| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To temporarily actuate a D/A conversion circuit for acquiring a digital signal in acquisition of the digital signal based on D/A conversion of an input analog signal in a one-chip microcomputer with the built-in D/A conversion circuit. <P>SOLUTION: This processor is provide with an A/D converter 12 converting an input analog signal into a digital signal, a CPU 11 receiving the digital signal and controlling operation of an A/D conversion circuit 12, and an interruption request generation circuit 20 comparing the input analog signal with a comparison analog signal and generating an interruption request according to a comparison result for giving it to the CPU 11. The CPU 11 actuates the A/D conversion circuit 12 to convert the input analog signal into the digital signal when an interruption request is given from the interruption request generation circuit 20. <P>COPYRIGHT: (C)2004,JPO</p> |
