Is there a way to keep the RAM or some portion of it alive with a backup battery on the LPC55xx micro?
Hi
Power Domain “Always On” includes PMC(Power management controller) and RTC.
This domain always has power as long as sufficient voltage is available on VBAT ([1.8 V –3.6 V]), that is external battery.
See below pic. "Always On " domain is in red. While RAM is not controlled by "Always On " domain. So we can't keep RAM with VBAT only.
Have a nice day,
Jun Zhang
Thanks for the quick reply.
It is what it is. I'll have to use external means to keep data alive between power cycles.
You are welcome.