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PCF8523 View Datasheet(PDF) - NXP Semiconductors.

Part Name
Description
MFG CO.
PCF8523
NXP
NXP Semiconductors. NXP
'PCF8523' PDF : 74 Pages View PDF
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
Table 30. Correction pulses for MODE = 0
Correction value
Update every nth hour Minute
+1 or 1
+2 or 2
+3 or 3
:
+59 or 59
+60 or 60
+61 or 61
+62 or 62
+63 or 63
64
2
2
2
:
2
2
2
2nd and next hour
2
2nd and next hour
2
2nd and next hour
2
2nd and next hour
00
00 and 01
00, 01, and 02
:
00 to 58
00 to 59
00 to 59
00
00 to 59
00 and 01
00 to 59
00, 01, and 02
00 to 59
00, 01, 02, and 03
Correction pulses on
INT1 per minute[1]
1
1
1
:
1
1
1
1
1
1
1
1
1
1
[1] The correction pulses on pin INT1 are 164 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 31. Effect of clock correction for MODE = 0
CLKOUT frequency (Hz) Effect of correction Timer source clock
frequency (Hz)
32 768
no effect
4 096
16 384
no effect
64
8 192
no effect
1
4 096
1 024
32
no effect
no effect
affected
160
13 600
-
1
affected
-
Effect of
correction
no effect
no effect
affected
affected
affected
-
-
8.8.2 Correction when MODE = 1
The correction is triggered once per minute 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.
PCF8523
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 28 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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