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    Creating module in allegro

    Hi all, Can anyone explain the step by step procedure in creating module for design reuse. I have four same power supply in my board So draw schematic of power supply and linked it to heirarchial block . Then i created the netlist and opened it in allegro and routed pcb. How can i create...
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    SDRAM routing guidelines

    Hi all, I am working with a pcb with 4 SDRAM chips (TSSOP package) .Data, address ,control and and clock are connected to all the 4 SDRAM chips. What is the routing strategy that i should follow.What should be the length of the signals. Thanks in advance
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    Schematic Design in Concept HDL

    Hi all I have been drawing schematics in Capture CIS for past few years. Now we have switched to Design entry HDL, Is there any tutorial for studying this.am new to this tool Can anyone help me Thanx in advance pcb 87
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    Auto routing in allegro

    Hello all, I have been using allegro 16.0 still havent tried auto routing in any pcb's Can anyone guide me in auto routing Would like to know about spectra too What is the difference between spectra and allegro pcb editor
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    Auto routing in Allegro16.0

    Hi all Can anyone tell me about auto routing features in allegro 16.0 ---------- Post added at 12:11 ---------- Previous post was at 12:06 ---------- How to set a constraint for a particular region...am working on a 10 layer board.using a 500+ pin BGA.created a region and set constraints for...
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    Merging of two PCB's in allegro.

    allegro merge Hii all.... Is there any option of merging two PCB's in allegro. ie two PCB's in same .brd file. If anyone knows please reply.
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    captire CIS to allegro 16.0 exporting error

    allegro gnd no-rat Hi all, I have drawn a schematic in capture CIS While importing it to allegro rats net for the net gnd is not showing. what may be the reason for this? Added after 1 hours 21 minutes: Added after 1 minutes: Hi , Found the solution for that. In the .brd file...
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    Question about schematic symbols for ICs in Orcad Capture

    Hi all, I have a doubt regrading the schematic library. I created some schematic symbols for IC but they are to be created as a single part. So to combine them to a single part, I created a new part (heterogeneous) in the library and saved it. Then opened those single parts and copied them to...
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    Autorouting vs Manual routing

    manual vs autorouting hii all experts, I havnt done autorouting.... but i think manual routing is much better, what do u people think. i am now working on a PC motherboard. what should i do . auto routing ya manual routing.. which one u prefer.....
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    Auto routing in Allegro16.0

    hiii all, Can anyone help me in autoruoting in allegro16.0 I have routed PCB's manually only. So i am not familiar with the constraint settings which are to be given while auto routing the board.presently i'm working on motherboard. it needs to meet with several constraints like etch...
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    Allegro14.2 User Manual

    Hi all I am attaching a user manual for allegro14.2 found it useful for myself... hope this will be a useful training manual for the beginners
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    How to swap pins in two different gates?

    Hi all, I want to know how the pins of a component are swapping. It is a BGA component so made as heterogeneous part in the schematic. Pins which are to be swapped are put in the same pin group,but while trying to swap the pins.. Its showing a message --> " Pins must be on the same...
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    Creating Device file for BGA

    Hi all, Can anyone provide me instrctions for creating a device file.I want to swap the pins of BGA which i am using now. It has 688 pins.I am using Allegro 14.2, While trying to swap the pins its showing 'swap code is zero'. Its very urgent. Thanks in advance.
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    How to add a new via in Allegro 16.0 and how the spacing constraints are given?

    Hi all, I have a doubt regarding allegro 16.0.How can i add a new via in this version? I have made a via named via_56_28,I want to use this via in my board instead of the default via.How can I import this to the board file. I also want to know how the spacing constraints are given? ie line to...
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    Tips for designing pcb layout for pc motherboard

    Hi all, I am now working on a pc motherboard. So can you pls guide me, what are the things to be noted while doing this design. thanking in advance
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    pcb design guidelines

    ipc-2221a pdf hi all, From where shall i get pcb design guidelines.:?:

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