Explanation of always @ () statement in FPGA Verilog – Explanations and Examples in Vivado

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– In this tutorial, we provide an introduction to the always statement in the Verilog programming language, and we explain how to implement several examples that demonstrate how to use the always statement in Verilog and Vivado.

– The always statement is a very important statement in the Verilog programming language. It can be used to implement both combinatorial and sequential designs. It enables you to execute a Verilog block when an event occurs. The event is user-defined, and it is specified by the sensitivity list. For example, by using the always statement we can execute a block on every rising edge of a pulse clock variable. Here, the sensitivity is a rising edge of a clock. We can also specify even logical statements in the always block.