12C887 Description
AD0-AD7 - Multiplexed Address/Data Bus NC - No Connect MOT - Bus Type Selection CS - RTC Chip Select Input AS - Address Strobe - Read/Write Input R/ W DS - Data Strobe RESET - Reset Input IRQ - Interrupt Request Output SQW - Square Wave Output VCC - +5 Volt Main Supply GND - Ground DESCRIPTION The DS12C887 Real Time Clock plus RAM is designed as a direct upgrade replacement for the DS12887 in existing IBM patible...
12C887 Key Features
- 15 bytes of clock and control registers
- 113 bytes of general purpose RAM Programmable square wave output signal Bus-patible interrupt signals (IRQ) Three interr
- Time-of-day alarm once/second to once/day
- Periodic rates from 122 ms to 500 ms
- End of clock update cycle Century register
- Multiplexed Address/Data Bus NC
- No Connect MOT
- Bus Type Selection CS
- RTC Chip Select Input AS
- Address Strobe