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RV5C387A Datasheet(PDF) 19 Page - RICOH electronics devices division |
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RV5C387A Datasheet(HTML) 19 Page - RICOH electronics devices division |
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19 / 49 page  19 RV5C387A 2.5-3 Year Counter (at Address 6h) D7 D6 D5 D4 D3 D2 D1 D0 Y80 Y40 Y20 Y10 Y8 Y4 Y2 Y1 Y80 Y40 Y20 Y10 Y8 Y4 Y2 Y1 Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite (For writing) (For reading) Default settings* 2.6 Oscillation Adjustment Register (at Address 7h) D7 D6 D5 D4 D3 D2 D1 D0 —F6 F5 F4 F3 F2 F1 F0 0 F6 F5 F4 F3 F2 F1 F0 00000000 (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. 2.6-1 F6 to F0 The oscillation adjustment circuit is configured to change time counts of 1 second on the basis of the settings of the oscillation adjustment register when the second digits read 00, 20, or 40 seconds. Normally, the second counter is incremented once per 32768 32.768-kHz clock pulses generated by the crystal oscillator. Writing to the F6 to F0 bits activates the oscillation adjustment circuit. · The oscillation adjustment circuit will not operate with the same timing (00, 20, or 40 seconds) as the timing of writing to the oscillation adjustment register. · The F6 bit setting of 0 causes an increment of time counts by ((F5, F4, F3, F2, F1, F0) –1) × 2. The F6 bit setting of 1 causes a decrement of time counts by (( F5, F4, F3, F2, F1, F0) +1) × 2. The settings of “*, 0, 0, 0, 0, 0, *” ( “*” representing either “0” or “1” ) in the F6, F5, F4, F3, F2, F1, and F0 bits cause neither an increment nor decrement of time counts. Example: When the second digits read 00, 20, or 40, the settings of “0, 0, 0, 0, 1, 1, 1” in the F6, F5, F4, F3, F2, F1, and F0 bits cause an increment of the current time counts of 32768 by (7–1) × 2 to 32780 (a current time count loss). When the second digits read 00, 20, or 40, the settings of “0, 0, 0, 0, 0, 0, 1” in the F6, F5, F4, F3, F2, F1, and F0 bits cause neither an increment nor a decrement of the current time counts of 32768. When the second digits read 00, 20, or 40, the settings of “1, 1, 1, 1, 1, 1, 0” in the F6, F5, F4, F3, F2, F1, and F0 bits cause a decrement of the current time counts of 32768 by (–2) × 2 to 32764 (a current time count gain). *) 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. |
Similar Part No. - RV5C387A_03 |
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Similar Description - RV5C387A_03 |
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