CLOCK SETTING METHOD, COMMUNICATION DEVICE USING THE METHOD, AND COMMUNICATION SYSTEM

摘要

A communication device comprising means for comparing first clock predominance level preset in a clock master device with a second predominance level preset in clock slave devices at predetermined intervals and switch means for switching the clock master device and clock slave devices when it is judged according to the results of the comparison that the second clock predominance level more suitable for the clock master device than the first clock predominance level is.