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PCF8523T/1 数据表(PDF) 29 Page - NXP Semiconductors

部件名 PCF8523T/1
功能描述  Real-Time Clock (RTC) and calendar
PDF  75 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF8523T/1 数据表(HTML) 29 Page - NXP Semiconductors

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PCF8523
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 5 July 2012
29 of 74
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
8.8.1 Correction when MODE = 0
The correction is triggered once per 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 INT1 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 31).
Table 30.
Correction pulses for MODE = 0
Correction value
Hour
Minute
Correction pulses on
INT1 per minute[1]
+1 or
1
02001
+2 or
2
02
00 and 01
1
+3 or
3
02
00, 01, and 02
1
::::
+59 or
59
02
00 to 58
1
+60 or
60
02
00 to 59
1
+61 or
61
02
00 to 59
1
03
00
1
+62 or
62
02
00 to 59
1
03
00 and 01
1
+63 or
63
02
00 to 59
1
03
00, 01, and 02
1
64
02
00 to 59
1
03
00, 01, 02, and 03
1
Table 31.
Effect of clock correction for MODE = 0
CLKOUT frequency (Hz)
Effect of correction
Timer source clock
frequency (Hz)
Effect of
correction
32768
no effect
4096
no effect
16384
no effect
64
no effect
8192
no effect
1
affected
4096
no effect
1⁄60
affected
1024
no effect
1⁄3600
affected
32
affected
-
-
1affected
-
-



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