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tms320c6670 芯片的CVDD对地阻抗是多大为正常?



如题,现在板子上两块DSP的CVDD电压对地电阻都为三点几欧,不到4欧的样子,是不是太小了?多大为正常的?希望各位专家和用过这个芯片的可以提供下意见,谢谢