參數(shù)資料
型號(hào)： RS5C372A
廠商： RICOH COMPANY LTD
元件分類： XO, clock
英文描述： I2C bus SERIAL INTERFACE REAL-TIME CLOCK ICs
中文描述： 0 TIMER(S), REAL TIME CLOCK, PDSO8
封裝： SSOP-8
文件頁(yè)數(shù)： 43/59頁(yè)
文件大?。?/td> 442K
代理商： RS5C372A
RS5C372A/B
39
Example of Calculations
(1) When oscillation frequency=32768.85kHz ; target frequency=32768.05kHz
Adjustment value= (32768.85–32768.05+0.1) / (32768.85
×
3.051
×
10
–6
) = (32768.85+32768.05)
×
10+1=9.001=9
Set (F
6
, F
5
, F
4
, F
3
, F
2
, F
1
, F
0
) to (0, 0, 0, 1, 0, 0, 1).
As this example shows, adjustments to be used when the clock gains shall be distance from 01h.
(2) When actual oscillation frequency=32763.95kHz ; target frequency=32768.05kHz
Adjustment value= (32763.95–32768.05) / (32763.95
×
3.051
×
10
–6
) = (32763.95–32768.05)
×
10=–41.015=–41
To express –41 in 7bit binary digits with sign bit (two's compliment),
Subtract 41(29h) from 128(80h) in the above case, 80h–29h=57h.
Thus, set (F
6
, F
5
, F
4
, F
3
, F
2
, F
1
, F
0
) to (1, 0, 1, 0, 1, 1, 1).
As this example shows, adjustments to be used when the clock loses shall be distance from 80h.
After adjustment, adjustment error against the target frequency will be approx. ±1.5ppm at a room temperature.
Notes
1) Clock frequency output from the INTRB (32KOUT for the RS5C372B) pin will not change after adjustment
by the clock adjustment circuit.
2) Adjustable range: The range of adjustment values for a case oscillation frequency is higher than target fre-
quency (clock gains) is (F
6
, F
5
, F
4
, F
3
, F
2
, F
1
, F
0
)=(0, 0, 0, 0, 0, 1, 0) to (0, 1, 1, 1, 1, 1, 1) and actual
adjustable amount shall be –3.05ppm to –189.2ppm (–3.125ppm to –193.7ppm for 32.000kHz crystal), thus
clock error may be adjusted until clock gain reaches +189.2ppm (+193.7ppm for 32.000kHz crystal).
On the other hand, the range of adjustment values for a case when oscillation frequency is lower than tar-
get frequency (clock loses) is (F
6
, F
5
, F
4
, F
3
, F
2
, F
1
, F
0
)=(1, 1, 1, 1, 1, 1, 1) to (1, 0, 0, 0, 0, 1, 0) and actual
adjustable amount shall be +3.05ppm to +189.2ppm (+3.125ppm to +193.8ppm for 32.000kHz crystal), thus
clock error may be adjsted until clock loss reaches –189.2ppm (–193.8ppm for 32.000kHz crystal).
相關(guān)PDF資料
PDF描述
RS5C372B I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E1 I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E2 I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C62 REAL-TIME CLOCK
RSBL-9-S Using Permanent Magnet, High sensitivity Two Poles Signal Relay RSB RELAYS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RS5C372B 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E1 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C373A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Real-Time Clock
RS5C4FC 制造商:Dialight 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*