PCA8565TS datasheet(9/39 Pages) NXP

9 / 39 page

PCA8565_2

Product data sheet

Rev. 02 — 16 June 2009

9 of 39

NXP Semiconductors

PCA8565

Real time clock/calendar

[1]

Values shown in decimal.

[1]

Values shown in decimal.

[1]

The PCA8565 compensates for leap years by adding a 29th day to February if the year counter contains a

value which is exactly divisible by 4, including the year 00.

[2]

Values shown in decimal.

[1]

Values shown in decimal.

Table 9.

Seconds coded in BCD format

Seconds value in

decimal

Upper-digit (ten’s place)

Digit (unit place)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0000000

0000001

0000010

0001001

0010000

1011000

1011001

Table 10.

Bit

Symbol

Value

Place value Description

unused

6 to 4 MINUTES

0 to 5[1]

ten’s place

actual minutes coded in BCD format

3 to 0

0 to 9[1]

unit place

Table 11.

Bit

Symbol

Value

Place value Description

7 to 6 -

unused

5 to 4 HOURS

0 to 2[1]

ten’s place

actual hours coded in BCD format

3 to 0

0 to 9[1]

unit place

Table 12.

Bit

Symbol

Value

Place value Description

7 to 6 -

unused

5to4 DAYS[1]

0to3[2]

ten’s place

actual day coded in BCD format

3 to 0

0 to 9[2]

unit place

Table 13.

Bit

Symbol

Value

Description

7 to 3 -

unused

2 to 0 WEEKDAYS

0 to 6[1]

actual weekday values, see Table 14

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