| 摘要 |
<p>PURPOSE:To measure the lapse of minute time which can not be measured by a conventional system by providing a means to measure the lapse of smaller than the lapse of the minimal time which can be measured by a timer device, without depending on the information processing speed of an information unit. CONSTITUTION:When lapse of the minute time to be measured is defined as A seconds, the timer device 14 is set so as to generate interruption after N-fold lapse of time of NA seconds. Until generating the interruption after the NA seconds, an instruction execution routine 22 of a monitoring program in the figure is repeatedly executed and the number of times for executing the routine is counted. When the device 14 detects the lapse of time of the NA seconds and an interruption signal 13 is generated in an arithmetic unit 11, the device 11 stops executing the routine 22 and moves to the execution of an interruption program 15. The program 15 divides a number of times K of executing the routine 22 during the NA seconds with N and a value C is stored into a memory area 17. Afterwards, when it is necessary at an arbitrary time point to measure the lapse of time of the A seconds, the time of the A seconds can be counted by executing the monitoring program in the figure.</p> |
