EX128-CS100PP datasheet(7/49 Pages) ACTEL

7 / 49 page

eX Family FPGAs

v4.3

1-3

Routing Resources

Clusters and SuperClusters can be connected through the

use of two innovative local routing resources called

FastConnect and DirectConnect, which enable extremely

fast and predictable interconnection of modules within

Clusters and SuperClusters (Figure 1-4). This routing

architecture also dramatically reduces the number of

antifuses required to complete a circuit, ensuring the

highest possible performance.

DirectConnect is a horizontal routing resource that

provides connections from a C-cell to its neighboring R-

cell in a given SuperCluster. DirectConnect uses a hard-

wired

signal

path

requiring

programmable

interconnection to achieve its fast signal propagation

time of less than 0.1 ns (–P speed grade).

FastConnect enables horizontal routing between any

two logic modules within a given SuperCluster and

vertical routing with the SuperCluster immediately

below it. Only one programmable connection is used in a

FastConnect

path,

delivering

maximum

pin-to-pin

propagation of 0.3 ns (–P speed grade).

In addition to DirectConnect and FastConnect, the

architecture makes use of two globally oriented routing

resources known as segmented routing and high-drive

routing. Actel’s segmented routing structure provides a

variety of track lengths for extremely fast routing

between SuperClusters. The exact combination of track

lengths and antifuses within each path is chosen by the

fully automatic place-and-route software to minimize

signal propagation delays.

Figure 1-4 • DirectConnect and FastConnect for SuperClusters

SuperClusters

DirectConnect

• No antifuses

• 0.1 ns routing delay

FastConnect

• One antifuse

• 0.5 ns routing delay

Routing Segments

• Typically 2 antifuses

• Max. 5 antifuses

EX128-CS100PP Datasheet(PDF) 7 Page - Actel Corporation

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