Switch Block Background
Three switch block types...
- disjoint (Xilinx)
- has structure, easy to layout
- simple: net on track t always stays on track t
- universal
- has structure, easy to layout
- routable: isolated switch blocks
can route any valid set of 2-point nets
- Wilton
- no structure? hard to layout?
- most routable: net on track t
changes to track t+1 or W-t-1
during a turn
- call this diversity
Comments:
- all have similar area per track
- Wilton requires fewest tracks
- how to increase diversity?
- is diversity good?
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