2012年12月12日 · In the previous tutorial, we looked at AND gates, OR gates and signals in VHDL. This tutorial covers the remaining gates, namely NAND, NOR, XOR and XNOR gates in VHDL. The VHDL nand keyword is used to create a NAND gate: The VHDL nor keyword is used to create a NOR gate:

2019年8月21日 · I'm going to guess VHDL is always "bitwise" and never "logical" unless you convert the type to a scalar type: std_logic, bit, or boolean. Mostly, because VHDL is based on ADA language, a strongly typed language, and verilog is based on the c-language a weakly typed language that needs to make a distinction between logical and bitwise operator ...

2020年4月3日 · Logical XOR. Performs logical XOR operation with a logical array or boolean. <logical_array_storage> <= <logical_array> xor <logical _array>; <boolean_storage> <= <boolean> xor <boolean>; The xor keyword is used to specify an XOR between the two elements. The XOR operation is performed and stored in their respective <logical_array_storage> or ...

2020年3月2日 · In VHDL - "xor" is a predefined native operator. It can be used in a straightforward way. Implementation of exclusive-OR or XOR gate is very simple as VHDL contains a key for achieving this. For example, if x and y are inputs and z is the output, the code for implementing a xor in VHDL is: What is a xor gate and how do I implement it in VHDL?

2024年10月5日 · 在VHDL中， xor 代表异或运算， and 代表逻辑与运算。实现全加器时，将三个输入进行异或运算得到和输出，将输入的任意两个进行与运算，然后或运算得到进位输出。

2021年7月15日 · XOR是异或运算符，它是一个双目运算符，即必须有两个操作数，对它们进行按位异或运算，相当于数字逻辑电路中的“异或门”。 例如： XNOR是同或运算符，它是一个双目运算符，即必须有两个操作数，对它们进行按位同或运算，相当于数字逻辑电路中的“同或门”。 例如： 算数运算符，即我们常说的加、减、乘、除等，这类运算符的抽象层级较高，从数字逻辑电路的实现上来看，它们都是基于与、或、非等基础逻辑门来组合实现的。 算数运算符主要有两种用 …

In this section, we will explore how to implement basic logic gates AND, OR, NOT, NAND, NOR, XOR, and XNOR using VHDL. Each implementation includes the VHDL code along with a brief explanation of its functionality.

2020年5月16日 · The simplest elements to model in VHDL are the basic logic gates – AND, OR, NOR, NAND, NOT and XOR. Each of these type of gates has a corresponding operator which implements their functionality. Collectively, these are known as logical operators in VHDL.

The logic operators AND, OR, NAND, NOR, XOR, XNOR and NOT are defined for the predefined data types bit and boolean. They can also be used for one-dimensional array-types ( Array) whose elements are of the type bit or boolean.

1 天前 · 文章浏览阅读217次，点赞3次，收藏4次。本文介绍了VHDL在组合逻辑电路设计及仿真的应用。首先，通过实例展示了如何在VHDL中实现组合电路，并详细解释了测试台架（test-bench）的概念及其在电路验证中的重要性。接着，通过一系列的步骤指导读者如何编写测试台架程序，包括设置实体（entity）和 ...