Serial Interface Crossbar for Clock-Data Swap Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing serial communication interfaces face limitations in reliability, size, weight, manufacturing cost, and power consumption due to constraints on package pins, necessitating improved clock-data swap capabilities.
Innovation Solution
Implementing a crossbar circuit with clock-data swap capability, utilizing a clock-data swap detection circuit to selectively configure internal clock-data swapped or non-swapped configurations based on external port states, allowing for efficient routing without overlapping signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of package pins is increased to improve communication capability, then the signaling capacity is improved, but the package size increases
Solution Approach 1:
The serial interface is designed to support multiple communication modes (clock-data swapped and non-swapped configurations) using the same physical pins. The crossbar circuit enables the interface to adapt between different signaling configurations, allowing one set of pins to serve multiple functional purposes depending on the operational mode required.
2Adaptability or versatility
If the package size is increased to accommodate more pins, then the communication capability is improved, but the area constraints are violated
Solution Approach 1:
The interface incorporates dynamic reconfiguration capability through the crossbar circuit, which can switch between clock-data swapped and non-swapped modes based on operational requirements. This dynamic adaptability allows the system to optimize communication performance without requiring additional physical pins or increasing package area.
3Adaptability or versatility
If clock-data swap capability is added to handle different orientations, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
A crossbar circuit is introduced as an intermediary component between the external serial interface and the internal worker module. This crossbar acts as a flexible routing matrix that can dynamically connect clock and data signals in different configurations, simplifying the overall system architecture while enabling orientation-independent operation.
4Reliability
If multiple signal lines are routed on separate PCB layers, then the signal integrity is improved, but the PCB complexity and weight increase
Solution Approach 1:
The interface design enables clock and data signals to be routed together on the same PCB layer by utilizing the clock-data swap capability. The crossbar circuit internally manages the signal separation and timing relationships, allowing physical proximity of signal lines without compromising signal integrity, thus simplifying PCB routing to single-layer implementations.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Systems and techniques for providing clock-data swap capability for a communication interface are disclosed. A method includes obtaining a clock-data swap check command; determining, based on processing the clock-data swap check command, that an external clock-data swapped state is present at an external clock port of a WM and an external data port of the WM, wherein the external clock port is coupled to a first external serial signal and the external data port is coupled to a second external serial signal; and selecting, based on determining that the external clock-data swapped state is present at the external clock port and the external data port, an internal clock-data swapped configuration for a crossbar circuit. The crossbar circuit is selectably configurable to couple the WM in an internal clock-data swapped configuration or couple the WM in an internal clock-data non-swapped configuration.