MIPI Circuit Multiplexing for Shared DPHY and CPHY Paths
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Solution Overview
Problem
The existing MIPI circuits require a large layout area and are costly due to the numerous independent circuits for DPHY and CPHY modes, which complicates the design and increases manufacturing costs.
Innovation Solution
A MIPI circuit with a path control component that multiplexes interface components and switches between DPHY and CPHY modes, reducing circuit complexity and layout area by sharing interface components across both modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent circuits are used for DPHY and CPHY modes, then the MIPI circuit can support both modes, but the layout area and manufacturing cost increase
Solution Approach 1:
The patent merges the DPHY and CPHY circuits by sharing common interface components (deserializer, encoder, low-power transceiver) between the two modes. The path control component dynamically routes signals to connect pins with appropriate interface components based on the operating mode, eliminating the need for completely separate circuit paths for each mode.
Solution Approach 2:
The interface components are designed to serve multiple functions - the same deserializer, encoder, and transceiver components are used for both DPHY and CPHY modes. The path control component enables these universal components to be dynamically allocated to different modes, reducing the total number of components needed.
2Adaptability or versatility
If independent circuits are used for DPHY and CPHY modes, then the MIPI circuit can support both modes, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple independent circuits into a unified structure where DPHY and CPHY share common interface components. The path control component acts as a intelligent router that dynamically connects pins to the appropriate shared resources based on the active mode, reducing overall circuit complexity.
Solution Approach 2:
The path control component serves as an intermediary that manages the dynamic connection between pins and interface components. It receives mode selection signals and automatically configures the circuit paths, simplifying the control logic and reducing the complexity of mode switching.
3Adaptability or versatility
If more interface components are used to support both DPHY and CPHY modes, then the circuit functionality is enhanced, but the manufacturing cost increases
Solution Approach 1:
The patent designs interface components with universal functionality that can operate in both DPHY and CPHY modes. The deserializer, encoder, and low-power transceiver are configured to handle both protocol types, reducing the total component count and associated manufacturing costs while maintaining full functionality.
Solution Approach 2:
The patent merges the bill of materials for DPHY and CPHY by using shared interface components. Instead of procuring separate sets of components for each mode, the same components are reused dynamically, reducing inventory requirements and manufacturing expenses.
Data Source
AI summary
The disclosure provides a mobile industry processor interface (MIPI) circuit, a chip and an electronic device. The MIPI interface circuit includes N pins, a path control component, and N interface components. The mode of data transmission in the MIPI is controlled via the path control component, which improves the efficiency and flexibility of data transmission. Moreover, by multiplexing the interface components in the data paths of a display physical layer (DPHY) and a camera physical layer (CPHY), the complexity and cost of the MIPI interface circuit can be reduced, and the scope of application of the MIPI can be expanded.