Memory Error Correction for Fast Data Access Latency
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Solution Overview
Problem
Existing memory devices face challenges in achieving fast data access while maintaining reliability due to the latency introduced by internal error detection and correction operations, which can degrade the performance of read and write operations.
Innovation Solution
The memory device performs concurrent internal error detection and correction operations while outputting data, bypassing the latency associated with traditional error detection and correction processes, allowing for immediate data access without waiting for the completion of error correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional error detection and correction operations are performed sequentially before data output, then data reliability is improved, but access latency increases
Solution Approach 1:
The patent performs error detection and correction operations in advance by storing corrected data in a buffer before it is needed. The memory controller proactively corrects errors as data is written to memory, so that when read operations occur, the corrected data is already available immediately without requiring additional correction time during the read operation.
Solution Approach 2:
The patent implements parallel error correction operations that continue concurrently with normal memory operations. The error correction process runs continuously in the background without interrupting or slowing down the primary data access operations, maintaining continuous useful action in both error correction and data access simultaneously.
2Speed
If fast data access is prioritized by bypassing error correction, then access speed is improved, but data reliability deteriorates
Solution Approach 1:
The memory controller proactively performs error correction during write operations or in parallel background processes, storing the corrected data directly in the memory array. This preliminary correction ensures that when fast read operations occur, the data is already corrected and can be accessed immediately without compromising reliability.
Solution Approach 2:
The patent introduces a buffer or intermediate storage structure that holds corrected data before it is accessed. This intermediary allows the system to separate the error correction process from the data access process, enabling fast access to pre-corrected data while maintaining reliability through the correction mechanism.
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.