Configurable Data Bus Inversion Encoding for Dynamic Termination Matching
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Solution Overview
Problem
In data transmission systems, it is challenging to select a suitable Data Bus Inversion (DBI) algorithm that optimally matches the termination scheme of the receiving device, as manufacturers may not know the type of device being coupled or the variable termination methods used, leading to potential counter-indications and inefficiencies.
Innovation Solution
The system automatically discovers and matches the DBI algorithm to the termination scheme of the receiving device by communicating termination scheme information via a control channel or inferring it through measurements, allowing for dynamic adjustment of DBI encoding to optimize power consumption and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed DBI algorithm is used in the transmitting device, then the device complexity is reduced, but the adaptability to different termination schemes deteriorates
Solution Approach 1:
The patent implements dynamic selection of DBI algorithms based on the detected termination scheme. The transmitting device automatically adjusts its encoding algorithm (minimum transitions, minimum zeros, or minimum ones) according to the receiving device's termination configuration, transforming a static fixed algorithm into a dynamic adaptive system that optimizes performance for each specific communication scenario
Solution Approach 2:
The system employs feedback mechanisms where the transmitting device detects the termination scheme used by the receiving device and uses this information to select the appropriate DBI algorithm. This closed-loop approach ensures that the encoding strategy is continuously adapted based on actual communication conditions, resolving the contradiction between simplicity and adaptability
2Loss of energy
If different DBI algorithms are implemented to match termination schemes, then power consumption and noise are reduced, but the device complexity increases
Solution Approach 1:
The patent changes the operational parameters of the DBI encoder by selecting different algorithms (minimum transitions, minimum zeros, minimum ones) based on the termination scheme detected. This parameter change approach allows the system to optimize power consumption and noise performance for each specific termination configuration without requiring complete redesign of the encoding hardware
Solution Approach 2:
The transmitting device is designed with multi-functionality to support multiple DBI algorithms within a single device. This universal design allows one device to handle different termination schemes (terminated, unterminated, pull-up, pull-down) by switching between algorithms, thereby reducing overall system complexity while maintaining optimal power and noise performance
3Adaptability or versatility
If the transmitting device automatically detects and adapts to termination schemes, then the adaptability improves, but the measurement and detection difficulty increases
Solution Approach 1:
The transmitting device performs self-service by automatically detecting its own operational context (the termination scheme used by the receiving device) and configuring its DBI algorithm accordingly. This self-configuration capability eliminates the need for manual setup or complex external signaling, simplifying the detection process while maintaining high adaptability
Data Source
AI summary
An improved data transmission system is disclosed in which data encoding such as Data Bus Inversion (DBI) in a transmitting device is matched to the termination scheme being used in a receiving device. In the improved system, the transmitting device is able to automatically discover the termination scheme being used in the receiving device, and is thereby able to automatically implement a data-encoding algorithm to best match the termination scheme being used. In one example, Information concerning the termination scheme can be communicated to the transmitting device via a control channel, or another channel otherwise dedicated to data encoding such as a DBI channel. In another example, the transmitting device can infer the termination scheme being used via measurements, or by understanding how the receiving device will modify its termination scheme given current data transmission conditions. Alternatively, the receiving device is able to discover the data encoding scheme used in the transmitting device and is able to configure its termination circuitry accordingly.