Microprocessor Sequencer Controls Stimulation Circuit via Spare Multiplexor Signal
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Solution Overview
Problem
Existing microprocessor testing systems require substantial software overhead to operate and control stimulation circuits, limiting their ability to perform other control functions due to the need for analog inputs and digital processing.
Innovation Solution
A microprocessor system with a sequencer that outputs spare multiplexor control signals to control stimulation circuits, reducing software overhead by automatically managing analog to digital conversion and multiplexing, allowing for efficient testing of sensor inputs and reducing software burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stimulation circuit is used to provide known analog inputs for testing, then testing capability is improved, but software overhead increases and limits microprocessor performance
Solution Approach 1:
The stimulation circuit is designed to be self-controlled through the sequencer using spare multiplexor control signals. The circuit automatically generates test signals without requiring software intervention, allowing the microprocessor to test its own input channels independently of the main control software, thereby reducing software overhead while maintaining testing capability
Solution Approach 2:
The stimulation circuit is integrated into the existing multiplexor control structure, allowing the same control signals to serve dual purposes: normal multiplexor operation and stimulation circuit control. This multi-functionality eliminates the need for separate control software while enabling comprehensive testing of analog input channels
2Adaptability or versatility
If software controls stimulation circuits for analog input testing, then testing flexibility is improved, but processing time for other control functions decreases
Solution Approach 1:
The testing function is extracted from the main software control loop and implemented as a hardware-controlled autonomous operation. The sequencer manages stimulation circuit operation independently, removing the testing burden from software and freeing up processing time for other control functions while preserving testing flexibility through hardware configuration
3Extent of automation
If spare multiplexor control signals are used to control stimulation circuits, then automation is improved, but device complexity increases
Solution Approach 1:
Spare multiplexor control signals that would otherwise be unused are repurposed to control the stimulation circuit. This approach leverages existing signal infrastructure for dual purposes: normal multiplexor channel selection and stimulation circuit activation, achieving automation without adding new control signal pathways or increasing overall device complexity
Data Source
AI summary
A controller system includes a microprocessor having a sequencer configured to output at least one spare multiplexor control signal, a memory, and a plurality of sensor inputs. At least one stimulation circuit is connected to a sensor signal line. The at least one stimulation circuit being connected to the at least one spare multiplexor control signal. The stimulation circuit is configured such that a state of the at least one spare multiplexor control signal controls a state of the stimulation circuit.