The RTC is about .02% off (11 secs after 15hrs)
I am using the KSDK2.0 rtc_func demo ("C:\Freescale\KSDK_2.0\boards\frdmk22f\demo_apps\rtc_func").
I have tried it on 2 different FRDM-K22F eval boards
Board 1: 11 secs fast after 15.5 hrs
Board 2: 7 secs after 15hrs, 22 secs after 40hrs
The FRDM-K22F BOM shows the osc is 20PPM
Am I doing something wrong?
I know the RTC can be adjusted but it is unacceptable to have to customize this for each board.