Nonvolatile Memory Shared Cell Area Data Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to provide high data integrity in nonvolatile memory devices without increasing the number of reference cells, which is essential for high-integration, lightweight, and slim semiconductor memory devices.
Innovation Solution
A data management method that includes receiving write data, selecting shared data to be stored in a reference cell area, generating reference data based on the shared data, and storing both the write data and reference data in separate areas within the nonvolatile memory device, where the shared data area functions as both a data storage and reference cell area, reducing the need for additional reference cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of reference cells is increased to provide high data integrity, then data integrity is improved, but device area and integration density are worsened
Solution Approach 1:
The patent merges the reference cell area and data cell area into a shared cell area. The same memory cells are used to store both reference data and user data at different time periods, eliminating the need for separate reference cell structures and reducing overall device area while maintaining data integrity through the shared reference functionality
Solution Approach 2:
The shared cell area performs multiple functions: it serves as a reference cell area during reference data storage operations and as a data cell area during user data storage operations. This multi-functionality allows the same hardware resources to provide both reference functionality for data integrity and user data storage, resolving the contradiction between reliability and area
2Reliability
If the number of reference cells is increased to provide high data integrity, then data integrity is improved, but device complexity and integration difficulty are worsened
Solution Approach 1:
The patent combines the reference cell structure and data cell structure into a single shared cell area, reducing device complexity by eliminating redundant structural elements. The control logic manages the shared area through timing control and address management, simplifying the overall memory architecture while maintaining data integrity functions
Solution Approach 2:
The patent introduces dynamic control mechanisms including a control logic unit that dynamically switches the function of the shared cell area between reference data storage and user data storage based on operation mode. This dynamic allocation simplifies the static structural complexity by using time-division multiplexing rather than requiring complex spatial separation
3Reliability
If the number of reference cells is increased to provide high data integrity, then data integrity is improved, but device weight and physical dimensions are worsened
Solution Approach 1:
The patent merges reference cell structures and data cell structures into a shared cell area, significantly reducing the total number of memory cells required. This reduction in cell count directly decreases the device weight and physical dimensions while maintaining data integrity through the shared reference functionality, making the device suitable for lightweight portable applications
Data Source
AI summary
A data management method of a nonvolatile memory device which includes a data cell area and a reference cell area includes selecting shared data from write data input to the memory device; generating reference data based on the shared data; and storing the write data in the data cell area and a first reference area of the reference cell area; and storing the reference data in a second reference area of the reference cell area.