EP1S80B956C7N Altera, EP1S80B956C7N Datasheet - Page 616
EP1S80B956C7N
Manufacturer Part Number
EP1S80B956C7N
Description
IC STRATIX FPGA 80K LE 956-BGA
Manufacturer
Altera
Series
Stratix®r
Datasheet
1.EP1S10F484I6N.pdf
(864 pages)
Specifications of EP1S80B956C7N
Number Of Logic Elements/cells
79040
Number Of Labs/clbs
7904
Total Ram Bits
7427520
Number Of I /o
683
Voltage - Supply
1.425 V ~ 1.575 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
956-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
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Infinite Impulse Response (IIR) Filters
7–38
Stratix Device Handbook, Volume 2
The first DSP block in
adder mode, and the second DSP block is in the four-multipliers adder
mode. For an 18-bit input to the IIR filter, each biquad requires five
multipliers and five adders (two DSP blocks). One of the adders is
implemented using logic elements. Cascading several biquads together
can implement more complex, higher order IIR filters. It is possible to
insert registers in between the biquad stages to improve the performance.
Figure 7–23
biquads in three DSP blocks.
Figure 7–23. Two Cascaded Biquads
a
x[n]
a
a
a
b
b
b
b
a
a
10
20
21
11
12
11
12
21
22
22
shows a 4
Four-multipliers
adder mode
Four-multipliers
adder mode
Two-multipliers
adder mode
th
Figure 7–22
order IIR filter realized using two cascaded
block 3
block 1
block 2
DSP
DSP
DSP
is configured in the two-multipliers
Altera Corporation
September 2004
Second
biquad
biquad
First
y[n]
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