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Summer training vhdl


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CETPA INFOTECH PVT LTD is one of the IT education and training service provider brands of India that is preferably working in 3 most important domains. It includes IT Training services, software and embedded product development and consulting services.

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Summer training vhdl

  1. 1. A market leader in the field of technical training is glad toorganize a seminar on VLSI Design (VHDL) to shape the careerof bright students and to turn them into a great engineer. Wehope to have a good time with you..!!! Your concern and co-operation is highly valuable to us. ___________ Team CETPA
  2. 2. To compress the digital world.To explore the hidden perfection and create the brain of a machine.*The above two are considered as a very difficulttasks in the field of electronics engineering, wherein fact it’s a very simple technology.
  3. 3.  VHDL is for coding models of a digital system. Reasons for modeling: ◦ Requirements specification ◦ Documentation ◦ Testing using simulation ◦ Formal verification ◦ Synthesis Goal: ◦ Most ‘reliable’ design process, with minimum cost and time ◦ Avoid design errors!
  4. 4.  VHDL is a programming language that allows one to model and develop complex digital systems in a dynamic environment. Object Oriented methodology for you C people can be observed -- modules can be used and reused. Allows you to designate in/out ports (bits) and specify behavior or response of the system.
  5. 5.  C is procedural language whereas VHDL is semi concurrent & semi sequential language. C is Case Sensitive whereas VHDL is case insensitive. There are some similarities, as with any programming language, but syntax and logic are quite different.
  6. 6. • Interfaces (PORTS)• Behavior• Structure• Test Benches• Simulation• Synthesis
  7. 7. DataflowBehavioralStructuralKind of BORING sounding huh??Well, it gets more exciting with the details !! :)
  8. 8. Uses statements that defines the actualflow of data..... such as, x <= y -- this is NOT less than equal to -- told you its not C this assigns the Boolean signal x to the value of Boolean signal y... i.e. x = y this will occur whenever y changes....
  9. 9. Entity declaration…(Describes the input/output ports of a module) entity name port names port mode (direction)entity reg4 is port ( d0, d1, d2, d3, en, clk : in bit; q0, q1, q2, q3 : out bit ); punctuationend entity reg4; port typereserved words
  10. 10.  Architecture body  Describes an implementation of an entity  May be several per entity Behavioral architecture  Describes the algorithm performed by the module  Contains Process statements, each containing  Sequential statements, including Signal assignment statements and Wait statements
  11. 11.  Omit entity at end of entity declaration. Omit architecture at end of architecture body. Omit is in process statement header. entity reg4 is architecture behav of reg4 is port ( d0, d1, d2 : in bit begin d3, en, clk : in bit; process (d0, ... ) q0, q1, q2, q3 : out bit ... ); begin end reg4; ... end process ; end behav;
  12. 12. Structural architecture  implements the module as a composition of subsystems  contains ○ signal declarations, for internal interconnections  the entity ports are also treated as signals ○ component instances  instances of previously declared entity/architecture pairs ○ port maps in component instances  connect signals to component ports
  13. 13.  An architecture can contain both behavioral and structural parts  Process statements and component instances ○ Collectively called concurrent statements  Processes can read and assign to signals Example: register-transfer-level (RTL) model  Data path described structurally  Control section described behaviorally
  14. 14. multiplier multiplicandshift_regcontrol_ shift_section adder reg product
  15. 15. • Testing a design by simulation• Use a test bench model – A model that uses your model – Apply test sequences to your inputs – Monitors values on output signals • Either using simulator. • Or with a process that verifies correct operation • Or logic analyzer.
  16. 16.  Discrete event simulation  Time advances in discrete steps.  When signal values change—events occur. A processes is sensitive to events on input signals  Specified in wait statements.  Resumes and schedules new values on output signals. ○ Schedules transactions. ○ Event on a signal if value changes.
  17. 17. Initial Design Entry VHDL, Schematic, State Diagram Optimize Boolean Expression into a standard formLogic Optimization - To optimize area or speed Minimized BlocksTechnology Mapping - To minimize area Where the logic block is placed ? Placement - With optimum routing wire Connection between cells Routing - To minimize area. Used to configure the final circuitProgramming Unit
  18. 18. • Implement the VHDL portion of coding for synthesis.• Identify the differences between behavioral and structural coding styles.• Distinguish coding for synthesis versus coding for simulation.• Use scalar and composite data types to represent information.• Use concurrent and sequential control structure to regulate information flow.• Implement common VHDL constructs (Finite State Machines [FSMs], RAM/ROM data structures).
  19. 19. • Executable specification.• Functionality separated from implementation.• Simulate early and fast (Manage complexity)• Explore design alternatives.• Get feedback (Produce better designs)• Automatic synthesis and test generation (ATPG for ASICs)• Increase productivity (Shorten time-to-market)• Technology and tool independence.• Portable design data (Protect investment)
  20. 20. • Digital Signal Processing.• IC Testing & Analysis.• FPGA Design Verification.• FPGA Development.• Hardware Design.• IC designing.• ASIC Development.
  21. 21. • THANK YOU E-Mail•