PCF8563TSLASH5 datasheet(11/45 Pages) NXP

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PCF8563

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Product data sheet

Rev. 11 — 26 October 2015

11 of 45

NXP Semiconductors

PCF8563

Real-time clock/calendar

8.4.5 Register Weekdays

[1]

Definition may be re-assigned by the user.

8.4.6 Register Century_months

[1]

This bit may be re-assigned by the user.

[2]

This bit is toggled when the register Years overflows from 99 to 00.

Table 13.

Weekdays - weekdays register (address 06h) bit description

Bit

Symbol

Value

Description

7 to 3 -

unused

2 to 0 WEEKDAYS

0 to 6

actual weekday values, see Table 14

Table 14.

Weekday assignments

Day[1]

Bit

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

110

Table 15.

Century_months - century flag and months register (address 07h) bit description

Bit

Symbol

Value

Place value Description

7C[1]

0[2]

indicates the century is x

indicates the century is x + 1

6 to 5 -

unused

MONTHS

0 to 1

ten’s place

actual month coded in BCD format, see Table 16

3 to 0

0 to 9

unit place

Table 16.

Month assignments in BCD format

Month

Upper-digit

(ten’s place)

Digit (unit place)

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

January

February

March

April

100

May

101

June

110

July

111

August

000

September

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