verilog HDL(Hardware Description Language)

Basic Gates

• NOT
• OR
• AND
• NAND
• NOR
• X-OR
• X-NOR

Flip-Flop

• JK
• D
• T
• Master-Slave

Adder

• half-adder
• full-adder
• full adder using half adder
• 4-bit Ripple carry adder
• carry look ahead adder

Subtractor

• half subtractor
• full subtractor

Adder-Subtractor

• 4 bit adder-subtractor

Comparator

• 2 bit magnitude comparator

Code converter

• Binary to Gray
• Gray to Binary
• BCD to Excess-3
• Excess-3 to BCD

Encoder and Decoder

• 3 to 8 decoder
• 8 to 3 encoder

Multiplexer

• 2 to 1 mux
• 4 to 1 mux
• 8 to 1 mux

Counter

Asynchronous

• 4 bit ripple counter
• mod-10 asynchronous counter

Synchronous

• 4 bit random sequence synchronous counter
• Synchronous UP-Down Counter