|
|
Purpose of No Probe Top and DFA Top |
Post Reply 
|
| Author | |
ANANDT 
New User 
Joined: 30 Apr 2022 Status: Offline Points: 2 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: Purpose of No Probe Top and DFA TopPosted: 27 Jun 2022 at 9:13pm |
|
Hi,
I'm currently working with Allegro, please explain the purpose of No probe TOP why do we need to add one for our footprint. Next if we create a standard footprint using Allegro Footprint wizard it creates Place Bound Top along with DFA Top how one differs from another and purpose of it. Please explain. |
|
 |
|
|
|
|
Tom H
Admin Group 
Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718 |
Post Options
Thanks(0)
Quote Reply
Posted: 28 Jun 2022 at 8:35am |
|
I'm not an expert on the Allegro CAD tool, but I am familiar with the terms.
You would use a "No probe TOP" feature if you're using Test Points. They cannot be placed under a footprint because they need to be Probed. The No probe TOP feature throws a DRC error if a Test Point is in the No Probe area. Also, Allegro has a feature for auto-placing test points. That feature will avoid all No probe TOP areas. Place Bound Top is used to establish a part placement area. You set spacing rules for each component footprint. If you violate the Place Bound spacing rules Allegro throws a DRC error. Other CAD tools that have less features use a Placement Courtyard boundary outline as a guide for part placement. |
|
|
|
|
Post Reply
|
|
| Tweet |
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options