Flip-flop circuit with controllable copying between slave and scan latches
US5257223A · kind A · utility
106Cited by
5References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Nov 13, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A scannable flip-flop circuit allows data at its data input or its scan input to be stored in the flip-flop at its data output or shifted out of the flip-flop at its scan output. The flip-flop provides control circuitry for selecting the source of the input data and scan data. Data stored at the flip-flop data output may also be shifted out at the scan output. During scan operations, additional control circuitry allows data stored at the data outputs to be preserved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.