Apparatus and method for transferring multiple scan length signal groups for JTAG boundary scans
US7519955B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2004 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Apr 15, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/3656
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a JTAG test and debug environment, the signal groups for boundary scans can have several lengths including signal groups that are longer that the shift register out. A storage unit is provided with a plurality of storage location lengths. The boundary scan signal groups are stored in a location having a suitable storage capacity. The command that transfers the boundary scan signal group includes a parameter identifying the relevant location. The scan control unit, upon receiving the command, transfers the entire boundary scan signal group as a result this command even if several transfers through the shift register out are required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.