DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4991A
4-BIT PARALLEL I/O CALENDAR CLOCK
The µPD4991A is a CMOS integrated circuit that has the ability to input/output 4-bit parallel time data and calendar data to/from a microcomputer and includes an alarm function. Its reference oscillation frequency is 32.768 kHz. Hour, minute, second, year, month, day, and date da...
