| 摘要 |
<p>PURPOSE:To considerably reduce the hardware cost and the software cost of a whole system by securing time data without a time deviation at the side of respective slave devices when time data is required by means of the respective slave devices while the number of clock IC required in the system is one. CONSTITUTION:Time data together with a calling request is transmitted from a master device 2 to the respective slave devices 3a-3n at every communication by a polling system between the master device 2 and the respective slave devices 3a-3n so as to be held.</p> |
