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參數(shù)資料
| 型號(hào)： | AN925 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Time Update in ST’s TIMEKEEPER Devices |
| 中文描述： | 時(shí)間更新ST的計(jì)時(shí)設(shè)備 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 32K |
| 代理商： | AN925 |
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AN925 - APPLICATION NOTE
An alternative approach, shown in Figure 3, is adopted by the M48T02, M48T12, M48T08, M48T18,
M48T58 (revision C), , M48T59 (revision C), M48T37 and M48T201 devices. The spacing between suc-
cessive System-to-User-Update-Pulse is always one second. Each pulse is delayed by the same delta
time, of 3.5 ms, regardless of the number of registers that need incrementing within that period.
Figure 3. Time Update Waveform Diagram (fixed delay)
(These examples are each shown with the calibration set to zero.)
12/31/96 23:59:59
1/1/97 00:00:00
1 Hz clock frequency
Seconds register update
Minutes register update
Hours register update
Day of week register update
Date register update
Month register update
Year register update
Reference update pulse
System to user update pulse
= 1 second
AI02484
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