Patent ID: 7016993

Claim:
An I2C MUX with an anti-lock device, being connected to a system having a central process unit (CPU) and an I2C main control unit, and a plurality of I2C elements, comprising: an I2C multiplexer (I2C MUX), used to choose one of said I2C elements to connect with said I2C main control unit; and a reset unit, connected to said CPU and said I2C MUX, said I2C main control unit emitting a signal to said CPU, and then said CPU sending an open-circuited signal to said reset unit, said reset unit sending a reset signal to said I2C MUX to reconnect said I2C MUX with one of said I2C elements and said I2C main control unit when the connection among said chosen I2C element, said I2C MUX and said I2C main control unit is broken; wherein said reset circuit comprises: a switch unit, being connected with a power source and said I2C MUX, used to switch the connection between said power source and said I2C MUX; and an amplifier unit, an input end thereof being connected to said CPU, an output end thereof being connected to an triggering end of said switch unit, used to receive and amplify said open-circuited signal transmitted by said CPU to trigger said switch unit to be “ON”, and further to cause said power source to send out said reset signal.