DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4990A
SERIAL I/O CALENDAR & CLOCK CMOS LSI
The µPD4990A is a CMOS LSI developed to input/output calendar & clock data serially to/from the micro computer. The crystal frequency is 32.768 kHz and the data items included are time, minute, second, year, month, day, and week.
FEATURES
Built-in counters for tim...
