BU94601KV_12 Datasheet, PDF (15/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
4. SEL_DOUT
Audio output selection signal
Signal name I/O
Function
Remarks
SEL_DOUT I Audio output selection
H: Line output, L: Digital output(I²S, SPDIF)
This SEL_DOUT selects audio output signal.
Table 1. “Audio output” shows the audio outputs for each MODE.
Also table 2. ”I²S_fs” shows the I²S output formats for each MODE.
For command, see Chapter VII
"TEST terminal" needs to be pull-up to 3.3V power supply.
Table 1. Audio output
Pin No.
44
46
53
54
55
MODE1
MODE2,3
SEL_DOUT=H
SEL_DOUT=L
SEL_DOUT=H
SEL_DOUT=L
I2S
SPDIF　ON
function I/O PU function I/O PU function I/O PU function I/O PU function I/O PU
Line Out Rch O OFF
HiZ
O OFF Line Out Rch O OFF
HiZ
O OFF
HiZ
O OFF
Line Out Lch O OFF
HiZ
O OFF Line Out Lch O OFF
HiZ
O OFF
HiZ
O OFF
LED_ACCESS O OFF I2S LR CLOCK O OFF TEST terminal I ON I2S LR CLOCK O OFF SPDIF
O OFF
LED_RANDOM O OFF I2S BIT CLOCK O OFF TEST terminal I ON I2S BIT CLOCK O OFF TEST terminal I OFF
LED_REPEAT O OFF I2S LRDATA O OFF TEST terminal I ON I2S LRDATA O OFF TEST terminal I OFF
*PU・・・Pull-Up
Table 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.
5. SEL_VOL
Sound volume operation selection signal
Signal name I/O
Function
SEL_VOL I Sound volume operation
Remarks
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 7 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.
0
-10
-20
-30
-40
-50_{↓ -∞}
Initial value: -24.1 dB
(when SEL_VOL=H)
-60
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
Volume step
Figure 7 Volume Step Function
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TSZ22111・15・001
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TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001