Memory Block Activation Control for Bad Block Isolation
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Solution Overview
Problem
Existing memory devices face challenges in efficiently managing bad blocks and optimizing memory operations, particularly in high-duty-cycle environments, leading to inefficiencies and potential data loss.
Innovation Solution
A memory device design that includes a peripheral circuit capable of identifying and preventing the activation of bad blocks by comparing block address information with reference information, generating indication signals, and replacing them with redundant blocks, thereby optimizing memory operations and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the memory device operates in high-duty-cycle environments continuously, then productivity is improved, but reliability deteriorates due to bad block formation and activation
Solution Approach 1:
The peripheral circuit performs preliminary comparison of block address information with reference information before activating memory blocks. This preliminary action identifies potential bad blocks in advance, preventing their activation and thereby maintaining reliability during continuous high-duty-cycle operation without sacrificing productivity
Solution Approach 2:
The system implements a feedback mechanism where the peripheral circuit continuously monitors memory block status by comparing address information against stored reference information. When bad blocks are detected, the system provides feedback to prevent their activation, creating a closed-loop control system that maintains reliability while sustaining high operational efficiency
2Reliability
If the peripheral circuit implements comprehensive bad block identification and management, then reliability is improved, but device complexity increases
Solution Approach 1:
The peripheral circuit merges the bad block identification function with existing memory management circuits. By combining the comparison logic, reference information storage, and block activation control into an integrated peripheral circuit rather than separate components, the system achieves comprehensive bad block management while minimizing the increase in device complexity
Solution Approach 2:
The peripheral circuit is designed with multi-functionality, serving both as a standard memory interface circuit and as a bad block identification and management system. This universal design allows the same circuit structure to perform multiple functions including address decoding, data I/O, and bad block detection, thereby improving reliability without proportionally increasing device complexity
Data Source
AI summary
Examples of the present application disclose memory devices, operating methods of memory devices, and memory systems. An example memory device includes: a memory cell array including: a first memory block; and a peripheral circuit coupled with the first memory block and configured to: receive a first block address information of the first memory block; determine whether the first memory block is a bad block according to the first block address information; generate a first indication signal in response to the first memory block being determined as the bad block; and stop activation of the first memory block pointed to by the first block address information in response to the first indication signal.