ReRAM Data Routing for Power Loss Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-volatile data storage devices face data loss issues due to power loss during writing, and the use of on-board capacitors increases costs and size, while existing solutions do not efficiently address data protection during power interruptions.
Innovation Solution
Incorporating resistive random access memory (ReRAM) in data storage devices, which allows for quicker data storage and recovery by routing data through a bus-to-ReRAM interface, enabling data to be maintained and written to non-volatile memory after power restoration without the need for capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If on-board capacitors are used to protect data during power loss, then data reliability is improved, but manufacturing cost and device size increase
Solution Approach 1:
The patent extracts the data protection function from the traditional capacitor-based approach and implements it using ReRAM technology. The ReRAM device is integrated directly into the memory array, eliminating the need for separate on-board capacitors. This extraction allows the system to maintain data protection capabilities while reducing device complexity and size.
Solution Approach 2:
The patent changes the fundamental parameter of data storage from volatile (capacitor-based) to non-volatile (ReRAM-based). By utilizing the resistive switching properties of ReRAM materials, the system can maintain data states without continuous power or capacitor support, fundamentally changing how data protection is achieved during power loss events.
2Reliability
If on-board capacitors are used to protect data during power loss, then data reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the data storage and data protection functions into a single ReRAM-based memory array. Instead of having separate capacitors for each memory cell, the ReRAM devices perform both storage and protection functions simultaneously. This consolidation simplifies the manufacturing process and reduces overall component count, leading to lower manufacturing costs.
Solution Approach 2:
The patent replaces expensive, physically large capacitors with smaller, more cost-effective ReRAM cells. The ReRAM technology uses simpler material structures and fewer manufacturing steps compared to capacitor-based solutions, making it a more economical choice for achieving the same data protection function.
3Reliability
If data is written to non-volatile memory through latches, then data is stored reliably, but storage time increases
Solution Approach 1:
The patent implements preliminary action by continuously maintaining data in the non-volatile ReRAM memory array, even during write operations to other memory regions. This ensures that data is already prepared and protected before actual write completion, eliminating the need for time-consuming latch-based holding mechanisms and enabling faster data recovery if power is lost during writes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
ReRAM provides a high-efficiency solution for protecting data during power losses by allowing quicker data storage and recovery, reducing manufacturing costs and device size by eliminating the need for capacitors.
Implementation Method 1
resistive random access memory (ReRAM)
Data Source
AI summary
A method includes, in a data storage device that includes a non-volatile memory and a resistive random access memory (ReRAM) on the same die, receiving data from a memory controller via a bus. The method also includes routing the data to data latches of the non-volatile memory via a first path and to the ReRAM via a second path distinct from the first path.