Datasheet
Page 27
R87 100K
R86 100K
C107
2.2uF
C114 2.2uF
VCC-3.3V
Vbat_mcu
SPI2_SCK
SPI2_MISO
SPI2_MOSI
MP3-CS#
MP3-DREQ
MP3-RST#
MP3-DCS
OSC_IN
OSC_OUT
144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
125
124
123
122
121
117
118
119
120
116
115
114
113
112
111
110
109
106
108
107
102
103
104
105
73
30
29
28
27
34
33
58
57
56
55
54
53
52
46
36
35
42
43
44
45
37
50
9
48
49
11
12
32
72
69
68
67
66
65
64
63
4
3
78
77
24
23
18
17
16
15
14
13
5
6
7
8
10
79
80
1
2
22
21
20
19
62
61
60
59
38
39
40
41
47
71
31
51
70
26
25
76
75
74
STM32F407ZG
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PA1
PA0
VDDA
VREF+
PA6
PA5
PE6
VBAT
PC13
PC14
PB10
PE15
PE14
PG0
PC4
PA7
VDD
PF13
PF14
PF15
PC5
PB0
PG6
PG5
PG4
PG8
PG3
PG2
VDD
VSS
PE5
PE4
PC8
PC7
PC6
VDD
VSS
PG7
PF2
PC2
PH0
PF10
PF9
PF8
PF7
PF6
VCAP1
PB11
PE12
PF4
PF1
PF0
VSS
PC9
PA8
PE2
PE3
PC1
PC0
NRST
PH1
PF11
PF12
PE13
PE9
PB1
PB2
PG1
VDD
PA3
PE7
VSS
PD15
VDD
VSS
PF5
PA2
PA4
PE8
PE11
PD14
VSSA
VDD
PC3
PF3
PC15
VDD
PE10
VDD
PD9
PB15
PB12
PB13
PB14
PD8
PD10
PD11
PD12
PD13
PA9
PA11
VDD
VSS
VCAP2
PA13
PA12
PA10
PG12
PG11
PG10
PG14
PG9
PD7
VSS
PD5
PB4
PB3
PG15
VDD
VSS
PG13
PB5
PB6
PD6
VDD
PD0
PC11
PA14
PA15
PC10
PC12
PD1
PD2
PD3
PD4
PB7
PB8
VDD
PDR_ON
PE1
PE0
PB9
BOOT0
101
VSS
U18
R29
R102
27
BAT1
3000TR
OSC32_IN
OSC32_OUT
X5
25MHz
C111
22pF
C110
22pF
X4
32.768KHz
C108
10pF
C109
10pF
OSC32_IN
OSC32_OUT
OSC_IN
OSC_OUT
VCC-3.3V
VCC-3.3V
VCC-3.3V
C118 100nF
C123 100nF
C124 100nF
C125 100nF
C126 100nF
C127 100nF
C130 10nF
C131 1uF
C134 4.7uF
VCC-3.3V
C115 100nF
C116 100nF
C117 100nF
C119 100nF
C120 100nF
C121 100nF
C122 100nF
LEFT
RIGHT
C48
10nF
C46
47nF
C47
10nF
GBUF
C65
100nF
C64
100nF
C63
100nF
C57
100nF
C58
100nF
C56
100nF
C60
100nF
C61
100nF
C62
100nF
VCC-1.8V
C59
2.2uF
VCC-3.3V
E6
10uF
2
3
4
5
6
7
11
12
13
14
25
24
23
22
21
18
17
16
15
8
1
19
9
10 27
26
20
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
MICP/LN1
MICN
XRESET
DGND0
CVDD0
IOVDD0
CVDD1
DREQ
GPIO2
GPIO3
GPIO6
GPIO7
XDCS/BSYNC
IOVDD1
VC0
DGND1
XTAL0
XTAL1
IOVDD2
DGND2
DGND3
DGND4
XCS
CVDD2
GPIO5
RX
TX
SCLK
SI
SO
CVDD3
XTEST
GPIO0
GPIO1
GND
GPIO4
AGND0
AVDD0
AVDD2
AGND1
AGND2
AGND3
LN2
LEFT
RCAP
AVDD1
GBUF
RIGHT
VS1053
U4
1
2
3
IN
GND
OUT
5
4
EN ADJ
U5
AP7331-ADJ
R35
100K
R36
27K4
R37
1K
R23
10
R24
10
R25
10
R19 10
R22 10
VCC-1.8VVCC-3.3V
LEFT
RIGHT
GBUF
C44 1uF
R33
10K
GPIO
GPIO
R26
10K
VCC-3.3V
R28 27
MP3-SOUT
MP3-SIN
MP3-SCLK
MP3-DCS
MP3-DREQ
MP3-RST#
MICN
MP3-CS#
X2
12.288MHz
R34 1M
C55
22pF
C54
22pF
R27
10K
R32
10K
VCC-3.3V
E5
10uF
VCC-3.3V VCC-1.8V
3
1
2
4
CN2
CUI_SJ-43514-SMT
R17 1K
R18
1K
VCC-3.3V
LN-IN_R
C49
100nF
LN-IN_L
MICP
LN-IN_R
C45 100nF
E3
10uF
E2
10uF
R15
470
C43
3.3nF
R16
100K
R13
470
C42
3.3nF
R14
100K
LINE-OUT_L
LINE-OUT_R
E4
10uF
C50
1uF
C51
1uF
C53 10nF
C52 10nF
R31
470
R30
470
MP3-DCS
MP3-DREQ
MP3-RST#
MP3-CS#
LINE-IN_R
LINE-IN_L
R20
10
R21
10
1
2
3
J1
MIC/LN-IN_L
MICP
LN-IN_L
MIC/LN-IN_L
C132
100nF
HDR2
M1X26
Vdc
VCC-3.3V
SPI2_SCK
SPI2_MOSI
SPI2_MISO
LINE-OUT_R
LINE-OUT_L
LINE-IN_L
LINE-IN_R
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
Figure 8-2: Audio module connection schematic