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Figure 8-3: Audio module connection schematics
2
3
4
5
6
7
11
12
13
14
5
24
23
22
21
18
17
16
15
8
1
19
9
10
7
6
20
8
9
0
1
2
3
4
5
6
37
38
39
40
41
42
43
44
45
46
47
48
58
57
56
55
54
53
52
72
69
68
67
66
65
64
63
8
7
9
0
62
61
60
59
71
51
70
6
75
74
73
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
MP3-CS#
C20
22pF
C19
22pF
C11
100nF
R1 1M
R20
10K
R21 10K
M
P3
-D
R
EQ
MP3-RST#
C10
100nF
C4
100nF
C12
100nF
C9
100nF
R2
10K
R19
10K
C23
100nF
VCC-3.3
C24
100nF
VCC-3.3
C26
100nF
VCC-3.3
VCC-3.3
C27
100nF
X2
12.288MHz
C13
1uF
VCC-3.3
G
PI
O
VCC-3.3
LEFT
RIGHT
GBUF
VCC-1.8
VCC-1.8
VCC-1.8
VCC-1.8 VCC-3.3
E1
10uF
E2
10uF
CN2
PHONEJACK
LEFT
RIGHT
C16
10nF
C14
47nF
C15
10nF
R27
10
R30
20
R31
20
R28
10
R29
10
R32
470
C17
3.3nF
R17
100K
R33
470
C18
3.3nF
R18
100K
L
R
R22
27
2
2
2
2
2
3
3
3
3
3
3
3
M
C
P/
LN
1
M
IC
N
XR
ES
ET
D
G
N
D
0
C
VD
D
0
IO
VD
D
0
C
VD
D
1
D
R
EQ
G
PI
O
2
G
PI
O
3
G
PI
O
6
G
PI
O
7
XDCS/BSYNC
IOVDD1
VC0
DGND1
XTAL0
XTAL1
IOVDD2
DGND2
DGND3
DGND4
XCS
CVDD2
G
PI
O
5
R
X
TX
SC
LK
SI
SO
C
VD
D
3
XT
ES
T
G
PI
O
0
G
PI
O
1
G
N
D
G
PI
O
4
AGND0
AVDD0
AVDD2
AGND1
AGND2
AGND3
LN2
LEFT
RCAP
AVDD1
GBUF
RIGHT
VS1053
U2
VCC-1.8
VCC-3.3
MP3-CS#
M
P3
-R
ST
#
VCC-3.3
AVCC
MP3-DCS
MP3-DCS
MP3-RST#
MP3-DREQ
MP3-CS#
M
IS
O
3-
PC
11
SC
K
3-
PC
10
M
O
SI
3-
PC
12
30
29
28
27
34
33
46
36
35
42
43
44
45
37
50
9
48
49
11
12
32
4
3
7
7
24
23
18
17
16
15
14
13
5
6
7
8
10
7
8
1
2
22
21
20
19
38
39
40
41
47
31
26
25
7
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
10
PE
11
PE
10
PE6
VBAT
PC13/TAMPER_RTC
PC14/OSC32_IN
PA10
PA9
PA8
PD9
PE
13
PE
12
PB13
PB14
PB15
PD8
PE
14
PE
15
PB
5
PB
4
PB
3
PB
7
PD
7
PD
6
PE5
PE4
PE
1
PE
0
PB
9
PB
8
BO
O
T0
PB
6
OSC_IN
PA0-WKUP
VDDA
VREF+
GNDA
VDD
PC3
PA12
PA11
PB12
PC8
NRST
VDD
GND
PE
7
PD
R
_O
N
(R
FU
)
VD
D
PE2
PE3
PA2
PA1
VC
A
P
VD
D
PC9
PD13
PB
10
PB
11
PD10
PE
8
PB
2
PD11
PD14
PD
5
PC2
PC1
PC0
PB
1
PE
9
PD12
PC7
OSC_OUT
PC15/OSC32_OUT
PD15
PC6
PA13
PC
10
PA
14
VCAP
GND
VDD
PA
15
PC
11
PC
12
PD
0
PA
6
PA
5
PC
4
PA
7
PC
5
PB
0
G
N
D
VD
D
PA
3
PA
4
PD
1
PD
2
PD
3
PD
4
U1
M
IS
O
3-
PC
11
R4
27
R5
27
SC
K3
-P
C
10
M
O
SI
3-
PC
12
VREF-1.8
R65
100K
C41
2.2uF
C42
2.2uF
R66 100K
decoupling
capacitors
C5
100nF
C6
100nF
C7
100nF
C8
100nF
E8
10uF
VCC-3.3 VCC-3.3 VCC-3.3 VCC-3.3
VCC-3.3
C31
100nF
VCC-3.3
decoupling
capacitors
VCC-3.3
J3
J2
STM32F207VGT6
STM32F407VGT6