BU7831KN_10 Datasheet, PDF (5/17 Pages) Rohm – Voice/Audio Mixer & Selector IC

BU7831KN
●Block Diagram, Recommended application circuit, Pin assign
2.5 ～ 3.3V
+
VDD
VSS
Other
Source
PCM
CODEC
Stereo
Tuner
Stereo
Melody
ST1L
ST1R
ST2L
ST2R
ST3L
ST3R
ATT1L
0～ ‐28dB
2dBstep
ATT1R
0～ ‐28dB
2dBstep
ATT2L
0/ ‐6dB
ATT2R
0/ ‐6dB
ATT3L
0/ ‐6dB
MIXSEL
1
ATT4L
0～‐28dB
2dBstep
MIXSEL2
ATT4R
0～ ‐28dB
2dBstep
MIXSEL3 ATT5
0～ ‐28dB
2dBst ep
MIXSEL4
ATT6L
0～‐28dB
2dBstep
ATT3R
0/ ‐6dB
BIAS
MIXSEL5
Serial Control
ATT6R
0～‐28dB
2dBstep
Technical Note
－
＋
SPL
Stereo
Speaker
－
Amp
＋
SPR
－
＋ _{600Ω EXTO}
External
16Ω
＋
100 µF
+
－
HPL
StereoHeadPhone
＋ ^16Ω
－
100 µF
+
HPR
CVCOM
NRST SCLK SDATA NCS
+
4.7 µF
CSTEP
1 µF
CSTART
1 µF
RESET
CPU I/F
CPU
Fig.19 Application circuit example
VDD
15
VSS
14
HPR CSTEP CVCOM
13
12
11
HPL ₁₆
10 ST3L
CSTART ₁₇
EXTO 18
BU7831KN
9 _ST3R
8 _ST2L
SPR 19
7 ST2R
SPL ₂₀
6 _ST1L
1
SCLK
2
3
SDATA NCS
4
NRST
5
ST1R
Fig.20 Pin Assign
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5/16
2010.09 - Rev.A