This short paper will give you some VHDL code examples that will help you design synchronous circuits that work first time.The philosophy behind Ten-Commandment code is that synthesizers are not to be trusted too much. Most of the code you will see is close to the structural level some more overtly than others.-This short paper will give you some VHDL code examples that will help you design synchronous circuits that work first time.The philosophy behind Ten-Commandment code is that synthesizers are not to be trusted too much. Most of the code you will see is close to the structural level　some more overtly than others.