PCF85063ATTSLASHAJ datasheet(23/55 Pages) NXP

23 / 55 page

NXP Semiconductors

PCF85063A

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

7. Read Hours

8. Read Days

9. Read Weekdays

10. Read Months

11. Read Years

12. Send a STOP condition

7.5 Alarm registers

7.5.1 Register Second_alarm

Bit

Symbol

Value

Place value

Description

second alarm

enabled

AEN_S

1[1]

disabled

6 to 4

0[1] to 5

ten’s place

3 to 0

SECOND_ALARM

0[1] to 9

unit place

second alarm information coded in BCD

format

Table 28. Second_alarm - second alarm register (address 0Bh) bit description

[1]

Default value.

7.5.2 Register Minute_alarm

Bit

Symbol

Value

Place value

Description

minute alarm

enabled

AEN_M

1[1]

disabled

6 to 4

0[1] to 5

ten’s place

3 to 0

MINUTE_ALARM

0[1] to 9

unit place

minute alarm information coded in BCD

format

Table 29. Minute_alarm - minute alarm register (address 0Ch) bit description

[1]

Default value.

7.5.3 Register Hour_alarm

Bit

Symbol

Value

Place value

Description

hour alarm

enabled

AEN_H

1[1]

disabled

unused

12-hour mode[2]

AM/PM indicator

0[1]

AMPM

Table 30. Hour_alarm - hour alarm register (address 0Dh) bit description

PCF85063A

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

Product data sheet

Rev. 7.1 — 8 November 2023

23 / 55

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