Common Control Line Resource Detection Using Signal Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing number of optional features and devices in information handling systems leads to increased hardware complexity and cost due to the need for additional pins on controllers or microprocessors to detect their presence.
Innovation Solution
An information handling system uses a common control line with tags having unique signal thresholds to communicate the presence of resources, allowing detection using a single input pin, reducing the need for multiple pins and simplifying hardware configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each optional feature or device is detected using a separate pin on the controller, then the detection reliability is improved, but the device complexity and cost increase
Solution Approach 1:
Multiple detection functions that were previously distributed across separate pins are merged into a single shared control line. Each information handling resource shares the same control line, and their presence is differentiated through unique signal thresholds rather than separate physical connections, thereby reducing hardware complexity while maintaining detection capability.
Solution Approach 2:
The single control line serves multiple detection functions simultaneously. By implementing universal detection where one control line can detect the presence of multiple different information handling resources through threshold-based differentiation, the system eliminates the need for dedicated pins for each resource type.
2Adaptability or versatility
If the number of optional features and devices increases, then the system versatility is improved, but the number of pins on the controller increases
Solution Approach 1:
Instead of adding physical pins to detect new features, the system uses parameter changes in the form of unique signal thresholds. Each information handling resource is assigned a distinct threshold value, allowing the controller to differentiate between various resources using the same physical pin through parameter-based discrimination rather than physical expansion.
3Measurement precision
If separate pins are used for each information handling resource, then the detection precision is improved, but the manufacturing cost increases
Solution Approach 1:
The system creates a virtual representation of multiple detection channels through software-based threshold comparison rather than physical duplication of pins. By copying the detection function across multiple resources through a single physical line using threshold-based differentiation, the system achieves multi-resource detection without the hardware cost of separate pins for each resource.
Data Source
AI summary
Systems and methods for detecting states are disclosed. An information handling system may include a processor and a plurality of information handling resources communicatively coupled to the processor via the common control line. The processor may be configured to produce a first signal on a common control line. Each of the plurality of information handling resources may include a tag having a signal threshold, the tag configured to communicate a second signal via the common control line indicating the presence of the particular information handling resource in response to the first signal exceeding the signal threshold of the tag.