Frequency comparison and generation in an integrated processor
US6081143A · kind A · utility
11Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1997 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Sep 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An integrated processor includes a microprocessor core and a bus interface unit. The integrated processor receives a reference clock signal and an external clock signal. The frequency of the reference clock signal is compared to the frequency of the external clock signal. Based upon this comparison, the appropriate frequency for the internal clock signal that controls the bus interface unit is determined. A clock generation circuit, such as a phase-locked loop, generates the appropriate frequency for the internal clock signal based upon the comparison of the reference clock signal and external clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.