Is there any support for an RTC ?
An RTC? As in a Real Time Clock? Do you mean internal or external? The G120 has an option to add an external battery to keep the time and date of the internal Real Time Clock (if that’s what you mean; now that I mention it, I should add feature to my designs).
I’m using uc5550, ucm dev board.
There is only external real time clock (??)
Are there any calls in TinyClr to access this RTC ?
Take a look at the
GHIElectronics.TinyCLR.Devices.Rtc nuget package
It is documented here and will be live later