DS12887 Description
AD0 AD7 NC MOT CS § § § AS R/ W DS RESET IRQ SQW VCC GND Multiplexed Address/Data Bus No Connection Bus Type Selection Chip Select Address Strobe Read/Write Input Data Strobe Reset Input Interrupt Request Output Square Wave Output +5 Volt Supply Ground DESCRIPTION The DS12887 Real Time Clock plus RAM is designed to be a direct replacement for the DS1287. The DS12887 is identical in form, fit, and function to the...
DS12887 Key Features
- Drop-in replacement for IBM AT puter clock/calendar Pin-patible with the MC146818B and DS1287 Totally nonvolatile with o
- 14 bytes of clock and control registers
- 114 bytes of general purpose RAM Programmable square wave output signal Bus-patible interrupt signals ( IRQ ) Three inte
- Time-of-day alarm once/second to once/day
- Periodic rates from 122 ms to 500 ms
- End of clock update cycle
- AS R/ W DS
- Multiplexed Address/Data Bus
- No Connection
- Bus Type Selection