BU26154MUV_15 Datasheet, PDF (28/90 Pages) Rohm – Monaural Audio CODEC with Touch Panel Interface

BU26154MUV
Datasheet
Low Power Consumption Operation
When PCM data is inputted into LSI consecutive "0" is detected, it will disable the output amplifier automatically and
perform low power consumption mode operation by stopping the internal clock. When data except “0” are inputted, it will
automatically return to original movement.
When "0" is detected in both LCHRCH, this function is effective. When you use only LCH, please input "0" data into the
RCH side. When you use only RCH, please input "0" data into the LCH side. This function is effective only at the time of the
playback of the speaker amplifier. At the time of headphones amplifier playback and the recording, please set it to disable.
In addition, set the enable function and "0" count level in Zero Detection Setting Register.
Normal operation
Low power operation
Normal
operation
Figure 32
Change of the SP/HP playback
When it changes of Speaker Amplifier and Headphone Amplifier, it prepares for COEFSEL bit because it does not perform
the re-setting of filter coefficients. A side register is used when COEFSEL bit is "0". B side register is used when COEFSEL
bit is "1". The target registers are as follows. Please be careful in setting addresses.
A side register
MAP
INDEX(R)
2 0x24/0x26/0x28
0
0x46
0
0x4c/0x4e
0
0x5c
0
0x66
0
0x70
0
0x3e
0
0x74 to 0x7c
0
0x80 to 0xa6
MAP
2
2
2
2
2
2
2
2
2
B side register
INDEX(R)
0x2a/0x2c/0x2e
0x46
0x4c/0x4e
0x5c
0x66
0x70
0x73
0x74 to 0x7c
0x7e to 0xa4
Register
-
P²BASS+ Parameter0/1/2
Play HPF2 Setting
Play Programmable HPF2L/H Coef
Sound Effect Mode
DSP Filter Function Enable
Playback Effect Volume Control
Playback Digital Attenuator Control
EQ Band0/1/2/3/4 Gain Setting
Programmable Equalizer Band0/1/2/3/4
Coefficient-a0/a1 L/H
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26.Oct.2015 Rev.002