Processor operation inspection system and operation inspection circuit
US8060793B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jun 13, 2008 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Nov 29, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A processor operation inspection system includes a processor and an operation inspection circuit that inspects an operation of the processor. When a program under execution changes from one predefined state to another state, the processor outputs a state switching signal indicating a transition of its state, a state signal indicating a current state to the inspection circuit. The inspection circuit includes a state register that stores the state of the processor, a combinational logic circuit that calculates, according to the stored state of the processor and the state switching signal, a new state to be taken by the processor, and a comparison circuit that inspects the operation of the processor by comparing the calculated new state to the state of the processor inputted as the state signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.