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...
UPD4992 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 automatic determination of battery run-down
- High accuracy