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M41ST85W bảng dữ liệu(PDF) 22 Page - STMicroelectronics

tên linh kiện M41ST85W
Giải thích chi tiết về linh kiện  3.0/3.3V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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M41ST85W bảng dữ liệu(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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