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参数资料
| 型号： | TMC2249AH5C |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | DSP Peripheral |
| 英文描述： | 12-BIT, DSP-MIXER, PPGA120 |
| 封装： | PLASTIC, PGA-120 |
| 文件页数： | 3/18页 |
| 文件大小： | 138K |
| 代理商： | TMC2249AH5C |
TMC2249A
PRODUCT SPECIFICATION
REV. 1.0.2 7/6/00
11
Once all of the products of the desired taps have been
summed, the result is available at the output. The user then
"pushes" a new time-data sample on to the appropriate even
or odd data register "stack" and reiterates the summation.
Note that the coefcient bank "pointers", the BDEL and
DDEL delay words, are alternately incremented and decre-
mented on successive lter passes to maintain alignment
between the incoming data samples and their respective
coefcients.
The effective lter speed is calculated by dividing the clock
rate by one-half the number of taps implemented.
Alternatively, non-symmetric FIR lters can be implemented
using the TMC2249A in a similar fashion. Here, a shift reg-
ister is used to delay the incoming data fed to the A input by
an amount equal to one-half the length of the lter (the
length of the A delay register).
As shown in Figure 5, the data is then sent to the C input,
thus "stacking" the A and C delay registers to create a single
N-tap FIR lter. The incremented delay words (ADEL-
DDEL) for all four inputs are identical. Again, the lter
throughput is equal to the clock speed divided by one-half
the number of taps implemented.
Figure 5. Non-Symmetric 32-Tap FIR Filtering Using the
TMC2249A
TMC2011A
16-Stage Shift Register
Filter Output
AB
C
D
x(m+0)
x(m)
h(0)
x(m+16)
h(16)
x(m+15)
h(15)
x(m+31)
S15-0
TMC2249A
h(31)
Table 4. FIR Filtering – Operation Sequence
Notes:
1. If only the 16 MSBs of the result are used, the user may leave RND HIGH and SWAP low. If the 16 LSBs or all 24 bits of the
result are used, then RND should be set low.
2.
Cycle
Push
AB
Push
C
D
ADEL
CDEL
BDEL
DDEL
ACC
ENA
ENB
ENC
END
Convolutional Sum
Resultant
Output
1
–
0
L
H
x(31)
h(0)+x(30)h(1)
See Note 2
2
–
1
H
+x(29)
h(2)+x(28)h(3)
3
–
2
H
+x(27)
h(4)+x(26)h(5)
4
–
3
H
+x(25)
h(6)+x(24)h(7)
5
–
4
H
+x(23)
h(8)+x(22)h(9)
6
–
5
H
+x(21)
h(10)+x(20)h(11)
7
–
6
H
+x(19)
h(12)+x(18)h(13)
8
–
7
H
+x(17)
h(14)+x(16)h(15)
9
–
8
H
+x(15)
h(15)+x(14)h(14)
10
–
9
H
+x(13)
h(13)+x(12)h(12)
11
–
A
H
+x(11)
h(11)+x(10)h(10)
12
–
B
H
+x(9)
h(9)+x(8)h(8)
13
–
C
H
+x(7)
h(7)+x(6)h(6)
14
–
D
H
+x(5)
h(5)+x(4)h(4)
15
–
E
H
+x(3)
h(3)+x(2)h(2)
16
–
x(32)
–
F
H
L
H
+x(1)
h(1)+x(0)h(0)
17
–
0
F
H
+x(31)
h(1)+x(32)h(0)
18
–
1
E
H
+x(29)
h(3)+x(30)h(2)
19
–
2
D
H
+x(27)
h(5)+x(28)h(4)
20
–
3
C
H
+x(25)
h(7)+x(26)h(6)
21
–
4
B
H
+x(23)
h(9)+x(24)h(8)
sx k
()hk
() xk 16
+
()hk
()
+
()
K0
=
15
∑
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TMC2249AH5C1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TMC2249AH5C2 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Digital Mixer 12 x 12 Bit, 60 MHz |
| TMC2249AH6C | 功能描述:视频 IC Digital Mixer RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TMC2249AH6C1 | 功能描述:视频 IC Digital Mixer RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TMC2249AH6C2 | 功能描述:视频 IC RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
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