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M41ST85WMH6 датащи(PDF) 22 Page - STMicroelectronics |
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M41ST85WMH6 датащи(HTML) 22 Page - STMicroelectronics |
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22 / 41 page ![]() Clock operation M41ST85W 22/41 Figure 13. Crystal accuracy across temperature Figure 14. Calibration waveform 3.4 Setting alarm clock registers Address locations 0Ah-0Eh contain the alarm settings. The alarm can be configured to go off at a prescribed time on a specific month, date, hour, minute, or second, or repeat every year, month, day, hour, minute, or second. It can also be programmed to go off while the M41ST85W is in the battery back-up to serve as a system wake-up call. AI07888 –160 0 10203040506070 Frequency (ppm) Temperature °C 80 –10 –20 –30 –40 –100 –120 –140 –40 –60 –80 20 0 –20 = –0.036 ppm/ °C 2 ± 0.006 ppm/°C2 K ΔF = K x (T – T O) 2 F T O = 25°C ± 5°C AI00594B NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION |
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