BU26154MUV Datasheet, PDF (23/89 Pages) Rohm – High PSRR is attained by built-in regulator

BU26154MUV
Datasheet
State transition about sound control
The following shows state transition about sound control. A change state is carried out by RECPLAY bit setup.
Sound Stop
STATE
0x0
Rec STATE
0x1
Play STATE
0x2
Monitor STATE
0x7
Rec and Play
STATE
0x3
BU26154MUV is changed
status by setting RECPLAY
bit.
Figure 26
(1) Sound Stop STATE (RECPLAY=0x0)
Sound activity is stopped.
(2) Rec STATE (RECPLAY =0x1)
Recording is enabled through microphone.
(3) Play STATE (RECPLAY =0x2)
Playback is enabled from SAI.
(4) Monitor STATE (RECPLAY =0x7)
Monitoring recording via microphone is enabled. ALC function is only effective in recording path.
Only 2ch sound effects are available in Notch filter mode. In the time of transition Rec STATE to Monitor STATE, please
set off the register bits of EQ2EN-EQ3EN.
(5) Rec and Play STATE (RECPLAY =0x3)
Playback is enabled from SAI with recording via microphone. ALC function is only effective in recording path.
Only 2ch sound effects are available in Notch filter mode. In the time of transition Rec STATE to Monitor STATE, please
set off the register bits of EQ2EN-EQ3EN.
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TSZ02201-0V1V0R501570-1-2
23.Jun.2014 Rev.001