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參數(shù)資料
| 型號： | S-35399A03-J8T2U |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | HALOGEN FREE AND LEAD FREE, SOP-8 |
| 文件頁數(shù)： | 24/53頁 |
| 文件大?。?/td> | 472K |
| 代理商： | S-35399A03-J8T2U |
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2-WIRE REAL-TIME CLOCK
S-35399A03
Rev.2.0_00
Seiko Instruments Inc.
30
3. How to confirm setting value for register and result of correction
The S-35399A03 does not adjust the frequency of the crystal oscillation by using the clock-correction function. Therefore
users cannot confirm if it is corrected or not by measuring output 32.768 kHz. When the function to clock-correction is
being used, the cycle of 1 Hz clock pulse output from the
1
INT
pin changes once in 20 times or 60 times, as shown in
Figure 31
.
INT1 pin
(1 Hz output)
a
b
B0 = 0, a : 19 times, b : Once
B0 = 1, a : 59 times, b : Once
19 times or 59 times
Once
Figure 31 Confirmation of Correction Result
Measure a and b by using the frequency counter
*1. Calculate the average frequency (Tave) based on the measurement
results.
B0 = 0, Tave = (a
× 19 + b) ÷ 20
B0 = 1, Tave = (a
× 59 + b) ÷ 60
Calculate the error of the clock based on the average frequency (Tave).
The following shows an example for
confirmation.
Confirmation example: When B0 =0, 66h is set
Measurement results: a = 1.000080 Hz, b = 0.998493 Hz
Clock Correction Register Setting Value
Average Frequency [Hz]
Per Day [s]
Before correction
00 h (Tave = a)
1.000080
86393
After correction
66 h (Tave = (a
× 19 + b) ÷ 20) 1.00000065
86399.9
Calculating the average frequency allows to confirm the result of correction.
*1.
Use a high-accuracy frequency counter of 7 digits or more.
Caution
Measure the oscillation frequency under the usage conditions.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S354 | 制造商:Johnson Electric / Parlex Corporation 功能描述: 制造商:Johnson Electric / Saia-Burgess 功能描述:Non Catalogue / S354 制造商:SAIA - BURGESS ELECTRONICS INC. 功能描述:Non Catalogue / S354 |
| S3540 | 制造商:Microsemi Corporation 功能描述:STD RECOVERY RECTFR 400V 70A 2PIN DO-203AB - Bulk 制造商:MERKLE-KORFF INDUSTRIES 功能描述:OLD COLMAN P/N: 8004002 |
| S354-006 | 功能描述:CABLE SCSI II C50M/M 6' RoHS:是 類別:電纜組件 >> D形，Centronics 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 配置:VHDCI 68 位置公型至公型 長度:10.00'（3.05m） 纜線類型:圓形 - 黑色 屏蔽:屏蔽 樣式:SCSI Ultra 2 |
| S3-5409-LAB (W/O COVER) | 制造商:Molex 功能描述:CONNECTOR - Bulk |
| S3540PF | 制造商:Microsemi Corporation 功能描述:400V 35A 2PIN DO-21 - Bulk |
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