XTIrtc AI 32 kHz crystal input for RTC. If it isn’t used, it has to be High (VDDRTC). XTOrtc AO 32 kHz crystal output for RTC. If it isn’t used, it has to be Float. 晶振引脚没问题
RTCVDD P RTC VDD (3.0V, Input range: 1.8 ~ 3.6V) This pin must be connected to power properly if RTC isn't used.
RTCVDD应该如何接啊?怎么才算properly? |