Universal programming interface for clock generators operable in a parallel programming mode and a serial programming mode
US5586309A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1994 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Nov 15, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A programmable frequency synthesizer includes a first memory (e.g., ROM) for storing a plurality of pre-programmed frequencies, a second memory (e.g., RAM) for storing at least one user input programmable frequency, and dual purpose frequency synthesizer inputs for providing command address information to select one of the pre-programmed frequencies from the first memory and for providing serial data representing a user input programmable frequency to be stored in the second memory. The frequency synthesizer further includes a control input and decoder for directing the address information and the user input programmable frequency data to the first or second memory, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.