Test access port controller and a method of effecting communication using the same
US5983379A · kind A · utility
69Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Oct 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/318572
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is disclosed a test access port controller for effecting communications across a chip boundary having a test mode and a diagnostic mode of operation, wherein in the test mode of operation the test data is resultant data from a test operation having an expected and time delayed relationship, and in the diagnostic mode of operation diagnostic data is conveyed both on and off chip in the form of respective independent input and output serial bit streams simultaneously through the test access port controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.