参数资料
型号: M41T94MQ6E
厂商: STMICROELECTRONICS
元件分类: 时钟/数据恢复及定时提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO16
封装: ROHS COMPLIANT, PLASTIC, SOIC-16
文件页数: 18/41页
文件大小: 352K
代理商: M41T94MQ6E
M41T94
Clock operations
Figure 14.
Crystal accuracy across temperature
Figure 15.
Calibration waveform
4.9
Century bit
Bits D7 and D6 of clock register 03h contain the CENTURY ENABLE bit (CEB) and the
CENTURY bit (CB). Setting CEB to a '1' will cause CB to toggle, either from a '0' to '1' or
from '1' to '0' at the turn of the century (depending upon its initial state). If CEB is set to a '0,'
CB will not toggle.
AI00999b
–160
0
10203040506070
Frequency (ppm)
Temperature
°C
80
–10
–20
–30
–40
–100
–120
–140
–40
–60
–80
20
0
–20
ΔF
= K x (T –TO)
2
K = –0.036 ppm/
°C2 ± 0.006 ppm/°C2
TO = 25°C ± 5°C
F
AI00594B
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
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