Rainbow-electronics DS1375 Bedienungsanleitung PDF herunterladen (Seite 1)

General Description

The DS1375 digital real-time clock (RTC) is a low-power

clock/calendar that does not require a crystal. The

device operates from a digital clock input pin at one of

four frequencies: 32.768kHz, 8.192kHz, 60Hz, or 50Hz.

It maintains seconds, minutes, hours, day, date, month,

and year information. The date at the end of the month

is automatically adjusted for months with fewer than 31

days, including corrections for leap year. The clock

operates in either the 24-hour or 12-hour format with an

AM/PM indicator. Two programmable time-of-day/date

alarms, a programmable square-wave output, and 16

bytes of SRAM are provided. Address and data are

transferred serially through a 2-wire bidirectional bus.

Applications

RTC Complement to the DS32kHz TCXO

Utility Meters

Appliances

Consumer Electronics

Automotive

Features

♦ RTC Counts Seconds, Minutes, Hours, Day, Date,

Month, and Year with Leap-Year Compensation

Valid Up to 2100

♦ Two Programmable Alarms

♦ Programmable Square-Wave Output

♦ Operates from a 32.768kHz, 8.192kHz, 60Hz, or

50Hz Digital Clock Signal

♦ 16 Bytes of SRAM

♦ Fast (400kHz) 2-Wire Interface

♦ 1.7V to 5.5V Operation

DS1375

2-Wire Digital Input RTC with Alarm

______________________________________________ Maxim Integrated Products 1

TOP VIEW

DS1375

SQW/INT

SDAGND

16V

5 SCL

CLK

THIN QFN

Pin Configuration

Ordering Information

DS1375

SCL CLK

SCA

GND

CPU

+3V

RPU RPU

RPU = t

INT

DS32kHz

BAT

GND

SQWINT

Typical Operating Circuit

Rev 0; 4/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE TOP MARK

DS1375 -40°C to +85°C 6 Thin QFN DS1375

1 2 3 4 5 6 ... 10 11

Inhaltsverzeichnis

Seite 1 - Rev 0; 4/03

General DescriptionThe DS1375 digital real-time clock (RTC) is a low-powerclock/calendar that does not require a crystal. Thedevice operates from a di

Seite 2 - ABSOLUTE MAXIMUM RATINGS

DS1375tion is transferred byte-wise and each receiveracknowledges with a ninth bit. Acknowledge: Each receiving device, whenaddressed, is obliged to g

Seite 3 - AC ELECTRICAL CHARACTERISTICS

DS13752-Wire Digital Input RTC with AlarmMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim

Seite 4 - DS1375 toc02

DS13752-Wire Digital Input RTC with Alarm2 _____________________________________________________________________ABSOLUTE MAXIMUM RATINGSRECOMMENDED DC

Seite 5 - Address Map

DS13752-Wire Digital Input RTC with Alarm_____________________________________________________________________ 3Note 8: After this period, the first c

Seite 6 - Clock and Calendar

ICCS vs. VCCDS1375 toc01VCC (V)SUPPlY CURRENT (nA)5.24.74.23.73.22.72.2100150200250300501.7ICCA vs. VCCSUPPLY CURRENT (µA)1020304050607080901000DS1375

Seite 7 - Special Purpose Registers

DS13752-Wire Digital Input RTC with Alarm_____________________________________________________________________ 5ICCS vs. TEMPERATUREDS1375 toc03TEMPER

Seite 8 - Control Register (0Eh)

to location 00h, the current time is transferred to a sec-ond set of registers. The time information is read fromthese secondary registers, while the

Seite 9 - 2-Wire Serial Data Bus

DS13752-Wire Digital Input RTC with Alarm_____________________________________________________________________ 7Table 2. Alarm Mask BitsALARM 1 REGIST

Seite 10 - <RW>

Control Register (0Eh)Bit 7/Enable Clock (ECLK). When ECLK is set to logic1, the CLK input pin is enabled to clock the internaldivider chain and advan

Seite 11 - Package Information

Status Register (0Fh)Bit 1/Alarm 2 Flag (A2F). A logic 1 in the alarm 2 flagbit indicates that the time matched the alarm 2 regis-ters. If the A2IE bi