PC8523-1(2012) 查看數據表（PDF） - NXP Semiconductors.

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PC8523-1
(Rev.:2012)

Real-Time Clock (RTC) and calendar

NXP Semiconductors. 

NXP Semiconductors

PCF8523

Real-Time Clock (RTC) and calendar

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 follows the status of bit AF (register Control_2).

Clearing AF immediately clears INT1. No pulse generation is possible for alarm interrupts.

minute counter 44 45

minute alarm 45

AF

INT1

SCL

instruction

CLEAR INSTRUCTION

013aaa335

Example where only the minute alarm is used and no other interrupts are enabled.

Fig 17. AF timing

PCF8523

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 4 — 5 July 2012

© NXP B.V. 2012. All rights reserved.

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