Configurable PCI-E Interface Module for Bidirectional Host and Target Operation
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Solution Overview
Problem
Conventional PCI-E interface modules are limited to unidirectional operation and are restricted to specific types of connector cables, preventing flexible use of chassis resources and requiring multiple module sets for different configurations.
Innovation Solution
A PCI-E interface module with a signal driving device and selection mechanism that allows bidirectional operation and compatibility with both passive copper and active optical cables, enabling operation as either a host or target module and switching between configurations based on detected states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional cabled PCI-E interface modules are designed with unidirectional operation, then the pin configuration can be simplified and manufacturing can be easier, but the adaptability and versatility of the modules are reduced
Solution Approach 1:
The PCI-E interface module is designed to perform multiple functions by supporting both host and target cable adapter operations. The module includes bidirectional control signals and a selection mechanism that allows it to switch between controlling downstream devices (host mode) and being controlled by upstream devices (target mode), eliminating the need for separate unidirectional modules
Solution Approach 2:
The module incorporates dynamic reconfigurability through bidirectional control signals (UPSTREAM and DOWNSTREAM) and a selection device that can change the module's operational mode based on system requirements. This dynamic switching capability allows the same physical module to adapt its function rather than being fixed in a unidirectional role
2Adaptability or versatility
If multiple sets of cabled PCI-E interface modules are used for different cable types, then compatibility with different cables is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The module is designed with universal cable compatibility by incorporating both passive copper cable support and active optical cable support within the same module. The bidirectional control signals and selection mechanism enable the module to work with different cable types without requiring separate module designs for each cable type
3Adaptability or versatility
If bidirectional control signals are added to enable host and target functionality, then module versatility is improved, but signal interference and system reliability challenges increase
Solution Approach 1:
The module design anticipates potential signal interference issues by incorporating bidirectional control signals that are carefully managed through a selection device. The selection mechanism prevents simultaneous activation of conflicting host and target modes, thereby preemptively avoiding signal conflicts and reliability issues that could arise from improper signal states
Data Source
AI summary
A peripheral component interconnect express (PCI-E) interface module is configured to operate as a host module or a target module. The PCI-E interface module can be employed in a system slot or one of multiple peripheral slots of a PCI-E compatible chassis. In addition, the PCI-E interface module is configured to communicate through passive copper cable or active optical cable.