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TMS320F28377S: TMS320F28377S的ADCINA0~ADCINA5,ADCINB0~ADCINB3,关于adc引脚硬件处理办法的问题

Part Number: TMS320F28377S

TMS320F28377S的ADCINA0~ADCINA5,ADCINB0~ADCINB3,ADCINC2~ADCINC4,ADCIND0~ADCIND3,ADCIN14~ADCIN15,这些adc引脚如果整个系统没有用到adc,这些引脚可以悬空吗?如果不能悬空怎么处理这些引脚?