PCF2127ATSLASH1 datasheet(7/80 Pages) NXP

7 / 80 page

PCF2127A_2

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

Product data sheet

Rev. 02 — 7 May 2010

7 of 80

NXP Semiconductors

PCF2127A

Integrated RTC, TCXO and quartz crystal

• Address registers 1Ah and 1Bh define the RAM address. Address register 1Ch

(RAM_wrt_cmd) is the RAM write command; address register 1Dh (RAM_rd_cmd) is

the RAM read command. Data is transferred to or from the RAM via the serial

interface (see Section 8.5).

• The registers Seconds, Minutes, Hours, Days, Months, and Years are all coded in

Binary Coded Decimal (BCD) format to simplify application use. Other registers are

either bit-wise or standard binary.

When one of the RTC registers is written or read, the content of all counters is temporarily

frozen. This prevents a faulty writing or reading of the clock and calendar during a carry

condition (see Section 8.9.8).

Table 4.

Bit positions labeled as - are not implemented and will return a 0 when read. Bit T must always be written with logic 0. Bits

labeled as X are undefined at power-on and unchanged by subsequent resets.

Address Register name

Bit

Reset value

Control registers

00h

Control_1

EXT_

TEST

TSTOP

TSF1

POR_

OVRD

12_24

0000 0000

01h

Control_2

MSF

WDTF

TSF2

CDTF

TSIE

AIE

CDTIE

0000 0000

02h

Control_3

PWRMNG[2:0]

BTSE

BLF

BIE

BLIE

0000 0000

Time and date registers

03h

Seconds

OSF

SECONDS (0 to 59)

1XXX XXXX

04h

Minutes

MINUTES (0 to 59)

- XXX XXXX

05h

Hours

AMPM

HOURS (1 to 12) in 12 h mode

- - XX XXXX

HOURS (0 to 23) in 24 h mode

- - XX XXXX

06h

Days

DAYS (1 to 31)

- - XX XXXX

07h

Weekdays

-----

WEEKDAYS (0 to 6)

- - - - - XXX

08h

Months

MONTHS (1 to 12)

- - - X XXXX

09h

Years

YEARS (0 to 99)

XXXX XXXX

Alarm registers

0Ah

Second_alarm

AE_S

SECOND_ALARM (0 to 59)

1XXX XXXX

0Bh

Minute_alarm

AE_M

MINUTE_ALARM (0 to 59)

1XXX XXXX

0Ch

Hour_alarm

AE_H

AMPM

HOUR_ALARM (1 to 12) in 12 h mode

1 - XX XXXX

HOUR_ALARM (0 to 23) in 24 h mode

1 - XX XXXX

0Dh

Day_alarm

AE_D

DAY_ALARM (1 to 31)

1 - XX XXXX

0Eh

Weekday_alarm

AE_W

----

WEEKDAY_ALARM (0 to 6) 1 - - - - XXX

CLKOUT control register

0Fh

CLKOUT_ctl

TCR[1:0]

---COF[2:0]

00 - - - 000

Watchdog registers

10h

Watchdg_tim_ctl

WD_CD[1:0]

TI_TP

TF[1:0]

000 - - - 11

11h

Watchdg_tim_val WATCHDG_TIM_VAL[7:0]

XXXX XXXX

Timestamp registers

12h

Timestp_ctl

TSM

TSOFF

1_O_16_TIMESTP[4:0]

00 - X XXXX

13h

Sec_timestp

SECOND_TIMESTP (0 to 59)

- XXX XXXX

PCF2127AT/1 bảng dữ liệu(PDF) 7 Page - NXP Semiconductors

PCF2127AT/1 bảng dữ liệu(HTML) 7 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

bảng dữ liệu tải về

Link URL