Datasheet Details
- Part number
- UPD4991A
- Manufacturer
- NEC
- File Size
- 133.55 KB
- Datasheet
- UPD4991A_NEC.pdf
- Description
- 4-BIT PARALLEL I/O CALENDAR CLOCK
UPD4991A Description
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 inpu.
1.
0 0 B).
Thirteen types of counters are provided: 10-year, 1-year, 10-month, 1-month, 10-day, 1-day, date,.
UPD4991A Features
* Time (hour, minute, and second) and calendar (leap year, year, month, day, and date) counters
* Leap year can be automatically identified or set
* 12- and 24-hour modes selectable
* 4-bit parallel input/output in BCD data format
* Alarm function (hour, minu
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