| 摘要 |
PURPOSE: A device for checking communication load in a parallel data communication system is provided to facilitate process related to a load factor of a CPU by performing calculation of the load factor and determination and report of overload through a hardware. CONSTITUTION: A check device of communication load performs calculation of a load factor and time measurement for occupying a parallel data line using a clock counter counting a number of communication clocks and a data counter counting a number of total clocks of a data packet. If a timer generates a time out signal, the check device stores and reports the load factor after dividing a value of data counter into a value of clock counter to calculate the load factor and compares the load factor with a predetermined critical value. If the load factor is larger than the critical value, an inner flag for displaying the overload state is set up and an overload interrupt is generated.
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