Memory Test Mode Signaling Without Firmware Loading
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Solution Overview
Problem
Loading firmware onto memory systems for timing and signal analysis increases security risks and reduces flexibility, compromising the integrity and usability of the memory system.
Innovation Solution
A host system configures and enables test mode signaling by transmitting commands to a memory system, determining the test pattern and parameters based on the memory system's capabilities, allowing the memory system to confirm its capability and transmit test signals accordingly, thereby enhancing debugging capabilities and reducing security risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If firmware is loaded onto the memory system for timing and signal analysis, then debugging capabilities are improved, but security risks increase and flexibility is reduced
Solution Approach 1:
The patent extracts the test pattern generation and timing analysis functionality from the memory system firmware and relocates it to the host system. The host system now determines test patterns and parameters, while the memory system only executes commands and transmits test signals. This extraction eliminates security risks associated with loading firmware while maintaining debugging capabilities.
Solution Approach 2:
The patent introduces a command interface as an intermediary between the host system and memory system. The host system transmits commands containing test pattern specifications and parameters, which the memory system interprets and executes. This intermediary mechanism allows the host to control timing and signal analysis without requiring firmware modification, thus maintaining security while enabling debugging.
2Difficulty of detecting and measuring
If firmware is loaded onto the memory system for timing and signal analysis, then debugging capabilities are improved, but flexibility is reduced
Solution Approach 1:
The patent implements dynamic test pattern configuration where the host system can determine and modify test patterns, parameters, and timing characteristics on-demand. The memory system responds dynamically to host commands, allowing flexible adjustment of test conditions without being constrained by pre-programmed firmware. This dynamic approach enables users to adapt test configurations to different debugging scenarios.
Solution Approach 2:
The patent enables parameter changes by allowing the host system to specify various test parameters including pattern type, timing characteristics, signal levels, and duration. The memory system executes tests based on these dynamically provided parameters, enabling flexible adaptation to different testing requirements without firmware modification.
3Adaptability or versatility
If the memory system transmits test signals according to host-configured parameters, then user flexibility increases, but system complexity increases
Solution Approach 1:
The patent segments the testing functionality into two distinct parts: the host system handles test pattern determination, parameter configuration, and analysis, while the memory system handles command execution and signal transmission. This segmentation reduces the complexity burden on the memory system itself, as it only needs to implement command interpretation and signal output without the overhead of firmware management and complex analysis logic.
Data Source
AI summary
Methods, systems, and devices for user-enabled test mode patterns are described. A host system may transmit a command to enable transmission of test signals by a memory system according to a test pattern. The host system may determine the test pattern and parameters for transmission of the test signals based on a capability of the memory system. The memory system may receive the command to transmit the test signals according to multiple parameters, including the test pattern, associated with transmission of the test signals. The parameters may include a speed, gear, rate, clock, mode, lane, hold-off time, scrambling mode, time duration, password, or any combination thereof. The memory system may verify a capability to transmit the test signals in accordance with the parameters and transmit a confirmation message to the host system. The memory system may transmit, in accordance with the parameters and transmitting the confirmation message, the test signals.