UPD4990A中文资料瑞萨数据手册PDF规格书

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.