Independent Read/Write Source Clocks for Memory Interface Power Balance
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Solution Overview
Problem
Memory systems using a single source clock for both read and write data transfers face inefficiencies, leading to increased power consumption and adverse effects due to mismatched performance benefits for read and write operations.
Innovation Solution
Implementing a multi-source clock scheme with independent source clocks for read and write data transfers, where read operations use a higher frequency and write operations use a lower frequency to match performance metrics, improving energy efficiency and power savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single source clock is used for both read and write data transfers, then device complexity is reduced, but power consumption increases and performance efficiency deteriorates
Solution Approach 1:
The patent divides the single source clock into two independent source clocks: a first source clock for read data transfers and a second source clock for write data transfers. This segmentation allows each clock to be optimized independently for its specific function, reducing overall power consumption while maintaining necessary system complexity only where needed for the division itself.
Solution Approach 2:
The patent applies different clock frequencies locally to different operations: a first frequency for read operations and a second frequency for write operations. This local quality optimization ensures that each operation receives the appropriate clock speed for its performance requirements, improving overall system efficiency.
2Device complexity
If a single source clock is used for both read and write data transfers, then device complexity is reduced, but performance efficiency deteriorates due to mismatched performance benefits
Solution Approach 1:
By segmenting the clock system into two independent clocks, the patent enables read and write operations to proceed at their respective optimal speeds simultaneously, improving overall data transfer efficiency without requiring a complex multi-clock system with extensive synchronization logic.
Solution Approach 2:
The patent changes the clock frequency parameter independently for read and write operations, allowing read operations to use a higher frequency for faster data retrieval while write operations use a lower frequency matched to their performance metrics, thereby optimizing overall productivity.
3Speed
If a higher source clock frequency is used for read operations, then read performance is improved, but power consumption increases
Solution Approach 1:
The patent applies a higher clock frequency locally only to read operations where it provides performance benefit, while write operations use a lower frequency matched to their performance metrics, thereby optimizing speed where needed without unnecessarily increasing power consumption across all operations.
Solution Approach 2:
The patent changes the clock frequency parameter specifically for read operations to achieve higher read speeds, while maintaining a lower frequency for write operations, thus optimizing the energy-speed tradeoff for each operation type independently.
4Productivity
If a higher source clock frequency is used for write operations, then write performance is improved, but energy efficiency deteriorates
Solution Approach 1:
The patent optimizes the clock frequency parameter for write operations by using a lower frequency that matches write performance metrics, avoiding the energy waste that would result from using a higher frequency, thus improving energy efficiency without significantly compromising write productivity.
Data Source
AI summary
Methods, systems, and devices for independent source clocks for memory access operations are described. A memory system may be configured to support a multi-source clock scheme that utilizes independent source clocks for read data transfers and write data transfers across an interface. Based on performing the read operations, the memory system may communicate read data over a channel using a first source clock operating at a first frequency. The memory system may communicate write data over the channel using a second source clock operating at a second frequency. Based on communicating the write data, the memory system may perform one or more write operations.