In-place diagnosable electronic circuit board
US4829520A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Mar 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/267
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An on-board self diagnostic capability is realized in a circuit board with a microprocessor which is located on the circuit board and which interacts for diagnostic purposes with the functional circuitry on the board. The microprocessor interacts with an electrically erasable read-only-memory (EEROM) that is also located on the circuit board. Diagnostic signals occurring during the circuit board's normal operation are automatically detected and stored in the EEROM. Additionally, a control port at the circuit board permits activation in the microprocessor of diagnostic routines that accept input test data, apply test sequences to the functional circuitry and store the diagnostic results in the EEROM. Also, through control of the microprocessor, the EEROM is accessed to retrieve previously stored diagnostic results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.