Data Sheet
June 1999
ORCA Series 2 FPGAs
Interquad Routing
between top and bottom quadrants. Since hIQ and vIQ
blocks have the same logic, only the hIQ block is
described below.
In all the ORCA Series 2 devices, the PLC array is split
into four equal quadrants. In between these quadrants,
routing has been added to route signals between the
quadrants, especially to the quadrant in the opposite
corner. The two types of interquad blocks, vertical and
horizontal, are pitch matched to PICs. Vertical inter-
quad blocks (vIQ) run between quadrants on the left
and right, while horizontal interquad blocks (hIQ) run
The interquad routing connects XL and XH lines. It
does not affect local routing (XSW, X1, X4, fast carry),
so local routing is the same, whether PLC-PLC con-
nections cross quadrants or not. There are no connec-
tions to the local lines in the interquad blocks. Figure 28
presents a (not to scale) view of interquad routing.
TMID
5
5 5 5
SEE
DETAIL IN
FIGURE 29
hIQ3[4:0]
hIQ2[4:0]
hIQ1[4:0]
hIQ0[4:0]
5
5
5
5
RMID
LMID
BMID
5-4538(F)
Figure 28. Interquad Routing
32
Lucent Technologies Inc.
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