Data Strobe Warm-Up Rhythm for High-Speed Memory Bursts
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Solution Overview
Problem
Memory systems experience poor data quality during initial data bursts due to DQ BUS or DQs signals failing to ramp up in time, leading to missed data at higher transfer speeds, which is exacerbated by insufficient warm-up periods for differential and single-ended strobe signals.
Innovation Solution
Implementing a leisure rhythm with a slower data strobe signal rate during warm-up cycles, followed by a regular rate for actual data transfer, allowing sufficient time for signal overlap and reducing the quantity of data transferred during the warm-up period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transfer speed is increased, then productivity is improved, but data quality deteriorates due to signals failing to ramp up in time
Solution Approach 1:
The patent applies preliminary action by implementing a warm-up period before actual data transfer begins. During this warm-up period, the DQs signal ramps up at a reduced data strobe signal rate, allowing the signal to stabilize before full-speed data transfer commences. This preliminary signal conditioning prevents data quality deterioration at higher transfer speeds.
Solution Approach 2:
The patent applies dynamics by making the data strobe signal rate variable rather than fixed. The system dynamically adjusts the data strobe signal rate based on the timing phase: using a reduced rate during the warm-up period and transitioning to a higher regular rate during actual data transfer. This dynamic rate adjustment resolves the contradiction between maintaining high productivity and ensuring data quality.
2Reliability
If warm-up period duration is increased, then data quality is improved, but loss of time increases
Solution Approach 1:
The patent applies periodic action by structuring the data transfer process into distinct phases: a warm-up period with reduced data strobe signal rate followed by a regular data transfer period with higher rate. This periodic structure allows the system to achieve necessary signal stabilization (improving data quality) while limiting the warm-up duration to only what is necessary for proper signal ramping, thereby minimizing time loss.
3Reliability
If data strobe signal rate is reduced during warm-up, then data quality is improved, but productivity decreases during warm-up period
Solution Approach 1:
The patent applies partial action by transferring only a limited portion of data (or placeholder data) during the warm-up period at reduced speed, rather than attempting full-speed transfer. This partial data transfer approach accepts reduced productivity during warm-up in exchange for ensuring proper signal conditioning, with the understanding that full productivity is achieved during the subsequent regular data transfer period.
Data Source
AI summary
Methods, systems, and devices for leisure rhythm for data burst are described. A leisure rhythm may be implemented for data strobe signals. For example, a controller may drive a data strobe signal according to a first rate, or leisure rhythm, during one or more warm-up cycles of a warm-up period. After the warm-up period ends, a second data strobe rate may be used to transfer data for a read operation or a write operation using a data channel. In some examples, data strobe signals may include differential signals or single ended signals. Rates for data strobe signals may also ramp up using multiple rates over time.