S0
Routed
Data Input S1
PRE
DirectConnect
Input
D
Q
Y
HCLK
CLKA,
CLKB,
Internal Logic
CKS
Figure 1-2 •
R-Cell
CLR
CKP
D0
D1
Y
D2
D3
Sa
Sb
DB
A0
Figure 1-3 •
C-Cell
B0
A1
B1
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
and
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 a maximum pin-to-pin
propagation time of 0.5 ns.
v2.2
1-3
ACTEL [ Actel Corporation ]
