System for data transmission between a wedge microcontroller and a personal computer microcontroller by disconnecting the keyboard microcontroller and placing the same in hold state
US5848292A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1996 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Jun 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/023
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for interfacing at least one peripheral device with a personal computer is disclosed as including a personal computer microcontroller, a keyboard microcontroller directly connected to the personal computer microcontroller by means of a clock line and a data line, a switching device positioned between the personal computer microcontroller and the keyboard microcontroller, and a wedge microcontroller to which the peripheral device may be connected. The wedge microcontroller further includes a first set of connections to the clock and data lines positioned between the switching device and the keyboard microcontroller, a second set of connections to the clock and data lines positioned between the switching device and the personal computer microcontroller, and a switch control connection to the switching device for opening and closing the switching device. The direct connection between the personal computer microcontroller and the keyboard microcontroller can be disabled by opening the switching device so that the wedge microcontroller may input data from the peripheral device into the personal computer microcontroller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.