NXP Semiconductors

PCF85063A

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

Bit

Symbol

Value

Place value

Description

3 to 0

0[2] to 9

unit place

Table 21. Hours - hours register (address 06h) bit description...continued

[1]

Hour mode is set by the 12_24 bit in register Control_1.

[2]

Default value.

7.3.4 Register Days

Bit

Symbol

Value

Place value

Description

7 to 6

-

00

-

unused

5 to 4

0[2] to 3

ten’s place

3 to 0

DAYS[1]

0[3] to 9

unit place

actual day coded in BCD format

Table 22. Days - days register (address 07h) bit description

[1]

If the year counter contains a value, which is exactly divisible by 4 (including the year 00), the PCF85063A compensates for leap years by adding a 29th

day to February.

[2]

Default value.

[3]

Default value is 1.

7.3.5 Register Weekdays

Bit

Symbol

Value

Description

7 to 3

-

0000 0

unused

2 to 0

WEEKDAYS

0 to 6

actual weekday values, see Table 24

Table 23. Weekdays - weekdays register (address 08h) bit description

Bit

Day[1]

2

1

0

Sunday

0

0

0

Monday

0

0

1

Tuesday

0

1

0

Wednesday

0

1

1

Thursday

1

0

0

Friday

1

0

1

Saturday[2]

1

1

0

Table 24. Weekday assignments

[1]

Definition may be reassigned by the user.

[2]

Default value.

7.3.6 Register Months

Bit

Symbol

Value

Place value

Description

7 to 5

-

000

-

unused

Table 25. Months - months register (address 09h) bit description

PCF85063A

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Product data sheet

Rev. 7.1 — 8 November 2023

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