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C5509A +AIC23 在mcbsp0口通讯时,aic23有巨大杂音



程序在mcbsp1口工作时,完全正常,声音输入输出正常。

改变程序,程序在mcbsp0口工作时,有巨大杂音。已经分开模拟地和数字地,模拟电源和数字电源分开。

我在广州,希望当面请教。