Firmware Optimization for Die Controller Timing
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Solution Overview
Problem
Conventional storage devices face inefficiencies in debugging hardware after manufacturing, particularly with combinational logic implemented in semiconductors, where issues are not identified until silicon wafers are fabricated, leading to multiple manufacturing cycles for resolution. Additionally, firmware solutions for finite state machines require excessive memory and time, and are not easily updated or space-efficient.
Innovation Solution
The method involves converting core timing control conditions into production-ready conditions to generate firmware instructions, which are then modified to store values in global condition registers and reuse common core timing control conditions, replacing short instructions with long ones, and optimizing firmware to reduce size and improve performance, using a microcontroller to execute these instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If finite state machines are converted into software or firmware, then ease of testing and improvement is improved, but firmware size increases to an unacceptable amount
Solution Approach 1:
The patent segments the finite state machine functionality into modular firmware components that can be independently tested and updated. The state machine is divided into separate state definitions, transition logic, and action routines, allowing targeted modifications without rewriting the entire firmware.
Solution Approach 2:
The patent uses parameter-based configuration where state machine behavior is defined through configurable parameters and constants rather than hard-coded logic. This allows the same firmware structure to handle multiple conditions by changing parameters, reducing the overall firmware size while maintaining comprehensive functionality.
2Ease of repair
If finite state machines are converted into software or firmware, then ease of testing and improvement is improved, but execution time increases to an unacceptable amount
Solution Approach 1:
The patent pre-computes and stores transition tables and state information during firmware initialization, so that during execution, the state machine can quickly lookup next states and actions without performing complex calculations in real-time. This preliminary preparation reduces execution time while maintaining the flexibility of software-based state machines.
Solution Approach 2:
The patent replaces traditional hardware-based finite state machine logic with optimized software implementation that uses lookup tables and direct memory access, substituting sequential software execution for parallel hardware logic while achieving comparable or better performance through efficient data structures and algorithms.
3Productivity
If combinational logic is used to generate signals for over five hundred unique conditions, then performance is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal state machine framework that can handle over five hundred unique conditions through a single configurable software module, rather than requiring separate hardware logic for each condition. The same firmware structure adapts to different conditions through parameter configuration, reducing device complexity while maintaining comprehensive functionality.
Solution Approach 2:
The patent uses template-based firmware generation where a single master template for state machine logic is copied and instantiated multiple times with different parameter configurations to handle various conditions, rather than designing unique hardware logic for each condition. This reduces complexity by reusing the same proven logic structure.
Data Source
AI summary
A method for reducing firmware size and increasing firmware performance. Core timing control conditions used by a die controller are converted into production ready core timing control conditions, from which firmware instructions are then generated. The production ready core timing control conditions comprise a plurality of fixed core timing control conditions. The firmware instructions are modified to determine core timing control condition values for fixed core timing control conditions before implementing storage operations, to store the core timing control condition values in global condition registers, and to modify references to fixed core timing control conditions to access the values in those global condition registers. Finally, the modified firmware instructions are stored on the die controller, which comprises a microcontroller configured to execute them.