基于FPGA的高速网闸交换卡的设计

The Design of High Speed Gap Technology Card Based on FPGA

为了解决当前对高速物理隔离设备的需求,描述了一种采用FPGA设计的10 Gb/s交换卡硬件电路方案。该方案首次选用Xilinx V6 FPGA的高速GTX硬核收发器,选取万兆光模块SFP+,使用PCI-express2.0总线。FPGA通过PCI-express总线技术完成了数据在和主机的相连,通过光模块与internet通信。在设计PCB的时候根据信号完整性理论,在设计中通过使用蛇形线、端接电阻、磁珠、电容和铺地铜等措施以解决阻抗匹配、串扰、电磁兼容等信号完整性问题。测试结果表明,FPGA和PCIE总线成功应用于数据交换,实现的交换卡工作正常稳定。

The demand of high speed physical isolation provides a 10 Gb/s switch hardware scheme which design by FPGA.That scheme firstly choose the high speed GTX hardware transceiver in Xilinx V6 FPGA,10 Gb / s optical module SFP ＋ and PCI Express 2.0 bus.FPGA is a main chip that connects with host by PCI-Express bus.FPGA communicate with internet by SFP ＋.When draw PCB,some actions are maken the signal better by signal integrity theory.The actions are serpentine curve,terminating resistor,magnetic bead,capacitance and ground copper to solve some signal integrity problems that impedance matching,crosstalk and electromagnetic compatibility.From the test result,FPGA and PCIE are successfully applied to data exchange,and the operation is stable.