BU7861KN_08 Datasheet, PDF (6/13 Pages) Rohm – Mixer & Selector with PCM CODEC and 16bit D/A Converter

●Block Diagrams
MICB_1
MICB_2 ^{MIC_BIAS MIC BIAS}
CPU I/F
MICO
MICIN_C
MICIN_1
-
MICIN_2
+
MIC_SEL
MIC_MT 100kΩ
27kΩ
100kΩ
-
+
EXTIN
EXTIN_MT
EXTGND
RX_TEST1
VREF/COMMON
16step
TX_VOL
+6～-8dB
Tx_testline
VDD/VSS
SMUTE
POP
TX_TEST1
A/D BPF
EXTOUT
330kΩ
EXTOUT
EXTOUT_SMT
TX_TEST2
RECN
100kΩ
-
+
100kΩ
100kΩ REC_MT
100kΩ REC_TST
RECP
-
+
REC_SMT
100kΩ
32step
RX_VOL
0～-30dB
SPOUT
32step
SPRX_VOL
SPOUT_SMT ^0～-30dB
60kΩ
-
+
Rx_testline
60kΩ ST_MT
Gain=3.2dB
8step
ST_VOL
-18～-42dB
41.7kΩ VIC_MT
60kΩ MEL_MT
32step
+6～-54dB
MEL_VOL
60kΩ
Gain=3.2dB
41.7kΩ SPVIC_MT
-
+
60kΩ _{SPMEL_MT}
16step
+6～-8dB
SPMEL_VOL
SOUND_MT
HP_LI
HP_L
HP_R
HP_RI
HPR_TST
HPL_TST
200kΩ 100kΩ
100kΩ
Gain=+3dB
70.8kΩ
HSJL_MT
200kΩ
-
+
HP_SMT
+
-
100kΩ
100kΩ
200kΩ 100kΩ
200kΩ
-
HP2_VOL
+
8step ^HPL_MT
+14～0dB
Gain=+3dB
70.8kΩ
HSJR_MT
+
-
100kΩ
HP2_VOL
8step
+14～0dB
HPR_MT
80kΩ
32step
0～-45dB
HP_VOL
80kΩ
50kΩ
-
+
50kΩ
-
+
DSP
I/F
RX_TEST2
D/A
LPF
40kΩ
-
+
PLL
40kΩ
TONE_MT
DTMF/
TONE
16step
0～-28dB
50kΩ AIN_MT
50kΩ
AIN_VOL
25kΩ
25kΩ
DIG_MT
25kΩ
25kΩ
DSPCLK
DSPIN
DSPOUT
PLLLPF
FSYNC
AIN_R
AIN_L
SYSCLK
SDI
LRCLK
BCLK
TEST
CSTEP
Fig.13 BU7861KN Block Diagram
36
RECN 37
RECP 38
CSTEP 39
CPOP 40
SMUTE 41
RXCOM42
TXCOM43
PVCOM 44
COMIN 45
EXTOUT46
MICB_1 47
MICB_2 48
1
35
34
33
32 31
30 29
28
27 26
25
24 DSPIN
23 DSPOUT
22 DSPCLK
21 DVSS
20 DVDD
BU7861KN
19 SYSCLK
18 BCLK
17 SDI
16 LRCLK
15 RSTB
14 TEST
13 DACRO
2
3
4
5
6
7
8
9
10
11
12
Fig.14 BU7861KN Pin Placement Diagram
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