UPD4990A中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

FEATURES

? Built-in counters for time (hour, minute, and second) and date (year, month, day, and week)

? Leap years are adjusted automatically.

? Data is represented in BCD notation (except months in hexadecimal notation) and input/output serially.

? Commands can be set by inputting serial data.

? Selective timing pulses (TPs) are 64 Hz, 256 Hz, 2 048 Hz, and 4 096 Hz and selective output intervals are 1, 10, 30, and 60 seconds.