PCF85063ATLSLASH1 datasheet(25/55 Pages) NXP

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NXP Semiconductors

PCF85063A

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

The generation of interrupts from the alarm function is controlled via bit AIE. If bit AIE is enabled, the INT pin

follows the condition of bit AF. AF remains set until cleared by command. Once AF has been cleared, it will only

be set again when the time increments to match the alarm condition once more. Alarm registers which have

their AEN_x bit at logic 1 are ignored.

aaa-004433

SECOND ALARM

SECOND TIME

AEN_S

AEN_S = 1

example

MINUTE ALARM

MINUTE TIME

AEN_M

HOUR ALARM

HOUR TIME

AEN_H

set alarm flag AF (1)

DAY ALARM

DAY TIME

AEN_D

WEEKDAY ALARM

WEEKDAY TIME

AEN_W

check now signal

1. Only when all enabled alarm settings are matching.

It is only on increment to a matched case that the alarm flag is set.

Figure 16. Alarm function block diagram

7.6 Timer registers

The 8-bit countdown timer at address 10h is controlled by the register Timer_mode at address 11h.

7.6.1 Register Timer_value

Bit

Symbol

Value

Description

7 to 0

T[7:0]

0h[1] to

FFh

countdown timer value[2]

Table 33. Timer_value - timer value register (address 10h) bit description

[1]

Default value.

[2]

Countdown period in seconds:

where T is the countdown value.

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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