PCF2129AT datasheet(83/86 Pages) PHILIPS

83 / 86 page

PCF2129

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Product data sheet

Rev. 7 — 19 December 2014

83 of 86

NXP Semiconductors

PCF2129

Accurate RTC with integrated quartz crystal for industrial applications

Table 66. Day_timestp - day timestamp register

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

Table 67. Mon_timestp - month timestamp register

(address 17h) bit allocation . . . . . . . . . . . . . . .43

Table 68. Mon_timestp - month timestamp register

(address 17h) bit description . . . . . . . . . . . . . .43

Table 69. Year_timestp - year timestamp register

(address 18h) bit allocation . . . . . . . . . . . . . . .43

Table 70. Year_timestp - year timestamp register

(address 18h) bit description . . . . . . . . . . . . . .43

Table 71. Battery switch-over and timestamp. . . . . . . . . .44

Table 72. Effect of bits MI and SI on pin INT and

bit MSF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Table 73. First increment of time circuits after

stop release . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Table 74. Interface selection input pin IFS . . . . . . . . . . . .51

Table 75. Serial interface . . . . . . . . . . . . . . . . . . . . . . . . .52

Table 76. Command byte definition . . . . . . . . . . . . . . . . .52

Table 77. I2C slave address byte . . . . . . . . . . . . . . . . . . .56

Table 78. Limiting values . . . . . . . . . . . . . . . . . . . . . . . . .58

Table 79. Static characteristics . . . . . . . . . . . . . . . . . . . .59

Table 80. Frequency characteristics . . . . . . . . . . . . . . . .64

Table 81. SPI-bus characteristics . . . . . . . . . . . . . . . . . .66

Table 82. I2C-bus characteristics . . . . . . . . . . . . . . . . . . .68

Table 83. Selection of Real-Time Clocks . . . . . . . . . . . . .75

Table 84. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . .77

Table 85. Revision history . . . . . . . . . . . . . . . . . . . . . . . .79

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