pcf8523u/12aa/1 NXP Semiconductors, pcf8523u/12aa/1 Datasheet - Page 27

• Manufacturer Part Number: pcf8523u/12aa/1
• Description: Pcf8523 Real-time Clock Rtc And Calendar
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF8523
Product data sheet
8.7.6 Alarm interrupts
Generation of interrupts from the alarm function is controlled via the bit AIE (register
Control_1). If AIE is enabled, the INT1 will follow the status of bit AF (register Control_2).
Clearing AF will immediately clear INT1. No pulse generation is possible for alarm
interrupts.
Fig 17. AF timing
Example where only the minute alarm is used and no other interrupts are enabled.
minute counter
All information provided in this document is subject to legal disclaimers.
minute alarm
instruction
INT1
SCL
Rev. 2 — 27 January 2011
AF
44
45
45
CLEAR INSTRUCTION
Real-Time Clock (RTC) and calendar
013aaa335
PCF8523
© NXP B.V. 2011. All rights reserved.
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