Rainbow-electronics AT73C246 Instrukcja Użytkownika Pobierz pdf (Strona 45)

11050A–PMAAC–07-Apr-10

AT73C246

11.10.5 RTC Calendar Register

Name: RTC_CALR

Access: Read-write

Address: 0x0C

•CENT: Current Century

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

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

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

The range that can be set is 1 - 7 (BCD).

The coding of the number (which number represents which day) is user-defined as it has no effect on the date counter.

• DATE: Current Date

The range that can be set is 01 - 31 (BCD).

The lowest four bits encode the units. The higher bits encode the tens.

All non-significant bits read zero.

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

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 158 159

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Rainbow-electronics AT73C246 Instrukcja Użytkownika Strona 45