Datasheet

PCF8523 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 17 September 2013 10 of 78
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