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STM32 RTC问题

作者：时间：2016-11-20 来源：网络

STM32的RTC用纽扣电池供电，本来考虑将电池正极接到一个AD端口，采集电压值，但发现电池很快消耗殆尽，测量电流得到电流竟然高达20mA，而且单片机是工作的，还能驱动外围电路。

下图是设计的电路图：

下面是出现这种问题的原因：I/O接二极管到VCC。

RTC

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关键词： STM32RTC问

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