NON-REPLY MONITOR CIRCUIT IN INFRARED RAY COMMUNICATION, ITS MONITORING METHOD AND RECORDING MEDIUM STORING ITS CONTROL PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a non-reply monitor method in infrared ray communication where communication processing is smoothly conducted and the transfer efficiency is enhanced without incurring abortion of frames or interruption of an infrared ray link. SOLUTION: An EOF monitor timer 14d is provided to detect an identifier denoting an end of frame in the case that the identifier denoting the end of frame cannot be received or it is affected by other infrared ray. Operation of the EOF timer is started upon reception of an identifier denoting a head of frame and terminated upon reception of the identifier denoting an end of frame. Meanwhile, monitoring of the time-out of the EOF timer 14d and reception processing of signals sent from a slave station are conducted.