Datasheet > X1243

X1243

更新时间： 2022-11-27 07:37:05

品牌	Logo	应用领域
XICOR		闹钟可编程只读存储器电动程控只读存储器电可擦编程只读存储器时钟
页数	文件大小	规格书
18页	94K
描述
Real Time Clock/Calendar/Alarm with EEPROM

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数据手册

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X1243 数据手册

X1243

disables the output IRQ for that alarm condition, but the

alarm condition can still be checked by polling the

alarm flag.

The alarm enable bits are located in the MSB of the

particular register. When all enable bits are set to ‘0’,

there are no alarms.

Table 1. Clock/Control Memory Map

Bit

Reg

Name

Addr.

Type

Range

(optional)

003F

0037

0036

0035

0034

0033

0032

0031

0030

0011

0010

000F

000E

000D

000C

000B

000A

0009

0008

0007

0006

0005

0004

0003

0002

0001

0000

Status

Y2K

BAT

AL1

AL0

Y2K21

Y2K20

Y2K13

RWEL

WEL

RTCF

Y2K10 19/20

DY2

Y12

G12

D12

H12

M12

S12

DY1

Y11

G11

D11

H11

M11

S11

DY0

Y10

G10

D10

H10

M10

S10

0-6

Y23

Y22

Y21

Y20

G20

D20

H20

M20

S20

Y13

G13

D13

H13

M13

S13

0-99

1-12

1-31

0-23

0-59

RTC

(SRAM)

D21

H21

M21

S21

AL0E

BP0

T24

M22

S22

AL1E

BP1

INT

BP2

00h

Control

(E2PROM)

unused

DWA1 EDW1

YRA1

DY2

DY1

DY0

0-6

Unused - Default = RTC Year value

MOA1

DTA1

HRA1

MNA1

SCA1

EMO1

EDT1

EHR1

EMN1

ESC1

A1G20

A1D20

A1H20

A1M20

A1S20

A1G13

A1D13

A1H13

A1G12

A1D12

A1H12

A1G11

A1D11

A1H11

A1G10

A1D10

A1H10

A1M10

A1S10

1-12 0h

1-31 0h

0-23 0h

0-59 0h

Alarm1

(E2PROM)

A1D21

A1H21

A1M21

A1S21

A1M22

A1S22

A1M13 A1M12 A1M11

A1S13

unused

A1S12

DY2

A1S11

DY1

DWA1 EDW0

YRA0

DY0

0-6

Unused - Default = RTC Year value

MOA0

DTA0

HRA0

MNA0

SCA0

EMO0

EDT0

EHR0

EMN0

ESC0

A0G20

A0D20

A0H20

A0M20

A0S20

A0G13

A0D13

A0H13

A0G12

A0D12

A0H12

A0G11

A0D11

A0H11

A0G10

A0D10

A0H10

A0M10

A0S10

1-12 0h

1-31 0h

0-23 0h

0-59 0h

Alarm0

(E2PROM)

A0D21

A0H21

A0M21

A0S21

A0M22

A0S22

A0M13 A0M12 A0M11

A0S13 A0S12 A0S11

REAL TIME CLOCK REGISTERS

Year 2000 (Y2K)

Day of the Week Register (DW)

This register provides a Day of the Week status and

uses three bits DY2 to DY0 to represent the seven

days of the week. The counter advances in the cycle

0-1-2-3-4-5-6-0-1-2-... The assignment of a numerical

The X1243 has a century byte that “rolls over” from 19

to 20 when the years byte changes from 99 to 00. The

Y2K byte can contain only the values of 19 or 20.

1 2 345 6 7...18

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