EP2S90F1020C4N Datasheet, PDF (34/238 Pages) Altera Corporation – The Stratix II family offers the following features

MultiTrack Interconnect
Figure 2–18. C4 Interconnect Connections Note (1)
Row
Interconnect
Adjacent LAB can
drive onto neighboring
LAB's C4 interconnect
Local
Interconnect
Note to Figure 2–18:
(1) Each C4 interconnect can drive either up or down four rows.
2–26
Stratix II Device Handbook, Volume 1
C4 Interconnect
Drives Local and R4
Interconnects
up to Four Rows
C4 Interconnect
Driving Up
LAB
C4 Interconnect
Driving Down
Altera Corporation
May 2007