动态相位调整技术在FPGA中的设计与实现

The design and realization of dynamic phase alignment technology on FPGA

提出一种基于FPGA的动态相位调整实现方案。在高速数据传输接口中,由于数据窗缩小以及传输路径不一致,造成数据和时钟信号在FPGA的接收端发生位偏移和字偏移。动态相位调整技术根据当前各数据线物理状态,对各信号线动态进行去偏移操作,克服了静态相位调整中参数不可再调的缺点,使接口不断适应外部环境的变化,从而保证数据的可靠传输。

An implementation named dynamic phase alignment is put forward to support high speed data interface between FP- GAs. Data may arrive at the FPGA receiver with channel-to-channel bit skew and word skew due to different trace length and smaller data window. A dynamic phase alignment technology is easily implemented for the receiver in the FPGA to effectively re- move skew based on current physics state of the interface, in order to overcome the immovable limitation of static phase alignment. The receiver ensures receiving packet accurately by adjusting the parameter owing to the changing of external environment.