EPM570 Altera, EPM570 Datasheet - Page 22

• Manufacturer Part Number: EPM570
• Description: MAX II Device Family
• Manufacturer: Altera

MultiTrack Interconnect
Figure 2–10. R4 Interconnect Connections
Notes to
(1)
(2)
2–16
MAX II Device Handbook, Volume 1
C4 interconnects can drive R4 interconnects.
This pattern is repeated for every LAB in the LAB row.
Figure
2–10:
R4 Interconnect
Driving Left
The R4 interconnects span four LABs and are used for fast row
connections in a four-LAB region. Every LAB has its own set of R4
interconnects to drive either left or right.
interconnect connections from an LAB. R4 interconnects can drive and be
driven by row IOEs. For LAB interfacing, a primary LAB or horizontal
LAB neighbor can drive a given R4 interconnect. For R4 interconnects that
drive to the right, the primary LAB and right neighbor can drive on to the
interconnect. For R4 interconnects that drive to the left, the primary LAB
and its left neighbor can drive on to the interconnect. R4 interconnects can
drive other R4 interconnects to extend the range of LABs they can drive.
R4 interconnects can also drive C4 interconnects for connections from one
row to another.
Adjacent LAB can
Drive onto Another
LAB's R4 Interconnect
Core Version a.b.c variable
Neighbor
LAB
Primary
LAB (2)
C4 Column Interconnects (1)
Neighbor
LAB
Figure 2–10
R4 Interconnect
Driving Right
shows R4
Altera Corporation
December 2004