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PCF8564A 数据表(PDF) 19 Page - NXP Semiconductors

部件名 PCF8564A
功能描述  Tiny Real-Time Clock/calendar with alarm function and I2C-bus
PDF  65 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF8564A 数据表(HTML) 19 Page - NXP Semiconductors

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PCF85063A
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 7 — 30 March 2018
19 of 65
NXP Semiconductors
PCF85063A
Tiny Real-Time Clock/calendar with alarm function and I2C-bus
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 59th 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 nth
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
259
2
+62 or
62
2
00 to 58
1
259
3
+63 or
63
2
00 to 58
1
259
4
64
2
00 to 58
1
259
5
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



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