如何在FPGA中利用Verilog实现任意倍的奇数分频 1.假设我们需要进行一个占空比为1:1的奇数倍分频; 首先我们通过两个计数器来实现;其中一个采用上升沿触发,一个采用下降沿触发; 如以5分频为例; 部分具体代码如下: reg [2:0] cnt1; reg [2:0] cnt2; ///上升沿触发 always@(posedge clk) begin i...进...
Writing latches in verilog Subscribe More actions Altera_Forum Honored Contributor II 02-01-2014 10:07 PM 1,497 Views HI: here is my code: module part4(SW,LEDR,LEDG); input[2:0] SW; output[2:0] LEDR; output[0:0] LEDG; assign LEDR = SW; assign Clk = ...
Assume that you want to implement hierarchical Verilog code for this circuit, using three instantiations of a submodule that has a flip-flop and multiplexer in it. Write a Verilog module (containing one flip-flop and multiplexer) named top_module for this submodule. (批注:写出子模块即可!!!) ...
Verilog数字电路中的锁存器,触发器,寄存器之间的区别 彻底理解锁存器,让你不再为锁存器头疼! 锁存器(latch):是电平触发的存储单元,数据存储的动作(状态转换)取决于输入时钟(或者使能)信号的电平值,尽当锁存器处于使能状态时,输出才会随着数据输入发生变化。 分为普通锁存器和门控锁存器,普通锁存器无控制信号...
(the tools that convert your Verilog or VHDL code to low-level FPGA components) is the Gated D Latch. However there are other types of latches:SR Latch, D Latch, JK Latch, and Earle Latch. The individual functionality of these is not discussed in detail here, wikipedia does a good ...
always_latch is equivalent to always @(clk, d) and is the preferred idiom for describing a latch in SystemVerilog. It evaluates whenever clk or d changes. always_comb reevaluates the statements inside the always statement whenever any of the signals on the right-hand side of <= or = in...
Altough I cannot say exactly where the latch is located looking at your code, I think you just have too much logic inside always(*) block. When you have this much assincronous logic (and lots of case inside the block), latches happens almost naturally. I think that, in general, design...
input in, output out); always@(posedge clk) begin out <= in ^ out; end endmodule 1. 2. 3. 4. 5. 6. 7. 8. 9. Mux + DFF Taken from ECE253 2015 midterm question 5 Consider the sequential circuit below: Assume that you want to implement hierarchical Verilog code for this circuit...
example2: 用Verilog HDL实现一个锁存器,当输入数据大于127时,将输入数据输出,否则输出0 不期望的 latch 指的是与设计意图不符,产生的 Latch.主要问题在于设计人员没有合理使用 Verilog HDL语言,常见的原因是对条件语句(if,casse)的分支描述不完整,导致电路的功能不是 预期的,发生了错误. module latch_demo( ...
out<=in^out;end endmodule Mux + DFF Taken from ECE253 2015 midterm question 5 Consider the sequential circuit below: Assume that you want to implement hierarchical Verilog code for this circuit, using three instantiations of a submodule that has a flip-flop and multiplexer in it. Write a Ver...