看它的数据手册,有如下的描述:
VDDIO2 = 1.65 to 3.6 V: external power supply for marked I/Os. Provided externally
through the VDDIO2 pin. The VDDIO2 voltage level is completely independent from VDD
or VDDA, but it must not be provided without a valid supply on VDD.
这个意思是说,Vddio2是和VDD和VDDA完全独立的,需要单独供电的意思么? |