Examples of VHDL Descriptions
Advanced Electronic Design Automation
Examples of VHDL Descriptions
Author: Ian Elliott of Northumbria University
This file contains a selection of VHDL source files which serve to illustrate the diversity and power of the language when used to describe various types of hardware. The examples range from simple combinational logic, described in
terms of basic logic gates, to more complex systems, such as a behavioural model of a microprocessor and associated memory. All of the examples can be simulated using any IEEE compliant VHDL simulator and many can be
synthesised using current synthesis tools.
Use the hierarchical links below to navigate your way through the examples:
● Combinational Logic
● Counters
● Shift Registers
● Memory
● State Machines
● Registers
● Systems
● ADC and DAC
● Arithmetic
Combinational Logic
● Exclusive-OR Gate (Dataflow style)
● Exclusive-OR Gate (Behavioural style)
● Exclusive-OR Gate (Structural style)
● Miscell aneous Logic Gates
● Three-input Majority Voter
● Magnitude Comparator
● Quad 2-input Nand (74x00)
● BCD to Seven Segment Decoder
● Dual 2-to-4 Decoder
● Octal Bus Transceiver
● Quad 2-input OR
● 8-bit Identity Comparator
● Hamming Encoder
● Hamming Decoder
● 2-to-4 Decoder with Testbench and Configuration
● Multiplexer 16-to-4 using Selected Signal Assignment Statement
● Multiplexer 16-to-4 using Conditional Signal Assignment Statement
● Multiplexer 16-to-4 using if-then-elsif-else Statement
● M68008 Address Decoder
● Highest Priority Encoder
● N-input AND Gate
Counters
http://www.ami.bolton.ac.uk/courseware/adveda/vhdl/vhdlexmp.html (1 of 67) [23/1/2002 4:15:01 ]
