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M41ST85W 데이터시트(PDF) 22 Page - STMicroelectronics

부품명 M41ST85W
상세설명  3.0/3.3V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor
PDF  41 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST85W 데이터시트(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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