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參數(shù)資料
| 型號： | R2051K |
| 英文描述： | real-time clock ICs |
| 中文描述： | 實時時鐘IC |
| 文件頁數(shù)： | 42/53頁 |
| 文件大?。?/td> | 343K |
| 代理商： | R2051K |
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R2051 Series
In the pulse mode, the increment of the second counter is delayed by approximately 92
μ
s 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 /INTR
pin low.
*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
below.
12345
Rev.1.04 - 42 -
/INTR Pin
(Increment of
second counter)
CTFG Bit
Setting CTFG bit to 0
Setting CTFG bit to 0
(Increment of
second counter)
(Increment of
second counter)
*1), *2) When the oscillation adjustment circuit is used, the interrupt cycle will fluctuate once per 20sec. 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
±
3.784 ms.
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相關代理商/技術參數(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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