Multi-Interface Card Controller for Simultaneous Smart and Memory Host Coordination
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Solution Overview
Problem
Existing multi-interface cards cannot simultaneously support both smart card and memory card interfaces operating at different clock rates and manage power supply voltages and reset signals independently, leading to inefficiencies in managing systems with both types of cards.
Innovation Solution
A multi-interface card with a card controller that manages clock signals, power voltages, and reset signals for both smart card and memory card hosts, allowing simultaneous operation and prioritization of requests based on defined protocols, and includes a memory module for data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-interface card simultaneously supports both smart card and memory card interfaces, then the functionality and versatility of the card system is improved, but the device complexity and difficulty of managing different clock rates and power supply voltages increases
Solution Approach 1:
The patent introduces a card controller as an intermediary component that mediates between the smart card host and memory card host. The card controller includes a smart card interface and a memory card interface, and it manages the coordination between these two interfaces with different clock rates and power supply voltages. This intermediary handles the complexity of interfacing with multiple card types, allowing the hosts to operate independently while maintaining system coherence.
2Adaptability or versatility
If the card controller manages multiple independent card hosts with different clock rates and power supply voltages, then the adaptability of the system is improved, but the difficulty of detecting and measuring system states increases
Solution Approach 1:
The card controller implements feedback mechanisms to monitor the states of multiple card hosts. It detects whether power supply voltages are turned on or off, whether clocks are stopped or running, and whether reset requests are activated or deactivated. This feedback information is used to dynamically adjust the operation of each interface, ensuring that the system adapts to the current state of each card host while maintaining manageable complexity through centralized monitoring.
Data Source
AI summary
A multi-interface card includes smart card interface, memory card interface, card controller and memory module. The smart card interface interfaces with a smart card host using a smart card protocol. The memory card interface interfaces with a memory card host using a memory card protocol. The card controller controls the smart card host and memory card host so that the smart card host and the memory card host simultaneously interface with the smart card and the memory card interfaces, respectively. The memory module stores data transferred from the smart card host and memory card host. The multi-interface card simultaneously supports the smart card interface and the memory card interface. Thus, the one multi-interface card can support a subscriber authentication function and a data storage function.