PCF212311 데이터 시트보기 (PDF) - NXP Semiconductors.

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PCF212311

SPI Real time clock/calendar

NXP Semiconductors. 

NXP Semiconductors

PCF2123

SPI Real time clock/calendar

8.4.4 Register Days

Table 12. Days - days register (address 05h) bit description

Bit

Symbol

Value

Place value Description

7 to 6 -

-

-

unused

5 to 4 DAYS[1]

0 to 3

ten’s place actual day coded in BCD format

3 to 0

0 to 9

unit place

[1] The PCF2123 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.

8.4.5 Register Weekdays

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

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

1

1

0

[1] Definition may be re-assigned by the user.

8.4.6 Register Months

Table 15. Months - months register (address 07h) bit description

Bit

Symbol

Value

Place value Description

7 to 5 -

-

-

unused

4

MONTHS

3 to 0

0 to 1

0 to 9

ten’s place actual month coded in BCD

unit place format, see Table 16

PCF2123

Product data sheet

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

Rev. 5 — 27 April 2011

© NXP B.V. 2011. All rights reserved.

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