bq3285
Real-Time Clock (RTC)
Features
вћ¤ Direct clock/calendar replacement for IBMВ® AT-compatible
computers and other applications
вћ¤ Functionally compatible with the
DS1285 -Closely matches MC146818A
pin configuration вћ¤ 114 bytes of general nonvolatile
storage
вћ¤ 160ns cycle time allows fast bus
operation вћ¤ Calendar in day of the week, day
of the month, months, and years,
with automatic leap-year adjustment
вћ¤ Time of day in seconds, minutes,
and hours -12-or 24-hour format
Optional daylight saving
adjustment вћ¤ Programmable square wave output
вћ¤ Three individually maskable interrupt event flags: вћ¤ Selectable Intel or Motorola bus
timing -Periodic rates from 122Вµs to
500ms вћ¤ Less than 0.5ВµA load under battery operation -Time-of-day alarm once per
second to once per day -End-of-clock update cycle вћ¤ 14 bytes for clock/calendar and
control General Description
The CMOS bq3285 is a low-power …
