PRB_R12
and
PRB_R9
for
,
19
M
PRB_R18
and
PRB_R15
PRB_R6,
PRB_R3,
for
,
24
M
z
Fir
)
z
(
H
M
0
n
n
n
=
=
=
å
=
-
Digital Microphone Input/Decimation Filter
2.3.3.1.2.3 FIR Section
Six of the available processing blocks offer FIR filters for signal processing. PRB_R9 and PRB_R12
feature a 20-tap FIR filter while the processing blocks PRB_R3, PRB_R6, PRB_R15 and PRB_R18
feature a 25-tap FIR filter
(4)
The coefficients of the FIR filters are 24-bit 2’s complement format and correspond to the coefficient space
as listed below. There is no default transfer function for the FIR filter. When the FIR filter gets used all
applicable coefficients must be programmed.
Table 2-8. FIR Filter Coefficients
Filter
FIlter Coefficient Left Channel
Filter Coefficient Right Channel
Fir0
C7 (Pg 8, Reg 36,37,38)
C39 (Pg 9, Reg 44,45,46)
Fir1
C8 (Pg 8, Reg 40,41,42)
C40 (Pg 9, Reg 48,49,50)
Fir2
C9 (Pg 8, Reg 44,45,46)
C41 (Pg 9, Reg 52,53,54)
Fir3
C10 (Pg 8, Reg 48,49,50)
C42 (Pg 9, Reg 56,57,58)
Fir4
C11 (Pg 8, Reg 52,53,54)
C43 (Pg 9, Reg 60,61,62)
Fir5
C12 (Pg 8, Reg 56,57,58)
C44 (Pg 9, Reg 64,65,66)
Fir6
C13 (Pg 8, Reg 60,61,62)
C45 (Pg 9, Reg 68,69,70)
Fir7
C14 (Pg 8, Reg 64,65,66)
C46 (Pg 9, Reg 72,73,74)
Fir8
C15 (Pg 8, Reg 68,69,70)
C47 (Pg 9, Reg 76,77,78)
Fir9
C16 (Pg 8, Reg 72,73,74)
C48 (Pg 9, Reg 80,81,82)
Fir10
C17 (Pg 8, Reg 76,77,78)
C49 (Pg 9, Reg 84,85,86)
Fir11
C18 (Pg 8, Reg 80,81,82)
C50 (Pg 9, Reg 88,89,90)
Fir12
C19 (Pg 8, Reg 84,85,86)
C51 (Pg 9, Reg 92,93,94)
Fir13
C20 (Pg 8, Reg 88,89,90)
C52 (Pg 9, Reg 96,97,98)
Fir14
C21 (Pg 8, Reg 92,93,94)
C53 (Pg 9, Reg 100,101,102)
Fir15
C22 (Pg 8, Reg 96,97,98)
C54 (Pg 9, Reg 104,105,106)
Fir16
C23 (Pg 8, Reg 100,101,102)
C55 (Pg 9, Reg 108,109,110)
Fir17
C24 (Pg 8, Reg 104,105,106)
C56 (Pg 9, Reg 112,113,114)
Fir18
C25 (Pg 8, Reg 108,109,110)
C57 (Pg 9, Reg 116,117,118)
Fir19
C26 (Pg 8, Reg 112,113,114)
C58 (Pg 9, Reg 120,121,122)
Fir20
C27 (Pg 8, Reg 116,117,118)
C59 (Pg 9, Reg 124,125,126)
Fir21
C28 (Pg 8, Reg 120,121,122)
C60 (Pg 10, Reg 8,9,10)
Fir22
C29 (Pg 8, Reg 124,125,126)
C61 (Pg 10, Reg 12,13,14)
Fir23
C30 (Pg 9, Reg 8,9,10)
C62 (Pg 10, Reg 16,17,18)
Fir24
C31 (Pg 9, Reg 12,13,14)
C63 (Pg 10, Reg 20,21,22)
29
SLAU434 – May 2012
TLV320DAC3203 Application
Copyright © 2012, Texas Instruments Incorporated