EPF8452ATC100-4N Datasheet, PDF (17/62 Pages) Altera Corporation – Programmable Logic Device Family

FLEX 8000 Programmable Logic Device Family Data Sheet
Each LE in an LAB can drive up to two separate column interconnect
channels. Therefore, all 16 available column channels can be driven by the
LAB. The column channels run vertically across the entire device, and
share access to LABs in the same column but in different rows. The
MAX+PLUS II Compiler chooses which LEs must be connected to a
column channel. A row interconnect channel can be fed by the output of
the LE or by two column channels. These three signals feed a multiplexer
that connects to a specific row channel. Each LE is connected to one 3-to-1
multiplexer. In an LAB, the multiplexers provide all 16 column channels
with access to 8 row channels.
Each column of LABs has a dedicated column interconnect that routes
signals out of the LABs into the column. The column interconnect can then
drive I/O pins or feed into the row interconnect to route the signals to
other LABs in the device. A signal from the column interconnect, which
can be either the output of an LE or an input from an I/O pin, must
transfer to the row interconnect before it can enter an LAB. Table 4
summarizes the FastTrack Interconnect resources available in each
FLEX 8000 device.
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Table 4. FLEX 8000 FastTrack Interconnect Resources
Device
EPF8282A
EPF8282AV
EPF8452A
EPF8636A
EPF8820A
EPF81188A
EPF81500A
Rows
2
2
3
4
6
6
Channels per Row
168
168
168
168
168
216
Columns Channels per Column
13
16
21
16
21
16
21
16
21
16
27
16
Figure 9 shows the interconnection of four adjacent LABs, with row,
column, and local interconnects, as well as the associated cascade and
carry chains.
Altera Corporation
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