Design Recipes for FPGAs, 2nd Edition

Chapter 20

Latches, Flip-Flops, and Registers

Abstract

There are different types of storage elements that will occur from different HDL code, and it is important to understand each of them, so that the correct one results when a design is synthesized. Often bugs in hardware happen due to misunderstanding about what effect a particular HDL construct (in VHDL or Verilog) will have on the resulting synthesized hardware. In this chapter we will introduce the three main types of storage elements that can be synthesized from VHDL or Verilog to an FPGA platform; which are latches, flip-flops and registers.

Keywords

Latches

Flip-flops

registers

20.1 Introduction

There are different types of storage elements that will occur from different HDL code, ...