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PCF8523TK Datasheet(PDF) 10 Page - NXP Semiconductors

Part # PCF8523TK
Description  Real-Time Clock (RTC) and calendar
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8523TK Datasheet(HTML) 10 Page - NXP Semiconductors

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PCF8523
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 5 July 2012
10 of 74
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
8.2.2 Register Control_2
[1]
Default value.
Table 8.
Control_2 - control and status register 2 (address 01h) bit description
Bit
Symbol
Value
Description
7WTAF
0[1]
no watchdog timer A interrupt generated
1
flag set when watchdog timer A interrupt
generated; flag is read-only and cleared by
reading register Control_2
6CTAF
0[1]
no countdown timer A interrupt generated
1
flag set when countdown timer A interrupt
generated; flag must be cleared to clear
interrupt
5CTBF
0[1]
no countdown timer B interrupt generated
1
flag set when countdown timer B interrupt
generated; flag must be cleared to clear
interrupt
4SF
0[1]
no second interrupt generated
1
flag set when second interrupt generated; flag
must be cleared to clear interrupt
3AF
0[1]
no alarm interrupt generated
1
flag set when alarm triggered; flag must be
cleared to clear interrupt
2WTAIE
0[1]
watchdog timer A interrupt is disabled
1
watchdog timer A interrupt is enabled
1CTAIE
0[1]
countdown timer A interrupt is disabled
1
countdown timer A interrupt is enabled
0CTBIE
0[1]
countdown timer B interrupt is disabled
1
countdown timer B interrupt is enabled


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