BU9414FV Datasheet, PDF (42/61 Pages) Rohm – 32bit Audio DSP

BU9414FV
Technical Note
4-20. Sub output EVR (electronic volume)
The volume for sub output can select with 0.5dB step from +24dB to -103dB.
When changing volume, smooth transition is done. Smooth transition duration is required approximately 22ms when it is
from 0dB. (Fixed)
Volume setting
Default = FFh
Select Address
&h2C [ 7：0 ]
Operating explanation
Command
00
01
Gain
+24dB
+23.5dB
30
0dB
31
-0.5dB
32
-1dB
FE
-103dB
FF
-∞
4-21. Sub output balance
As for sub output balance, it is possible to be attenuated at 1dB step width from volume setting value. When changing,
smooth transition is done.
When changing balance, smooth transition is done. Smooth transition duration is required approximately 22ms. (Fixed)
L/R Balance setting
Default = 80h
Select Address
&h2D [ 7：0 ]
Operating explanation
Command
00
01
Lch
Rch
0dB
-∞
0dB -126dB
7E
0dB -1dB
7F
0dB 0dB
80
0dB 0dB
81
-1dB 0dB
FE
-126dB 0dB
FF
-∞
0dB
4-22. Sub output post scaler
The occasion when the data which is calculated with DSP of 32bit width is output at 24bit width, level adjustment is done.
The adjustment range can be set with 0.5dB step from +24dB to -103dB.
There is no smooth transition function in the sub output post scaler.
Default = 30h
Select Address
&h2E [ 7：0 ]
Operating explanation
Command
00
01
Gain
+24dB
+23.5dB
30
0dB
31
-0.5dB
32
-1dB
FE
-103dB
FF
-∞
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2012.03 - Rev.A