BU94603KV Functional Specifications
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Target Spec 0.12
V.4 SEL_DOUT
Audio output selection signal
Signal name I/O
Function
Remarks
SEL_DOUT
I Audio output selection
H: Line output, L: I2S 3 lines serial output/SPDIF
This SEL_DOUT selects audio output signal.
Table V4.1
“Audio output” shows the audio outputs for each MODE.
Also table V4.2
”I2S_fs” shows the I2S output formats for each MODE.
For command, see Chapter VI.
"TEST terminal" describes that this terminal is pulled-up in device.
TableV.4.1 Audio output
Pin No.
MODE1
MODE2,3
SEL_DOUT=H SEL_DOUT=L SEL_DOUT=H
SEL_DOUT=L
SPDIF
OFF
SPDIF
ON
44
Line Out Rch
HiZ
Line Out Rch
HiZ
HiZ
46
Line Out Lch
HiZ
Line Out Lch
HiZ
HiZ
53
LED_ACCESS I2S LR CLOCK TEST terminal
I2S LR CLOCK
SPDIF
54
LED_RANDOM I2S BIT CLOCK TEST terminal I2S BIT CLOCK
TEST
terminal
55
LED_REPEAT
I2S LRDATA
TEST terminal
I2S LRDATA
TEST
terminal
Table V.4.2 I2S_fs
MODE1
32fs
MODE2/3
Can select 32fs, 48fs, 64fs by command.
SEL_DOUT is set only at power ON. Note that change of selection after power ON is ignored.
V.5 SEL_VOL
Sound volume operation selection signal
Signal name I/O
Function
Remarks
SEL_VOL
I Sound volume operation
H: Sound volume operation enabled, L: Sound volume
operation disabled
SEL_VOL selects whether sound volume operation is to be enabled or disabled.
Sound volume operation is enabled when SEL_VOL=H.
Initial value of audio output is -24.1dB at power ON.
Sound volume operation is disabled when SEL_VOL=L. Audio output is fixed to 0dB.
Figure V.5 shows the relationship between audio output and sound volume step.
SEL_VOL is set only at power ON. Note that change of selection after power ON is ignored.
Figure V.5 Volume Step Function
-60
-50
-40
-30
-20
-10
0
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
Volume step
Initial value: -24.1 dB
(when SEL_VOL=H)
-
Au
d
io
o
u
tp
u
t
(d
B)
