BU26156RFS Datasheet, PDF (63/95 Pages) Rohm – Monoraul MIC Input with ALC

BU26156RFS
Datasheet
Mixer & Volume Control Register
MAPCON
INDEX
b07
b06
b05
b04
b03
b02
b01
b00
R
W
(Initial)
0x0
0x6a 0x6b
DVFCON
RMCON
LMCON
0
0
0
0
0
0
0
0
This register is to control the SAI receive data L channel plus R channel mixer and the digital volume fade control.
LMCON[1:0]
These bits are to control the SAI receive data L channel plus R channel mixer
LMCON
Description
0x0
Use L Discard R
0x1
Use R Discard L
0x2
Use (L+R)
0x3
Use (L+R)/2
RMCON[1:0]
These bits are to control the SAI receive data R channel plus L channel mixer
RMCON
Description
0x0
Use R Discard L
0x1
Use L Discard R
0x2
Use (L+R)
0x3
Use (L+R)/2
DVFCON[3:0]
These bits are to set the volume change step time of the digital volume fade function. The volume changes step by step
(0.5dB) with this setting period. Step time is in proportion to sampling frequency (fs) as following table.
DVFCON
fs equivalent
Time(fs=48kHz)
0x0
1/fs
20.8µs
0x1
2/fs
41.7µs
0x2
4/fs
83.3µs
0x3
8/fs
167µs
0x4
16/fs
333µs
0x5
32/fs
667µs
0x6
64/fs
1.33ms
0x7
128/fs
2.67ms
0x8
256/fs
5.33ms
0x9
512/fs
10.7ms
0xA
1024/fs
21.3ms
0xB
2048/fs
42.7ms
0xC
4096/fs
85.3ms
0xD
8192/fs
171ms
0xE
16384/fs
341ms
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TSZ22111・15・001
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TSZ02201-0V1V0E502570-1-2
Jul.1.2014 Rev.001