參數(shù)資料
型號： HSP45116-DB
廠商： Intersil Corporation
英文描述： HSP45116 Daughter Board
中文描述： HSP45116子板
文件頁數(shù)： 13/18頁
文件大小： 129K
代理商： HSP45116-DB
13
The Growth Detect circuitry outputs a two bit value that
signifies the amount of growth on the data in the CMAC and
Complex Accumulator. Its output, DET0-1, is encoded as
shown in Table 5. If PEAK is low, the highest value of
DET0-1 is latched in the Growth Detect Output Register.
The relative weighting of the bits at the inputs and outputs of
the CMAC is shown in Figure 3. Note that the binary point of
the sine, cosine, RIN and IIN is to the right of the most
significant bit, while the binary point of RO and IO is to the
right of the fifth most significant bit. These CMAC external
input and output busses are aligned with each other to
facilitate cascading NCOMs for FFT applications.
FIGURE 3. BIT WEIGHTING
TABLE 5. GROWTH ENCODING
DET 1
DET 0
NUMBER OF BITS
OF GROWTH ABOVE 2
o
0
0
0
0
1
1
1
0
2
1
1
3
SIN/COS INPUT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-2
0
.
2
-1
↑
Radix Point
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
2
-9
2
-10
2
-11
2
-12
2
-13
2
-14
2
-15
COMPLEX MULTIPLIER/ACCUMULATOR INPUT (RIN, IIN)
SH = 00
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-2
0
.
2
-1
↑
Radix Point
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
2
-9
2
-10
2
-11
2
-12
2
-13
2
-14
2
-15
COMPLEX MULTIPLIER/ACCUMULATOR OUTPUT (RO, IO)
OUTMUX = 00
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-2
4
2
3
2
2
2
1
-2
0
. 2
-1
↑
Radix Point
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
2
-9
2
-10
2
-11
2
-12
2
-13
2
-14
2
-15
COMPLEX MULTIPLIER/ACCUMULATOR OUTPUT (RO, IO)
OUTMUX = 01
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-2
4
2
3
2
2
2
1
2
-16
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
2
-24
2
-25
2
-26
2
-27
2
-28
2
-29
2
-30
0
COMPLEX ACCUMULATOR OUTPUT (RO, IO)
OUTMUX = 10
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-2
4
2
3
2
2
2
1
-2
0
.
2
-1
↑
Radix Point
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
2
-9
2
-10
2
-11
2
-12
2
-13
2
-14
2
-15
HSP45116
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