Datasheet Summary
VIA Technologies, Inc.
Real Time Clock
Features
- Drop-in replacement for IBM AT puter clock/calendar.
- Pin configuration closely matches the DS12887, DS12885and DS12885Q
- Counts seconds, minutes, hours, days, day of the week, date, month, and year with leap year pensation
- Binary or BCD representation of time, calendar and alarm
- 12- or 24-hour clock with AM and PM in 12-hour mode
- Daylight Savings Time option
- Intel bus timing
- Multiplex bus for pin efficiency
- Interfaced with software as 128 RAM locations
- 14 bytes of clock and control registers
- 114 bytes of general purpose RAM
- Programmable square wave output signal
- Bus-patible interrupt signals (IRQ#)
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