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UPD4992 - 8-Bit Parallel I/O Calendar Clock

Key Features

  • Internal counter for time (hour, minute, second), and calendar (leap year, year, month, day of month, day of week).
  • Super low power consumption (IDD = 2 µA MAX. at VDD = 2.4 V).
  • Automatic determination of leap year, manual setting possible.
  • 12 hour/24 hour mode selectable.
  • 8-bit parallel input/output in BCD data format.
  • 12 kinds of interval timer output (can be used as watchdog timer).
  • Internal voltage detection circuit for automat.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PRELIMINARY DATA SHEET MOS INTEGRATED CIRCUIT µPD4992 8-Bit Parallel I/O Calendar Clock The µPD4992 is a CMOS integrated circuit which outputs 8-bit parallel time and calendar data in a system in which a microprocessor is employed. The µPD4992 operates at 32.768 kHz and provides year, month, day of month, day of week, hour, minute, and second data to a system. The µPD4992 internally contains a voltage regulator so that low power consumption operation and high accuracy are realized even if the supply voltage varies. The µPD4992 uses the 8-bit bus to facilitate interfacing with a microprocessor. FEATURES: • Internal counter for time (hour, minute, second), and calendar (leap year, year, month, day of month, day of week) • Super low power consumption (IDD = 2 µA MAX. at VDD = 2.