To provide an electronic apparatus enabling accurately-timed transmission and reception by effectively utilizing signal lines of an interface, capable of solving a conventional problem of a complicated protocol and variations in transmission timing with regard to each data unit, in a serial communication standard such as USB and IEEE1394 that has fewer signal lines while allowing bulk data communication at high speed.

In an electronic apparatus, if it is determined that another apparatus coupled thereto satisfies a predetermined condition, highly accurate time adjustment can be realized through outputting a time entry via a data line while outputting a sync signal via a VBUS line.