BM28723AMUV
14.5 Volume Setting - continued
The Lch/Rch independent volume setting and the dependent volume setting can be selected by 0x10[7] command.
When Lch/Rch independent volume set, the volume setting of Lch is the setting of 0x10[1:0] and 0x11, and the volume
setting of Rch is the settings of 0x10[5:4] and 0x12.
Setting of Lch/Rch independent volume
Default=0x0
Select Address
0x10[7]
Value
0x0
Explanation of Operation
Lch/Rch dependent volume setting
Lch/Rch independent volume setting
0x1
Setting of volume (Setting of Rch volume, It is enable only to set an independent volume. )
Default=0xFF
Select Address
0x12[7:0]
Explanation of Operation
Value
0x00
0x01
Gain
+24dB
+23.5dB
0x30
0x31
0x32
0dB
-0.5dB
-1dB
0xFE
0xFF
-103dB
-∞
Fine volume setting function becomes effective by sending the following command.
When using this command, it is possible to set a volume in 0.125dB step.
Setting of fine volume (Setting of Rch fine volume, It is enable only to set an independent volume. )
It is possible to use with the 0.5dB step in changing only 0x12[7:0] when 0x10[5:4]=0.
Default=0x0
Select Address
0x10[5:4]
Value
0x0
Explanation of Operation
0dB
0x1
0x2
0x3
-0.125dB
-0.25dB
-0.375dB
It is possible to use with the 0.125dB step in setting both 0x10[1:0] and 0x11[7:0].
In case of 0x10[1:0]=0x0, it becomes the set value of 0x11[7:0].
In case of 0x10[1:0]=0x1, it becomes the -0.125dB set value of 0x11[7:0].
In case of 0x10[1:0]=0x2, it becomes the -0.25dB set value of 0x11[7:0].
In case of 0x10[1:0]=0x3, it becomes the -0.375dB set value of 0x11[7:0].
Since the transfer of 0x11 fixes it in any case, the soft transition can be beforehand begun in the set value for the direct
following of the purpose in setting 0x11 after setting in 0x10.
0x10[5:4] is the same function as 0x10[1:0], 0x12 is the same function as 0x11 when Lch/Rch independently set for Rch.
0x11
0x10→0x11
0x11
0x10→0x11
Volume
Volume
When use 0.5dB steps
When use 0.125dB steps
Figure 56
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31.Aug.2018 Rev.001
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