Keyboard controller with integrated real time clock functionalit

Details Keyboard controller with integrated real time clock functionalit Keyboard controller with integrated real time clock functionalit

1996-11-22

1998-12-29

Teska, Kevin J.

395821, 395840, H03K 1794

Patent

active

058549153

ABSTRACT:
A keyboard controller for a computer system with integrated Real Time Clock (RTC) functionality. The keyboard controller has a microprocessor for controlling peripheral device bus traffic such as keyboard and mouse traffic. The microprocessor also acts as a boot device for the computer system. By programming the microprocessor to emulate RTC functions, adding a divider circuit, and having an I/O support block which stores RTC registers and an extended CMOS RAM memory block, the entire RTC FSB along with its power detection and switching circuit can be removed.

REFERENCES:
patent: 4710869 (1987-12-01), Enokizono
patent: 5214785 (1993-05-01), Fairweather
patent: 5610601 (1997-03-01), Lahti et al.
patent: 5696987 (1997-12-01), DeLisle et al.

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