答:楼上的楼上不是说了吗:这种问题看规格书,规格书中有你想要的所有信息。
规格书中的描述“When using the internal voltage reference, bypass capacitors of 0.1 μF and 4.7 μF are recommended from the VREF pin to GND. If the internal reference is not used, the REFBE bit should be cleared to ‘0’. Electrical specifications for the internal voltage reference are given in Table 6.1. ”