Regions in floorplan

[ramesh28]

Hello all,

For what purpose regions have been created during floorplan? What are the advantages of regions? How can we assign cells to particular regions and which cells? how to decide that?

Thank you.

 

[kapil_vlsi1]

Regions are basically created to make sure the cells of the same hierarchy, and connectivity through flylines are placed inside the regions so that the timing does not get impacted. Advantage is that cells of the same hierarchy are placed together in a cluster/region thereby reducing timing issues and congestion.

Its decided through checking the connectivity of macros and standard cells and also to check the hierarchy of floorplan using hierarchy browser.

 

[ramesh28]

Regions are basically created to make sure the cells of the same hierarchy, and connectivity through flylines are placed inside the regions so that the timing does not get impacted. Advantage is that cells of the same hierarchy are placed together in a cluster/region thereby reducing timing issues and congestion.

Its decided through checking the connectivity of macros and standard cells and also to check the hierarchy of floorplan using hierarchy browser.

Hi kapil_vlsi1,

Can you explain these some of region properties like hard_region, member_hard, nonmember_hard, member_route_fence, nonmember_route_fence etc.

thanks.

 

[kapil_vlsi1]

Regions are ones where cells of other modules are allowed in the designated area whereas fence are ones other module cells are not allowed inside the designated area. So, if you know the meanings of hard and soft blockages/macros you can understand the meanings of these terms... hard_region, member_hard, nonmember_hard, member_route_fence, nonmember_route_fence etc.

Hope this helps..

 

[alam4vlsi]

Hi,
For more information about blockages, Halos, Visit www.vlsi-basics.com/2013/08/blockages-and-halos.html

 

[ramesh28]

Thanx guys for replys..