Lookup-Table Input Control to Bypass USB Bandwidth Delays
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Solution Overview
Problem
Current input signals from devices like keyboards are limited by the bandwidth of USB interfaces, preventing real-time control operations in computers.
Innovation Solution
An electronic device with a controller that processes input signals using a lookup table to perform control operations directly or transfer them to a processor, bypassing bandwidth limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If input signals are transferred through USB interface to processor, then control operations can be performed, but the bandwidth limitation of USB interface causes delays and prevents real-time operation
Solution Approach 1:
The patent introduces a lookup table as an intermediary component between the USB interface and the processor. The lookup table stores pre-defined input signal patterns and their corresponding control operations. When an input signal is received, the system checks the lookup table for a match and executes the corresponding control operation directly, bypassing the need for real-time processor intervention. This intermediary mechanism resolves the bandwidth bottleneck by handling routine control operations locally without requiring continuous USB data transfer to the processor.
Solution Approach 2:
The patent applies preliminary action by pre-defining and storing control operations in the lookup table before runtime. Common control operations are anticipated and their corresponding input signal patterns are pre-mapped in the lookup table during system initialization or manufacturing. This allows the system to execute pre-planned control operations immediately upon receiving matching input signals, eliminating the need for real-time signal processing through the USB interface and achieving real-time control response.
2Adaptability or versatility
If all input signals are processed by the processor through USB interface, then comprehensive control operations can be performed, but the USB bandwidth becomes a bottleneck limiting real-time performance
Solution Approach 1:
The patent segments the control operation processing into two distinct paths: a fast path for common operations handled by the lookup table, and a general path for complex or uncommon operations handled by the processor. The lookup table handles routine, frequently occurring control operations with immediate response, while the processor handles less frequent or more complex operations that require additional processing logic. This segmentation allows the system to maintain high productivity for common operations while preserving adaptability for diverse control needs.
Solution Approach 2:
The patent applies local quality by providing different processing capabilities at different levels of the system hierarchy. The lookup table provides fast, deterministic processing for predefined control operations, while the processor provides flexible, adaptive processing for complex operations. Each component has specialized qualities optimized for its specific function, allowing the system to achieve both high efficiency for routine tasks and comprehensive adaptability for diverse control scenarios without being constrained by USB bandwidth for all operations.
Data Source
AI summary
An electronic device, an electronic system, and an operating method thereof are provided. The electronic device includes a processor and a controller. The controller is coupled to the processor. The controller receives an input signal from an input device. The controller, based on a lookup table, performs a first control operation according to the input signal, alternatively, based on the lookup table, transfers the input signal to the processor, such that the processor performs a second control operation according to the input signal. Thereby, the electronic device is capable of increasing an efficiency of the control operation.