한양대 Verilog HDL 2

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1. Verilog HDL

Verilog HDL (Hardware Description Language)은 IEEE 1364에서 표준화된 전자회로 및 시스템에 사용되는 하드웨어 기술 언어입니다. Verilog는 CLK에 따라 동시동작 하므로 동시성을 표현할 수 있고, 컴파일 과정이 기존의 프로그래밍언어와는 다르지만 기본적인 문법은 C언어와 유사합니다.
2. Half Adder (HA)

Half Adder (HA)는 기본적인 덧셈 연산을 하는 장치로, 입력 2개와 출력 2개의 구조를 띄고 있습니다. 출력은 Carry와 Sum으로 나타내는데 Carry는 상위 비트로 올라가는 자리 올림수를 뜻하고, Sum은 두 비트의 합을 뜻합니다.
3. Full Adder (FA)

Full Adder (FA)은 이진수의 한 자릿수를 연산하고, 하위 비트에서 올라오는 자리 올림 수 입력을 포함해 출력합니다. 입력 3개와 출력 2개로 이루어진 구조로, 입력 중 하나는 Cin을 뜻하는데 Carry in으로 하위 비트에서 올라오는 자리 올림수입니다. 출력은 Cout, Sum인데 Cout은 Carry out으로 상위 비트로 올라가는 자리 올림수입니다.
4. D Flip-Flop

D Flip-Flop은 SR Flip-Flop에 Not gate를 추가한 것으로 (0,1), (1,0) 값만 사용하기에 다른 input 낭비없이 사용할 수 있습니다. 마찬가지로, CLK의 rising edge에서 값이 변합니다.
5. SR Flip-Flop

SR Flip-Flop은 S = set, R = reset을 뜻합니다. CLK의 rising edge에서 값이 변하고, SR 둘 다 1일 때 output Q가 값이 없는 것을 유의해야 합니다.

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1. Verilog HDL

Verilog HDL (Hardware Description Language) is a widely used language for designing and simulating digital systems, particularly in the field of integrated circuit (IC) design. It provides a powerful and flexible way to describe the behavior and structure of digital circuits at various levels of abstraction, from the gate level to the system level. Verilog HDL allows designers to create complex digital systems, including microprocessors, memory devices, and other integrated circuits, by describing their functionality and interconnections using a textual language. The language's versatility, ease of use, and widespread adoption in the industry make it an essential tool for digital system designers and engineers. Verilog HDL's ability to support both behavioral and structural modeling, as well as its integration with various design automation tools, make it a crucial component in the modern digital design workflow.
2. Half Adder (HA)

A Half Adder is a simple digital circuit that performs the basic addition operation on two binary digits (bits). It takes two input bits, typically denoted as A and B, and produces two output bits: the Sum (S) and the Carry (C). The Sum output represents the least significant bit of the addition result, while the Carry output represents the more significant bit. The Half Adder is the fundamental building block for more complex adder circuits, such as the Full Adder. It is widely used in digital systems, particularly in arithmetic logic units (ALUs) and other computational components. The simplicity and efficiency of the Half Adder make it an essential component in the design of digital circuits, and its understanding is crucial for anyone studying or working in the field of digital electronics.
3. Full Adder (FA)

The Full Adder is a more advanced digital circuit that performs the addition of three binary digits (bits): two input bits (A and B) and a Carry-in bit (Cin) from a previous addition operation. The Full Adder produces two output bits: the Sum (S) and the Carry-out (Cout). The Sum output represents the least significant bit of the addition result, while the Carry-out output represents the more significant bit that is carried over to the next stage of a larger addition operation. The Full Adder is an essential component in the design of digital systems, particularly in arithmetic logic units (ALUs) and other computational circuits. It is more complex than the Half Adder, as it must handle the additional Carry-in bit, but it is a crucial building block for implementing more advanced arithmetic operations, such as multi-bit addition and subtraction. Understanding the functionality and design of the Full Adder is essential for anyone studying or working in the field of digital electronics.
4. D Flip-Flop

The D Flip-Flop is a fundamental sequential logic circuit that is widely used in digital systems. It is a type of edge-triggered flip-flop, which means that it responds to changes in the clock signal (typically the rising or falling edge) to store and update the state of a single bit of information. The D Flip-Flop has a single data input (D) and a single output (Q), which stores the value of the input at the time of the clock edge. This simple yet powerful circuit is the basic building block for many digital components, such as registers, counters, and memory elements. The D Flip-Flop's ability to store and synchronize data is essential for the proper functioning of sequential logic circuits, making it a crucial component in the design of digital systems. Understanding the behavior and applications of the D Flip-Flop is a fundamental requirement for anyone studying or working in the field of digital electronics.
5. SR Flip-Flop

The SR Flip-Flop, also known as the Set-Reset Flip-Flop, is a fundamental sequential logic circuit that is used to store a single bit of information. It has two inputs, Set (S) and Reset (R), and two outputs, Q and its complement, Q'. The SR Flip-Flop is a basic building block for more complex digital circuits, such as counters, registers, and memory elements. The behavior of the SR Flip-Flop is defined by a set of rules that determine how the outputs change in response to the inputs. This circuit is particularly useful in situations where the state of a system needs to be stored and recalled, such as in digital control systems or memory devices. Understanding the operation and applications of the SR Flip-Flop is essential for anyone studying or working in the field of digital electronics, as it provides a foundation for more advanced sequential logic design.