Interface Circuit for Dynamic Master-Slave State Switching
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Solution Overview
Problem
Current USB interface technology restricts the ability to dynamically switch between master and slave states in connected terminals, limiting data interaction efficiency.
Innovation Solution
An interface circuit with control circuits and pins configured to switch between master and slave states by disconnecting and reconnecting pins between internal device circuits and external connectors, allowing dynamic state switching according to user instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If USB interface technology is used to connect two terminals, then data interaction or power transfer between terminals is achieved, but the master and slave states of the two terminals are random and cannot be switched
Solution Approach 1:
The patent implements dynamic state switching by introducing control circuits that can change the connection state of pins between internal circuits and external connectors. The control circuits receive control signals and dynamically reconnect/disconnect pins to switch between master and slave states, transforming a static USB interface into a dynamic one that can adapt its role based on operational needs.
Solution Approach 2:
The control circuits act as intermediary components between the USB interface pins and the internal device circuits. These intermediary control circuits manage the connection state of the pins, coordinating the switching between master and slave modes by controlling the signal paths between the interface and internal circuits.
2Productivity
If the master device reads/writes data from/to the slave device through the connection line, then data transfer is achieved, but the slave device cannot read/write data from/to the master device
Solution Approach 1:
The system enables bidirectional data transfer by dynamically switching the master-slave roles. When the original slave device needs to access data, the control circuits switch the connection states to make the original master become the slave and vice versa, allowing flexible bidirectional communication rather than fixed unidirectional transfer.
Solution Approach 2:
The patent changes the operational parameters of the USB interface by switching the master-slave designation. This parameter change allows the data transfer direction to be reversed, enabling the slave device to read/write data from the master device when needed, thus achieving bidirectional data interaction.
3Adaptability or versatility
If pins are disconnected to switch states, then state switching is achieved, but transfer exceptions may occur during state changes
Solution Approach 1:
The control circuits perform preliminary actions by receiving control signals before executing the pin disconnection and reconnection operations. This preliminary signal processing allows the system to prepare for state switching in advance, ensuring that data transfer operations are properly coordinated and exceptions are prevented before they occur.
Solution Approach 2:
The control circuits implement feedback mechanisms to monitor the state switching process and adjust pin connection states accordingly. This feedback control ensures that data transfer operations are synchronized with the state changes, preventing transfer exceptions by coordinating the timing of data operations with the master-slave role transitions.
Data Source
AI summary
The disclosure relates to an interface circuit, method and device for state switching and belongs to the terminal technology field. Aspects of the disclosure provide a circuit for switching a device between a master state and a slave state. The circuit includes a first interface configured to couple the circuit with internal circuits of the device, a second interface configured to couple the circuit with a connector structure that is configured to couple the device with another device that is external to the device and control circuits configured to provide a first signal to the internal circuits via the first interface to switch the internal circuits from a first state to a second state, and provide a second signal via the second interface to the other device to switch the other device from the second state to the first state.