Flash Memory Data Transfer Mode Switching
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Solution Overview
Problem
Conventional flash memory devices have limitations in data transfer rates, which are not sufficient for modern high-performance applications, and increasing these rates leads to higher power consumption, making them unsuitable for portable devices and not competitive with magnetic disk drives.
Innovation Solution
A flash memory module with a multiple-mode data interface that allows for high-performance data transfer while minimizing power consumption, using a source-synchronous advanced mode with reduced voltage swing and maintaining legacy compatibility for command and control communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional flash memory data transfer methods are used, then power consumption is kept low, but data transfer rate is insufficient for modern high-performance applications
Solution Approach 1:
The flash memory device implements multiple operating modes (legacy mode and advanced mode) that allow dynamic switching between different data transfer rates and power consumption levels. The device can adaptively select the appropriate mode based on application requirements, enabling high-speed transfer when needed while maintaining low power consumption during normal operations.
Solution Approach 2:
The invention changes key operating parameters including voltage swing amplitude and clock frequency to achieve different performance levels. In advanced mode, reduced voltage swing and optimized clock timing enable higher data transfer rates without proportionally increasing power consumption, resolving the contradiction between speed and energy usage.
2Productivity
If data transfer rate is increased to meet modern application requirements, then productivity improves, but power consumption increases making devices unsuitable for portable applications
Solution Approach 1:
The flash memory device implements multiple operating modes (legacy mode and advanced mode) that allow dynamic switching between different data transfer rates and power consumption levels. The device can adaptively select the appropriate mode based on application requirements, enabling high-speed transfer when needed while maintaining low power consumption during normal operations.
Solution Approach 2:
The invention changes key operating parameters including voltage swing amplitude and clock frequency to achieve different performance levels. In advanced mode, reduced voltage swing and optimized clock timing enable higher data transfer rates without proportionally increasing power consumption, resolving the contradiction between speed and energy usage.
3Productivity
If conventional data interface mode is used, then legacy compatibility is maintained, but data transfer performance is insufficient for high-performance applications
Solution Approach 1:
The flash memory device is designed with multi-functionality to operate in both legacy mode (compatible with conventional interfaces) and advanced mode (optimized for high-performance applications). This universal design allows the same device to serve diverse application requirements without sacrificing compatibility or performance.
Solution Approach 2:
The flash memory device implements multiple operating modes (legacy mode and advanced mode) that allow dynamic switching between different data transfer rates and power consumption levels. The device can adaptively select the appropriate mode based on application requirements, enabling high-speed transfer when needed while maintaining low power consumption during normal operations.
Data Source
AI summary
A flash memory system including a flash memory device and a controller, operable according to an advanced data transfer mode is disclosed. The flash memory device is operable both in a “legacy” mode, in which read data is presented by the memory synchronously with each cycle of a read data strobe from the controller, and in which input data is latched by the memory synchronously with each cycle of a write data strobe from the controller. In the advanced mode, which can be initiated by the controller forwarding an initiation command to the memory, the flash memory itself sources the read data strobe at a higher frequency, for example at twice the frequency, of that available in the normal mode. In the advanced mode, the input data is presented by the controller synchronously with a higher frequency write data strobe than is available in the normal mode. The voltage swing of the data and control signals is reduced from conventional standards, to reduce power consumption.