MCU Pin Mapping for Expansion Board Signal Compatibility

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Solution Overview

Problem

Existing methods for configuring microcontroller units (MCUs) to interconnect and control board parts on circuit boards are inefficient and inflexible, requiring manual analysis of datasheets and reference manuals, and are prone to electrical incompatibilities and conflicts when expansion boards are connected.

Innovation Solution

A computer-implemented method that automatically resolves connections and electrical incompatibilities by merging netlist representations of mother and expansion boards into a virtual board, determining signal associations and mappings, and configuring CT peripherals to ensure compatibility and optimal operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual analysis of datasheets and reference manuals is used to configure MCU pins, then configuration accuracy can be maintained, but configuration time and complexity increase significantly

Engineering Contradiction:

Improveconfiguration accuracyVSAvoidconfiguration time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The system automatically performs the configuration task without requiring manual analysis of datasheets. The automated pin configuration tool extracts connection information from netlists, determines signal associations, and configures MCU pins automatically based on detected electrical connections, eliminating the need for manual intervention while maintaining accuracy

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The manual mechanical process of analyzing datasheets and manually mapping pins is replaced by an automated computational system that processes netlist data, detects electrical connections, and automatically configures pins through software algorithms rather than human analysis

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If expansion boards are connected to increase functionality, then system versatility improves, but electrical incompatibilities and conflicts increase

Engineering Contradiction:

Improvesystem functionalityVSAvoidelectrical compatibility

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary detection and analysis of electrical connections between expansion boards and the mother board before configuration occurs. By analyzing netlists and detecting signal associations in advance, the system identifies potential electrical incompatibilities and resolves them before they cause conflicts during operation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors and detects electrical connections, signal associations, and potential conflicts throughout the configuration process. When electrical incompatibilities are detected, the system provides feedback to resolve conflicts by adjusting pin mappings or identifying incompatible connections, ensuring reliable operation across multiple expansion boards

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If multiple expansion boards are connected via connectors and wires, then system capability expands, but connection complexity and routing difficulty increase

Engineering Contradiction:

Improvesystem capabilityVSAvoidconnection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system segments the complex connection analysis by processing each expansion board's netlist independently, then integrating the results. Each expansion board is analyzed separately for its connections and signals, and these segmented analyses are then combined to form the complete system configuration, making the complex routing manageable and automated

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If pins are configured with multiple functionalities, then device versatility improves, but configuration complexity and risk of errors increase

Engineering Contradiction:

Improvepin functionalityVSAvoidconfiguration ease

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The system automatically determines which pins should have multiple functionalities and how to configure them based on the detected electrical connections and signal associations. The automated tool extracts this information from netlists and configures pins without requiring manual specification of multiple functions, eliminating configuration errors while maintaining versatility

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250363281A1Peripherals and bus configuration for interconnecting electronic parts and devices

Publication Date: 2025.11.27 STMICROELECTRONICS INT NV

AI summary

A computer-implemented method includes: for each pin of a part on a physical or virtual board, determining a signal inbounding or outbounding the pin and creating an association between the signal and the pin, and determining a shortest path connection between the pin and a pin of a configuration target and creating a mapping between the pin of the selected part and the pin of the configuration target; merging the associations and the mappings to detect whether there is an incompatible signal associated with a pin of the part; and responsive to detecting an incompatible signal, searching for an alternative hardware configuration to change at least one mapping.