EP2AGX65DF29C6N Altera, EP2AGX65DF29C6N Datasheet - Page 36
EP2AGX65DF29C6N
Manufacturer Part Number
EP2AGX65DF29C6N
Description
IC ARRIA II GX FPGA 65K 780FBGA
Manufacturer
Altera
Series
Arria II GXr
Datasheets
1.EP2AGX45CU17C6N.pdf
(96 pages)
2.EP2AGX45CU17C6N.pdf
(14 pages)
3.EP2AGX45CU17C6N.pdf
(692 pages)
4.EP2AGX45CU17C6N.pdf
(10 pages)
5.EP2AGX45CU17C6N.pdf
(88 pages)
6.EP2AGX65DF29C6N.pdf
(306 pages)
Specifications of EP2AGX65DF29C6N
Number Of Logic Elements/cells
60214
Number Of Labs/clbs
2530
Total Ram Bits
5246
Number Of I /o
364
Voltage - Supply
0.87 V ~ 0.93 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
780-FBGA
Family Name
Arria® II GX
Number Of Logic Blocks/elements
63250
# I/os (max)
364
Frequency (max)
400MHz
Operating Supply Voltage (typ)
900mV
Logic Cells
63250
Ram Bits
5557452.8
Operating Supply Voltage (min)
0.87V
Operating Supply Voltage (max)
0.93V
Operating Temp Range
0C to 85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
780
Package Type
FC-FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP2AGX65DF29C6N
Manufacturer:
ST
Quantity:
12 000
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2–10
Figure 2–9. ALM in Shared Arithmetic Mode
Arria II GX Device Handbook, Volume 1
datae0
datae1
datac
datab
dataa
datad
Shared Arithmetic Mode
In shared arithmetic mode, the ALM can implement a three-input add in an ALM. In
this mode, the ALM is configured with 4 four-input LUTs. Each LUT either computes
the sum of three inputs or the carry of three inputs. The output of the carry
computation is fed to the next adder using a dedicated connection called the shared
arithmetic chain. This shared arithmetic chain can significantly improve the
performance of an adder tree by reducing the number of summation stages required
to implement an adder tree.
Shared Arithmetic Chain
The shared arithmetic chain available in enhanced arithmetic mode allows the ALM
to implement a three-input add. This significantly reduces the resources necessary to
implement large adder trees or correlator functions.
The shared arithmetic chains can begin in either the first or sixth ALM in an LAB. The
Quartus II Compiler creates shared arithmetic chains longer than 20 ALMs (10 ALMs
in arithmetic or shared arithmetic mode) by linking LABs together automatically. For
enhanced fitting, a long shared arithmetic chain runs vertically, allowing fast
horizontal connections to memory and DSP blocks. A shared arithmetic chain can
continue as far as a full column.
Similar to the carry chains, the top and bottom half of shared arithmetic chains in
alternate LAB columns can be bypassed. This capability allows the shared arithmetic
chain to cascade through half of the ALMs in an LAB while leaving the other half
available for narrower fan-in functionality. Every other LAB column is top-half
bypassable, while the other LAB columns are bottom-half bypassable.
4-Input
4-Input
4-Input
4-Input
LUT
LUT
LUT
LUT
shared_arith_out
shared_arith_in
Chapter 2: Logic Array Blocks and Adaptive Logic Modules in Arria II GX Devices
Figure 2–9
carry_out
carry_in
shows the ALM using this feature.
labclk
D
D
reg0
reg1
Q
Q
To general or
To general or
To general or
To general or
local routing
local routing
local routing
local routing
© June 2009 Altera Corporation
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