Adjusting Output Signal Slew Rate via Nonvolatile Memory Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The variability in electrical characteristics of ICs from different vendors or models can lead to communication errors due to differences in signal waveform slew rates, especially in high-speed data transmission, where timing control is critical.
Innovation Solution
A nonvolatile semiconductor memory device that stores identification information and setting information for output signals, allowing a processor to adjust the output signal driving capability based on the identified IC characteristics, thereby optimizing the signal waveform and preventing communication errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ICs from different vendors or models are connected to the main board, then system adaptability and versatility are improved, but communication errors occur due to variability in electrical characteristics and slew rates
Solution Approach 1:
The patent changes the electrical parameters (impedance, slew rate) of the output signal from the nonvolatile memory device to match the characteristics of the connected IC. By adjusting these parameters based on identification information, the system achieves compatible communication across different IC vendors and models while maintaining reliable signal transmission.
Solution Approach 2:
The system acquires identification information from the connected nonvolatile memory device, uses this information to determine appropriate signal characteristics, and adjusts the output signal parameters accordingly. This feedback mechanism ensures that the main board adapts to the specific electrical characteristics of each connected IC, preventing communication errors while maintaining high adaptability.
2Reliability
If the slew rate of output signal is adjusted to match different IC characteristics, then communication reliability is improved, but device complexity increases due to additional configuration requirements
Solution Approach 1:
The nonvolatile memory device stores its own identification information and optimal signal setting information internally. When connected, the device automatically provides this information to the processor, which then configures the signal parameters. This self-service approach eliminates the need for manual configuration or complex external calibration equipment, reducing overall system complexity while maintaining reliable communication.
Solution Approach 2:
The optimal signal setting information is pre-stored in the nonvolatile memory device during manufacturing. This preliminary preparation allows the system to quickly configure the correct signal parameters upon connection without requiring complex real-time measurement or adjustment procedures, thereby reducing device complexity while ensuring communication reliability.
3Manufacturing precision
If impedance setting is used to control slew rate, then signal waveform optimization is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The impedance control mechanism serves multiple functions: it controls the slew rate of the output signal, matches impedance to prevent reflections, and adapts to different IC types. By making the impedance control mechanism universal and multi-functional, the patent achieves precise signal waveform optimization without proportionally increasing device complexity, as the same mechanism handles multiple signal integrity requirements.
Data Source
AI summary
An apparatus includes a nonvolatile semiconductor memory device storing identification information and first setting information on an output signal, a memory holding identification information of nonvolatile semiconductor memory devices, the identification information including the identification information of the nonvolatile semiconductor memory device, and setting information on an output signal associated with the identification information of the nonvolatile semiconductor memory devices, the setting information including at least second setting information on the output signal, and a processor acquiring the identification information of the nonvolatile semiconductor memory.