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DS1287

Part Number	DS1287
Manufacturer	Dallas Semiconducotr
Description	Real Time Clock
Published	May 27, 2005
Detailed Description	DS1287 DS1287 Real Time Clock FEATURES PIN ASSIGNMENT MOT NC NC AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 GND 1 2 3 4 5 6 7 8 9...
Datasheet	DS1287 PDF File

Overview

DS1287 DS1287 Real Time Clock FEATURES PIN ASSIGNMENT MOT NC NC AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC SQW NC NC NC IRQ RESET DS NC R/W AS CS • Drop-in replacement for IBM AT computer clock/calendar • Pin compatible with the MC146818A • Totally nonvolatile with over 10 years of operation in the absence of power • Self-contained • Counts subsystem includes lithium, quartz, and support circuitry seconds, minutes, hours, day of the week, date, month, and year with leap year compensation alarm • Binary or BCD representation of time, calendar, and • 12- or 24-hour clock with AM and PM in 12-hour mode • Daylight Savings Time option • Selectable between Motorola and Intel bus timing • Multiplex bus for pin efficiency • Interfaced with software as 64 RAM locations – 14 bytes of clock and control registers – 50 bytes of general purpose RAM 24 PIN ENCAPSULATED PACKAGE PIN DESCRIPTION AD0–AD7 NC MOT CS AS R/W DS RESET IRQ d...

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