BU26154MUV_15 Datasheet, PDF (61/90 Pages) Rohm – Monaural Audio CODEC with Touch Panel Interface

BU26154MUV
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 controls L/R mixer processing at the time of the SAI reception and a fading function of the digital Volume.
LMCON[1:0]
This bit sets the input channel of SAI reception data of the DAC (Lch).
Setting
Explanation
0x0
I use L
0x1
I use R
0x2
I use (L+R)
0x3
I use (L+R)/2
RMCON[1:0]
This bit sets it about SAI reception data which channel you input into DAC (Rch).
Setting
Explanation
0x0
I use R
0x1
I use L
0x2
I use (L+R)
0x3
I 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.
Setting
fs conversion
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
Record Digital Attenuator Control Register
MAPCON
INDEX
b07
b06
b05
b04
b03
b02
b01
b00
R
W
(Initial)
0x0
0x6c 0x6d
RDVOL
1
1
1
1
1
1
1
1
This register sets digital Volume Gain of the recording course.
MUTE could be set from -71.5dB to 0.0dB by 0.5dB step.
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TSZ02201-0V2V0E500110-1-2
26.Oct.2015 Rev.002