I want to connect a battery for RTC backup to an EMX module. I have a few questions.
Will the RTC_VBA pin still pull from the battery when the module is powered up? I.e. does this pin need connected to a 3.3 volt source when the system is powered up?
Do I need some kind of resistor between the battery and RTC_VBA?
Anyone have an example of circuitry for this or even recharging circuitry for a rechargeable coin battery?
Thanks in advance