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參數(shù)資料
| 型號： | RS5C313 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | PrimeSTACK up to 1700V Half Bridge |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.65 MM PITCH, SSOP-8 |
| 文件頁數(shù)： | 22/32頁 |
| 文件大?。?/td> | 267K |
| 代理商： | RS5C313 |
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RS5C313
19
7.1 Oscillation Frequency Measurement
7. Oscillation Frequency Adjustment
INTR
OSCOUT
OSCIN
VDD
CE
VSS
32kHz
+5V or +3V
Frequency
counter
C
G
1) When switch the CE pin to the high level after low level or
open state, a 1-Hz interrupt pulse is output from the INTR
pin about 2.5 seconds later. Measure this interrupt pulse by
using a frequency counter
2) Ensure that the frequency counter has more than six digits
(on the order of 1 ppm).
3) Place the C
G
between the OSCIN pin and the V
SS
level and
pull up the INTR pin output to the V
DD
.
*
1) To ensure that the crystal is matched to the IC, inquire its crystal supplier about its C
L
(load capacitance) and R1 (equivalent series resistance) val-
ues. It is recommended that the crystal should have the C
L
value range of 6 to 8pF and the typical R1 value of 30k ohms.
*
2) To allow for the possible effects of floating capacitance, select the optimum capacitance of the C
G
on the mounted PCB. The standard and recom-
mendable capacitance values of the C
G
range from 5 to 24pF and 8 to 20pF, respectively. When you need to change the frequency to get higher
accuracy, change the C
L
value of the crystal.
*
3) Collate the central variable capacitance value of the C
G
with its oscillation frequency by adjusting the angle of rotation of the variable capacitance of
the C
G
in such a manner that the actual variable capacitance value is slightly smaller than the central variable capacitance value. (It is recommended
that the central variable capacitance value should be slightly less than one half of the actual variable capacitance value because the smaller is vari-
able capacitance, the greater are fluctuations in oscillation frequency.) In the case of an excessive deviation of the oscillation frequency from its
required value, change the C
L
value of the crystal.
7.2 Oscillation Frequency Adjustment
Select crystal oscillator
NG
OK
OK
NG
Fix C
G
.
(For fixed capacitance)
(For variable capacitance)
Change C
L
value of crystal.
Optimize C
G
.
End
End
Fix the capacitance of C
G.
Optimize central variable
capacitance value
Make fine frequency adjustment
with variable capacitance.
Change the C
L
value of crystal.
*
1
*
3
*
3
*
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RS5C314 | PrimeSTACK up to 1700V Half Bridge |
| RS5C316 | MINIATURE POWER RELAY |
| RS5C316A | ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs |
| RS5C316B | ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs |
| RS5C317A | ULTRA-COMPACT HIGH PERFORMANCE SERIAL REAL-TIME CLOCK ICs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RS5C314 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:ULTRA-COMPACT REAL-TIME CLOCK IC |
| RS5C316 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs |
| RS5C316A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs |
| RS5C316A/B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:real-time clock ICs |
| RS5C316B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:ULTRA-COMPACT SERIAL ALARM REAL-TIME CLOCK ICs |
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