PCF2127TSLASH2Y datasheet(97/100 Pages) PHILIPS

97 / 100 page

PCF2127

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Product data sheet

Rev. 8 — 19 December 2014

97 of 100

NXP Semiconductors

PCF2127

Accurate RTC with integrated quartz crystal for industrial applications

Table 68. Timestp_ctl - timestamp control register (address

12h) bit description . . . . . . . . . . . . . . . . . . . . . .50

Table 69. Sec_timestp - second timestamp register

(address 13h) bit allocation . . . . . . . . . . . . . . .50

Table 70. Sec_timestp - second timestamp register

(address 13h) bit description . . . . . . . . . . . . . .50

Table 71. Min_timestp - minute timestamp register (address

14h) bit allocation . . . . . . . . . . . . . . . . . . . . . .51

Table 72. Min_timestp - minute timestamp register (address

14h) bit description . . . . . . . . . . . . . . . . . . . . .51

Table 73. Hour_timestp - hour timestamp register (address

15h) bit allocation . . . . . . . . . . . . . . . . . . . . . .51

Table 74. Hour_timestp - hour timestamp register (address

15h) bit description . . . . . . . . . . . . . . . . . . . . . .51

Table 75. Day_timestp - day timestamp register (address

16h) bit allocation . . . . . . . . . . . . . . . . . . . . . .52

Table 76. Day_timestp - day timestamp register (address

16h) bit description . . . . . . . . . . . . . . . . . . . . . .52

Table 77. Mon_timestp - month timestamp register (address

17h) bit allocation . . . . . . . . . . . . . . . . . . . . . .52

Table 78. Mon_timestp - month timestamp register (address

17h) bit description . . . . . . . . . . . . . . . . . . . . . .52

Table 79. Year_timestp - year timestamp register (address

18h) bit allocation . . . . . . . . . . . . . . . . . . . . . .52

Table 80. Year_timestp - year timestamp register (address

18h) bit description . . . . . . . . . . . . . . . . . . . . . .52

Table 81. Battery switch-over and timestamp. . . . . . . . . .53

Table 82. Effect of bits MI and SI on pin INT and bit MSF 55

Table 83. INT operation (bit TI_TP = 1) . . . . . . . . . . . . . .57

Table 84. First increment of time circuits after stop

release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Table 85. Interface selection input pin IFS . . . . . . . . . . . .62

Table 86. Serial interface . . . . . . . . . . . . . . . . . . . . . . . . .63

Table 87. Command byte definition . . . . . . . . . . . . . . . . .63

Table 88. I2C slave address byte . . . . . . . . . . . . . . . . . . .68

Table 89. Limiting values . . . . . . . . . . . . . . . . . . . . . . . . .72

Table 90. Static characteristics . . . . . . . . . . . . . . . . . . . .73

Table 91. Frequency characteristics . . . . . . . . . . . . . . . .78

Table 92. SPI-bus characteristics . . . . . . . . . . . . . . . . . . .80

Table 93. I2C-bus characteristics . . . . . . . . . . . . . . . . . . .82

Table 94. Selection of Real-Time Clocks . . . . . . . . . . . . .89

Table 95. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . .91

Table 96. Revision history . . . . . . . . . . . . . . . . . . . . . . . .93

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