M41T82 datasheet(28/61 Pages) STMICROELECTRONICS

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Clock operation

M41T82-M41T83

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Doc ID 12578 Rev 12

Table 6.

Digital calibration values

Calibration value (binary)

Calibration value rounded to the nearest ppm

DC4 – DC0

Negative calibration (DCS = 0)

to slow a fast clock

Positive calibration (DCS = 1)

to speed up a slow clock

0 (00000)

1 (00001)

–2

2 (00010)

–4

3 (00011)

–6

4 (00100)

–8

5 (00101)

–10

6 (00110)

–12

7 (00111)

–14

8 (01000)

–16

9 (01001)

–18

10 (01010)

–20

11 (01011)

–22

12 (01100)

–24

13 (01101)

–26

14 (01110)

–28

15 (01111)

–31

16 (10000)

–33

17 (10001)

–35

18 (10010)

–37

19 (10011)

–39

20 (10100)

–41

21 (10101)

–43

22 (10110)

–45

23 (10111)

–47

24 (11000)

–49

25 (11001)

–51

102

26 (11010)

–53

106

27 (11011)

–55

110

28 (11100)

–57

114

29 (11101)

–59

118

30 (11110)

–61

122

31 (11111)

–63

126

N/491520 (per minute)

N/245760 (per minute)

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