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TPS65910A3 问题,请帮忙



目前在做AM335x项目,电源采用TPS65910A3,有以下问题:

1、demo板上的是采用按键作为poweron 信号使能 TPS65910A3,如果想开机自动工作,我应该如何处理?

2、TPS65910A3手册中说芯片自带RTC,我的系统采用5V adapter供电,我如果想掉电后,RTC继续保持工作,

      应该如何处理?(单独的rtc芯片只需要加一个很小容量的3.3V的电池即可)