pcf2127a NXP Semiconductors, pcf2127a Datasheet - Page 76

• Manufacturer Part Number: pcf2127a
• Description: Integrated Rtc, Tcxo And Quartz Crystal
• Manufacturer: NXP Semiconductors

NXP Semiconductors
22. Tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10. CLKOUT frequency selection . . . . . . . . . . . . . .13
Table 11. Aging_offset - crystal aging offset register
Table 12. Frequency correction at 25 ×C, typical . . . . . .14
Table 13. RAM_addr_MSB - RAM address MSB
Table 14. RAM_addr_LSB - RAM address LSB
Table 15. RAM_wrt_cmd - RAM write command
Table 16. RAM_rd_cmd - RAM read command
Table 17. Power management control bit description . . .16
Table 18. Output pin BBS. . . . . . . . . . . . . . . . . . . . . . . . .20
Table 19. Seconds - seconds and clock integrity
Table 20. Seconds coded in BCD format . . . . . . . . . . . .28
Table 21. Minutes - minutes register (address 04h)
Table 22. Hours - hours register (address 05h)
Table 23. Days - days register (address 06h)
Table 24. Weekdays - weekdays register
Table 25. Weekday assignments . . . . . . . . . . . . . . . . . . .29
Table 26. Months - months register (address 08h)
Table 27. Month assignments in BCD format . . . . . . . . . .30
Table 28. Years - years register (address 09h)
Table 29. Second_alarm - second alarm register
Table 30. Minute_alarm - minute alarm register
Table 31. Hour_alarm - hour alarm register
Table 32. Day_alarm - day rearm register
Table 33. Weekday_alarm - weekday alarm register
Table 34. Watchdg_tim_ctl - watchdog timer control
PCF2127A_1
Product data sheet
(address 00h) bit description . . . . . . . . . . . . . . .9
(address 01h) bit description . . . . . . . . . . . . . .10
(address 0Fh) bit description . . . . . . . . . . . . . . 11
(address 03h) bit description . . . . . . . . . . . . . .12
(address 19h) bit description . . . . . . . . . . . . . .14
register (address 1Ah) bit description . . . . . . . .15
register (address 1Bh) bit description . . . . . . . .15
register (address 1Ch) bit description. . . . . . . .15
Ordering information . . . . . . . . . . . . . . . . . . . . . .2
Marking codes . . . . . . . . . . . . . . . . . . . . . . . . . .2
Pin description of PCF2127A . . . . . . . . . . . . . .4
Register overview . . . . . . . . . . . . . . . . . . . . . . .7
Control_1 - control and status register 1
Control_2 - control and status register 2
Control_3 - control and status register 3
CLKOUT_ctl - CLKOUT control register
Temperature measurement period . . . . . . . . . .12
register (address 1Dh) bit description. . . . . . . .15
register (address 03h) bit description . . . . . . . .28
bit description . . . . . . . . . . . . . . . . . . . . . . . . . .28
bit description . . . . . . . . . . . . . . . . . . . . . . . . .29
bit description . . . . . . . . . . . . . . . . . . . . . . . . . .29
(address 07h) bit description . . . . . . . . . . . . . .29
bit description . . . . . . . . . . . . . . . . . . . . . . . . . .30
bit description . . . . . . . . . . . . . . . . . . . . . . . . . .30
(address 0Ah) bit description . . . . . . . . . . . . . .33
(address 0Bh) bit description . . . . . . . . . . . . . .33
(address 0Ch) bit description . . . . . . . . . . . . . .33
(address 0Dh) bit description . . . . . . . . . . . . . .34
(address 0Eh) bit description . . . . . . . . . . . . . .34
register (address 10h) bit description . . . . . . .35
Rev. 01 — 21 January 2010
Table 35. Watchdg_tim_val - watchdog timer value
Table 36. Programmable watchdog or countdown
Table 37. Specification of t
Table 38. First period delay for timer counter . . . . . . . . . 39
Table 39. Flag location in register Control_2 . . . . . . . . . . 40
Table 40. Example values in register Control_2 . . . . . . . 40
Table 41. Example to clear only CDTF (bit 3) in
Table 42. Example to clear only AF (bit 4) in
Table 43. Example to clear only MSF (bit 7) in
Table 44. Example to clear both CDTF and MSF in
Table 45. Timestp_ctl - timestamp control register
Table 46. Sec_timestp - second timestamp register
Table 47. Min_timestp - minute timestamp register
Table 48. Hour_timestp - hour timestamp register
Table 49. Day_timestp - day timestamp register
Table 50. Mon_timestp - month timestamp register
Table 51. Year_timestp - year timestamp register
Table 52. Battery switch-over and timestamp . . . . . . . . . 44
Table 53. Effect of bits MI and SI on pin INT and
Table 54. INT operation (bit TI_TP = 1) . . . . . . . . . . . . . . 47
Table 55. First increment of time circuits after stop
Table 56. Interface selection input pin IFS. . . . . . . . . . . . 53
Table 57. Serial interface . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 58. Command byte definition . . . . . . . . . . . . . . . . . 55
Table 59. I
Table 60. Limiting values . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 61. Static characteristics . . . . . . . . . . . . . . . . . . . . 63
Table 62. Frequency characteristics . . . . . . . . . . . . . . . . 67
Table 63. SPI-bus characteristics . . . . . . . . . . . . . . . . . . 68
Table 64. I
Table 65. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 66. Revision history . . . . . . . . . . . . . . . . . . . . . . . . 74
register (address 11h) bit description . . . . . . . . 36
timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
register Control_2 . . . . . . . . . . . . . . . . . . . . . . 40
register Control_2 . . . . . . . . . . . . . . . . . . . . . . 40
register Control_2 . . . . . . . . . . . . . . . . . . . . . . 40
register Control_2 . . . . . . . . . . . . . . . . . . . . . . 40
(address 12h) bit description . . . . . . . . . . . . . . 42
(address 13h) bit description . . . . . . . . . . . . . . 42
(address 14h) bit description . . . . . . . . . . . . . . 42
(address 15h) bit description . . . . . . . . . . . . . . 43
(address 16h) bit description . . . . . . . . . . . . . . 43
(address 17h) bit description . . . . . . . . . . . . . . 43
(address 18h) bit description . . . . . . . . . . . . . . 43
bit MSF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
2
2
Integrated RTC, TCXO and quartz crystal
C slave address byte . . . . . . . . . . . . . . . . . . . 58
C-bus characteristics . . . . . . . . . . . . . . . . . . . 70
w(rst)
. . . . . . . . . . . . . . . . . . . . 37
PCF2127A
© NXP B.V. 2010. All rights reserved.
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