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M41ST85W Arkusz danych(PDF) 22 Page - STMicroelectronics

Numer części M41ST85W
Szczegółowy opis  3.0/3.3V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor
PDF  41 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST85W Arkusz danych(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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