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RV5C387A Datasheet(PDF) 18 Page - RICOH electronics devices division |
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RV5C387A Datasheet(HTML) 18 Page - RICOH electronics devices division |
18 / 49 page 18 2.4 Day-of-week Counter (at Address 3h) D7 D6 D5 D4 D3 D2 D1 D0 ————— W4 W2 W1 00000 W4 W2 W1 0 000 0 Indefinite Indefinite Indefinite (For writing) (For reading) Default settings* *) Default settings: Default value means read/written values when the XSTP bit is set to “1” due to power-on from 0 volts or supply voltage drop. · The day-of-week counter is incremented by 1 when the day-of-week digits are carried to the day-of-month digits. · Day-of-week display (incremented in septimal notation): (W4, W2, W1) = (0, 0, 0) → (0, 0, 1) → ... → (1, 1, 0) → (0, 0, 0) · Correspondences between days of the week and the day-of-week digits are user-definable (e.g. Sunday = 0, 0, 0) · The writing of (1, 1, 1) to (W4, W2, W1) is prohibited except when days of the week are unused. 2.5 Calendar Counters (at Addresses 4h to 6h) · The calendar counters are configured to display the calendar digits in BCD format by using the automatic calendar function as follows: The day-of-month digits (D20 to D1) range from 1 to 31 for January, March, May, July, August, October, and December; from 1 to 30 for April, June, September, and November; from 1 to 29 for February in leap years; from 1 to 28 for February in ordinary years. The day-of-month digits are carried to the month digits in reversion from the last day of the month to 1. The month digits (MO10 to MO1) range from 1 to 12 and are carried to the year digits in reversion from 12 to 1. The year digits (Y80 to Y1) range from 00 to 99 (00, 04, 08, ... , 92, and 96 in leap years) and are carried to the 19/20 digits in reversion from 99 to 00. The 19/20 digits cycle between 0 and 1 in reversion from 99 to 00 in the year digits. · Any carry from lower digits with the writing of non-existent calendar data may cause the calendar counters to malfunction. Therefore, such incorrect writing should be replaced with the writing of existent calendar data. 2.5-1 Day-of-month Counter (at Address 4h) D7 D6 D5 D4 D3 D2 D1 D0 —— D20 D10 D8 D4 D2 D1 00 D20 D10 D8 D4 D2 D1 00 Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite (For writing) (For reading) Default settings* 2.5-2 Month Counter + Century Bit (at Address 5h) D7 D6 D5 D4 D3 D2 D1 D0 19/20 — — MO10 MO8 MO4 MO2 MO1 19/20 0 0 MO10 MO8 MO4 MO2 MO1 Indefinite 0 0 Indefinite Indefinite Indefinite Indefinite Indefinite (For writing) (For reading) Default settings* RV5C387A |
Similar Part No. - RV5C387A_03 |
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Similar Description - RV5C387A_03 |
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