| 摘要 |
<p>PURPOSE:To perform power supply cutoff control which attains a proper system operation by deciding whether a power supply cutoff instruction is delivered or not in response to the relation between a switch-on reserved time point and the present time point when a power supply cutoff instruction is delivered from a program. CONSTITUTION:A program itself controls the power supply application reserved time of a data processing system 10 and then delivers a power supply cutoff instruction in principle only in case t<T is satisfied, where (t) is the present time point when a power supply cut-off instruction is delivered and T is a reserved time point for application of power supply. Then the cutoff of power supply is inhibited after the point T. Furthermore, the deliver of a power supply cutoff instruction is inhibited in the case of T<t+c, i.e., the point T is obtained within a period between the time point (t) when the conditions are satisfied for deliver of a power supply cutoff instruction and a prescribed time point (c). This system improves the reliability of hardware and also prevents the control confusion between make and break in case the make and the break are very close to each other.</p> |
