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參數(shù)資料
| 型號： | RV5C339 |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| 中文描述： | 3線串行接口實時時鐘IC，帶有電壓檢測功能 |
| 文件頁數(shù)： | 41/51頁 |
| 文件大?。?/td> | 421K |
| 代理商： | RV5C339 |
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43
RV5C339A
8. Typical Software-based Operations
8.1 Initialization at Power-on
Start
XSTP=1?
Power-on
NO
YES
Warning of Backup Battery
Run-down
VDET=0?
*
1
*
2
*
4
*
3
Set Oscillation Adjustment Register
and Control Registers 1 and 2, etc.
8.2 Writing of Time and Calendar Data
Wait for 31
s
Write to Time Counter
and Calendar Counter
*
1
*
2
*1) After power-on from 0 volts, the start of oscillation and the process of internal initialization require a time span on the order of 1 to 2 seconds, so that
access should be done after the lapse of this time span or more.
*2) The XSTP bit setting of 0 in the control register 1 indicates power-on from backup battery and not from 0 volt. The XSTP bit may fail to be set to 1 in the
presence of any excessive chattering in power supply in such events as installing backup battery. Should there be any possibility of this failure occurring,
it is recommended to initialize the RV5C339A regardless of the current XSTP bit setting. For further details, see “3. Oscillation Halt Sensing and Supply
Voltage Monitoring”.
*3) This step is not required when the supply voltage monitoring circuit is not used.
*4) This step involves ordinary initialization including the oscillation adjustment register and interrupt cycle settings.
*1) This step of waiting is detailed in “1.5 Considerations in Reading
and Writing Time Data”.
*2) Any writing to the second counter will reset divider units lower than
the second digits.
The RV5C339A may also be initialized not at power-on but in the
process of writing time and calender data.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RV5C339A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| RV5C339A_03 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION |
| RV5C339A-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| RV5C348A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| RV5C348B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
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