RTC Real-time Clock and Calendar
Time-of-day clock/calendar with subseconds, seconds, minutes, hours (12h/24h format), day (day of week), date (day of month), month, and year.
RTC_DR - RTC Date Register
| DU[3:0] | Date units in BCD format | ||
| DT[1:0] | Date tens in BCD format | ||
| MU[3:0] | Month units in BCD format | ||
| MT | Month tens in BCD format | ||
| WDU[2:0] | Week day units | 000 | Forbidden |
| 001 | Monday | ||
| … | … | ||
| 111 | Sunday | ||
| YU[3:0] | Year units in BCD format | ||
| YT[3:0] | Year tens in BCD format | ||
RTC_TR - RTC Time Register
| SU[3:0] | Second units in BCD format | ||
| ST[2:0] | Second tens in BCD format | ||
| MNU[3:0] | Minute units in BCD format | ||
| MNT[2:0] | Minute tens in BCD format | ||
| HU[3:0] | Hour units in BCD format | ||
| HT[1:0] | Hour tens in BCD format | ||
| PM | AM/PM notation | 0 | AM or 24-hour format |
| 1 | PM | ||
RTC_SSR - RTC Sub Second Register
| SS[15:0] | Sub second value | Second fraction = (PREDIV_S - SS)/(PREDIV_S + 1) | |