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PCF85263ATL/AX 数据表(PDF) 34 Page - NXP Semiconductors |
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PCF85263ATL/AX 数据表(HTML) 34 Page - NXP Semiconductors |
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34 / 102 page  NXP Semiconductors PCF85263A Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus OFFSET[7:0] Offset value in ppm Offset value in decimal Normal mode OFFM = 0 Fast mode OFFM = 1 011 1 1110 +126 +273.420 +256.3470 : : : : 0000 0010 +2 +4.340 +4.0690 0000 0001 +1 +2.170 +2.0345 0000 0000 [1] 0 0 [1] 0 [1] 1111 1111 -1 -2.170 -2.0345 1111 1110 -2 -4.340 -4.0690 : : : : 1000 0001 -127 -275.590 -258.3815 1000 0000 -128 -277.760 -260.416 Table 24. Offset values...continued [1] Default value. The correction is made by adding or subtracting clock correction pulses. This operation changes the period of a single second but not by changing the oscillator frequency. It is possible to monitor when correction pulses are applied. For details, see Section 7.8.4. 7.8.1 Correction when OFFM = 0 The correction is triggered once every four hours and then the correction pulses are applied once per minute until the programmed correction values have been implemented. Correction value Every nth hour Actual minute +1 or -1 4 00 +2 or -2 4 00 and 01 +3 or -3 4 00, 01, and 02 : : : +59 or -59 4 00 to 58 +60 or -60 4 00 to 59 4 00 to 59 +61 or -61 4 + 1 00 4 00 to 59 +62 or -62 4 + 1 00 and 01 : : : 4 00 to 59 4 + 1 00 to 59 +123 or -123 4 + 2 00, 01, and 02 Table 25. Correction pulses for OFFM = 0 PCF85263A All information provided in this document is subject to legal disclaimers. © 2025 NXP B.V. All rights reserved. Product data sheet Rev. 5.4 — 12 December 2025 Document feedback 34 / 102 |
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