CLOCK GENERATION CIRCUIT, PROCESSOR SYSTEM USING SAME, AND CLOCK FREQUENCY CONTROL METHOD

摘要

A microcomputer includes a register that stores division ratio setting information, a frequency divider that determines first and second division ratios based on the division ratio setting information, frequency-divides a first clock having a first frequency at the first division ratio, and frequency-divides a second clock having a second frequency at the second division ratio, and a CPU. The first and second division ratios are determined in such a manner that a frequency of the first clock that is frequency-divided at the first division ratio and a frequency of the second clock that is frequency-divided at the second division ratio are made equal to each other.

主权项

1. A microcomputer comprising:
a register that stores division ratio setting information; a frequency divider that determines first and second division ratios based on the division ratio setting information, frequency-divides a first clock having a first frequency at the first division ratio, and frequency-divides a second clock having a second frequency at the second division ratio; and a CPU (Central Processing Unit), wherein the first and second division ratios are determined in such a manner that a frequency of the first clock that is frequency-divided at the first division ratio and a frequency of the second clock that is frequency-divided at the second division ratio are made equal to each other.