CDP1879C-1 Overview
The CDP1879 real-time clock supplies time and calendar information from seconds to months in BCD format. It consists of 5 separately addressable and programmable counters that divide down an oscillator input. The clock input can have any one of 4 possible frequencies, allowing flexibility in the choice of crystal or external clock sources.
CDP1879C-1 Key Features
- CPU Interface for Use with General-Purpose Microprocessors
- Time Of Day/Calendar
- Reads Seconds, Minutes, Hours
- Reads Day of Month and Month
- Alarm Circuit With Seconds, Minutes or Hours Operation
- Power Down Mode
- Separate Clock Output Selects 1 of 15 Square Wave Signals
- Interrupt Output Activated By Clock Output and/or Alarm Circuit
- Date Integrity Sampling for Clock Rollover Eliminated
- On-Board Oscillator
