EP4SE530H40I3 Altera, EP4SE530H40I3 Datasheet - Page 112
EP4SE530H40I3
Manufacturer Part Number
EP4SE530H40I3
Description
IC STRATIX IV FPGA 530K 1517HBGA
Manufacturer
Altera
Series
STRATIX® IV Er
Datasheets
1.EP4SGX110DF29C3N.pdf
(80 pages)
2.EP4SGX110DF29C3N.pdf
(1154 pages)
3.EP4SGX110DF29C3N.pdf
(432 pages)
4.EP4SGX110DF29C3N.pdf
(22 pages)
5.EP4SGX110DF29C3N.pdf
(72 pages)
6.EP4SE230F29C3N.pdf
(12 pages)
Specifications of EP4SE530H40I3
Number Of Logic Elements/cells
531200
Number Of Labs/clbs
21248
Total Ram Bits
27376
Number Of I /o
976
Voltage - Supply
0.87 V ~ 0.93 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
1517-HBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
Available stocks
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ALTERA/阿尔特拉
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20 000
- EP4SGX110DF29C3N PDF datasheet
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- EP4SGX110DF29C3N PDF datasheet #3
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- EP4SGX110DF29C3N PDF datasheet #5
- EP4SE230F29C3N PDF datasheet #6
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4–32
Stratix IV Device Handbook Volume 1
Rounding and Saturation Mode
1
Rounding and saturation functions are often required in DSP arithmetic. Use
rounding to limit bit growth and its side effects; use saturation to reduce overflow and
underflow side effects.
Two rounding modes are supported in Stratix IV devices:
■
■
You must select one of these two options at compile time.
Round-to-nearest-integer provides the biased rounding support and is the simplest
form of rounding commonly used in DSP arithmetic. The round-to-nearest-even
method provides unbiased rounding support and is used where DC offsets are a
concern.
Table 4–6. Example of Round-To-Nearest-Even Mode
Table 4–7
6-bit input is rounded to 4 bits. The main difference between the two rounding
options is when the residue bits are exactly halfway between its nearest two integers
and the LSB is zero (even).
Table 4–7. Comparison of Round-to-Nearest-Integer and Round-to-Nearest-Even
Round-to-nearest-integer mode
Round-to-nearest-even mode
6- to 4-bits
Rounding
010111
001101
001010
001110
110111
101101
110110
110010
Table 4–6
lists examples of the difference between the two modes. In this example, a
Round-To-Nearest-Integer
010111
001101
001010
001110
110111
101101
110110
110010
lists how round-to-nearest-even works.
➱
➱
➱
➱
➱
➱
➱
➱
Even (0010)
Even (1100)
Odd (0011)
Odd (1101)
Odd/Even
0110
0011
0011
0100
1110
1011
1110
1101
(Integer)
x
x
x
x
Fractional
> 0.5 (11)
< 0.5 (01)
= 0.5 (10)
= 0.5 (10)
> 0.5 (11)
< 0.5 (01)
= 0.5 (10)
= 0.5 (10)
Chapter 4: DSP Blocks in Stratix IV Devices
Round-To-Nearest-Even
Add to Integer
Stratix IV Operational Mode Descriptions
010111
001101
001010
001110
110111
101101
110110
110010
February 2011 Altera Corporation
1
0
0
1
1
0
1
0
➱
➱
➱
➱
➱
➱
➱
➱
0110
0011
0010
0100
1110
1011
1110
1100
Result
0110
0011
0010
0100
1110
1011
1110
1100
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