively communicated with the second data output pin and the second data input pin of the MUX connected to the selected one of the slave devices.