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F5529实验板 AD转换外接参考电压源的引脚



430初学,想在f5529AD转换中使用外接参考电压源,datasheet上vref+vref-分别为p5.0和p5.1,可是实验板上只有5.1的引脚,那是不是说明正的外接参考电压是没法用的。。?