參數(shù)資料
型號(hào)： HSP43891JC-30
廠商： INTERSIL CORP
元件分類： 數(shù)字信號(hào)處理外設(shè)
英文描述： Digital Filter
中文描述： 9-BIT, DSP-DIGITAL FILTER, PQCC84
封裝： PLASTIC, LCC-84
文件頁數(shù)： 11/18頁
文件大小： 142K
代理商： HSP43891JC-30
11
Extended FIR Filter Length Filter
lengths greater that eight taps can be created by either
cascading together multiple DF devices or “reusing” a single
device. Using multiple devices, an FIR filter of over 1000
taps can be constructed to operate at a 30MHz sample rate.
Using a single device clocked at 30MHz, an FIR filter of over
500 taps can be constructed to operate at less than a
30MHz sample rate. Combinations of these two techniques
are also possible.
Cascade Configuration
To design a filter length L
>
8, L/8 DFs are cascaded by
connecting the COUT0-8 outputs of the (i)th DF to the CIN0-
8 inputs of the (i+1)th DF. The DIN0-8fs inputs and SUM0-25
outputs of all the DFs are also tied together. A specific
example of two cascaded DFs illustrates the technique
(Figure 5). Timing (Figure 6) is similar to the simple 8-tap
FIR, except the ERASE and SENBL/SENBH signals must be
enabled independently for the two DFs in order to clear the
correct accumulators and enable the SUM0-25 output
signals at the proper times.
TABLE 2.
CLK
CELL 0
CELL 1
CELL 2
CELL 3
CELL 4
CELL 5
CELL 6
CELL 7
SUM/CLR
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
C
15
x X
0
+C
14
x X
1
+C
13
x X
2
+C
12
x X
3
+C
11
x X
4
+C
10
x X
5
+C
9
x X
6
+C
8
x X
7
+C
7
x X
8
+C
6
x X
9
+C
5
x X
10
+C
4
x X
11
+C
3
x X
12
+C
2
x X
13
+C
1
x X
14
+C
0
x X
15
0
0
0
0
0
0
0
C
15
x X
8
+C
14
x X
9
+C
13
x X
10
+C
12
x X
11
+C
11
x X
12
+C
10
x X
13
+C
9
x X
14
+C
8
x X
15
+C
7
x X
16
+C
6
x X
17
+C
5
x X
18
+C
4
x X
19
+C
3
x X
20
+C
2
x X
21
+C
1
x X
22
+C
0
x X
23
0
0
0
0
0
C
15
x X
1
C
0
x X
16
0
0
0
0
0
0
0
+C
15
x X
9
C
0
x X
23
0
0
0
0
0
C
15
x X
2
C
0
x X
17
0
0
0
0
0
0
0
+C
15
x X
10
C
0
x X
25
0
0
0
0
0
C
15
x X
3
+C
14
x X
4
+C
13
x X
5
+C
12
x X
6
+C
11
x X
7
+C
10
x X
8
+C
9
x X
9
+C
8
x X
10
+C
7
x X
11
+C
6
x X
12
+C
5
x X
13
+C
4
x X
14
+C
3
x X
15
+C
2
x X
16
+C
1
x X
17
+C
0
x X
18
0
0
0
0
0
0
0
+C
15
x X
11
C
0
x X
26
0
-
-
-
-
C
15
x X
4
C
0
x X
19
0
0
0
0
0
0
0
+C
15
x X
12
C
0
x X
27
-
-
-
-
-
C
15
x X
5
C
0
x X
20
0
0
0
0
0
0
0
+C
15
x X
12
-
-
-
-
-
-
C
15
x X
6
C
0
x X
21
0
0
0
0
0
0
0
+C
15
x X
14
-
-
-
-
-
-
-
C
15
x X
7
+C
14
x X
8
+C
13
x X
9
+C
12
x X
10
+C
11
x X
11
+C
10
x X
12
+C
9
x X
13
+C
8
x X
14
+C
7
x X
15
+C
6
x X
16
+C
5
x X
17
+C
4
x X
18
+C
3
x X
19
+C
2
x X
20
+C
1
x X
21
+C
0
x X
22
0
0
0
0
0
0
0
C
15
x X
15
+C
14
x X
16
+C
13
x X
17
+C
12
x X
18
+C
11
x X
19
+C
10
x X
20
+C
9
x X
21
+C
8
x X
22
+C
7
x X
23
+C
6
x X
24
+C
5
x X
25
+C
4
x X
26
+C
3
x X
27
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Cell 0 (Y
15
)
Cell 1 (Y
16
)
Cell 2 (Y
17
)
Cell 3 (Y
18
)
Cell 4 (Y
19
)
Cell 5 (Y
20
)
Cell 6 (Y
21
)
Cell 7 (Y
22
)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Cell 0 (Y
23
)
Cell 1 (Y
24
)
Cell 2 (Y
25
)
Cell 3 (Y
26
)
Cell 4 (Y
27
)
DATA SEQUENCE INPUT X
30
. . . X
9
, X
8
, X
22
. . . X
1
, X
0
COEFFICIENT SEQUENCE INPUT C
0
. . . C
14
, C
15
, 0 . . . C
0
. . . C
14
, C
15
HSP43891
. . . 0, Y
30
. . . Y
23
, 0. . . 0, Y
22
. . . Y
15
, 0. . . 0
HSP43891
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參數(shù)描述
HSP43891VC-20 制造商:Rochester Electronics LLC 功能描述:- Bulk
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