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RV5C386A Datasheet(PDF) 41 Page - RICOH electronics devices division

Part No. RV5C386A
Description  I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

RV5C386A Datasheet(HTML) 41 Page - RICOH electronics devices division

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41
RV5C386A
Setting CTFG bit to 0
(Increment of
second counter)
(Increment of
second counter)
(Increment of
second counter)
CTFG bit
INTRA pin
Setting CTFG bit to 0
5. 32-kHz Clock Output
For the RV5C386A, 32.768kHz clock pulses are output from the 32KOUT pin when the CLKC pin is set to high.
If CLKC is set to “L” or open, the 32KOUT pin is driven low, as illustrated in the timing chart below.
MAX. 76.3
µs
CLKC pin
32KOUT pin
• Level Mode
Approx. 92
µs
CTFG bit
INTRA pin
(Increment of second counter)
Rewriting of the second counter
Relation Between the Mode Waveform and the CTFG Bit
• Pulse Mode
*) In the pulse mode, the increment of the second counter is delayed by approximately 92 µs from the falling edge of clock pulses. Consequently, time
readings immediately after the falling edge of clock pulses may appear to lag behind the time counts of the real-time clocks by approximately 1 second.
Rewriting the second counter will reset the other time counters of less than 1 second, driving the INTRA pin low.


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