M-PHY Signal Routing via Memory Card Connectors
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Solution Overview
Problem
The M-PHY standard lacks defined physical connectors, limiting flexibility in device connections and requiring permanent trace-based connections, which restricts user-desired connections and manufacturing efficiencies.
Innovation Solution
Repurposing memory card connectors to accommodate M-PHY standard compliant signals, allowing M-PHY devices with memory card-based connectors to communicate by mapping memory card pins to M-PHY data paths, leveraging existing manufacturing expertise and familiarity with memory card form factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If permanent trace based connections are used for M-PHY standard, then signal integrity and high bandwidth capabilities are achieved, but flexibility in device connections and ease of operation deteriorate
Solution Approach 1:
The patent applies universality by making the M-PHY interface compatible with existing memory card connector form factors (such as microSD, SD, MMC). This allows the same physical connector to serve multiple functions: traditional memory card operations and M-PHY based communications. The interface can work with both permanent trace connections and removable card connectors, providing multi-functionality without compromising signal integrity through the use of proper differential signaling and impedance matching.
2Speed
If permanent trace based connections are used for M-PHY standard, then high bandwidth capabilities are achieved, but adaptability to different device configurations deteriorates
Solution Approach 1:
The interface design enables universal compatibility across different device configurations by adopting standard memory card connector form factors. This allows M-PHY based communications to be implemented in various devices (mobile phones, tablets, cameras, audio players) without requiring custom connector designs, thereby improving adaptability while maintaining the high bandwidth capabilities through proper signal routing and differential pair implementation.
Solution Approach 2:
The patent implements dynamics by enabling the connector to adapt its functionality based on the inserted card type. The system can dynamically detect whether a memory card or M-PHY compliant device is inserted and adjust its operation mode accordingly, allowing the same physical infrastructure to support different data rates and communication protocols, thus enhancing versatility across device configurations.
3Reliability
If custom connectors are designed for M-PHY standard, then optimal signal performance is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent significantly reduces manufacturing complexity by reusing existing memory card connector form factors (microSD, SD, MMC) that have well-established supply chains and manufacturing processes. Instead of designing custom connectors from scratch, the implementation leverages proven connector designs that are already mass-produced, thereby reducing tooling costs, assembly complexity, and supply chain management burden while maintaining signal performance through proper pin assignments and differential signaling.
Solution Approach 2:
The approach applies self-service by utilizing the existing manufacturing infrastructure and design specifications of memory card connectors. The industry's existing expertise, tooling, and production lines for memory card connectors can directly serve M-PHY implementation without requiring separate manufacturing systems, thereby reducing overall manufacturing complexity and enabling faster time-to-market.
4Speed
If custom connectors are designed for M-PHY standard, then high bandwidth capabilities are optimized, but manufacturing costs and device complexity increase
Solution Approach 1:
The patent reduces device complexity by eliminating the need for separate custom connector designs. By using standard memory card connector form factors, the device can maintain high bandwidth capabilities through proper internal routing and differential signaling while reducing overall device complexity. The same connector housing and mechanical interface can support both traditional memory cards and M-PHY based devices, simplifying the device architecture and reducing the number of unique components that need to be designed and managed.
Data Source
AI summary
M-PHY communications are provided over a mass storage-based interface. Related connectors, systems, and methods are also disclosed. In particular, embodiments of the present disclosure take the M-PHY standard compliant signals and direct them through a memory card compliant connector so as to allow two M-PHY standard compliant devices having memory card based connectors to communicate.