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參數(shù)資料
| 型號： | R2061K |
| 英文描述： | real-time clock ICs |
| 中文描述： | 實(shí)時時鐘IC |
| 文件頁數(shù)： | 28/48頁 |
| 文件大?。?/td> | 322K |
| 代理商： | R2061K |
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R2061 Series
The R2061, which incorporate the CG and the CD, require adjusting the oscillation frequency of the crystal
oscillator through its CL value.
Generally, the relationship between the CL value and the CG and CD values can be represented by the
following equation:
CL = (CG
×
CD)/(CG + CD) + CS where "CS" represents the floating capacity of the printed circuit board.
The crystal oscillator intended for use in the R2061 is recommended to have the CL value on the order of 6 to
8pF. Its oscillation frequency should be measured by the method described in " P27
G
Measurement of
Oscillation Frequency". Any crystal oscillator found to have an excessively high or low oscillation frequency
(causing a time count gain or loss, respectively) should be replaced with another one having a smaller and
greater CL value, respectively until another one having an optimum CL value is selected. In this case, the bit
settings disabling the oscillation adjustment circuit (see " P29
G
Oscillation Adjustment Circuit ") should be
written to the oscillation adjustment register.
Incidentally, the high oscillation frequency of the crystal oscillator can also be adjusted by adding an external
oscillation stabilization capacitor CGOUT as illustrated in the diagram below.
12345
Rev.1.00 - 28 -
32kHz
RD
CG
CD
OSCIN
OSCOUT
CGOUT
*1)
Oscillator
Circuit
*1) The CGOUT should have a capacitance ranging
from 0 to 15 pF.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R2061K01-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2061K03-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2061S02-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2062 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2062K01-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
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