How to Describe Rising Edge Detection of 1PPS Signal in Verilog

# 1. Introduction

### Preface

In digital circuit design, the 1PPS (1 Pulse Per Second) signal is a common time reference signal, often used for clock synchronization and data acquisition among other fields. Detecting the rising edge of a 1PPS signal in Verilog, a hardware description language, is a common and important task. This article will introduce how to implement the rising edge detection of a 1PPS signal in Verilog, helping readers understand the basic syntax and applications of Verilog.

### An Overview of Verilog

Verilog is a hardware description language (HDL) used to describe and design digital circuits and systems. It utilizes a syntax similar to that of the C language, allowing for accurate depiction of electronic system behavior. Verilog is widely applied in FPGA design, chip design, and digital system simulation, among others. Through Verilog, engineers can describe the logical functions of circuits and map them onto actual hardware platforms.

# 2. Understanding the 1PPS Signal

The 1PPS signal is a precise time signal, commonly used for clock synchronization and precise timing purposes. Understanding the characteristics of the 1PPS signal can aid us in correctly describing and processing this signal in Verilog. Let's delve deeper into the definition and characteristics of the 1PPS signal.

# 3. Verilog Basics

In this section, we will review the basics of Verilog, including the importance of Verilog syntax and module and port declarations.

#### A Review of Verilog Syntax

Verilog is a hardware description language intended for modeling and simulating digital circuits. It includes syntax structures similar to the C language, such as module declarations, data types, and operators. Verilog is primarily used to describe digital logic circuits and systems.

#### Verilog Modules and Port Declarations

In Verilog, a module represents a hardware circuit wit