EP2S15 ALTERA [Altera Corporation], EP2S15 Datasheet - Page 19

• Manufacturer Part Number: EP2S15
• Description: Stratix II Device Family
• Manufacturer: ALTERA [Altera Corporation]

Figure 2–7. ALM in Normal Mode
Note to
(1)
Altera Corporation
May 2007
datae0
datae1
datae0
datae1
datae0
datae1
dataf0
dataf1
dataf0
dataf1
dataf0
dataf1
dataa
datab
datad
datac
dataa
datab
datad
datac
dataa
datab
datad
datac
Combinations of functions with fewer inputs than those shown are also supported. For example, combinations of
functions with the following number of inputs are supported: 4 and 3, 3 and 3, 3 and 2, 5 and 2, etc.
Figure
2–7:
3-Input
LUT
4-Input
5-Input
5-Input
4-Input
4-Input
LUT
LUT
LUT
LUT
LUT
The normal mode provides complete backward compatibility with four-
input LUT architectures. Two independent functions of four inputs or less
can be implemented in one Stratix II ALM. In addition, a five-input
function and an independent three-input function can be implemented
without sharing inputs.
Note (1)
combout0
combout1
combout0
combout1
combout0
combout1
datae0
datae1
datae0
datae0
datae1
dataf0
dataf1
dataf0
dataf0
dataf1
dataa
datab
datad
dataa
datab
datad
dataa
datab
datad
datac
datac
datac
Stratix II Device Handbook, Volume 1
6-Input
6-Input
6-Input
5-Input
5-Input
LUT
LUT
LUT
LUT
LUT
Stratix II Architecture
combout0
combout1
combout0
combout0
combout1
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