| 摘要 |
PURPOSE:To perform the quick interrupt processing by giving priority levels to interrupt factors of the same interrupt level if plural interrupt factors overlap in the same interrupt level. CONSTITUTION:A priority level selecting output part 31 is provided with a counter, and this counter outputs the count output; and meanwhile, priority level coincidence detecting parts 15 and 25 of input/output control (I/O control parts) A and B are provided with priority level setting parts respectively. The counter output of the priority level selecting output part 31 is supplied to priority level coincidence detecting parts of I/O control parts A and B; and if this counter output concides with the set value of one priority level setting part, the counter is stopped and the interrupt vector of the control part of this priority level setting part is outputted. Priority levels of I/O control parts A and B are freely set by set values of priority level setting parts. Thus, the quick interrupt processing is possible. |
