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DSP 28069 主频开始设置为66M ADC时钟为33M,采样频率为132K,PWM触发,此时ADC 采样正常,当把主时钟降低为33M时,ADC 时钟应为16.5M ,采样频率为132K,此时采样出现乱码?这个是什么原因造成的,恳请TI大神指教