Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsIntegrated Circuits (ICs)Timer IC t- real time clock Clock/calendar SO 20

Product data sheet Rev. 7 — 19 December 2014 82 of 86

NXP Semiconductors

PCF2129

Accurate RTC with integrated quartz crystal for industrial applications

25. Tables

Table 1. Ordering information. . . . . . . . . . . . . . . . . . . . . .2

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

Table 3. Marking codes . . . . . . . . . . . . . . . . . . . . . . . . . .2

Table 4. Pin description of PCF2129 . . . . . . . . . . . . . . . .5

Table 5. Register overview . . . . . . . . . . . . . . . . . . . . . . .8

Table 6. Control_1 - control and status register 1

(address 00h) bit allocation . . . . . . . . . . . . . . .10

Table 7. Control_1 - control and status register 1

(address 00h) bit description . . . . . . . . . . . . . .10

Table 8. Control_2 - control and status register 2

(address 01h) bit allocation . . . . . . . . . . . . . . .11

Table 9. Control_2 - control and status register 2

(address 01h) bit description . . . . . . . . . . . . . .11

Table 10. Control_3 - control and status register 3

(address 02h) bit allocation . . . . . . . . . . . . . . .12

Table 11. Control_3 - control and status register 3

(address 02h) bit description . . . . . . . . . . . . . .12

Table 12. CLKOUT_ctl - CLKOUT control register

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

Table 13. CLKOUT_ctl - CLKOUT control register

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

Table 14. Temperature measurement period . . . . . . . . . .13

Table 15. CLKOUT frequency selection . . . . . . . . . . . . . .14

Table 16. Aging_offset - crystal aging offset register

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

Table 17. Aging_offset - crystal aging offset register

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

Table 18. Frequency correction at 25 °C, typical . . . . . . .15

Table 19. Power management control bit description. . . .16

Table 20. Output pin BBS. . . . . . . . . . . . . . . . . . . . . . . . .21

Table 21. Seconds - seconds and clock integrity

Table 22. Seconds - seconds and clock integrity

Table 23. Seconds coded in BCD format . . . . . . . . . . . .26

Table 24. Minutes - minutes register (address 04h)

bit allocation . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 25. Minutes - minutes register (address 04h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 26. Hours - hours register (address 05h)

bit allocation . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Table 27. Hours - hours register (address 05h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . .27

Table 28. Days - days register (address 06h)

bit allocation . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Table 29. Days - days register (address 06h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . .27

Table 30. Weekdays - weekdays register (address 07h)

bit allocation . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Table 31. Weekdays - weekdays register (address 07h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . .28

Table 32. Weekday assignments . . . . . . . . . . . . . . . . . . .28

Table 33. Months - months register (address 08h)

bit allocation . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Table 34. Months - months register (address 08h)

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

Table 35. Month assignments in BCD format . . . . . . . . . 29

Table 36. Years - years register (address 09h)

bit allocation . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 37. Years - years register (address 09h)

bit description. . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 38. Second_alarm - second alarm register

(address 0Ah) bit allocation . . . . . . . . . . . . . . 33

Table 39. Second_alarm - second alarm register

(address 0Ah) bit description . . . . . . . . . . . . . . 33

Table 40. Minute_alarm - minute alarm register

(address 0Bh) bit allocation . . . . . . . . . . . . . . 33

Table 41. Minute_alarm - minute alarm register

(address 0Bh) bit description . . . . . . . . . . . . . . 33

Table 42. Hour_alarm - hour alarm register

(address 0Ch) bit allocation . . . . . . . . . . . . . . 34

Table 43. Hour_alarm - hour alarm register

(address 0Ch) bit description . . . . . . . . . . . . . 34

Table 44. Day_alarm - day alarm register

(address 0Dh) bit allocation . . . . . . . . . . . . . . 34

Table 45. Day_alarm - day alarm register

(address 0Dh) bit description. . . . . . . . . . . . . . 34

Table 46. Weekday_alarm - weekday alarm register

(address 0Eh) bit allocation . . . . . . . . . . . . . . 35

Table 47. Weekday_alarm - weekday alarm register

(address 0Eh) bit description . . . . . . . . . . . . . . 35

Table 48. Watchdg_tim_ctl - watchdog timer control

Table 49. Watchdg_tim_ctl - watchdog timer control

Table 50. Watchdg_tim_val - watchdog timer value

Table 51. Watchdg_tim_val - watchdog timer value

Table 52. Programmable watchdog timer . . . . . . . . . . . . 37

Table 53. Flag location in register Control_2 . . . . . . . . . . 38

Table 54. Example values in register Control_2 . . . . . . . 39

Table 55. Example to clear only AF (bit 4). . . . . . . . . . . . 39

Table 56. Example to clear only MSF (bit 7) . . . . . . . . . . 39

Table 57. Timestp_ctl - timestamp control register

(address 12h) bit allocation . . . . . . . . . . . . . . . 41

Table 58. Timestp_ctl - timestamp control register

(address 12h) bit description . . . . . . . . . . . . . . 41

Table 59. Sec_timestp - second timestamp register

(address 13h) bit allocation . . . . . . . . . . . . . . . 41

Table 60. Sec_timestp - second timestamp register

(address 13h) bit description . . . . . . . . . . . . . . 41

able 61. Min_timestp - minute timestamp register

(address 14h) bit allocation . . . . . . . . . . . . . . . 42

Table 62. Min_timestp - minute timestamp register

(address 14h) bit description . . . . . . . . . . . . . . 42

Table 63. Hour_timestp - hour timestamp register

(address 15h) bit allocation . . . . . . . . . . . . . . . 42

Table 64. Hour_timestp - hour timestamp register

(address 15h) bit description . . . . . . . . . . . . . . 42

Table 65. Day_timestp - day timestamp register

(address 16h) bit allocation . . . . . . . . . . . . . . . 43