| 摘要 |
<p>PROBLEM TO BE SOLVED: To arbitrarily assign a vector number of an unused interrupt vector to an interrupt factor from an external terminal or a peripheral function circuit.SOLUTION: An interrupt controller includes: a priority determination circuit (23) for determining a priority of an interrupt request. A CPU includes: a vector address generation circuit (31) for generating a vector address corresponding to a vector number. A vector number change circuit (24) for changing a vector number outputted from the priority determination circuit (23) into a vector number corresponding to a vector address capable of being generated by the vector address generation circuit and outputting this vector address to the vector address generation circuit is provided between the priority determination circuit and the CPU. Vector numbers corresponding to interrupts which give preference to early generating a vector address over changing the vector number in the vector number change circuit, out of vector numbers outputted from the priority determination circuit bypass the vector number change circuit and are supplied to the vector address generation circuit.</p> |
