PCF8593T 데이터 시트보기 (PDF) - NXP Semiconductors.

부품명

상세내역

제조사

PCF8593T

Real-time clock/calendar

NXP Semiconductors. 

NXP Semiconductors

PCF8593

Low power clock and calendar

7.4 Counter registers

The format for 24 hour or 12 hour clock modes can be selected by setting the most

significant bit of the hours counter register. The format of the hours counter is shown in

Figure 5.

MSB

LSB

7 6 54 3 21 0

013aaa383

memory location 04h (hours counter)

hours in BCD format:

unit place

ten's place (0 to 2 binary)

AM/PM flag:

logic 0: AM

logic 1: PM

format:

logic 0: 24 hour format, AM/PM flag remains unchanged

logic 1: 12 h format, AM/PM flag will be updated

Fig 5. Format of the hours counter

The year and date are stored in memory location 05h (see Figure 6). The weekdays and

months are in memory location 06h (see Figure 7).

MSB

7 65

432

LSB

10

013aaa384

Fig 6. Format of the year and date counter

memory location 05h (year/date)

days in BCD format:

unit place

ten's place (0 to 3 binary)

year (0 to 3 binary, read as logic 0

if the mask flag is set)

MSB

LSB

76 543 210

013aaa385

memory location 06h (weekdays/months)

months in BCD format:

unit place

ten's place

weekdays (0 to 6 binary, read as logic 0

if the mask flag is set)

Fig 7. Format of the weekdays and month counter

When reading these memory locations the year and weekdays are masked out when the

mask flag of the control and status register is set. This allows the user to read the date

and month count directly.

PCF8593

Product data sheet

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

Rev. 04 — 6 October 2010

© NXP B.V. 2010. All rights reserved.

6 of 35

Share Link: