Memory Preamble Disable Mechanism for High-Speed Data Capture
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Solution Overview
Problem
Current memory technologies face challenges in efficiently managing read preambles, particularly at higher clock frequencies where data capture becomes difficult due to shrinking clock periods and constant data valid times, leading to issues with data validity and throughput.
Innovation Solution
A memory device with a preamble disable mechanism that allows for selective enabling or disabling of read preambles, using a training pattern to align data capture points, and employing a data capturing component to determine optimal capture times, thereby optimizing data transfer even at higher frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If read preamble is always transmitted to ensure data validity, then data capture reliability is improved, but data transfer time increases and throughput decreases
Solution Approach 1:
The patent implements a dynamic preamble transmission mechanism where the memory controller selectively transmits preambles based on real-time conditions. The system uses a preamble counter to track consecutive reads without preambles and compares it against a threshold, dynamically adjusting whether to send preambles based on whether the same capture point remains valid, thus adapting to changing data validity conditions
Solution Approach 2:
The system changes the parameter of preamble presence/absence based on operating conditions. By monitoring the preamble counter and comparing it to a threshold, the system switches between two states: transmitting preambles when data validity is uncertain and omitting them when the same capture point is confirmed valid, thereby optimizing the balance between reliability and speed
2Reliability
If read preamble is transmitted at higher clock frequencies, then data validity can be maintained, but the shrinking clock period makes data capture more difficult
Solution Approach 1:
The memory system performs self-validation by using the training pattern within the preamble to automatically determine the optimal data capture point. The data capturing component analyzes the received training pattern and self-adjusts the capture timing, enabling the system to adapt to higher clock frequencies without external intervention or complex synchronization protocols
3Productivity
If read preamble is disabled to improve throughput, then data transfer speed increases, but data capture accuracy may deteriorate
Solution Approach 1:
The system implements feedback through the preamble counter mechanism that monitors the success of preambleless reads. When a read without preamble succeeds, the counter increments; when it fails or a preamble is needed, the counter resets. This feedback loop allows the system to learn from past operations and adjust future preamble transmission decisions to maintain both high throughput and accurate data capture
Data Source
AI summary
A memory device is provided. The memory device includes a preamble disable memory and a memory controller. The preamble disable memory is arranged to store preamble disable data. The preamble disable data includes an indication as to whether a read preamble should be enabled or disabled. In response to a read command, if the preamble disable data includes an indication that the read preamble should be enabled, the memory controller provides the read preamble. Alternatively, in response to the read command, if the preamble disable data includes an indication that the read preamble should be disabled, the memory controller disables the read preamble.