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UPD4991A Datasheet - NEC

4-BIT PARALLEL I/O CALENDAR CLOCK

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

UPD4991A General Description

1. BASIC TIME MODE (MODE = 0 * 0 0 B) * Thirteen types of counters are provided: 10-year, 1-year, 10-month, 1-month, 10-day, 1-day, date, 10-hour, 1hour, 10-minute, 1-minute, 10-second, and 1-second. * Date codes are 00H through 06H (0000 through 0110B). (Correspondence between d.

UPD4991A Datasheet (133.55 KB)

Preview of UPD4991A PDF

Datasheet Details

Part number:

UPD4991A

Manufacturer:

NEC

File Size:

133.55 KB

Description:

4-bit parallel i/o calendar clock.
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.

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UPD4991A 4-BIT PARALLEL CALENDAR CLOCK NEC

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