Patent ID: 7656447

Claim:
A camera module for performing communication using I2C. communication method, comprising: a lens; an image sensor unit, to which an electric power source voltage is applied through a power line, to convert an image transmitted from the lens into an electric signal, the image sensor unit connected to an I2C bus comprising a serial clock line and a serial data line; a first diode to interrupt overcurrent generated by electrostatic discharge and flowing from the image sensor unit to the serial clock line; a second diode to interrupt the overcurrent generated by the electrostatic discharge and flowing from the image sensor unit to the serial data line; a first switch to cut off the connection between the image sensor unit and the serial clock line when the electric power source voltage is not applied through the power line; and a second switch to cut off the connection between the image sensor unit and the serial data line when the electric power source voltage is not applied through the power line, wherein the power source voltage is supplied to the first and second switches as a control voltage which controls the on/off state of the first and second switches.