Memory Diagnosis Apparatus Reducing Processing Time via Reused Reading Tests
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Solution Overview
Problem
Conventional memory diagnosis methods require repeated performance of redundant procedures, leading to longer processing times without improving diagnostic rates.
Innovation Solution
A memory diagnosis apparatus that divides memory into areas, selects base areas for diagnosis, and performs only writing tests on previously diagnosed areas to reduce processing time without compromising diagnostic accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the same memory diagnosis procedure is repeatedly performed on each combination of divided areas, then the diagnostic rate is maintained, but the processing time increases
Solution Approach 1:
The patent performs a reading test on a base area before performing writing tests on combination areas. The reading test result is stored and reused in subsequent diagnosis procedures, eliminating the need to repeatedly perform reading tests on the same base area. This preliminary action reduces processing time while maintaining diagnostic accuracy.
Solution Approach 2:
The patent stores the reading test result of a base area as reusable data. Instead of re-executing the reading test procedure multiple times across different combination areas, the system copies and reuses the stored reading result, significantly reducing redundant processing while preserving diagnostic effectiveness.
2Reliability
If redundant reading tests are performed on already diagnosed areas, then diagnostic completeness is ensured, but processing efficiency decreases
Solution Approach 1:
The patent extracts the reading test procedure as a separate, standalone operation that is performed only once on the base area before combination area diagnosis. This extracted reading test result is then reused across multiple writing test combinations, eliminating redundant operations while ensuring diagnostic completeness through the initial comprehensive reading assessment.
Solution Approach 2:
The patent changes the diagnostic approach by performing the reading test only once and then using that result for multiple writing tests. This parameter change in the testing strategy—shifting from repeated reading tests to a single reading test with multiple writing tests—improves processing efficiency while maintaining diagnostic reliability.
Data Source
AI summary
A memory diagnosis apparatus to diagnose whether a fault occurs in a memory includes a diagnosis execution unit to divide the memory into a plurality of areas, select two or more base areas that are diagnostic targets from among the areas to carry out a memory diagnosis including a reading test and a writing test, and perform only the writing test in carrying out the memory diagnosis on a same base area for second or more times. The diagnosis execution unit is implemented by an arithmetic device that is a processing circuit that executes a memory diagnosis program stored in a storage device.