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RV5C387A Datasheet(PDF) 14 Page - RICOH electronics devices division |
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RV5C387A Datasheet(HTML) 14 Page - RICOH electronics devices division |
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14 / 42 page  RV5C387A PRELIMINARY 12345 - 14 - 13.2.3. Time Counter (Address 0-2h) • Second Counter (Address 0h) D7 D6 D5 D4 D3 D2 D1 D0 - S40 S20 S10 S8 S4 S2 S1 (For Writing) 0 S40 S20 S10 S8 S4 S2 S1 (For Reading) 0 Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Default Settings *) • Minute Counter (Address 1h) D7 D6 D5 D4 D3 D2 D1 D0 - M40 M20 M10 M8 M4 M2 M1 (For Writing) 0 M40 M20 M10 M8 M4 M2 M1 (For Reading) 0 Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Default Settings *) • Hour Counter (Address 2h) D7 D6 D5 D4 D3 D2 D1 D0 - - P ⋅/A or H20 H10 H8 H4 H2 H1 (For Writing) 0 0 P ⋅/A or H20 H10 H8 H4 H2 H1 (For Reading) 0 0 Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite 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. * Time digit display (BCD format) as follows: The second digits range from 00 to 59 and are carried to the minute digit in transition from 59 to 00. The minute digits range from 00 to 59 and are carried to the hour digits in transition from 59 to 00. The hour digits range as shown in "13.2.1. – (2). /12 ⋅24: 12-/24-hour Mode Selection Bit" and are carried to the day-of-month and day-of-week digits in transition from PM11 to AM12 or from 23 to 00. * Any writing to the second counter resets divider units of less than 1 second. * Any carry from lower digits with the writing of non-existent time may cause the time counters to malfunction. Therefore, such incorrect writing should be replaced with the writing of existent time data. 13.2.4. Day-of-week Counter (Address 3h) D7 D6 D5 D4 D3 D2 D1 D0 - - - - - W4 W2 W1 (For Writing) 0 0 0 0 0 W4 W2 W1 (For Reading) 0 0 0 0 0 Indefinite Indefinite Indefinite 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. |
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