I have a board with OMAPL138. I am using RTC and connect a battery to RTC_CVDD pin. There is no problem, my board works well. Then I forgot to connect the battery (mean: RTC_CVDD pin is floating) and some peripherals dont work regularly. For example I am using SPI, and sometimes SPI reads wrong datas. Also there are problems about I/O pins. After connecting the battery the problems are continue.
I want to ask, if RTC_CVDD pin is floating and powered the board on this state, it can be cause damage on interface and I/Os ? I mean permanent damage.