PCF85063BTL All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 6 — 18 November 2015 16 of 58
NXP Semiconductors
PCF85063BTL
Tiny Real-Time Clock/calendar with alarm function and SPI-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
).
8.2.3.2 Correction when MODE = 1
The correction is triggered once every four minutes and then correction pulses are applied
once per second up to a maximum of 60 pulses. When correction values greater than 60
pulses are used, additional correction pulses are made in the 59
th
second.
Table 14. Correction pulses for MODE = 0
Correction value Update every n
th
hour Minute Correction pulses on
INT
per minute
[1]
+1 or 12 00 1
+2 or 2 2 00 and 01 1
+3 or 3 2 00, 01, and 02 1
::::
+59 or 59 2 00 to 58 1
+60 or 60 2 00 to 59 1
+61 or 61 2 00 to 59 1
2nd and next hour 00 1
+62 or 62 2 00 to 59 1
2nd and next hour 00 and 01 1
+63 or 63 02 00 to 59 1
2nd and next hour 00, 01, and 02 1
64 02 00 to 59 1
2nd and next hour 00, 01, 02, and 03 1
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
64 no effect
1affected
1
⁄
60
affected
