Balanced ECC Codeword Mapping for Memory Sensing
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Solution Overview
Problem
Memory devices face challenges in balancing data to implement improved sensing schemes while ensuring error correction, as balancing data conflicts with applying error correction codes, leading to unbalanced codewords and disrupted error detection.
Innovation Solution
A memory device generates a codeword composed of data, parity, and placeholder bits, where bits are mapped to packets to maintain validity during balancing, allowing for balanced data storage protected by an error correction code without disrupting error detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data is balanced to implement improved sensing schemes, then sensing performance is improved, but error correction code application is disrupted leading to unbalanced codewords
Solution Approach 1:
The codeword is segmented into data bits and placeholder bits, where placeholder bits are specifically designated to maintain balancing information. This segmentation allows the data portion to be balanced for sensing while the placeholder portion preserves error detection integrity.
Solution Approach 2:
Placeholder bits act as intermediaries between the balancing process and error correction. These bits carry balancing information without being part of the actual data, allowing the system to maintain both balanced data for sensing and intact error correction codes.
2Stability of the object's composition
If placeholder bits are used to maintain balancing information, then data balancing is preserved, but memory cell usage increases
Solution Approach 1:
Placeholder bits serve multiple functions: they maintain balancing information, enable error detection, and can be integrated into existing memory structures. This multi-functionality reduces the need for separate balancing storage mechanisms.
Solution Approach 2:
The balancing information is merged into the codeword structure itself through placeholder bits, rather than requiring separate storage. This integration allows the same memory cells to store both data and balancing information efficiently.
Data Source
AI summary
Methods, systems, and devices for generating a balanced codeword protected by an error correction code are described. A memory device may receive data bits for storage. Based on the data bits, the memory device may generate a codeword that includes the data bits, parity bits, and placeholder bits. The memory device may balance the codeword by inverting one or more packets of the codeword. After balancing the codeword, the memory device may store at least a portion of the codeword in memory so that a later operation or a decoding process reveals the packets that were inverted as part of the balancing process. Accordingly, the memory device may re-invert the appropriate packets to recover the original data bits.