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參數(shù)資料
| 型號(hào)： | fft_on_chip |
| 廠商： | Altera Corporation |
| 英文描述： | Fast Fourier Transform(傅立葉變換) |
| 中文描述： | 快速傅里葉變換（傅立葉變換） |
| 文件頁(yè)數(shù)： | 2/4頁(yè) |
| 文件大?。?/td> | 155K |
| 代理商： | FFT_ON_CHIP |
2
Altera Corporation
FS 5: round Data Word Rounder
The
rounds it to a smaller bit-width by truncating the number and adding a 1
to the number, if appropriate. Also, the architecture of the FLEX logic cells
allows the
round
function to add the rounded number to another number
without increasing logic usage.
round
reference design accepts any bit-width number and properly
Function Prototype
The Altera Hardware Description Language (AHDL) Function Prototype
for the
round
function is shown below:
FUNCTION round (dataa[(WIDTHI–1)..0],
datab[(WIDTHR–1)..0]
WITH (WIDTHI, REPRESENTATION, WIDTHR)
RETURNS (result[(WIDTHR–1)..0], cout, overflow);
Parameters
Table 1
shows the parameters for the
round
function.
Ports
Table 2
shows the ports for the
round
function.
Table 1. round Parameters
Name
Value
Description
WIDTHI
Integers only
Width of input data
Sign of the input data. The default value
is
"UNSIGNED"
Width of output data (<
REPRESENTATION
"SIGNED"
"UNSIGNED"
Integers only
WIDTHR
WIDTHI
)
Table 2. round Ports
Name
Type
Description
dataa[(WIDTHI–1)..0]
Input
Input
Output
Output
Output
Input data
Sum data
Rounded output data
Carry out
Overflow
datab[(WIDTHR–1)..0]
result[(WIDTH–1)..0]
cout
overflow
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