module top(cin, a, b, sum, count) ; input cin ; input a ; input b ; output sum ; output count ; assign {count,sum} = a + b + cin ; //{};拼接符 endmodule 乘法器 input[1:0]a;input[1:0]b;output[3:0]c; assign c=a*b; //数据选择器 四选一数据选择器,sel[1:0]为选...
答案:in1与in2先同或,再与in3异或 moduletop_module(input in1,input in2,input in3,output out);assign out=in3^(~(in1^in2));endmodule 44.Gates 题目: Ok, let's try building several logic gates at the same time. Build a combinational circuit with two inputs, a and b. There are 7...
In the previous exercises, we used simple logic gates and combinations of several logic gates. These circuits are examples ofcombinationalcircuits. Combinational means the outputs of the circuit is a function (in the mathematics sense) of only its inputs. This means that for any given input valu...
More Verilog Features Problem 36: Conditional ternary operator(Conditional) 三个二选一的MUX组成的最小值电路,但电路的具体实现视综合器描述,如果可以使用四选一MUX也可能使用到。 在过程语句中(initial或者always),被赋值信号需要定义成reg类型 Problem 37: 归纳运算符 Reduction operators(Reduction) 奇偶校验是检...
);//This circuit is a 4-bit ripple-carry adder with carry-out.assignsum = x+y;//Verilog addition automatically produces the carry-out bit.//Verilog quirk: Even though the value of (x+y) includes the carry-out, (x+y) is still considered to be a 4-bit number (The max width of ...
Verilog and Chess Clock FSMSummary This chapter contains sections titled: The Data-Flow Style of Description: Review of the Continuous Assignment The Behavioural Style of Description: the Sequential Block Assignments within Sequential Blocks: Blocking and Nonblocking Describing Combinational Logic using a ...
In decreasing order of precedence (i.e., in the absence of parentheses, operations at the top of the list should be evaluated first) these are: NOT AND OR IMPLIES EQUIVALENCE The last two operators are not widely used in digital design. These operators can be used to form expressions. ...
For Verilog I know it's: (* keep *) wire my_xor; Translate 0 Kudos Copy link Reply Altera_Forum Honored Contributor II 09-06-2012 10:33 PM 528 Views Delay using logic to me is scary stuff. Anyway, for the VHDL Keep: You need this once (I put it just below...
Write the following code in verilog: F = A(BC + B'C') + (AB + A'B')C' + A'B'C What is the purpose of a database, and how does the database accomplish this purpose? The logic function F(A,B,C,D) is given as the maxterm list (M0, M1, M2, M3, M6, M7, M8, M9,...
4.2 Combinational Circuits A Combinational Circuit consists of logic gates its outputs are determined from the present inputs 4.3 Analysis Procedure Step1: Label all gate outputs Step 2: Label all gate inputs and find the Boolean functions for these gates. Repeat the step 2 until the outputs of...