ECC Memory Readout With Concurrent Error Correction
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Solution Overview
Problem
Existing memory devices face challenges in achieving fast data access while maintaining reliability due to latency introduced by internal error detection and correction operations, which can degrade data integrity and increase access times.
Innovation Solution
The memory device performs concurrent internal error detection and correction operations without delaying access operations, allowing data to be output before completion of error correction, and stores error correction information generated by the host device during write operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal error detection and correction operations are performed sequentially before data output, then data reliability is improved, but access time increases
Solution Approach 1:
The patent performs error detection and correction operations in advance during the write operation, storing corrected data directly in the memory array. This preliminary correction eliminates the need for sequential error checking during read operations, thereby maintaining data reliability while reducing access time.
Solution Approach 2:
The patent implements concurrent error correction during write operations, allowing the error correction process to occur continuously alongside normal memory operations rather than interrupting the data access flow. This continuous correction maintains reliability without adding latency to subsequent reads.
2Reliability
If error correction operations are performed during data access, then data integrity is maintained, but access speed decreases
Solution Approach 1:
Error correction is performed preliminarily during the write operation before data is stored, so that when data is read, it has already been corrected. This eliminates the need for additional correction steps during read operations, maintaining integrity while preserving access speed.
Solution Approach 2:
The patent merges the error correction function with the write operation, combining two processes into one unified operation. This integration ensures data integrity is maintained while avoiding the overhead of separate correction steps that would slow down access.
3Loss of time
If data is output before error correction completion, then access latency is reduced, but error detection capability may be compromised
Solution Approach 1:
The patent performs error correction preliminarily during the write operation, so data is already corrected before it needs to be output. This eliminates the trade-off entirely, as data is corrected in advance and can be output immediately without compromising error detection capability.
Solution Approach 2:
The patent provides beforehand cushioning by pre-correcting data during write operations, creating a buffer of corrected data that can be output immediately. This prior correction ensures error detection capability is maintained while allowing immediate data output without latency.
Data Source
AI summary
Methods, systems, and devices for a memory device with an error correction memory device with fast data access are described. For example, during a read operation, a memory device may be configured to output the data indicated by the read operation concurrent with performing an error correction operation. If the memory device detects an error, the memory device may indicate the error to a host device and, in some cases, output the corrected data to the host device. During a write operation, the memory device may store error detection or correction information associated with data to be stored at the memory device. The memory device may, in some cases, store error detection or correction information generated by the host device.