PCF8564A datasheet(18/65 Pages) NXP

18 / 65 page

PCF85063A

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Product data sheet

Rev. 7 — 30 March 2018

18 of 65

NXP Semiconductors

PCF85063A

Tiny Real-Time Clock/calendar with alarm function and I2C-bus

8.2.3.1

Correction when MODE = 0

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

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

[1]

The correction pulses on pin INT are 1⁄64 s wide.

In MODE = 0, any timer or clock output using a frequency below 64 Hz is affected by the

clock correction (see Table 15).

Table 14.

Correction pulses for MODE = 0

Correction value

Update every nth hour Minute

Correction pulses on

INT per minute[1]

+1 or

12

+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

2nd and next hour

+62 or

62

00 to 59

2nd and next hour

00 and 01

+63 or

63

00 to 59

2nd and next hour

00, 01, and 02

64

00 to 59

2nd and next hour

00, 01, 02, and 03

Table 15.

Effect of correction pulses on frequencies for MODE = 0

Frequency (Hz)

Effect of correction

CLKOUT

32768

no effect

16384

no effect

8192

no effect

4096

no effect

2048

no effect

1024

no effect

1affected

Timer source clock

4096

no effect

1affected

1⁄60

affected

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