BM28723AMUV
14 Digital Sound Processing (DSP) - continued
The management of audio data and coefficient data is as follows by each block.
Decimal point
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
Extension bit Data[22:0]
Decimal point
9
1
8
0
7
6
5
4
3
2
1
0
S
Audio data
Data of DSP part
23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
S
EXT. bit
Coefficient data[20:0] for BQ etc.
Coefficient data of DSP part
Coefficient data
Figure 53
14.1 Bypass
There are commands to bypass selected DSP functions. This bypass can be set even the setting values are remained for
each function; therefore, it is easy to check ON/OFF of the sound effect.
There are three bypass options, which are 12Band BQ, 3Band DRC or the whole DSP except Hard Clipper.
I2S
LJ
RJ
Fine
Master
Volum
e/ch
Fine
post
scaler/
ch
12Ban
d
/ch BQ
Pre
Scaler
Chanel
Mixer
Post
Scaler
DC cut
HPF
3Band
DRC SW2
Hard
Clipper
Input1
Main
SW3
SW1
Figure 54
Default=0x0
Select Address
0x02[2:0]
bit
2
Explanation of Operation
Bypass of 12 Band BQ (SW1) 0: Normal 1: Bypass
Bypass of 3 Band DRC (SW2) 0: Normal 1: Bypass
1
Bypass of DSP (SW3)
(Except Hard Clipper)
0: Normal 1: Bypass
0
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