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UPD4992

NEC
Part Number UPD4992
Manufacturer NEC
Description 8-Bit Parallel I/O Calendar Clock
Published Apr 17, 2005
Detailed Description PRELIMINARY DATA SHEET MOS INTEGRATED CIRCUIT µPD4992 8-Bit Parallel I/O Calendar Clock The µPD4992 is a CMOS integra...
Datasheet PDF File UPD4992 PDF File

UPD4992
UPD4992

Overview
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.
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 watchd...


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