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TMS320F28388D: TMS320F28388 的 Vss_osc外部未接地

Part Number: TMS320F28388D

硬件设计时,DSP的时钟采用外部有源时钟,由X1脚引入,但Vss_osc(H18和H19)外部没有接到GND上,处于悬空状态。请问Vss_osc外部不接地,时钟还能否正常工作?