EP20K400CF672C7 Altera, EP20K400CF672C7 Datasheet - Page 9

• Manufacturer Part Number: EP20K400CF672C7
• Description: APEX 20KC
• Manufacturer: Altera

Altera Corporation
Figure 2. MegaLAB Structure
LAB or IOEs
To Adjacent
Interconnect
Local
MegaLAB Structure
APEX 20KC devices are constructed from a series of MegaLAB
structures. Each MegaLAB structure contains 16 logic array blocks (LABs),
one ESB, and a MegaLAB interconnect, which routes signals within the
MegaLAB structure. In EP20K1000C devices, MegaLAB structures
contain 24 LABs. Signals are routed between MegaLAB structures and
I/O pins via the FastTrack interconnect. In addition, edge LABs can be
driven by I/O pins through the local interconnect.
MegaLAB structure.
LE8
Logic Array Block
Each LAB consists of 10 LEs, the LEs’ associated carry and cascade chains,
LAB control signals, and the local interconnect. The local interconnect
transfers signals between LEs in the same or adjacent LABs, IOEs, or ESBs.
The Quartus II Compiler places associated logic within an LAB or adjacent
LABs, allowing the use of a fast local interconnect for high performance.
Figure 3
APEX 20KC devices use an interleaved LAB structure. This structure
allows each LE to drive two local interconnect areas, minimizing the use
of the MegaLAB and FastTrack interconnect and providing higher
performance and flexibility. Each LE can drive 29 other LEs through the
fast local interconnect.
LE1
LE2
LE3
LE4
LE5
LE6
LE7
LE9
LE10
shows the APEX 20KC LAB.
MegaLAB Interconnect
APEX 20KC Programmable Logic Device Data Sheet
LE2
LE3
LE4
LE5
LE7
LE8
LE9
LE10
LE1
LE6
LABs
LE8
LE1
LE2
LE3
LE4
LE5
LE6
LE7
LE9
LE10
Figure 2
shows the
TM
ESB
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