Memory Path State Check Circuit for Signal Misalignment Detection
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Solution Overview
Problem
Memory systems face performance deterioration and time loss due to misalignment between data and clock signals, which can lead to failed operations and the need for re-training, causing inefficiencies in determining when a re-training operation is required.
Innovation Solution
A memory device equipped with a path state check circuit that samples data and clock signals to generate sample data, compares it with pattern data, and provides check result information to determine if a re-training operation is necessary, allowing the memory controller to efficiently decide and perform re-training operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory controller determines whether a memory operation fails and determines whether to perform the re-training operation, then the misalignment between data and clock signal can be detected, but time loss and memory performance deterioration occur
Solution Approach 1:
The patent applies preliminary action by performing a path state check using pattern data and clock signals before actual memory operations. The path state check circuit proactively detects misalignment conditions between data and clock signals by comparing sampled values, allowing the system to identify potential issues before they cause operation failures. This advance detection eliminates the need for time-consuming failure determination after operations occur, directly resolving the technical contradiction by detecting misalignment without time loss.
2Reliability
If the memory controller determines whether a memory operation fails, then the misalignment can be identified, but memory performance deterioration occurs due to the loss of time
Solution Approach 1:
The path state check circuit performs preliminary detection of signal misalignment using pattern data and clock signals before actual memory operations. By proactively checking the alignment state through sampling and comparison operations, the system identifies misalignment conditions in advance, preventing operation failures and avoiding the performance deterioration that would result from reactive failure detection and re-training operations.
Solution Approach 2:
The memory device performs self-diagnosis through the path state check circuit, which autonomously monitors the alignment between data and clock signals using internally generated pattern data and clock signals. This self-service mechanism eliminates the need for the memory controller to continuously monitor operation failures, allowing the memory device to maintain optimal performance without external intervention while automatically detecting and reporting misalignment conditions.
3Reliability
If a re-training operation is performed to align data with clock signal, then the alignment condition is improved, but time loss occurs due to the re-training operation
Solution Approach 1:
The path state check circuit performs preliminary detection of misalignment conditions before they deteriorate to the point requiring re-training operations. By continuously monitoring the alignment state using pattern data and clock signals, the system identifies early signs of misalignment and can trigger corrective actions proactively, preventing the need for time-consuming re-training operations while maintaining reliable alignment conditions.
Solution Approach 2:
The path state check circuit establishes a feedback mechanism that continuously monitors the alignment between data and clock signals and provides real-time information about the path state. This feedback allows the memory controller to make informed decisions about when re-training operations are necessary, performing them only when actual misalignment is detected rather than periodically or preemptively, thus maintaining alignment conditions while minimizing time loss.
Data Source
AI summary
A memory device includes a path state check circuit configured to check states of signal transmission paths, each signal transmission path including a data transmission path and a clock transmission path of the memory device. The path state check circuit includes a sampling circuit configured to perform a sampling operation by using pattern data that has passed through the data transmission path and a clock signal that has passed through the clock transmission path, and generate sample data, and a management circuit configured to generate a comparison of the sample data with the pattern data and manage check result information indicating whether a re-training operation for the memory device is to be performed, based on a result of the comparison.