EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 43

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Introduction
MultiTrack
Interconnect
Altera Corporation-Preliminary
March 2007
CIII51004-1.0
This Cyclone
Devices, provides in-depth information about the routing architecture of
Cyclone III devices. This document explains the connections between
each functional block in Cyclone III devices.
In the Cyclone III device architecture, connections between LEs,
M9K memory blocks, embedded multipliers, and device I/O pins are
provided by the MultiTrack interconnect structure with DirectDrive
technology. The MultiTrack interconnect consists of continuous,
performance-optimized routing lines of different speeds used for
inter- and intra-design block connectivity. The Quartus
automatically places critical paths on faster interconnects to improve
design performance.
DirectDrive technology is a deterministic routing technology that ensures
identical routing resource usage for any function regardless of placement
within the device. The MultiTrack interconnect and DirectDrive
technology simplify the integration stage of block-based designing by
eliminating the re-optimization cycles that typically follow design
changes and additions.
The MultiTrack interconnect consists of row (direct link, R4, and R24) and
column (register chain, C4, and C16) interconnects that span fixed
distances. A routing structure with fixed-length resources for all devices
allows predictable and repeatable performance when migrating through
different device densities.
®
III handbook chapter, MultiTrack Interconnect in Cyclone III
3. MultiTrack Interconnect in
Cyclone III Devices
®
II Compiler
Preliminary
™
3–1