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

[arunkumar446]

Hi every one,

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

Thanks in advance.

 

[praveen.kumar432]

I know the ans but not clear.can any one help

 

[yadavvlsi]

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.