VHDL is defined by IEEE Standard 1076, IEEE Standard VHDL Language Reference Manual (the VHDL LRM). The original standard was approved in 1987. IEEE procedures require that standards be periodically reviewed and either reaffirmed or revised. The VHDL

The aim of this book is to introduce the new and changed features of VHDL-2008 in a way that is more accessible to users than the formal definition in the LRM.

its describes about vhdl code,syntax etc