Mobile Terminal USB Controller Switching Circuit
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Solution Overview
Problem
Conventional mobile communication devices require a switching circuit to connect multiple processors to a single USB port, increasing circuit volume and cost.
Innovation Solution
A mobile communication terminal system with a multimedia processor incorporating a serial interface switching circuit that selectively outputs serial interface signals from both the multimedia processor and the baseband processor to a computer system via a single serial interface port, reducing the need for additional switching circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switching circuit is added to connect multiple processors to a single USB port, then multiple processors can share the USB port, but the circuit volume and cost increase
Solution Approach 1:
The patent integrates the switching circuit function directly into the USB controller, merging the switching functionality with the existing USB control logic. This eliminates the need for a separate physical switching circuit component, thereby reducing circuit volume while enabling multiple processors to share the USB port.
Solution Approach 2:
The USB controller is designed to perform multiple functions: it controls USB connectivity for the application processor and also provides switching capability to connect other processors to the USB port. This multi-functionality eliminates the need for dedicated switching hardware, reducing overall circuit complexity and volume.
2Adaptability or versatility
If a switching circuit is added to connect multiple processors to a single USB port, then multiple processors can share the USB port, but the circuit cost increases
Solution Approach 1:
The switching circuit functionality is merged into the USB controller's existing hardware and software architecture. This integration eliminates the need for additional discrete components, reducing bill of materials cost and simplifying the manufacturing process.
Solution Approach 2:
The USB controller is designed as a universal interface that can serve multiple processors and functions. By making the controller multi-functional, the patent eliminates the need for separate switching hardware, thereby reducing component costs and manufacturing complexity.
3Volume of stationary object
If only one USB port is provided in the mobile phone, then the device volume is reduced, but additional switching circuits are needed to connect multiple processors
Solution Approach 1:
The patent merges the switching control logic into the USB controller's existing architecture. This integration allows the single USB port to serve multiple processors without requiring additional external switching components, thereby maintaining compact device volume while managing processor connectivity.
Solution Approach 2:
The USB controller acts as an intermediary between multiple processors and the single USB port. It manages the switching and routing of data between different processors and the USB interface, eliminating the need for complex external switching circuits while maintaining a compact design.
Data Source
AI summary
A mobile communication terminal system includes a serial interface port, a multimedia output/input module, a multimedia processor, a frequency-signal output/input module, and a baseband processor. The serial interface port is coupled to a computer system via a serial interface. The multimedia output/input module provides a first input signal. The multimedia processor processes the first input signal to generate a first serial interface signal. The frequency-signal output/input module provides a second input signal. The baseband processor processes the second input signal to generate a second serial interface signal to the multimedia processor. The multimedia processor selectively establishes one of a communication connection between the multimedia processor and the serial interface port and a communication connection between the baseband processor and the serial interface port to correspondingly output one of the first serial interface signal and the second serial interface signal to the computer system via the serial interface port.