Method and apparatus for controlling selectable functions of an external circuit
US5959489A · kind A · utility
6Cited by
3References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1997 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Jan 7, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/1732
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for providing both switch control and processor control over selectable functions of an external circuit. The present invention provides a control circuit having a single input/output port through which the control circuit reads a present function of the external circuit as controlled by the switch circuit, and generates a control signal to override the switch circuit control when the present function is not the same as a desired function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.