BU8732AKV Datasheet, PDF (3/11 Pages) Rohm – CODEC IC for digital mobile phone

Communication ICs
BU8732AKV
zBlock diagram
reset
37
XPRSTB
38
DVSS
39
DVDD
40
PCMOUT
DSP
41
PCMIN
42
DCLK
43
CPUSEL
44
RGPULSE
R9
45
RINGER
RINGER1
R10
46
RINGER2
(20Ω)
47
RINGER3
48
PVSS
Power on by
REFPON
Power on by
VCPON
Power on by
TGPON
Power on by
VCPON or TGPON
Power on by
RXPON
for CPU
frame syne
signal
8kHz
TEXT
C11
R8
C10
R7
36
35
34
33
32
31
30
29
28
27
26
25
CPU I / F
PLL
DTMF / TONE
DSP I / F
BPF
A/D
SW8
SW12
Amp1
AAF
SW0
MIC
Amp2
1
2
3
EV3
EV0
MIC
Amp1
+
LPF
PWM
RG0
1
2
3
EXTSEL
RAmp
SW9A
SW9B
D/A
EV1
EV7 EV4
Vref /
COMMON
+
ERMT ^−
+
JAmp
SOFTMUTE
+
Amp3 EV6
SPMT −
+
EV5
EAmp1
Amp5
EV2
Amp4
−
−
+
EAmp2
MIC10
24 _R6
MIC1IN
23
MIC1IP
C9
C8
R5
22
TXVSS
21
TXREF
20
1µ
REFC
19
2.2µ
CODECREF
18
1µ
RXREF
17
1µ
SMUTE
16
RXVDD
0.22µ
15
EARO
14
RXVSS ^C7
13
EAR (32Ω)
1
2
REXT
3
4
5
6
7
8
9
10
11
12
+
+
+
R2
R4
R1
C2
C1
R3
C4
C3
C5
C6
SPC (32Ω)
Power on by
SPCON
Power on by
EARON
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