RTC Trim Register.
TRIM | RTC Trim. This register contains the 2’s complement value that specifies the trim resolution. Each increment or decrement of the bit adds or subtracts 1ppm at each 4KHz clock value, with a maximum correction of +/- 127ppm. |
VBATTMR | VBAT Timer Value. When RTC is running off of VBAT, this field is incremented every 32 seconds. |