PCF85263ATLSLASHA datasheet(35/100 Pages) NXP

35 / 100 page

PCF85263A

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Product data sheet

Rev. 4.1 — 27 November 2015

35 of 100

NXP Semiconductors

PCF85263A

Tiny RTC with alarm, battery switch-over, and I2C-bus

The correction is made by adding or subtracting clock correction pulses, thereby changing

the period of a single second but not by changing the oscillator frequency.

It is possible to monitor when correction pulses are applied. See Section 8.8.4.

8.8.1 Correction when OFFM = 0

The correction is triggered once every four hours and then correction pulses are applied

once per minute until the programmed correction values have been implemented.

8.8.2 Correction when OFFM = 1

The correction is triggered once every eight minutes and then correction pulses are

applied once per second until the programmed correction values have been implemented.

Clock correction is made more frequently in OFFM = 1; however, this can result in higher

power consumption.

Table 26.

Correction pulses for OFFM = 0

Correction value

Every nth hour

Actual minute

+1 or

14

+2 or

2

00 and 01

+3 or

3

00, 01, and 02

+59 or

59

00 to 58

+60 or

60

00 to 59

+61 or

61

00 to 59

4+1

+62 or

62

00 to 59

4 + 1

00 and 01

+123 or

123

00 to 59

4 + 1

00 to 59

4 + 2

00, 01, and 02

128

00 to 59

4 + 1

00 to 59

4 + 2

00 to 07

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