global routing and detail routing

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Vijay
Posts: 25
Joined: Sun Apr 13, 2014 1:39 pm
Location: Bangalore, India

global routing and detail routing

Post by Vijay » Sat May 10, 2014 1:31 pm

Routing is done in two steps, global routing & detail routing. What is the difference between global routing & detail routing?

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Narveer
Posts: 59
Joined: Tue Apr 08, 2014 11:29 am
Location: Bangalore, INDIA

Re: global routing and detail routing

Post by Narveer » Sat May 10, 2014 6:57 pm

The routing problem is typically solved using a two step approach:
Global Routing:
• Define the routing regions.
• Generate a tentative route for each net.
• Each net is assigned to a set of routing regions.
• Does not specify the actual layout of wires.

Detailed Routing:
• For each routing region, each net passing through that region is assigned particular routing tracks.
• Actual layout of wires gets fixed.
• Associated subproblems: channel routing and switchbox routing.

http://cc.ee.ntu.edu.tw/~ywchang/Course ... outing.pdf
http://www.facweb.iitkgp.ernet.in/~isg/ ... outing.pdf

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