Keyboard interface
US5146567A · kind A · utility
7Cited by
10References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1989 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Aug 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/023
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer keyboard interface is disclosed with an improved system for controlling the signals on a clock line and a data line for communication between the keyboard interface and the system interface. Two bi-directional input/output ports are used, one for the clock line and one for the data line. The data and clock lines are then used not only for the transmission of data but also used by the keyboard interface for sensing status signals from the system interface. This simplifies the keyboard interface design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.