The traditional serial RapidIO2.1 supports 3 lane modes (1×, 2×, and 4×). In 1× or 2× modes, only 1 or 2 lanes out of 4 work for data-transmission while the others are in idle, which brings a result of bandwidth waste. In addition, one RapidIO interface can merely be connected with one destination. We design a dual-channel serial RapidIO interface based on traditional serial RapidIO interface protocol, which supports 14 transmission modes by a configurable crossbar switch on the PCS layer. It can connect 2 serial RapidIO interfaces simultaneously when it works in the dual-channel mode. This design improves the interconnected flexibility and transmission bandwidth of the RapidIO system. Simulation tests prove that the transmission bandwidth of the dual-channel RapidIO is approximately two times of that of the single channel RapidIO under 1× or 2× modes, and approximately equal to that of the single channel serial RapidIO interface under 4× mode.%传统的串行RapidIO2.1接口支持3种通道模式 (1×、2×、4×) .在2×或1×模式下, 4条物理链路只有2条或1条在进行数据传输, 其余链路被闲置, 造成带宽浪费;另外, 一个RapidIO接口只能与一个目的端互连.基于传统的串行RapidIO2.1接口协议, 设计了一种支持双通路传输的串行RapidIO接口, 通过PCS层的可配置交叉开关共实现14种传输模式, 双通路模式下可同时和两个串行RapidIO接口互连.双通路RapidIO提高了RapidIO系统互连的灵活性和传输带宽.实验结果表明, 在1×或2×模式下, 双通路传输的传输带宽是传统设计的两倍;4×模式下, 双通路RapidIO的有效带宽与传统单通路RapidIO的相同.
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