BU9408KS2_12 Datasheet, PDF (38/57 Pages) Rohm – 32bit Audio DSP with Built-in 4ch DAC and ASRC

BU9408KS2
Technical Note
4-20. Sub output channel mixer
Mixing setting of sound of the left channel and the right channel of the digital signal for sub output which is input into sound
DSP is done. The monaural conversion of the stereo signal is done here.
The data which is input into Lch of Sub output signal processing is mixed.
Default = 0
Select Address
&h22 [ 3:2 ]
Value
0
1
2
3
Operating explanation
Inputting the Lch data
Inputting the data of (Lch + Rch) / 2
Inputting the data of (Lch + Rch) / 2
Inputting the Rch data
The data which is input into Rch of Sub output signal processing is mixed.
Default = 0
Select Address
&h22 [ 1:0 ]
Value
0
1
2
3
Operating explanation
Inputting the Rch data
Inputting the data of （Lch + Rch） / 2
Inputting the data of （Lch + Rch） / 2
Inputting the Lch data
4-21. LPF for sub woofer output
It is the crossover filter (LPF) for sub woofer output.
LPF function ON/OFF.
Default = 0
Select Address
&h7A [ 7 ]
Value
0
1
Operating explanation
LPF function is not used
LPF function is used
Setting of the cut off frequency (Fc) of LPF
Default = 0h
Select Address
&h7A [ 6:4 ]
Command
0
1
2
3
Operating explanation
Fc
60Hz
80Hz
100Hz
120Hz
Command
4
5
6
7
Fc
160Hz
200Hz
240Hz
280Hz
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38/53
2012.03 - Rev.A