RC Configuration Switch for Single-Line Address Setting
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Solution Overview
Problem
Existing configuration switches require multiple lines to set a specific configuration, which is inefficient and costly, especially when no I2C port is available, as they necessitate additional hardware and space.
Innovation Solution
A configuration switch utilizing multiple selectable resistance-capacitance (RC) combinations, where each combination has a unique characteristic variable, allowing a specific configuration to be set and read using a single output line by selecting the appropriate RC combination based on its characteristic variable, such as frequency or duty factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lines are used for configuration switching, then the number of settable configurations increases, but the hardware complexity and cost increase
Solution Approach 1:
The patent changes the parameter used for configuration encoding from spatial (multiple lines) to temporal (time-based). By measuring the time duration of a signal on a single line, the system can distinguish between multiple configurations (e.g., short pulse for configuration 0, long pulse for configuration 1). This temporal parameter substitution allows multiple configuration states to be represented on a single line, resolving the contradiction between configuration versatility and hardware complexity.
2Adaptability or versatility
If I2C expanders are used for configuration switching, then configuration capability is improved, but additional hardware space and cost are required
Solution Approach 1:
The patent extracts the configuration switching functionality from dedicated hardware components (I2C expanders, additional processors) and implements it using a minimal hardware footprint. By utilizing a single I/O line that already exists in the system and applying temporal encoding, the solution removes the need for additional expansion hardware, thereby reducing electronics board space while maintaining full configuration capability.
Solution Approach 2:
The patent makes a single I/O line perform multiple functions: it serves as both a general-purpose input/output and a configuration switching interface. By encoding configuration information in the temporal characteristics of signals on this universal line, the system eliminates the need for dedicated configuration hardware, allowing the same line to serve dual purposes and reduce overall hardware requirements.
3Adaptability or versatility
If an additional processor is used for configuration switching, then configuration flexibility is improved, but cost and hardware resources increase
Solution Approach 1:
The patent implements self-service by enabling the existing I/O system to perform configuration switching without requiring an additional processor. The temporal encoding scheme allows the microcontroller's existing I/O peripherals to autonomously handle configuration state detection and interpretation, eliminating the need for extra processing resources while maintaining configuration flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables setting of a specific configuration using a single line, reducing hardware requirements and costs, and allowing for integration in devices like Profibus and ModBus participants to set addresses, achieving 128 unique configurations with minimal resources.
Implementation Method 1
a specifically selected RC combination (2c) influences a characteristic variable of an output signal (3) on an output (4)
Implementation Method 2
the RC combination selected to set the specific configuration is excited to self-oscillation
Data Source
AI summary
Configuration switch-for setting a specific configuration from a plurality of settable configurations, wherein the configuration switch-has at least one plurality of selectable, mutually differing RC combinations, wherein each RC combination has at least one specific, characteristic variable, which is associated with a settable configuration and wherein to set the specific configuration a specific RC combination is selected/selectable, so that via an output signal-on an output-of the configuration switch, which output signal-comprises the specific, characteristic variable of the selected RC combination, the specific configuration to be set is established based on the specific, characteristic variable.