[PCB_FORUM] Re: Constraint Region in 16.01
- From: "John Schiavone" <johnsc@xxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Thu, 21 May 2009 09:58:14 -0400
The pin you selected, C48.1, is on net SOC1_8. From the Show
Constraints report, I can see that this net is not a member of the
PWR_GND NetClass (or any NetClass). Only nets that are members of the
PWR_GND NetClass AND routed within the BGA_BGA Region will be routed
with a 20 mil line width.
________________________________
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Joe.witten
Sent: Wednesday, May 20, 2009 10:04 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Constraint Region in 16.01
I've got the shape assigned and works as far as getting the
4.75mil traces to route at 4mils. But this is making the PWR_GND route
at 4mils also. That's why I thought by adding the Region-Class PWR_GND
and assigning the referenced Cset of PWR_GND I'd get a 20mil trace.
This is what the Display constraints window is showing:
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Ed Hickey
Sent: Wednesday, May 20, 2009 4:01 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Constraint Region in 16.01
Is the Region shape assigned to the Region Constraint
Object?
In the PCB Editor, select the Region shape with the
shape select command then check the options panel field "Assign to
Region" for the Region constraint object.
One other tip - use the Display - Constraint command to
determine how Allegro resolves physical and spacing constraints
1 pick on the cline for physical info; window around 2
clines for spacing
________________________________
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Joe.witten
Sent: Wednesday, May 20, 2009 12:57 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Constraint Region in 16.01
I am trying to set a physical rule that allows a
4mil trace in a BGA region, but still forces a 20mil trace on all power
nets. I've got physical constraints set up for BGA=4mils and
PWR_GND=20mils. This still wants to route at mils. What am I doing
wrong?
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