DS12C887 Overview
The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a mon interrupt output, a programmable square wave, and 114 bytes of batterybacked static RAM (113 bytes in the DS12C887 and DS12C887A). The DS12887 integrates a quartz crystal and lithium...
DS12C887 Key Features
- Drop-In Replacement for IBM AT puter Clock/Calendar
- RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year pensation Through 2099
- Binary or BCD Time Representation
- 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode
- Daylight Saving Time Option
- Selectable Intel or Motorola Bus Timing
- Interfaced with Software as 128 RAM Locations
- 14 Bytes of Clock and Control Registers
- RAM Clear Function (DS12885, DS12887A, and DS12C887A)
- Interrupt Output with Three Independently Maskable Interrupt Flags
