7.26PSVCVolumeBiquadRegister(0xCF)
TAS5518C
8-ChannelDigitalAudioPWMProcessor
SLES238A–SEPTEMBER2008–REVISEDJULY2009
www.ti.com
Table7-29.OutputMixerRegisterFormat(Lower4Bytes)(continued)
D31D30D29D28D27D26D25D24FUNCTION
0100Selectchannel5tooutputmixer
0101Selectchannel6tooutputmixer
0110Selectchannel7tooutputmixer
0111Selectchannel8tooutputmixer
G27G26G25G24Selectedchannelgain(upper4bits)
D23D22D21D20D19D18D17D16FUNCTION
G23G22G21G20G19G18G17G16Selectedchannelgain(continued)
D15D14D13D12D11D10D9D8FUNCTION
G15G14G13G12G11G10G9G8Selectedchannelgain(continued)
D7D6D5D4D3D2D1D0FUNCTION
G7G6G5G4G3G2G1G0Selectedchannelgain(lower8bits)
Eachgaincoefficientisin28-bit(5.23)format,so0x800000isagainof1.Eachgaincoefficientiswritten
asa32-bitwordwiththeupperfourbitsnotused.Notethatthisregistershouldbeusedonlywiththe
PSVCfeatureitsuseisnotrequired.Forsystemsnotusingthisfeature,itisrecommendedthatthis
biquadbesettoall-pass(default).
Table7-30.VolumeBiquadRegisterFormat(Default=All-Pass)
DEFAULTGAINCOEFFICIENTVALUES
DESCRIPTIONREGISTERFIELDCONTENTS
DECIMALHEX
b
o
coefficientu[31:28],b0[27:24],b0[23:16],b0[15:8],b0[7:0]1.00x00,0x80,0x00,0x00
b
1
coefficientu[31:28],b1[27:24],b1[23:16],b1[15:8],b1[7:0]0.00x00,0x00,0x00,0x00
b
2
coefficientu[31:28],b2[27:24],b2[23:16],b2[15:8],b2[7:0]0.00x00,0x00,0x00,0x00
a
1
coefficientu[31:28],a1[27:24],a1[23:16],a1[15:8],a1[7:0]0.00x00,0x00,0x00,0x00
a
2
coefficientu[31:28],a2[27:24],a2[23:16],a2[15:8],a2[7:0]0.00x00,0x00,0x00,0x00
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