PCF2129T datasheet(70/73 Pages) NXP

70 / 73 page

PCF2129T

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Product data sheet

Rev. 3 — 12 February 2013

70 of 73

NXP Semiconductors

PCF2129T

Accurate RTC with integrated quartz crystal for industrial

23. Tables

Table 1.

Ordering information . . . . . . . . . . . . . . . . . . . . . .2

Table 2.

Ordering options . . . . . . . . . . . . . . . . . . . . . . . . .2

Table 3.

Marking codes . . . . . . . . . . . . . . . . . . . . . . . . . .2

Table 4.

Pin description of PCF2129T . . . . . . . . . . . . . . .4

Table 5.

Table 6.

Control_1 - control and status register 1

(address 00h) bit description . . . . . . . . . . . . . . .9

Table 7.

Control_2 - control and status register 2

(address 01h) bit description . . . . . . . . . . . . . .10

Table 8.

Control_3 - control and status register 3

(address 02h) bit description . . . . . . . . . . . . . . 11

Table 9.

CLKOUT_ctl - CLKOUT control register

(address 0Fh) bit description . . . . . . . . . . . . . .12

Table 10. Temperature measurement period . . . . . . . . . .12

Table 11. CLKOUT frequency selection . . . . . . . . . . . . . .13

Table 12. Aging_offset - crystal aging offset register

(address 19h) bit description . . . . . . . . . . . . . .14

Table 13. Frequency correction at 25 °C, typical . . . . . . .14

Table 14. Power management control bit description. . . .15

Table 15. Output pin BBS . . . . . . . . . . . . . . . . . . . . . . . . .18

Table 16. Seconds - seconds and clock integrity register

(address 03h) bit description . . . . . . . . . . . . . .24

Table 17. Seconds coded in BCD format . . . . . . . . . . . .24

Table 18. Minutes - minutes register (address 04h) bit

description . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Table 19. Hours - hours register (address 05h) bit

description . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 20. Days - days register (address 06h) bit

description . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 21. Weekdays - weekdays register (address 07h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 22. Weekday assignments . . . . . . . . . . . . . . . . . . .25

Table 23. Months - months register (address 08h) bit

description . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 24. Month assignments in BCD format . . . . . . . . . .26

Table 25. Years - years register (address 09h) bit

description . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 26. Second_alarm - second alarm register

(address 0Ah) bit description . . . . . . . . . . . . . .28

Table 27. Minute_alarm - minute alarm register

(address 0Bh) bit description . . . . . . . . . . . . . .29

Table 28. Hour_alarm - hour alarm register

(address 0Ch) bit description . . . . . . . . . . . . . .29

Table 29. Day_alarm - day alarm register (address 0Dh)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . .29

Table 30. Weekday_alarm - weekday alarm register

(address 0Eh) bit description . . . . . . . . . . . . . .30

Table 31. Watchdg_tim_ctl - watchdog timer control

Table 32. Watchdg_tim_val - watchdog timer value

Table 33. Programmable watchdog timer. . . . . . . . . . . . .32

Table 34. Flag location in register Control_2 . . . . . . . . . .33

Table 35. Example values in register Control_2 . . . . . . . .34

Table 36. Example to clear only AF (bit 4) . . . . . . . . . . . .34

Table 37. Example to clear only MSF (bit 7). . . . . . . . . . .34

Table 38. Timestp_ctl - timestamp control register

(address 12h) bit description . . . . . . . . . . . . . . 36

Table 39. Sec_timestp - second timestamp register

(address 13h) bit description . . . . . . . . . . . . . . 36

Table 40. Min_timestp - minute timestamp register

(address 14h) bit description . . . . . . . . . . . . . . 36

Table 41. Hour_timestp - hour timestamp register

(address 15h) bit description . . . . . . . . . . . . . . 37

Table 42. Day_timestp - day timestamp register

(address 16h) bit description . . . . . . . . . . . . . . 37

Table 43. Mon_timestp - month timestamp register

(address 17h) bit description . . . . . . . . . . . . . . 37

Table 44. Year_timestp - year timestamp register

(address 18h) bit description . . . . . . . . . . . . . . 37

Table 45. Battery switch-over and timestamp . . . . . . . . . 38

Table 46. Effect of bits MI and SI on pin INT and bit MSF 40

Table 47. First increment of time circuits after stop

release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 48. Interface selection input pin IFS. . . . . . . . . . . . 46

Table 49. Serial interface . . . . . . . . . . . . . . . . . . . . . . . . . 47

Table 50. Command byte definition . . . . . . . . . . . . . . . . . 48

Table 51. I2C slave address byte . . . . . . . . . . . . . . . . . . . 51

Table 52. Limiting values . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 53. Static characteristics . . . . . . . . . . . . . . . . . . . . 54

Table 54. Frequency characteristics . . . . . . . . . . . . . . . . 58

Table 55. SPI-bus characteristics . . . . . . . . . . . . . . . . . . 59

Table 56. I2C-bus characteristics . . . . . . . . . . . . . . . . . . . 61

Table 57. Carrier tape dimensions . . . . . . . . . . . . . . . . . 64

Table 58. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table 59. Revision history . . . . . . . . . . . . . . . . . . . . . . . . 67

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