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| 型號(hào)： | RTC-4543 |
| 廠商： | 愛普生（中國）有限公司 |
| 英文描述： | Serial-Interface Real Time Clock Module(串行接口實(shí)時(shí)時(shí)鐘模塊) |
| 中文描述： | 串行接口實(shí)時(shí)時(shí)鐘模塊（串行接口實(shí)時(shí)時(shí)鐘模塊） |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 124K |
| 代理商： | RTC-4543 |
86
EPSON
SEIKO EPSON CORPORATION
Electronics Device & Components Marketing Div.
3F OD Bldg.421-8 Hino,Hino-shi,Tokyo,191-8501
Dec.28,1998
Re :The Year 2000 Readiness Disclosure for Real Time Clock Module
Dear valued customer:
1. Our RTC products do not have counters of the four-digit year.
2. In other words, there are two categories regarding the counter construction.
A: Year counter consists of the bottom two digits of the four-digit year .(RTC shown in appendix A) or
B: Year counter consists of one digit and it is available with zero to three (ie,0,1,2,3)
(RTC shown in appendix B)
This counter is incremented every year (it will go to 0 after 3).
Initial setting of the year counter is required as follows;
Leap year ; set "0" to the year counter
Leap year +1 ; set "1"
Leap year +2 ; set "2"
Year before leap year ; set "3"
3. The years having multiples of four or having 00 are recognized as a leap year. (RTC shown in
appendix A )
4. The years having 0 in the year counter are recognized as a leap year.(RTC shown in appendix B)
5. For your information, year 2000 is a leap year, however, 1900 or 2100 is not a leap year. (Usually,
multiples of a hundred is not a leap year, but a leap year comes every 400 years.) In terms of a leap year
recognition, our RTC Products will work correctly until 2099.
You are requested to prepare for so-called year 2000 issue by yourself in conjunction with the above RTC
Products. You need to make or modify your own program algorithm accordingly based on the above
information. If you do not, the above RTC Products may not work appropriately.
If you have any questions regarding this matter, please contact a nearest sales office or representatives
Appendix A
RTC45xx,RTC58xxx,RTC62xxx,RTC63xxx,RTC64xxx,RTC65xxx,RTC72xxx series and
RTC8563
Appendix B
RTC-8583,RTC8593
Sincerely yours,
Y2K project
Electronics Device & Components Marketing Div.
This letter is to inform you of the operation of our Real Time Clock Module (RTC) products with respect to so-called year
2000 issue. Please refer to the following information. In addition, information concerning Year 2000 readiness disclosed
herein constitutes a Year 2000 Readiness Disclosure as that term is defined in the Year 2000 Information and Readiness
Disclosure Act, U.S. P.L. 105-271. Nothing in this disclosure shall be deemed to amend the terms of any contract or
warranty unless otherwise expressly agreed by Seiko Epson Corporation.
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| RTC-4573SB | Serial-Interface Real Time Clock With Alarm and Timer(串行接口實(shí)時(shí)時(shí)鐘模塊（帶報(bào)警器和時(shí)鐘）) |
| RTC-4574JE | Serial RTC Module With Alarm and Timer Functions(串行接口實(shí)時(shí)時(shí)鐘模塊（帶報(bào)警器和時(shí)鐘）) |
| RTC-4574SA | Serial RTC Module With Alarm and Timer Functions(串行接口實(shí)時(shí)時(shí)鐘模塊（帶報(bào)警器和時(shí)鐘）) |
| RTC-4574 | Serial Rtc Module WichAlarm And Timer Functions(帶警報(bào)器和定時(shí)器的串行接口實(shí)時(shí)時(shí)鐘模塊) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RTC4543SA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SERIAL-INTERFACE REAL TIME CLOCK MODULE(66.74 k) |
| RTC-4543SA | 制造商:Seiko Epson Corporation 功能描述: 制造商:Epson Electronics America Inc 功能描述:RTC module,3Wire Serial,Alarm,SOP14 |
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