MultiTrack Interconnect
Figure 2–10. LUT Chain & Register Chain Interconnects
Local Interconnect
Routing Among LEs
in the LAB
LE 1
LUT Chain
Routing to
Adjacent LE
Register Chain
Routing to Adjacent
LE's Register Input
LE 2
LE 3
LE 4
LE 5
LE 6
LE 7
LE 8
LE 9
Local
Interconnect
LE 10
The C4 interconnects span four LABs or M4K blocks up or down from a
source LAB. Every LAB has its own set of C4 interconnects to drive either
up or down. Figure 2–11 shows the C4 interconnect connections from an
LAB in a column. The C4 interconnects can drive and be driven by all
types of architecture blocks, including PLLs, M4K memory blocks, and
column and row IOEs. For LAB interconnection, a primary LAB or its
LAB neighbor can drive a given C4 interconnect. C4 interconnects can
drive each other to extend their range as well as drive row interconnects
for column-to-column connections.
Altera Corporation
January 2007
2–15
Preliminary
ALTERA [ ALTERA CORPORATION ]
