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參數(shù)資料
| 型號(hào)： | 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)： | 35/50頁 |
| 文件大小： | 512K |
| 代理商： | R2023T |
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R2023K/T
35
2. Access to R2023K/T at random, or synchronized with external clock that has no relation to R2023K/T, or
synchronized with periodic interrupt in pulse mode.
3. Access to R2023K/T more than 2 times per each second on average.
For more details, please contact to Ricoh.
How to evaluate the clock gain or loss
The oscillator adjustment circuit is configured to change time counts of 1 second on the basis of the settings of the
oscillation adjustment register once in 20 seconds or 60 seconds. The oscillation adjustment circuit does not
effect the frequency of 32768Hz-clock pulse output from the 32KOUT pin. Therefore, after writing the oscillation
adjustment register, we cannot measure the clock error with probing 32KOUT clock pulses. The way to measure
the clock error as follows:
(1) Output a 1Hz clock pulse of Pulse Mode with interrupt pin
Set (0,0,x,x,0,0,1,1) to Control Register 1 at address Eh.
(2) After setting the oscillation adjustment register, 1Hz clock period changes every 20seconds ( or every 60
seconds) like next page figure.
1Hz clock pulse
T0
T0
T0
T1
1 time
19 times
Measure the interval of T0 and T1 with frequency counter. A frequency counter with 7 or more digits is
recommended for the measurement.
(3) Calculate the typical period from T0 and T1
T = (19
×
T0+1
×
T1)/20
Calculate the time error from T.
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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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| R2025D | 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 |
| 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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