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what is Global Route, Track Assign, Detailed Route & G-C

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arunkumar446

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Hi every one,

Can anyone help me understand what is global route, track assign, detailed route and g-cells.

Thanks in advance.
 

yadavvlsi

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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.

G-cells:
To perform wire routing, EDA tools divide a system-on-chip into grid cells or “g-cells”. These cells may also be called “bins” or “global routing tiles”. Each g-cell only accommodates a finite number of routing wires.
 
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