Data processing device, semiconductor integrated circuit device, and abnormality detection method
US8392643B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2011 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/3024
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing device for detecting the abnormal operation of a CPU is provided. The data processing device comprises a CPU, an interrupt counter, and a counter-abnormal-value detection circuit. The interrupt counter increments a count value based on an interrupt start signal which is outputted in response to an interrupt signal indicative of an interrupt request to the CPU and which indicates that the interrupt request has been accepted, and decrements the count value based on an end-of-interrupt signal which indicates that processing corresponding to the interrupt has completed. The counter-abnormal-value detection circuit detects abnormalities by comparing the count value with a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.