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參數(shù)資料
| 型號： | R2023T |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 2-wire Serial Interface Real Time Clock IC |
| 中文描述： | 2線串行接口實(shí)時(shí)時(shí)鐘芯片 |
| 文件頁數(shù)： | 41/50頁 |
| 文件大小： | 512K |
| 代理商： | R2023T |
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R2023K/T
41
*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 below.
INTRA Pin
Rewriting of the second counter
CTFG Bit
Approx. 92
μ
s
(Increment of second counter)
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 INTRA 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.
INTRA 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(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| R2023T-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2-wire Serial Interface Real Time Clock IC |
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| R2025S | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:High precision I2C-Bus Real-Time Clock Module |
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