UPD4992中文资料瑞萨数据手册PDF规格书

8-Bit Parallel I/O Calendar Clock

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 mA 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