| 摘要 |
PURPOSE:To easily change an interruption priority order by providing a storage means where priority encode data can be written and inputting plural interruption request signals as the read address to the storage means. CONSTITUTION:A priority encoder is provided with a storage means 1 in which priority encode data to discriminate the interruption request to be preferentially processed can be written. When plural interruption request signals IRQ1-IRQn are inputted, these interruption request signals IRQ1-IRQn are inputted as the read address to the storage means 1. The storage means 1 outputs priority encode data stored in this read address. When it is necessary to change the interruption precedence, priority encode data stored in the storage means 1 is changed to prescribed data. |
