BU9414FV Datasheet, PDF (41/61 Pages) Rohm – 32bit Audio DSP

BU9414FV
Technical Note
4-18. Main output clipper
When measuring the rated output (practical maximum output), it is measured where the total distortion rate （THD+N） is
10%. Clipping with any output amplitude is possible by using of clipper function, for example, the rated output of 10W or 5W
can be obtained by using an amplifier with 15W output.
Clip Level
Please set the &h27[7] at “H” when
Default = 0
Select Address
&h29 [ 7 ]
using of clipper function.
Value
0
1
Operational explanation
Not using clipper function
Using clipper function
Clip level is set in the form of higher-order 8 bit&h2A[7:0] and lower-order 8 bit&h2B[7:0].
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Maximum value
100000000000000000000000
Minimum value
0
clip_level[15:0]
1
~clip_level[15:0]
0 0 0 0 0 0 0 A positive clip level
The
1 1 1 1 1 1 1 A negative clip level
clip
leve
l becomes narrow if the setting value is reduced.
Negative clip level is set in such a way that it is the inversion data of positive clip level.
4-19. Selection of sub input data
Selection of Sub input (Sub woofer processing etc.).
The Sub woofer output interlocked with P²Bass’s gain setting is possible by inputting the data that after P²Bass processing.
In addition, in BU9414FV, the data can be inputted from SP conversion2.
Default = 0
Select Address
&h2F [ 1:0 ]
Value
0
1
2
Operational explanation
Inputting of data that are after scaler 1
Inputting of data that are after P²Bass processing
Inputting of data from SP conversion2
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2012.03 - Rev.A