Tone output device and integrated circuit for tone output

摘要

In a tone output device 100 , an oscillator 102 outputs a clock 141 that is emitted by a crystal resonator. A multiplication circuit 103 outputs a clock 142 that is generated by multiplying the clock 141 . A timing control circuit 104 outputs a timing signal 150 generated based on the clock 142 for operations of a CPU 105 . The CPU 105 operates in sync with the timing signal 150 . The DA converter 115 operates in sync with a signal generated based on the clock 141 . The timing adjustment circuit 114 detects deviation of the clock 142 from the clock 141 resulting from frequency jitter of the clock 142 , and prevents occurrence of clock racing.