Q. Future_aspect_of_ALU_in_VHDL
"Digital Design and Computer Architecture" by David Harris and Sarah Harris is a highly recommended book for learning VHDL. It provides a solid introduction to digital design concepts and VHDL programming, making it a good choice for beginners and intermediate learners.
In the synthesis part of a VHDL code, the EDA tool provides technology schematic. It describes the structure and sub-structures of the design. We can watch our design from the system level to the gate level.
Peter J. Ashenden has written: 'Digital design' -- subject(s): Embedded computer systems, Verilog (Computer hardware description language), System design 'The VHDL cookbook' 'Digital Design (Verilog)' 'The Designer's Guide to VHDL (Systems on Silicon)' 'The system designer's guide to VHDL-AMS'
VHDL is a hardware description language. We need software or tool to execute VHDL programs. Such software are called EDA tools i. e. electronic design and automation tools. Such tools are provided byXILINXALDECACTELQUARTUSCADENCEMODELSIM etc.
VHDL is a system level programming language and Verilog is a circuit level programming language. VHDL can be viewed as a language written in programmer's point of view. In that manner it is better than VHDL. For example, to write a code for a simple combinational circuit, we need to define from the circuit level in Verilog i. e. FET level. But in VHDL, we can directly take several smaller components and combine them to trealize the circuit. That means, one need not have a knowledge of analog circuits to design something in VHDL. He only needs to know the behavior of the desired design.
And when the ASIC industry needed a standard way to convey gatelevel design data and timing information in VHDL, one of Accelleras progenitors (VHDL International) sponsored the IEEE VHDL team to
VHDL is a hardware description language. XILINX is an EDA tool. EDA tools, electronic design and automation tools, are used to implement the programs like VHDL or Verilog. VHDL has several versions. But all these are standardized by IEEE and they don't belong to XILINX. Several FPGAs and CPLDs are manufactured by XILINX.
Frank A. Scarpino has written: 'VHDL and AHDL digital system implementation' -- subject(s): Computer-aided design, Logic circuits, Electronic digital computers, Data processing, System design, Circuits, VHDL (Computer hardware description language)
A virtual calculator can be implemented using VHDL. We call it VHDL calculator.
C is a high level language that is compiled into machine language for specific system. The system implements some sort of state machine that can process the compiled machine language. In VHDL you have to design the statemachine itself. Furthermore VHDL is compiled into logic primitives that could be built by logic gates which itself could be realized with transistors. C is a programming language. VHDL is a hardware description language.
CAD means computer aided design. CAD tools are used to design chips virtually on a computer. Programming languages like VHDL, Verilog, System C, Syatem Verilog are used for this purpose. The successful designs of these languages can be fabricated into chips.