Schematics
UM1460
50/67
DocID022136 Rev 5
Fig
u
re 2
2
.
Audio
1
1
2
2
3
3
4
4
D
D
C
C
B
B
A
A
STMicroelectronics
Title:
Number:
Rev:
Sheet
of
C.3(PCB.SCH)
Date:
7/20/2016
M
B786
6
2
0
STM32
20-21-45-46
G-EVAL
Audio
I2S_WS
I2S_SD
I2S_SCK
R134
10K
Audio_SCL
Audio_SDA
R110
51
1
2
U19
K
SS-1508
or
KSSG1708
Audio_RST
I2S_MCK
+5V
I2
C
address
0x94
C87
1uF
(X7R)
C95
1uF
C103
0.1uF
SDA
1
SCL
2
A0
3
SPK
4
VP
5
S
P
K
R_OUTA-
6
SPK
7
VP
8
S
P
K
R_OUTB-
9
-VHPF
IL
T
10
FLY
N
11
FLY
P
12
+VHP
13
H
P
/L
INE_OUTB
14
HP
/L
INE_OUTA
15
VA
16
AGND
17
FI
LT
+
18
VQ
19
TSTO
20
A
IN4A
21
A
IN4B
22
A
IN3A
23
A
IN3B
24
A
IN2A
25
A
IN2B
26
AFI
L
T
A
27
AFI
L
T
B
28
A
IN1A
29
A
IN1B
30
SPK
R/HP
31
RESET
32
VL
33
VD
34
DGND
35
TSTO
36
MCLK
37
SCLK
38
SDIN
39
L
RCK
40
GND/Thermal
Pad
0
U23
CS43L22
C88
1
u
F
(X7R)
C98
0.1uF
C92
0.1uF
+2V5
C104
0.1uF
+3V3
C102
1
u
F
(X5R)
C101
1
u
F
(X5R)
C107
150pF(COG)
C108
150pF(COG)
C94
0.1uF
C86
0.022uF
R112
51
C97
0.022uF
C93
0.1uF
F
rom
IO
expandor
Audio_DAC_OUT
R122
100
R113
100K
C105
1
u
F
(X7R)
R115
0
PB
9
PB
6
PC
6
PI
0
PI
1
PI
3
PA
4
Audio_IN
BYP
2
GND
4
IN
-
5
IN
+
8
GS
9
BIA
S
10
C1
14
C2
15
OUT-
16
OUT+
17
VCC
20
STBY
21
GND
22
U33
TS472IQ
T
1
2
U34
K
ECG2740TBL[N/A]
C143
100nF
R198
0
C141
1uF
R197
1K
C144
100nF
C142
1uF
+3V3
C140
1uF
C145
100pF
C146
100pF
C147
0ohm
R199
100K
R196
0
PF
1
0
R200
47
+3V3
R195
10K
JP3
3
2
6
4
3
CN11
P
J3028B-3
R216
0
R215
0
R217
[N/A]
R218
[N/A]
Fit
fo
r
Iphone
headset
Fit
fo
r
Nokia
headset
VD
1
GND
2
C
L
K
_OUT
3
AUX_OUT
4
TST_IN
5
XTO
6
XTI/REF_CLK
7
AD0/CS
8
SCL/CCLK
9
SDA/CDIN
10
U36
CS2200-C
P
MCO
+3V3
C158
0.1uF
PA
8
I2S_CKI
N
C159
1uF
PC
9
R209
0
C155
[N/A]
C154
[N/A]
X6
[N/A]
R211
0
R221
10K
+3V3
0ohm
resistor
mounted
for
DC
coupling
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