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CDP1879 - CMOS Real-Time Clock

Datasheet Summary

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.
  • Data integrity sampling for clock rollover eliminated.
  • On-board oscil.

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Datasheet preview – CDP1879

Datasheet Details

Part number CDP1879
Manufacturer GE
File Size 967.65 KB
Description CMOS Real-Time Clock
Datasheet download datasheet CDP1879 Datasheet
Additional preview pages of the CDP1879 datasheet.

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Full PDF Text Transcription

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CMOS Peripherals CDP1879, CDP1879C-1 iN'f RESET POWER DOWN iii) X-O/MEM TPB/Wii TPA CS A2 AI AD VSS' I 2 5 4 5 6 7 B 9 10 II 12 24 VDD 23 XTAL 22 XTAL 21 CLOCK OUT 20 DB7 19 DBS IB DBS 17 OB4 16 OB3 15 OB2 14 OBl 15 OBO 92CS-54345RI TERMINAL ASSIGNMENT CMOS Real-Time Clock 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 • Data integrity sampling for clock rollover eliminated • On-board oscillator 4.19 MHz, 2.09 MHz or 1.048 MHz @ 10 V (CDP1879) crystal operation 4.
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