Circuit for Locking of a Test Bus
| Publication Number: |
SI21978A |
| Application Date: |
20. 1. 2005 |
| Assignee/Applicant: |
Jožef Stefan Institute [SI] |
| Inventor: |
Anton Biasizzo, Franc Novak |
| Title: |
Vezje za zaklepanje testnega vodila [SL], Circuit for Locking of a Test Bus [EN] |
| Description: |
The subject of the submitted invention is a circuit for locking a test bus within electronic circuits, which include a test bus, designed according to the IEEE 1149.1 or IEEE 1149.4 standards. The circuit for locking a test bus is used for preventing access to electronic circuits and systems during their standard operation via the existing testing infrastructure, which include a test bus designed according to the IEEE 1149.1 or IEEE 1149.4 standards. The circuit for locking of a test bus, which consists of a circuit for decoding test commands (1), a multiplexer (2), a register for entering locks and keys (3), a key register (4), a lock register (5) and a comparator (6) is characterised by the fact that the circuit for decoding of test commands (1) decodes two new commands: UNLOCK and LOCK while generating control signals (22), (23), (24), and (25) accordingly. |
| Drawings: |
 |
| Category: |
Electronics, IT and Telecommunications |
| Technology application codes: |
Electronics, IT and telecoms |
| Market application codes: |
Other electronics related |
| www: |
https://worldwide.espacenet.com/patent/search/family/036951077/publication/SI21978A?q=si21978 |
| Patent offices: |
UIL RS |
