BU26154MUV_15 Datasheet, PDF (60/90 Pages) Rohm – Monaural Audio CODEC with Touch Panel Interface

BU26154MUV
Datasheet
HPF2OD/HPFODB
This bit is to set number of high pass filter order (HPF2EN bit) for noise cut. In recording or playback operation(0x13/0x14:
RECPLAY≠0）,do not change this bit. If this bit is changed, the noise may be generated.
HPF2OD/
HPF2ODB
Explanation
0
The second filter
1
Primary filter
Digital Volume Control Function Enable Register
MAPCON
INDEX
b07
b06
R
W
(Initial)
0x0
0x68 0x69
-
-
-
-
b05
b04
b03
b02
b01
b00
-
DVMUTE DVFADE
-
RALCEN PALCEN
-
0
0
-
0
0
This register sets ON/OFF of digital, the Volume control function.
PALCEN
This bit is to set ON or OFF of the playing ALC.
It must not be wrote during recording and playback operation (0x13/0x14: RECPLAY=0x1, 0x3, or 0x7).
If this bit was set as the operation, this IC cannot guarantee correct operating.
PALCEN
Explanation
0
Reproduction ALC OFF
1
Reproduction ALCON
RALCEN
This bit is to set ON or OFF of the recording ALC.
It must not be wrote during recording and playback operation (0x13/0x14: RECPLAY=0x2).
If this bit was set as the operation, this IC cannot guarantee correct operating.
RALCEN
Explanation
0
Recording ALC OFF
1
Recording ALC ON
DVFADE
This bit is to set ON or OFF of the digital volume fade function.
The fade function is effective for recording/playback digital volume and equalizer gain.
DVFADE
Explanation
Fading Function OFF:
0
The register setting value of RDATT, PDATT and EQGAIN0 to 3
is used actual volume value as it is. Therefore the value is
effective immediate.
Fading Function ON:
1
The volume is changing to the register setting value of RDATT,
PDATT and EQGAIN0 to 3 with 1 step per DVFCON register step
time.
DVMUTE
This bit is to set MUTE of the digital volume. This mute function is effective for the recording digital volume at recording and
effective for playback digital volume at playback. The fade function by DVFADE is effective against the volume change by
this bit.
DVMUTE
Explanation
0
Register value of RDVOL and PDATT is effective.
Digital volume is set to MUTE.
1
Register value of RDVOL and PDATT cannot be changed by this
bit, the volume is resumed by releasing this bit (DVMUTE=0) to
the original setting value of RDVOL and PDVOL.
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26.Oct.2015 Rev.002