pcf2123 NXP Semiconductors, pcf2123 Datasheet - Page 30

• Manufacturer Part Number: pcf2123
• Description: Spi Real Time Clock/calendar
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF2123_1
Product data sheet
Table 38.
[1]
[2]
It is possible to monitor when correction pulses are applied. The correction interrupt
enable mode (bit CIE) will generate a
applied. In the case where multiple correction pulses are applied, a
pulse will be generated and repeated every
Correction is applied to the 1 Hz clock. Any timer or clock output using a frequency of 1 Hz
or below will also be affected by the correction pulses.
Correction value
+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
Example is given in a time range from 2:00 to 2:59.
Correction INT pulses are
Correction pulses for course mode
Rev. 01 — 19 November 2008
1
128
s wide. For multiple pulses they are repeated at
Hour:Minute
02:00
02:01 to
02:59
02:00
02:01
02:02 to
02:59
02:00
02:01
02:02
02:03 to
02:59
:
02:00 to
02:58
02:59
02:00 to
02:59
02:00 to
02:58
02:59
02:00 to
02:58
02:59
02:00 to
02:58
02:59
02:00 to
02:58
02:59
1
128
[1]
second pulse on INT for every correction
1
64
seconds.
SPI Real time clock/calendar
Correction pulses on INT per
minute
1
0
1
1
0
1
1
1
0
:
1
0
1
1
2
1
3
1
4
1
5
[2]
1
1
64
128
PCF2123
s interval.
© NXP B.V. 2008. All rights reserved.
second interrupt
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