SD Card Wireless Control Mode Switching

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Solution Overview

Problem

Existing SD cards with wireless LAN functions cannot be controlled by standard host devices without dedicated control, limiting their functionality and compatibility.

Innovation Solution

Incorporating an extension register with CMD48 and CMD49 commands for reading and writing, allowing the SD card to autonomously manage wireless LAN functions and communicate with host devices, enabling independent control and data transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If SD cards with wireless LAN function are designed to operate independently without host control, then wireless communication capability is improved, but compatibility with standard host devices deteriorates

Engineering Contradiction:

Improvewireless communication capabilityVSAvoidhost device compatibility

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The SD card dynamically switches between two control modes: host control mode (when control commands are received within the predetermined time) and independent control mode (when control commands are not received within the predetermined time). This dynamic adaptability allows the SD card to maintain compatibility with standard host devices while enabling independent wireless communication capability when needed.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If SD cards are designed to be controlled by host devices, then ease of operation is improved, but functionality is limited to dedicated host devices

Engineering Contradiction:

Improvehost control capabilityVSAvoidoperational functionality

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The system transitions from a static control architecture to a dynamic one where the SD card can operate in host control mode for ease of operation or switch to independent control mode for enhanced functionality. The control unit monitors for control commands within a predetermined time and automatically adjusts the operational mode, allowing the SD card to serve both controlled and autonomous functions.

Inventive Principle:

Principle #15Dynamics

3Extent of automation

If a predetermined time limit is set for receiving control commands, then autonomous operation capability is improved, but control responsiveness may be reduced

Engineering Contradiction:

Improveautonomous control capabilityVSAvoidcontrol command response time

Core Design Contradiction:

Extent of automationVSLoss of time

Solution Approach 1:

The control unit is pre-configured with a predetermined time threshold for receiving control commands. This preliminary setup allows the SD card to automatically transition to independent control mode without requiring complex real-time decision-making, balancing autonomous operation capability with timely response to host commands.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9204477B2Memory device and wireless communication control method of the same

Publication Date: 2015.12.01 KIOXIA CORP

AI summary

According to one embodiment, a memory device includes a nonvolatile semiconductor memory, a control unit and a wireless communication unit. The control unit controls the nonvolatile semiconductor memory. The wireless communication unit includes a wireless communication function and is controlled by the control unit. The control unit includes a first control mode to control the wireless communication unit in accordance with set information when a control command to control the wireless communication unit is not received within a predetermined time. The control unit includes a second control mode to control the wireless communication unit in accordance with the control command when the control command is received within the predetermined time.