Altera Stratix - Multitrack Interconnect

Altera Corporation 10–3
July 2005 Stratix Device Handbook, Volume 2
Transitioning APEX Designs to Stratix & Stratix GX Devices
cascade primitives in APEX II and APEX 20K designs to a wire primitive
when compiled for Stratix and Stratix GX devices. These architectural
changes are transparent to the user and do not require design changes.
Figure 10–1. Carry Chain Implementation in APEX II & APEX 20K Devices vs.
Stratix & Stratix GX Devices
MultiTrack Interconnect
Stratix and Stratix GX devices use the MultiTrack interconnect structure
to provide a high-speed connection between logic resources using
performance-optimized routing channels of different lengths. This
feature maximizes overall design performance by placing critical paths
on routing lines with greater speed, resulting in minimal propagation
delay.
LABs (with 10 LEs Each)
Carry Chains
APEX II & APEX 20K Devices Stratix Devices
Carry-Selec
t
Chains