Arria V Hard Processor System Technical Reference Manual

ID 683011
Date 12/02/2022
Public
Document Table of Contents

9.3.5.3. Lightweight HPS-to-FPGA Bridge Clocks and Resets

The master interface into the FPGA fabric operates in the h2f_lw_axi_clk clock domain. The clock is provided by custom logic in the FPGA fabric. The slave interface of the bridge in the HPS logic operates in the l4_mp_clk clock domain. The bridge provides clock crossing logic that allows the logic in the FPGA to operate in any clock domain, asynchronous from the HPS.

The lightweight HPS-to-FPGA bridge has one reset signal, lwhps2fpga_bridge_rst_n. The reset manager drives this signal to the lightweight HPS-to-FPGA bridge on a cold or warm reset.