element14 Community
element14 Community
    Register Log In
  • Site
  • Search
  • Log In Register
  • Community Hub
    Community Hub
    • What's New on element14
    • Feedback and Support
    • Benefits of Membership
    • Personal Blogs
    • Members Area
    • Achievement Levels
  • Learn
    Learn
    • Ask an Expert
    • eBooks
    • element14 presents
    • Learning Center
    • Tech Spotlight
    • STEM Academy
    • Webinars, Training and Events
    • Learning Groups
  • Technologies
    Technologies
    • 3D Printing
    • FPGA
    • Industrial Automation
    • Internet of Things
    • Power & Energy
    • Sensors
    • Technology Groups
  • Challenges & Projects
    Challenges & Projects
    • Design Challenges
    • element14 presents Projects
    • Project14
    • Arduino Projects
    • Raspberry Pi Projects
    • Project Groups
  • Products
    Products
    • Arduino
    • Avnet Boards Community
    • Dev Tools
    • Manufacturers
    • Multicomp Pro
    • Product Groups
    • Raspberry Pi
    • RoadTests & Reviews
  • Store
    Store
    • Visit Your Store
    • Choose another store...
      • Europe
      •  Austria (German)
      •  Belgium (Dutch, French)
      •  Bulgaria (Bulgarian)
      •  Czech Republic (Czech)
      •  Denmark (Danish)
      •  Estonia (Estonian)
      •  Finland (Finnish)
      •  France (French)
      •  Germany (German)
      •  Hungary (Hungarian)
      •  Ireland
      •  Israel
      •  Italy (Italian)
      •  Latvia (Latvian)
      •  
      •  Lithuania (Lithuanian)
      •  Netherlands (Dutch)
      •  Norway (Norwegian)
      •  Poland (Polish)
      •  Portugal (Portuguese)
      •  Romania (Romanian)
      •  Russia (Russian)
      •  Slovakia (Slovak)
      •  Slovenia (Slovenian)
      •  Spain (Spanish)
      •  Sweden (Swedish)
      •  Switzerland(German, French)
      •  Turkey (Turkish)
      •  United Kingdom
      • Asia Pacific
      •  Australia
      •  China
      •  Hong Kong
      •  India
      •  Korea (Korean)
      •  Malaysia
      •  New Zealand
      •  Philippines
      •  Singapore
      •  Taiwan
      •  Thailand (Thai)
      • Americas
      •  Brazil (Portuguese)
      •  Canada
      •  Mexico (Spanish)
      •  United States
      Can't find the country/region you're looking for? Visit our export site or find a local distributor.
  • Translate
  • Profile
  • Settings
Autodesk EAGLE
  • Products
  • More
Autodesk EAGLE
EAGLE User Chat (English) DRC rules for specific board area or chip
  • Blog
  • Forum
  • Documents
  • Events
  • Polls
  • Files
  • Members
  • Mentions
  • Sub-Groups
  • Tags
  • More
  • Cancel
  • New
Join Autodesk EAGLE to participate - click to join for free!
Actions
  • Share
  • More
  • Cancel
Forum Thread Details
  • Replies 4 replies
  • Subscribers 172 subscribers
  • Views 234 views
  • Users 0 members are here
Related

DRC rules for specific board area or chip

cosborne2000
cosborne2000 over 13 years ago

Is there any way to create different DRC rules for specific areas or chips on a board?

 

For example, I would like to setup a large width on the ground net but this trace needs to neck down to connect to various chips.

Fine pitch devices also require a narrow trace width to connect.

 

Currently I have to approve all the errors on the fine pitch devices but is there a more efficient way?

  • Sign in to reply
  • Cancel
  • Former Member
    Former Member over 13 years ago

    cosborne2000 <communitymanager@premierfarnell.com> wrote:

    Is there any way to create different DRC rules for specific areas or chips on a board?

     

    For example, I would like to setup a large width on the ground net but

    this trace needs to neck down to connect to various chips.

    Fine pitch devices also require a narrow trace width to connect.

     

    Currently I have to approve all the errors on the fine pitch devices but

    is there a more efficient way?

     

     

    Have a look at classes.

     

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
  • cosborne2000
    cosborne2000 over 13 years ago in reply to Former Member

    Maybe there's a section I'm missing.

     

    For example: I want a 12 width/12 clearance rule for the GND net but I need an exception for the neck down on fine pitch or BGA packages.

    Is there any way I can avoid all the DRC errors that occur at the chip?

    If I set for the tighter rules for the chip then this rule applies to the whole board.

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
  • Former Member
    Former Member over 13 years ago in reply to cosborne2000

    cosborne2000 schrieb:

     

    For example: I want a 12 width/12 clearance rule for the GND net but

    I need an exception for the neck down on fine pitch or BGA packages.

    Is there any way I can avoid all the DRC errors that occur at the

    chip? If I set for the tighter rules for the chip then this rule

    applies to the whole board.

     

    "Exceptions" from the DRC settings are currently not supported/possible

    with EAGLE.

     

    In such situations, I normally use the coarser DRC settings for the

    board and then "accept" all DRC complaints in the fine pitch area since

    I know it's OK there. (To be sure, you yould run a "finepitch" DRC before.)

     

    Tilmann

     

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
  • cosborne2000
    cosborne2000 over 13 years ago in reply to Former Member

    Any idea if V6 will handle neck downs?

     

    With fine pitch high pin count chips you can have a long list of exceptions.  It wouldn't be a big deal but if I make any type of adjustment to the chip position the DRC exceptions don't follow.

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
element14 Community

element14 is the first online community specifically for engineers. Connect with your peers and get expert answers to your questions.

  • Members
  • Learn
  • Technologies
  • Challenges & Projects
  • Products
  • Store
  • About Us
  • Feedback & Support
  • FAQs
  • Terms of Use
  • Privacy Policy
  • Legal and Copyright Notices
  • Sitemap
  • Cookies

An Avnet Company © 2025 Premier Farnell Limited. All Rights Reserved.

Premier Farnell Ltd, registered in England and Wales (no 00876412), registered office: Farnell House, Forge Lane, Leeds LS12 2NE.

ICP 备案号 10220084.

Follow element14

  • X
  • Facebook
  • linkedin
  • YouTube