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STLED325 Datasheet(PDF) 24 Page - STMicroelectronics

Part # STLED325
Description  Standby power management to host
PDF  62 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLED325 Datasheet(HTML) 24 Page - STMicroelectronics

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Functional description
STLED325
24/62
Doc ID 17576 Rev 1
3.11.7
Programmable display
The default display of the RTC time is the 2 MSB digit for hour and the 2 LSB digit for
minutes. However, if the MD_HM_MS bit is set, then the RTC display for the digits can be
changed according to Table 6.
3.11.8
Lookup table with ppm against the calibration register values
The lookup table of the calibration register values for the equivalent ppm is shown in Table 7
below:
Table 6.
RTC display
MD_HM_MS
RTC display
10
Date-month
00
Hour-minute (default and recommended)
01
Minute-second
11
Month-date
Table 7.
LUT with ppm against the calibration register values
Sign bit
Counts/bit
PPM
000
000
0
000
001
2
000
010
4
000
011
6
000
100
8
000
101
10
000
110
12
000
111
14
001
000
16
001
001
18
001
010
20
001
011
22
001
100
24
001
101
26
001
110
28
001
111
31
010
000
33
010
001
35
010
010
37
010
011
39
010
000
41
010
001
43
010
010
45
010
011
47



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