Semiconductor device capable of selecting operation mode based on clock frequency
US6037813A · kind A · utility
27Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Jun 23, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0816
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor device which operates in synchronism with a first clock externally provided. The semiconductor device includes a clock-generation circuit generating a second clock which maintains a predetermined phase relation with the first clock, a check circuit for checking a frequency of the first clock based on at least one internal signal generated by the clock-generation circuit, and an internal circuit which switches an operation mode according to results of the checking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.