EX128-CS100A datasheet(6/44 Pages) ACTEL

6 / 44 page

eX Automotive Family FPGAs

1- 2

v3.2

Module Organization

C-cell and R-cell logic modules are arranged into

horizontal banks called Clusters, each of which contains

two C-cells and one R-cell in a C-R-C configuration.

Clusters are further organized into modules called

SuperClusters for improved design efficiency and device

performance, as shown in Figure 1-3 on page 1-3. Each

SuperCluster is a two-wide grouping of Clusters.

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 on page 1-3). 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 hardwired

signal path requiring no programmable interconnection to

achieve its fast signal propagation time of less than 0.1 ns.

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 0.6 ns.

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 1-2 • C-Cell

A0 B0

A1 B1

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