PCF8523TSSLASH1 datasheet(25/75 Pages) NXP

номер детали	PCF8523TS/1

подробное описание детали	Real-Time Clock (RTC) and calendar

PDF	75 Pages

Scroll/Zoom	100%

производитель	NXP [NXP Semiconductors]

домашняя страница	http://www.nxp.com

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PCF8523

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

Product data sheet

Rev. 4 — 5 July 2012

25 of 74

NXP Semiconductors

PCF8523

Real-Time Clock (RTC) and calendar

8.7.3 Register Day_alarm

[1]

Default value.

8.7.4 Register Weekday_alarm

[1]

Default value.

8.7.5 Alarm flag

Table 24.

Day_alarm - day alarm register (address 0Ch) bit description

Bit

Symbol

Value

Place value Description

AE_D

day alarm is enabled

1[1]

day alarm is disabled

unused

5 to 4

DAY_ALARM

0 to 3

ten’s place

day alarm information coded in

BCD format

3 to 0

0 to 9

unit place

Table 25.

Weekday_alarm - weekday alarm register (address 0Dh) bit description

Bit

Symbol

Value

Description

AE_W

weekday alarm is enabled

1[1]

weekday alarm is disabled

6 to 3

unused

2 to 0

WEEKDAY_ALARM

0 to 6

weekday alarm information

(1) Only when all enabled alarm settings are matching.

It is only on increment to a matched case that the alarm flag is set, see Section 8.7.5.

Fig 15. Alarm function block diagram

013aaa088

WEEKDAY ALARM

AE_W

WEEKDAY TIME

DAY ALARM

AE_D

DAY TIME

HOUR ALARM

AE_H

HOUR TIME

MINUTE ALARM

AE_M

MINUTE TIME

check now signal

set alarm flag AF (1)

AE_M = 1

example

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