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參數(shù)資料
| 型號： | R2051K |
| 英文描述： | real-time clock ICs |
| 中文描述： | 實(shí)時(shí)時(shí)鐘IC |
| 文件頁數(shù)： | 50/53頁 |
| 文件大?。?/td> | 343K |
| 代理商： | R2051K |
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R2051 Series
I
Typical Software-based Operations
G
Initialization at Power-on
12345
Rev.1.04 - 50 -
Start
*1)
Yes
No
VDET=0
Warning Back-up
Battery Run-down
Set Oscillation Adjustment
Register and Control
Register 1 and 2, etc.
Power-on
*2)
*4)
*3)
PON=1
Yes
No
*1)
After power-on from 0 volt, the process of internal initialization require a time span on 1sec, so that
access should be done after /VDCC turning to OFF(H).
The PON bit setting of 0 in the Control Register 1 indicates power-on from backup battery and not from
0v. For further details, see "P.36
I
Power-on Reset, Oscillation Halt Sensing, and Supply Voltage
Monitoring
G
PON, /XST, and VDET ".
This step is not required when the supply voltage monitoring circuit is not used.
This step involves ordinary initialization including the Oscillation Adjustment Register and interrupt cycle
settings, etc.
*2)
*3)
*4)
G
Writing of Time and Calendar Data
Write to Time Counter and
Calendar Counter
*2)
Stop Condition
*3)
Start Condition
*1)
*1) When writing to clock and calendar counters, do not insert Stop
Condition until all times from second to year have been written to
prevent error in writing time. (Detailed in "P.28 Data Transmission under
Special Condition".
*2) Any writing to the second counter will reset divider units lower than the
second digits.
*3) Take care so that process from Start Condition to Stop Condition will be
complete within 0.5sec. (Detailed in "P.28 Data Transmission under
Special Condition".
The R2051 may also be initialized not at power-on but in the process of
writing time and calendar data.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R2051K01-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051K02-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S01-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S02-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S03-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
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