EP2S30F484C4 Altera, EP2S30F484C4 Datasheet - Page 27
EP2S30F484C4
Manufacturer Part Number
EP2S30F484C4
Description
IC STRATIX II FPGA 30K 484-FBGA
Manufacturer
Altera
Series
Stratix® IIr
Datasheet
1.EP2S15F484I4N.pdf
(238 pages)
Specifications of EP2S30F484C4
Number Of Logic Elements/cells
33880
Number Of Labs/clbs
1694
Total Ram Bits
1369728
Number Of I /o
342
Voltage - Supply
1.15 V ~ 1.25 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
484-FBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
Other names
544-1106
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP2S30F484C4N
Manufacturer:
ALTERA
Quantity:
3 000
Part Number:
EP2S30F484C4N
Manufacturer:
ALTERA/阿尔特拉
Quantity:
20 000
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Figure 2–14. Example of a 3-bit Add Utilizing Shared Arithmetic Mode
Altera Corporation
May 2007
3-Bit Add Example
implemented in adders.
implemented in LUTs.
+
2nd stage add is
1st stage add is
1 1 0 1
1 1 0
+
Binary Add
1 1 0
1 0 1
0 1 0
0 0 1
+
C2 C1 C0
R3 R2 R1 R0
Shared Arithmetic Chain
In addition to the dedicated carry chain routing, the shared arithmetic
chain available in shared 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 fifth ALM in
an LAB. The Quartus II Compiler creates shared arithmetic chains longer
than 16 (8 ALMs in arithmetic or shared arithmetic mode) by linking
LABs together automatically. For enhanced fitting, a long shared
+
+
Equivalents
Decimal
X2 X1 X0
S2 S1 S0
2 x 6
Y2 Y1 Y0
Z2 Z1 Z0
+
13
6
5
2
1
X0
Y0
Z0
X1
Y1
Z1
X2
Y2
Z2
ALM Implementation
ALM 1
ALM 2
3-Input
3-Input
3-Input
3-Input
3-Input
3-Input
3-Input
3-Input
LUT
LUT
LUT
LUT
LUT
LUT
LUT
LUT
Stratix II Device Handbook, Volume 1
S0
C0
S1
C1
S2
C2
shared_arith_in = '0'
'0'
carry_in = '0'
Stratix II Architecture
R0
R1
R2
R3
2–19
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