PCF85063ATLSLASH1 datasheet(11/55 Pages) NXP

11 / 55 page

NXP Semiconductors

PCF85063A

Tiny Real-Time Clock/calendar with alarm function and I2C-bus

7.2.2.1 Alarm interrupt

aaa-004432

SECONDS COUNTER

MINUTES COUNTER

HMI

HMI MI

AIE

CIE

AIE

example

HMI/MI

SET

CLEAR

from interface:

clear TF

from interface:

clear AF

offset circuit:

add/substract

pulse

from interface:

set CIE

to interface:

read AF

PULSE

GENERATOR 1

TRIGGER

CLEAR

TI_TP

ALARM FLAG

set alarm

flag, AF

SET

CLEAR

PULSE

GENERATOR 3

TRIGGER

CLEAR

COUNTDOWN COUNTER

TIE

TIMER FLAG

SET

CLEAR

to interface:

read TF

PULSE

GENERATOR 2

TRIGGER

CLEAR

INT

Figure 9. Interrupt scheme

AIE

This bit activates or deactivates the generation of an interrupt when AF is asserted, respectively.

When an alarm occurs, AF is set logic 1. This bit maintains its value until overwritten by command. To prevent

one flag being overwritten while clearing another, a logic AND is performed during a write access.

PCF85063A

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

Product data sheet

Rev. 7.1 — 8 November 2023

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