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F28335主频150MHz,如何输出1K-10KHz的斩波频率?



主PWM50HZ。

SYSCLK 150M

HSPCLKDIV 0 = 1

CLKDIV 7 = 128

TBCLK = SYSCLK / (CLKDIV * HSPCLKDIV) = 1171875

好像斩波频率是按照系统时钟计算的,最大7分频,得到的最小频率是2.343MHz。频率太高了。

如何设置能够得到1K到10K之间的斩波频率??

急求答案。。多谢。。