So I am looking at powering the OMAP-L138 RTC by battery.
Side note 1: It's really annoying to need to use an external regulator for this purpose. An internal purpose built, very low leakage regulator would be very handy in this situation.
Ok, so it looks like I need to use a regulator that produces a voltage that is always greater than the core voltage, according to this passage from the datasheet:
(Nevermind, I can't copy paste because TI locked the datasheet from copying to clipboard, which is EXTREMELY ANNOYING).
The gist is that the SPLITPOWER bit needs to be 1 to use a voltage that is lower than the core voltage. The problem is that this bit is 0 by default. How are you ever supposed to use this feature if the RTC is powered up FIRST, before this bit can be set. I don't even understand why it would ever be set to 0 in the first place, but initializing it to 0 pretty much makes it impossible for me to use a dedicated 1.2V regulator in a system that is always running at 1.3V core, as the system will be breaking the rule at every reset, and every time I power it up.
Am I getting this right?
