Memory Firmware Mode Transition Using Limited Function Mode

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Solution Overview

Problem

Memory systems often struggle to transition between different firmware modes due to architectural constraints, limiting their ability to support multiple command sets and resulting in adverse performance effects such as latency and overhead during transitions.

Innovation Solution

Implementing a limited function mode (LFM) with a reduced command set to facilitate transitions between firmware modes, allowing the memory system to perform verification operations and adjust namespaces, data, and mapping information to ensure seamless mode transitions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the memory system supports multiple firmware modes with different command sets, then the adaptability and versatility are improved, but the device complexity increases due to architectural constraints

Engineering Contradiction:

Improvefirmware mode compatibilityVSAvoidarchitectural complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The firmware architecture is segmented into separate firmware binaries, each dedicated to a specific firmware mode with its associated command set. This segmentation allows the memory system to load and execute only the relevant firmware binary for the current mode, avoiding the complexity of integrating multiple command sets into a single firmware image.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A firmware mode indicator is introduced as an intermediary mechanism that tracks the current firmware mode and guides the selection and loading of appropriate firmware binaries. This intermediary simplifies the transition process between modes by providing a clear state representation that the system uses to determine which firmware binary to load.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the memory system transitions between firmware modes, then the adaptability is improved, but the loss of time increases due to transition latency and overhead

Engineering Contradiction:

Improvefirmware mode switching capabilityVSAvoidtransition latency

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system performs preliminary actions by pre-loading the next firmware binary into memory during idle periods or low-activity states before a mode transition is actually needed. This advance preparation significantly reduces the time required for mode transitions, as the firmware binary is already available in memory and ready for immediate execution.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces traditional mechanical or hardware-based mode switching mechanisms with a software-based firmware loading and execution model. Instead of physically reconfiguring hardware components, the system uses software firmware binaries that can be loaded and switched more rapidly, reducing transition overhead and latency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If the memory system uses a reduced command set in management mode, then the ease of operation is improved for verification operations, but the productivity decreases due to limited functionality

Engineering Contradiction:

Improveverification operation simplicityVSAvoidfirmware mode transition efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The management mode implements a reduced command set tailored specifically for verification operations, providing simplified and focused functionality for that particular task. This local optimization makes verification operations easier to perform while the system can switch to full functionality modes when other operations are needed, balancing simplicity with productivity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250362820A1Techniques for transitioning between firmware modes at a memory system

Publication Date: 2025.11.27 MICRON TECHNOLOGY INC

AI summary

Methods, systems, and devices for techniques for transitioning between firmware modes at a memory system are described. The described techniques provide for a memory system to enter a management mode associated with facilitating a firmware mode transition based on identifying a new firmware download from a host system. While operating in the management mode, the memory system may support one or more verification operations associated with a transition from a first firmware mode to a second firmware mode. For instance, the memory system may identify whether enough blocks of the memory system are available for firmware validation and migration, may adjust namespaces associated with the first firmware mode, may reset portions of data and mapping information stored to the memory system, or any combination thereof, among other functions associated with formatting the memory system for a firmware mode transition.