ep3c120f780c8nes Altera Corporation, ep3c120f780c8nes Datasheet - Page 45

• Manufacturer Part Number: ep3c120f780c8nes
• Description: Cyclone Iii Device Family
• Manufacturer: Altera Corporation

Figure 3–1. R4 Interconnect Connections
Notes to
(1)
(2)
(3)
Altera Corporation-Preliminary
March 2007
The C4 interconnects can drive R4 interconnects.
This pattern is repeated for every LAB in the LAB row.
The R24 row interconnects span 24 LABs and provide the fastest resource for long row connections between
non-adjacent LABs, M9K memory blocks, dedicated multipliers, and row IOEs. R24 row interconnects drive to other
row or column interconnects at every fourth LAB. R24 row interconnects drive LAB local interconnects via R4 and
C4 interconnects and do not drive directly to LAB local interconnects. R24 interconnects can drive R24, R4, C16, and
C4 interconnects.
Figure
3–1:
R4 Interconnect
Driving Left
Column Interconnects
The column interconnect operates similar to the row interconnect. Each
column of LABs is served by a dedicated column interconnect, which
vertically routes signals to and from LABs, M9K memory blocks,
embedded multipliers, and row and column I/O elements. These column
resources include:
■
■
■
Register chain interconnects within a LAB
C4 interconnects traversing a distance of four blocks in an
up or down direction
C16 interconnects for high-speed vertical routing through
the device
Adjacent LAB can
Drive onto Another
LAB's R4 Interconnect
Neighbor
LAB
Notes
(1), (2),
Primary
LAB (2)
(3)
C4 Column Interconnects (1)
Neighbor
LAB
Cyclone III Device Handbook, Volume 1
R4 Interconnect
Driving Right
MultiTrack Interconnect
3–3