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參數資料
型號： TLV320AIC3120IRHBR
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： AUDIO AMPLIFIER, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數： 77/150頁
文件大小： 1507K
代理商： TLV320AIC3120IRHBR
M
n
n 0
H(z)
FIR z
M
24 for PRB _ R6, PRB _ R18
M
19 for PRB _ R12
-
=
SLAS653 – FEBRUARY 2010
www.ti.com
Table 5-13. ADC Biquad Filter Coefficients (continued)
Filter
Filter Coefficient
Filter Coefficient RAM Location
Default (Reset) Values
Biquad C
N0
Page 4 / register 34 and page 4 / register 35
0x7FFF (decimal 1.0 – LSB value)
N1
Page 4 / register 36 and page 4 / register 37
0x0000
N2
Page 4 / register 38 and page 4 / register 39
0x0000
D1
Page 4 / register 40 and page 4 / register 41
0x0000
D2
Page 4 / register 42 and page 4 / register 43
0x0000
Biquad D
N0
Page 4 / register 44 and page 4 / register 45
0x7FFF (decimal 1.0 – LSB value)
N1
Page 4 / register 46 and page 4 / register 47
0x0000
N2
Page 4 / register 48 and page 4 / register 49
0x0000
D1
Page 4 / register 50 and page 4 / register 51
0x0000
D2
Page 4 / register 52 and page 4 / register 53
0x0000
Biquad E
N0
Page 4 / register 54 and page 4 / register 55
0x7FFF (decimal 1.0 – LSB value)
N1
Page 4 / register 56 and page 4 / register 57
0x0000
N2
Page 4 / register 58 and page 4 / register 59
0x0000
D1
Page 4 / register 60 and page 4 / register 61
0x0000
D2
Page 4 / register 62 and page 4 / register 63
0x0000
5.5.4.3.3 FIR Section
Three of the available ADC processing blocks offer FIR filters for signal processing. Processing block
PRB_R12 features a 20-tap FIR filter, whereas the processing blocks PRB_R6 and PRB_R18 each
feature a 25-tap FIR filter.
(3)
The coefficients of the FIR filters are 16-bit 2s-complement format (2 bytes each) and correspond to the
ADC coefficient space as listed in Table 5-14. Note that the default (reset) coefficients are not vaild for the
FIR filter. When the FIR filter is used, all applicable coefficients must be reprogrammed by the user. To
reprogram the FIR filter coefficients as an all-pass filter, write value 0x00 to page 4 / register 24, page 4 /
register 25, page 4 / register 34, page 4 / register 35, page 4 / register 44, page 4 / register 45, page 4 /
register 54, and page 4 / register 55.
Table 5-14. ADC FIR Filter Coefficients
Filter Coefficient
FIlter Coefficient RAM Location
Default (Reset) Values(1)
Fir0
Page 4 / register 14 and page 4 / register 15
0x7FFF (decimal 1.0 – LSB value)
Fir1
Page 4 / register 16 and page 4 / register 17
0x0000
Fir2
Page 4 / register 18 and page 4 / register 19
0x0000
Fir3
Page 4 / register 20 and page 4 / register 21
0x0000
Fir4
Page 4 / register 22 and page 4 / register 23
0x0000
Fir5
Page 4 / register 24 and page 4 / register 25
0x7FFF (decimal 1.0 – LSB value)
Fir6
Page 4 / register 26 and page 4 / register 27
0x0000
Fir7
Page 4 / register 28 and page 4 / register 29
0x0000
Fir8
Page 4 / register 30 and page 4 / register 31
0x0000
Fir9
Page 4 / register 32 and page 4 / register 33
0x0000
Fir10
Page 4 / register 34 and page 4 / register 35
0x7FFF (decimal 1.0 – LSB value)
Fir11
Page 4 / register 36 and page 4 / register 37
0x0000
(1)
Not valid for the FIR filter – must be reprogrammed by user
32
APPLICATION INFORMATION
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TLV320AIC3120
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