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參數(shù)資料
| 型號(hào)： | RX-4045NBAA |
| 元件分類： | XO, clock |
| 英文描述： | REAL TIME CLOCK, PDSO22 |
| 封裝： | ROHS COMPLIANT, SON-22 |
| 文件頁數(shù)： | 10/37頁 |
| 文件大?。?/td> | 554K |
| 代理商： | RX-4045NBAA |
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RX - 4045 SA / NB
Page - 15
MQ442-01
8.3.3. Adjustment examples
Example 1) Setting time forward
Objective) To adjust (advance) the clock precision when FOUT clock output is 32767.7 Hz
(1) Determine the current amount of variance
32767.7 Hz
→ (32767.7 32768) / 32768 [ 32768 ] = Reference values
→ 9.16 × 10
6
(2) Calculate the optimum adjustment data (decimal value) relative to the current variance.
Adjustment data = variance / adjustment resolution
=
9.16 / 3.05
≈ 3 (decimal values are rounded down from 4 and up from 5)
For adjusting forward from a retarded variance, this formula can be corrected using reciprocal numbers, but since this
product inverts the +/- attributes, this formula can be used as it is.
(3) Calculate the setting adjustment data (hexadecimal)
To calculate the setting adjustment data while taking 7-bit binary encoding into account,
subtract the adjustment data (decimal) from 128 (80h).
Setting adjustment data = 128
3 = 125 (decimal)
= 80h
03h = 7Dh (hexadecimal)
Example 2) Setting time backward
Objective) To adjust (set back) the clock precision when FOUT clock output is 32768.3 Hz
(1) Determine the current amount of variance
32768.3 Hz
→ (32768.3 32768) / 32768 [ 32768 ] = reference values
→ +9.16 × 10
6
(2) Calculate the optimum adjustment data (decimal value) relative to the current variance.
Adjustment data = (variance / adjustment resolution) + 1
= (+9.16 / 3.05) + 1
Add 1 since reference value is 01h
≈ +4 (decimal values are rounded down from 4 and up from 5)
For adjusting backward from an advanced variance, this formula can be corrected using reciprocal numbers, but
since this product inverts the +/- attributes, this formula can be used as it is.
(3) Calculate the setting adjustment data (hexadecimal)
The value "4" can be used in hexadecimal as it is (04h).
Setting adjustment data = 04 h (hexadecimal)
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|---|---|
| RX-4045SA-0 | REAL TIME CLOCK, PDSO14 |
| RX-4045SA-3 | REAL TIME CLOCK, PDSO14 |
| RX-4801JE | REAL TIME CLOCK, PDSO20 |
| RX5C348A | 4-WIRE SERIAL INTERFACE |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RX-4045SA | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-wire serial interface high-stability RTC module |
| RX-4045SA,(AA) | 制造商:Epson Toyocom 功能描述:Serial Interface RTC SOP 14pin |
| RX-4045SAAA | 制造商:Epson Toyocom Corporation 功能描述:Cut Tape 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL SMD SOP14 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL, SMD, SOP14 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL, SMD, SOP14; Date Format:YYYY:MM:DD:Hr:Min:Secs; Clock Format:12Hr / 24Hr; Clock IC Type:RTC; Supply Voltage Min:1.7V; Supply Voltage Max:5.5V; Digital IC Case Style:SOP; No. of Pins:14; Interface Type:Serial;;RoHS Compliant: Yes |
| RX-409 | 功能描述:烙鐵 SOLDERING TIP RoHS:否 制造商:Weller 產(chǎn)品:Soldering Stations 類型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大溫度:+ 850 F 電纜類型:US Cord Included |
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