Patent ID: 7676277

Claim:
A data receiving apparatus comprising: a determining unit which determines whether a clock signal and a data signal, which are received from an external apparatus, are respectively in a high state or in a low state based on a predetermined value of a standard level; and a controller which determines a data communicating state which corresponds to the high state or the low state of the clock signal and the data signal which is determined in the determining unit, wherein the predetermined value of the standard level is lower than a level of the high state and higher than a level of the low state, wherein the determining unit determines that the clock signal and the data signal are respectively in the high state if the voltage of the clock signal and the data signal are respectively higher than the predetermined value of the standard level, and determines that the clock signal and the data signal are respectively in the low state if the voltage of the clock signal and the voltage of the data signal are respectively lower than the predetermined value of the standard level.