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M41ST85WMH6 Datasheet(PDF) 22 Page - STMicroelectronics

Part # M41ST85WMH6
Description  3.0/3.3V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor
PDF  41 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST85WMH6 Datasheet(HTML) 22 Page - STMicroelectronics

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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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