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PT7C4307W Datasheet(PDF) 9 Page - Pericom Semiconductor Corporation |
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PT7C4307W Datasheet(HTML) 9 Page - Pericom Semiconductor Corporation |
9 / 20 page ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| PT0206(02/05) Ver: 0 9 Preliminary Data Sheet PT7C4307 Real-time Clock Module (I 2C Bus) Days of the week Counter The day counter is a divide-by-7 counter that counts from 01 to 07 and up 07 before starting again from 01. Values that correspond to the day of week are user defined but must be sequential (i.e., if 1 equals Sunday, then 2 equals Monday, and so on). Illogical time and date entries result in undefined operation. Addr. (hex) Description D7 D6 D5 D4 D3 D2 D1 D0 Days of the week 0 0 0 0 0 W4 W2 W1 03 (default) 0 0 0 0 0 Undefined Undefined Undefined Calendar Counter The data format is BCD format. • Day digits: Range from 1 to 31 (for January, March, May, July, August, October and December). Range from 1 to 30 (for April, June, September and November). Range from 1 to 29 (for February in leap years). Range from 1 to 28 (for February in ordinary years). Carried to month digits when cycled to 1. • Month digits: Range from 1 to 12 and carried to year digits when cycled to 1. • Year digits: Range from 00 to 99 and 00, 04, 08, … , 92 and 96 are counted as leap years. Addr. (hex) Description D7 D6 D5 D4 D3 D2 D1 D0 Dates 0 0 D20 D10 D8 D4 D2 D1 04 (default) 0 0 Undefined Undefined Undefined Undefined Undefined Undefined Months 0 0 0 M10 M8 M4 M2 M1 05 (default) 0 0 0 Undefined Undefined Undefined Undefined Undefined Years Y80 Y40 Y20 Y10 Y8 Y4 Y2 Y1 06 (default) Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Note: Any registered imaginary time should be replaced by correct time, otherwise it will cause the clock counter malfunction. |
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