Keyboard controller with integrated real time clock functionality and method therefor
US5854915A · kind A · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1996 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Nov 22, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.