Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

29.2.3. AXI Bridge FPGA Interface Clocks

The AXI interface has an asynchronous clock crossing in the FPGA-to-HPS bridge. The FPGA-to-HPS and HPS-to-FPGA interfaces are synchronized to clocks generated in the FPGA fabric. These interfaces can be asynchronous to one another. The SDRAM controller’s multiport front end (MPFE) transfers the data between the FPGA and HPS clock domains.

  • f2h_axi_clock—AXI slave clock for FPGA-to-HPS bridge, generated in FPGA fabric
  • h2f_axi_clock—AXI master clock for HPS-to-FPGA bridge, generated in FPGA fabric
  • h2f_lw_axi_clock—AXI master clock for lightweight HPS-to-FPGA bridge, generated in FPGA fabric