Method and apparatus for access to a PLA
US4687959A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/17716
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Improved access to programmable logic arrays is provided by continuously asserting and negating a latch inputs control signal, continuously asserting and negating a control signal which discharges a first logic section of the array to provide frequent, current inputs to a second logic section of the PLA and discharging the second section of the PLA only upon receipt of an access request. In the case of asynchronous access, it is also necessary to generate a synchronized data strobe from the unsynchronized one and to generate an acknowledge signal to indicate the presence of valid output data. The disclosed method and apparatus provide access which has a short access time and which also provides outputs which reflect relatively current states of the inputs thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.