Design of Pre-reading Asynchronous FIFO Based on Verilog

Abstract

With the rapid advancement of modern Very Large Scale Integration (VLSI), the increasing complexity of System-on-Chip (SoC) designs has made traditional single-clock domain synchronous architectures insufficient for meeting the escalating demands of high-performance computing and high-bandwidth communication. As a result, asynchronous FIFO has become increasingly prevalent for facilitating Clock Domain Crossing (CDC) data transfer, ensuring reliable communication between asynchronous interfaces. However, conventional asynchronous FIFOs suffer from inherent latency during the data transmission process, leading to a significant lag in data read-out, which ultimately compromises overall system efficiency. Based on Verilog HDL, this paper explores the optimization of standard asynchronous FIFO architectures. By reconfiguring the internal control logic, the design successfully incorporates First-Word Fall-Through (FWFT) functionality, effectively eliminating traditional read-to-output latency and minimizing data retrieval delays, thereby significantly enhancing transmission efficiency and throughput.