EPF8282AV datasheet(17/62 Pages) ALTERA

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Altera Corporation

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.

Figure 9 shows the interconnection of four adjacent LABs, with row,

column, and local interconnects, as well as the associated cascade and

carry chains.

Table 4. FLEX 8000 FastTrack Interconnect Resources

Device

Rows

Channels per Row

Columns

Channels per Column

EPF8282A

EPF8282AV

168

EPF8452A

168

EPF8636A

168

EPF8820A

168

EPF81188A

168

EPF81500A

216

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