EP2AGX95EF29C6N Datasheet, PDF (38/380 Pages) Altera Corporation – Device Interfaces and Integration

2–8
Chapter 2: Logic Array Blocks and Adaptive Logic Modules in Arria II Devices
Adaptive Logic Modules
Normal Mode
Normal mode is suitable for general logic applications and combinational functions.
In this mode, up to eight data inputs from the LAB local interconnect are inputs to the
combinational logic. Normal mode allows two functions to be implemented in one
Arria II ALM, or a single function of up to six inputs. The ALM can support certain
combinations of completely independent functions and various combinations of
functions that have common inputs.
Figure 2–7 shows the supported LUT combinations in normal mode.
Figure 2–7. ALM in Normal Mode (Note 1)
dataf0
datae0
datac
dataa
datab
datad
datae1
dataf1
4-Input
LUT
4-Input
LUT
combout0
dataf0
datae0
datac
dataa
datab
combout1
datad
datae1
dataf1
5-Input
LUT
combout0
5-Input
LUT
combout1
dataf0
datae0
datac
dataa
datab
datad
datae1
dataf1
dataf0
datae0
datac
dataa
datab
datad
datae1
dataf1
5-Input
LUT
3-Input
LUT
5-Input
LUT
combout0
combout1
dataf0
datae0
dataa
datab
datac
datad
combout0
dataf0
datae0
dataa
datab
datac
datad
4-Input
LUT
combout1
datae1
dataf1
6-Input
LUT
combout0
6-Input
LUT
combout0
6-Input
LUT
combout1
Note to Figure 2–7:
(1) 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, and 5 and 2.
Normal mode provides complete backward-compatibility with 4-input LUT
architectures.
Arria II Device Handbook Volume 1: Device Interfaces and Integration
December 2010 Altera Corporation