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1745D–ATARM–04-Nov-05
AT91M55800A
13.3.4 RTC Calendar Register
Register Name: RTC_CALR
Access Type: Read/Write
Reset State: 0x01819819
Offset: 0x0C
• CENT: Current Century (Code Label RTC_CENT)
The range that can be set is 19 - 20 (BCD).
The lowest four bits encode the units. The higher bits encode the tens.
• YEAR: Current Year (Code Label RTC_YEAR)
The range that can be set is 00 - 99 (BCD).
The lowest four bits encode the units. The higher bits encode the tens.
• MONTH: Current Month (Code Label RTC_MONTH)
The range that can be set is 01 - 12 (BCD).
The lowest four bits encode the units. The higher bits encode the tens.
• DAY: Current Day (Code Label RTC_DAY)
The range that can be set is 1 - 7 (BCD).
The significance of the number (which number represents which day) is user defined as it has no effect on the date
counter.
• DATE: Current Date (Code Label RTC_DATE)
The range that can be set is 01 - 31 (BCD).
The lowest four bits encode the units. The higher bits encode the tens.
31 30 29 28 27 26 25 24
––
DATE
23 22 21 20 19 18 17 16
DAY MONTH
15 14 13 12 11 10 9 8
YEAR
76543210
––
CENT