A54SX16-1CG256 ACTEL [Actel Corporation], A54SX16-1CG256 Datasheet - Page 10

• Manufacturer Part Number: A54SX16-1CG256
• Description: SX Family FPGAs RadTolerant and HiRel
• Manufacturer: ACTEL [Actel Corporation]

Routing Resources
Clusters and SuperClusters can be connected through the
use of two innovative local routing resources called
FastConnect and DirectConnect that enable extremely
fast and predictable interconnections of modules within
Clusters and SuperClusters (see
on page
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.
Figure 1-6 • DirectConnect and FastConnect for Type 1 SuperClusters
1 -6
SX Family FPGAs RadTolerant and HiRel
1-7). This routing architecture also dramatically
Type 1 SuperClusters
Figure 1-6
and
Figure 1-7
v2.1
FastConnect enables horizontal routing between any
two logic modules within a given SuperCluster, and
vertical routing to the SuperCluster immediately below
it. Only one programmable connection is used in a
FastConnect path, delivering a maximum pin-to-pin
propagation of 0.4 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
100% automatic place-and-route software to minimize
signal propagation delays.
DirectConnect
• No Antifuses
FastConnect
• One Antifuse
Routing Segments
• Typically Two Antifuses
• Max. Five Antifuses