关键词: FPGA 多路交换开关 行波仲裁

Abstract:

Crossbar is a key component of the high-performance exchange switch used in multicomputer interconnection networks or routers. In this paper, the desi gn and implementation of a high-speed crossbar based on Xilinx Virtex-Ⅱ FPGA is presented,and this crossbar includes the input channels, the arbiter a nd the crossbar. This paper focuses on the design and implementation of the crossbar arbiter. A fair and efficient arbiter is very important for maximiz ing network performance, and it is the critical path that limits the system clock. An improved wavefront arbiter is put forward,which runs well at 135MH z,and proves to be efficient in practice.

Key words: （FPGA, crossbar, wavefront arbitration）