Datasheet

PCF85063TP All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 11 July 2013 14 of 47
NXP Semiconductors
PCF85063TP
Tiny Real-Time Clock/calendar
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.
Clock correction is made more frequently in MODE = 1; however, this can result in higher
power consumption.
[1] The correction pulses on pin INT are
1
⁄
1024
s wide. For multiple pulses, they are repeated at an interval of
1
⁄
512
s.
In MODE = 1, any timer source clock using a frequency below 1.024 kHz is also affected
by the clock correction (see Table 17
).
Table 16. Correction pulses for MODE = 1
Correction value Update every n
th
minute
Second Correction pulses on
INT
per second
[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 58 1
2592
+62 or 62 2 00 to 58 1
2593
+63 or 63 2 00 to 58 1
2594
64 2 00 to 58 1
2595
Table 17. Effect of correction pulses on frequencies for MODE = 1
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 affected
1affected
1
⁄
60
affected