ep2s130 Altera Corporation, ep2s130 Datasheet - Page 21

• Manufacturer Part Number: ep2s130
• Description: Stratix Ii Device Family Data Sheet
• Manufacturer: Altera Corporation

Altera Corporation
May 2007
datae1 and dataf1 are utilized, the output drives to register1
and/or bypasses register1 and drives to the interconnect using the
bottom set of output drivers. The Quartus II Compiler automatically
selects the inputs to the LUT. Asynchronous load data for the register
comes from the datae or dataf input of the ALM. ALMs in normal
mode support register packing.
Figure 2–9. 6-Input Function in Normal Mode
Notes to
(1)
(2)
Extended LUT Mode
The extended LUT mode is used to implement a specific set of
seven-input functions. The set must be a 2-to-1 multiplexer fed by two
arbitrary five-input functions sharing four inputs.
template of supported seven-input functions utilizing extended LUT
mode. In this mode, if the seven-input function is unregistered, the
unused eighth input is available for register packing.
Functions that fit into the template shown in
in designs. These functions often appear in designs as “if-else” statements
in Verilog HDL or VHDL code.
datae0
datae1
dataf0
dataf1
dataa
datab
datad
datac
(2)
If datae1 and dataf1 are used as inputs to the six-input function, then datae0
and dataf0 are available for register packing.
The dataf1 input is available for register packing only if the six-input function is
un-registered.
These inputs are available for register packing.
Figure
2–9:
6-Input
LUT
Stratix II Device Handbook, Volume 1
Notes
Figure 2–10
D
D
reg0
reg1
(1),
Figure 2–10
Q
Q
Stratix II Architecture
(2)
occur naturally
To general or
local routing
To general or
local routing
To general or
local routing
shows the
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