# Verilog

## [Verilog Design] Verilog implements even, odd and arbitrary fractional frequency division

Table of contents write in front even frequency division Verilog implementation TestBench test files RTL view Simulation waveform Odd divide Verilog implementation TestBench test files RTL view Simulation waveform Arbitrary fractional division Verilog implementation TestBench test files RTL view Simulation waveform write in front In actual project engineering, different clock frequencies are often required to …

## [Verilog Design] Verilog Adder Design

Table of contents synthesizable design integrated process Points to Note Pipeline Design Technology Resource Sharing synthesizable design Synthesizable value is that the designed code can be converted into a specific circuit netlist structure. Synthesis is the process of converting the behavior-level or functional-level circuit model described in [Verilog] language into RTL-level function block or gate-level …

## [HDLBits Question 5] Circuits (1) Combinational Logic

Table of contents write in front Combinational Logic Basic Gates Wire GND NOR Another gate Two gates More logic gates 7420 chips Truth table Two bit equality Simple circuit A Simple circuit B Combine circuits A and B Ring or vibrate Thermostat 3 bit population count Gates and vectors Even longer vectors Multiplexers 2 to …

## [HDLBits Brush Question 3] Verilog Language (3) Modules Hierarchy part

Table of contents write in front Modules: Hierarchy Module Module pos Module name Module shift Module shift8 Module add Module fadd Module cseladd Module addsub write in front This part mainly gives the answers and waveform simulation images directly, and may explain the details of some topics. Modules: Hierarchy Module Instantiating a module  by name …

## [HDLBits Brush Question 2] Verilog Language (2) Vectors section

Table of contents write in front Vectors Vector0 Vector1 Vector2 Vectorgates Gates4 Vector3 Vectorr Vector4 Vector5 write in front Coming to the vector part of [Verilog] syntax, this part is still relatively simple, so only the title, code and simulation results are given, and the rest will not be repeated. Vectors Vector0 Build a circuit …

Task: when: Subroutines contain delay, event, or sequential control statement structures No output or the number of output variables is greater than 1 no input variable You must use tasks . Automatic (reentrant) tasks: Tasks are static in nature, the address space of all declared items in the task is statically allocated, and multiple tasks …

## Implementing a digital clock with Verilog

digital clock Contents of the basic experimental guide Experimental purpose and requirements The basic principle and function of the experiment The main technical indicators of the experiment Design steps lab report requirements each module code 24 base counter hexadecimal counter state adjustment buzzer Display driver divider Top level connection diagram Pin Lock Diagram Contents of …

## + and – usage in verilog syntax

[]+: and -: are mainly used for bit selection in [verilog] syntax . Bit selection extracts specific bits from a vector net, a vector reg, an integer variable, or a time variable. This bit can be addressed using [an expression .] If the bit selection is out of address boundary or if the bit selection …

## Verilog testing TestBench structure

Table of contents 1. Complete TESTBENCH file structure 2. Clock excitation generation 3. Reset signal design 4. Two-way signal design 5. Special signal design 6. Simulation control statement and system task description 7. Write the simulation test file of the adder [After the Verilog] function module HDL design is completed, it does not mean the …