RV5C387A_03 datasheet(12/49 Pages) RICOH

Part #	RV5C387A

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

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RV5C387A

12

2.1-5 CT2, CT1, and CT0

Periodic Interrupt Selection Bits

CT2

CT1

CT0

Description

Waveform Mode

Interrupt Cycle and Fall Timing

00

0—

Off (“H”)

00

1—

Fixed at low (“L”)

01

0

Pulse Mode

2Hz (Duty cycle of 50%)

01

1

Pulse Mode

1Hz (Duty cycle of 50%)

10

0

Level Mode

Once per 1 second (Synchronized with second counter increment)

10

1

Level Mode

Once per minute (at 00 seconds of every minute)

11

0

Level Mode

Once per hour (at 00 minutes and 00 seconds of every hour)

11

1

Level Mode

Once per month (at 00 hours, 00 minutes, and 00 seconds of first day of every month)

(Default setting)

1) Pulse Mode: 2-Hz and 1-Hz clock pulses are output in synchronization with the increment of the second counter

as illustrated in the timing chart on the next page.

2) Level Mode: periodic interrupt signals are output with selectable interrupt cycle settings of 1 second, 1 minute,

1 hour, and 1 month. The increment of the second counter is synchronized with the falling edge of

periodic interrupt signals. For example, periodic interrupt signals with an interrupt cycle setting

of 1 second are output in synchronization with the increment of the second counter as illustrated

in the timing chart on the next page.

3) When the oscillation adjustment circuit is used, the interrupt cycle will fluctuate once per 20 seconds as follows:

Pulse Mode: the “L” period of output pulses will increment or decrement by a maximum of ±3.784ms.

For example, 1-Hz clock pulses will have a duty cycle of 50 ±0.3784%.

Level Mode: a periodic interrupt cycle of 1 second will increment or decrement by a maximum of ±3.784ms.

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RV5C387A Datasheet(PDF) 12 Page - RICOH electronics devices division

RV5C387A Datasheet(HTML) 12 Page - RICOH electronics devices division

Similar Part No. - RV5C387A_03

Similar Description - RV5C387A_03

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