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  1. #1
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    what is meant front end in vlsi

    Hi all,

    Im an vlsi student

    I searched in the net but i couldn't get the exact difference between Back end and Front end methodology in VlSI and ASIC design flow.

    i feel it was much differ from pcb layout back and front end design.

    can anyone clear me this.

    1) why after doing the back end we need programing in vhdl. will we code the pgm in the chip.

    2) we design only the core in the back end then how will we connect the core to the chip package?

    pls clear me this.

    Thanks in advance
    Shiva.

    •   Alt11th August 2009, 14:53

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    back end and front end

    Hi Shiva,

    With respect to Digital Design the flow goes this way.

    RTL coding (Verilog or VHDL)
    Synthesis
    Floorplanning/PowerPlanning
    Placement
    Clock routing
    Routing
    Physical Verification(LVS/DRC)

    RTL Coding+ Synthesis ------> Front End
    Synthesis+ Floorplanning to Physical Verification -------- Backend

    Synthesis can be a part of front end or Backend which can be carried out by either frontend engineer or Backend engineer.

    RTL coding engineer called frontend engineer
    Reminaing steps who carry out called Physical design Engineer or Backend Engineer.

    Hopes this helps

    For more information on ASIC flow you can search on this forum you will get lot of material.

    Regards


    3 members found this post helpful.

    •   Alt11th August 2009, 15:39

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    difference between frontend and backend

    Hi arjun,

    Thank u for your quick response.

    two more question

    will the back end designed according to the rtl coding?

    after the coding will we fuse the code into the chip or just the back end is designed according to the rtl coding same like schematic and pcb designing??

    Thanks
    Shiva.



    •   Alt12th August 2009, 05:45

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    front end and back end design in vlsis

    Hi Shiva,

    Once you have done with RTL coding, either you can go with FPGA or Semi-custom(the one which explained earlier) depending upon your requirement.

    To answer your question.

    >>will the back end designed according to the rtl coding?
    There is no as such backend designed according to the RTL coding.

    I suggest you to read some good book on ASIC Digital Design which will take you the actual design flow and also clarify lots of your doubts.

    Good luck

    Regards,


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    front end and back end of vlsi design

    Hello shivapugal

    as far asic design flow is concerned u can see this link and try better searches in GOOGLE

    http://users.encs.concordia.ca/~taha...asic-notes.pdf

    hope you find this information useful

    thankyou
    Pradeep



  6. #6
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    front end and back end tools in vlsi

    Quote Originally Posted by shivapugal
    Hi all,

    Im an vlsi student

    I searched in the net but i couldn't get the exact difference between Back end and Front end methodology in VlSI and ASIC design flow.

    i feel it was much differ from pcb layout back and front end design.

    can anyone clear me this.

    1) why after doing the back end we need programing in vhdl. will we code the pgm in the chip.

    2) we design only the core in the back end then how will we connect the core to the chip package?

    pls clear me this.

    Thanks in advance
    Shiva.
    There is no programming in VHDL after the backend :)
    The VHDL code is just a description for the design that will be put on the chip

    The Front End starts in the RTL design (VHDL or Verilog), and includes Functional Verification (Simulation, Formal Verification, etc), and in some cases Logical Synthesis which can also be a part of the Back End flow!


    2 members found this post helpful.

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