Real-time clock device suitable for portable computer having aut

Details Real-time clock device suitable for portable computer having aut Real-time clock device suitable for portable computer having aut

1997-09-25

2000-10-17

Miska, Vit

Horology: time measuring systems or devices

With calendar indicator

368 73, 702178, 711 5, G04B 1924, G04B 2302, G04F 100

Patent

active

061341878

ABSTRACT:
A register group (REG) is constructed by a register for calendar data of year, month, date, hour, minute and second, a data register constructed by an empty area, for storing alarm time of month, date, hour, minute and second, and a register for controlling generation of various interrupts. A comparator compares calendar information of month, date, hour, minute and second of the present time with month, date, hour, minute and second of set alarm time and an interrupt is generated when the compared values coincide with each other.

REFERENCES:
patent: 5422862 (1995-06-01), Wisor
patent: 5487096 (1996-01-01), Pearson et al.
patent: 5829008 (1998-10-01), Podkowa et al.
Motorola Single Chip Microcomputer Data, "MC146818," 1984, pp. 3-996 through 3-1015.
Dallas Semiconductor DS1685/DS1687 3 Volt/5 Volt Real Time Clock, pp. 116-137, 1995.

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