怎样设置一个局部的布线约束？

wader

各位大侠，因为主处理芯片BGA封装，需要走比较细的线，而其它部分又想把线及间距拉大点，局部能单独设置布线约束吗？谢谢！

jijiwaiwaihaha

constraint area

wader

谢谢二楼！问题是不知道给怎么设置constraint area？希望哪位大侠能不吝赐教！谢谢！

wader

How to set up a constraint region in 16.2.
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Lets say we want to create a spacing region:

- D8 ]; p0 o, `* Y6 U. m( H2 n+ ~/ ~Open constraint manager and create a Spacing Rule set for the constraint region.
. s0 W4 F$ [1 s" Q2 v1. Open Constraint Manager on the board file.
2. Select Spacing > All Layers worksheet
3. RMB on the Objects and select Create Spacing CSet
4. Type the name of Spacing CSet and change the pin to pin constraints that allow
( x- B# o$ l2 Z7 Z% h' Q7 d# \pin to pin spacing for the 'special' component.

1 ~8 \1 d# ~; B' u/ qNow create a region and assign a spacing CSet to the region.
1. In Constraint Manager, select Region > All Layers
2. RMB > Create Region
7 s6 J. y5 d5 R( D1 y3. Give a name to the region, and select Ok.
( Q. q. }6 a; [1 [4. On the Region worksheet, select the region that you just created, and assign
7 B- X, o2 [2 F7 J8 V; i) |the Spacing CSet that you had created in the previous step. The rules of the
spacing CSet are automatically taken over by the Region.
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Now create a Shape on Constraint Area subclass and assign the region rules to it.
1. On Allegro, Select Shape > Polygon or Rectangular.
2. In the Options panel on the Right hand side, select the Class as Constraint
Region > All.
: e  s7 O! m  P3. From the drop down in the options panel, select the Region you had defined in
, I( j0 f* }+ `: n9 \) ethe previous step.
* O! q! Y' e5 T8 R4. Draw the rectangle or polygon around the component.

hzhfinger

" m. N& ]6 J+ c; _( @& {# I2 Isetup->constraints,在弹出对话框内的constraints areas单击add按钮，在电路板上做出需要做约束的区域，单击add对话框下面的attach propperty,shape按钮，在FIND中选择SHAPE，单击刚刚做好的约束区域，在弹出的EDIT PROPERTY对话框的AVIAILABLE PROPERTY中选择NET PHYSICAL_TYPE并添加属性，单击APPLY完成。
接下来在setup->constraints,在弹出对话框内的PHYSICAL RULE SET中设置物理属性，再到physiacl RULE  ASSIGNMENT TABLE中将刚刚建好的规则分配给你做好的约束的区域就OK了