Microcircuit Board Dual Microcontroller Architecture
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Solution Overview
Problem
Current microcircuit cards equipped with biometric sensors are complex and expensive to design and manufacture, primarily due to the need for secure data processing and storage, which often requires advanced microcontrollers with high computing power and memory capacity.
Innovation Solution
A microcircuit card design featuring a first microcontroller for managing communications, energy, and sensor data, and a second secure microcontroller dedicated to processing and storing secure data, with the second microcontroller having lower computing power and memory, ensuring secure data handling without direct external communication, thereby reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single advanced microcontroller is used to handle both secure data processing and general data processing, then secure data protection can be achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent divides the microcontroller into two separate components: a first microcontroller dedicated to secure data processing and storage, and a second microcontroller for general data processing and communication. This segmentation allows each microcontroller to be optimized for its specific function, reducing the complexity of individual components while maintaining overall system security. The first microcontroller handles only secure operations with restricted access, while the second microcontroller manages communication and non-sensitive tasks.
Solution Approach 2:
The patent extracts the secure data processing functions into a dedicated first microcontroller that is separated from the general-purpose second microcontroller. This extraction ensures that secure operations are isolated and protected, while the second microcontroller can operate with lower security constraints, reducing its complexity and cost.
2Adaptability or versatility
If a single microcontroller with high computing power and memory capacity is used, then both secure and general data processing can be performed, but manufacturing cost increases
Solution Approach 1:
The patent segments the processing capabilities into two separate microcontrollers with different specifications. The first microcontroller is designed with higher security features and appropriate memory for secure data, while the second microcontroller has lower specifications suitable for general communication tasks. This segmentation allows each component to be manufactured at an optimized cost point rather than requiring one expensive high-capacity microcontroller.
Solution Approach 2:
The patent applies local quality by giving each microcontroller different capabilities matched to its specific function. The first microcontroller has enhanced security features and memory for secure data, while the second microcontroller has simpler architecture optimized for communication protocols. This localized optimization reduces overall system cost while maintaining necessary functionality.
3Speed
If the second microcontroller directly communicates with external devices, then communication efficiency improves, but security risks increase
Solution Approach 1:
The patent introduces the first microcontroller as an intermediary between the second microcontroller and external devices. All communication between the second microcontroller and the outside world must pass through the first microcontroller, which acts as a security gateway. This intermediary structure maintains communication efficiency while ensuring that secure data is protected, as the first microcontroller can filter and secure all data exchanges.
4Reliability
If all communication passes through the first microcontroller, then security is maintained, but communication overhead increases
Solution Approach 1:
The first microcontroller serves as an intermediary that manages secure communication pathways. While all external communication must pass through it for security reasons, the system is designed to minimize overhead by establishing efficient communication protocols and pathways. The intermediary role of the first microcontroller is optimized to reduce processing delays while maintaining security requirements.
Data Source
Figure 1~2
AI summary
This description relates to a microcircuit board comprising: a first microcontroller (114); a second microcontroller (118); at least one module (110, 112) for communication with the outside of the board; and a biometric sensor (122), in which: all communication with the outside of the board (100) passes through the first microcontroller (114); and all communication between the sensor (122) and the second microcontroller (118) passes through the first microcontroller (114).