stled325 STMicroelectronics, stled325 Datasheet - Page 24

• Manufacturer Part Number: stled325
• Description: I?c Interfaced, Advanced Led Controller/driver With Keyscan, Standby Power Management And Real Time Clock Rtc
• Manufacturer: STMicroelectronics

Functional description
3.11.7
3.11.8
24/62
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.
Lookup table with ppm against the calibration register values
The lookup table of the calibration register values for the equivalent ppm is shown in
below:
Table 7.
Sign bit
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
RTC display
LUT with ppm against the calibration register values
MD_HM_MS
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
10
00
01
11
Table
6.
Doc ID 17576 Rev 1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Counts/bit
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
Hour-minute (default and recommended)
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Minute-second
RTC display
Date-month
Month-date
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
STLED325
Table 7
PPM
10
12
14
16
18
20
22
24
26
28
31
33
35
37
39
41
43
45
47
0
2
4
6
8