Rainbow-electronics DS1691 Bedienungsanleitung PDF herunterladen

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FEATURES

Incorporates industry standard DS1287 PC clock

plus enhanced features:

 +3 or +5V operation

 64–bit Silicon serial number

 64–bit customer specific ROM or additional

serial number available

 Power control circuitry supports system

power on from date/time alarm or key closure

 Automatic battery backup and write

protection to external SRAM

 Crystal select bit allows RTC to operate with

6 pF or 12.5 pF crystal

 114 bytes user NV RAM

 Auxiliary battery input

 RAM clear input

 Century register

 32 kHz output for power management

 32–bit V

powered elapsed time counter

 32–bit V

BAT

powered elapsed time counter

 16–bit power cycle counter

 Compatible with existing BIOS for original

DS1287 functions

 Available as IC (DS1688) or stand–alone

module with embedded battery and crystal

(DS1691)

 Timekeeping algorithm includes leap year

compensation valid up to 2100

ORDERING INFORMATION

PART # DESCRIPTION

DS1688S RTC IC, 28–pin SOIC

DS1691 RTC Module; 28–pin DIP

PIN ASSIGNMENT

PIN DESCRIPTION

X1 - Crystal Input

X2 - Crystal Output

RCLR - RAM Clear Input

AD0-AD7 - Mux’ed Address/Data Bus

PWR - Power-on Interrupt Output

KS - Kickstart Input

CS - RTC Chip Select Input

ALE - RTC Address Strobe

WR - RTC Write Data Strobe

RD - RTC Read Data Strobe

CCO

- RAM Power Supply Output

DS1688/DS1691

3 Volt/5 Volt Serialized Real Time Clock

with NV RAM Control

www.dalsemi.com

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Inhaltsverzeichnis

Seite 1 - DS1688/DS1691

1 of 4 092600FEATURESIncorporates industry standard DS1287 PC clockplus enhanced features: +3 or +5V operation 64–bit Silicon serial number 64–b

Seite 2 - DESCRIPTION

DS1688/DS16912 of 4IRQ - Interrupt Request OutputSQW - Square Wave OutputVCCI- +3 or +5V Main SupplyGND - GroundVBAT- Battery + SupplyVBAUX- Auxiliary

Seite 3 - DS1688S 28-PIN SOIC

DS1688/DS16913 of 4SIGNAL DESCRIPTIONSQW (Square Wave Output) – The SQW output signal functions identical to the DS1689/DS1693 withan exception occurr

Seite 4 - DS1691 28-PIN 740 MIL MODULE

DS1688/DS16914 of 4DS1691 28-PIN 740 MIL MODULEPKG 28-PINDIM MIN MAXA IN. 1.520 1.540MM 38.61 39.12B IN. 0.695 0.740MM 17.65 18.80C IN. 0.350 0.375MM

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Rainbow-electronics DS1691 Bedienungsanleitung

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