Page 31
Figure 8-3: Audio module connection schematic
VCC-3.3
R5
27
R4
27
VREF-1.8
C31
22pF
C30
22pF
X3
32.768KHz
C2
22pF
C1
22pF
X1
8MHz
E9
10uF
MOSI2-RG8
SCK2-RG6
M
P3
-D
CS
M
P3
-C
S#
M
P3
-R
ST
#
M
P3
-D
R
EQ
SOSCO
SOSCI
CLKO
CLKI
MISO2-RG7
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
73
dsPIC33FJ256GP710A
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
10
0
R
B1
1
R
B10
/A
N
10
R
B9
/A
N
9
R
B8
/A
N
8
R
B1
3
R
B1
2
RE7
RC1
RC2
RC3
RA15
SCL1/RG2
R
B1
5
R
B1
4
SDO1/RF8
SDI1/RF7
SCK1/RF6
SDA1/RG3
GN
D
VC
C
R
A6
R
G
0
R
G
1
RE
0
R
F1
R
F0
R
D
7
R
D
6
RE6
RE5
RE
2
R
G
13
R
G
12
R
G
14
RE
1
R
A7
RG8/SDO2
R
A9
/Vr
ef
-
RB1
RB2/AN2
RB3
RB4
RB5
RA13
RD9
RD8
U1RX/RF2
U1TX/RF3
GND
RG7/SDI2
RG6/SCK2
R
A1
RE
3
RE
4
RG15
VCC
R
B7
/P
G
ED
1
R
B6
/P
G
EC1
RB0
R
F4
R
F5
RA14
RA5
R
D
14
R
D
15
RA2
R
F1
3
VC
C
RA3
VCC
VC
C
RA12
RA0
VCC
GN
D
R
F1
2
RA4
GND
VCA
P
AGN
D
AV
CC
R
A1
0/
Vr
ef
+
MCLR
RC4
CLKI/RC12
CLKO/RC15
RD10
R
D
3
R
D
1
SOSCI/RC13
SOSCO/RC14
GND
R
D
2
R
D
12
R
D
13
R
D
4
R
D
5
RG9
RD11
RD0
U1
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
GP
IO
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
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
M
CP
/L
N
1
M
ICN
XR
ESE
T
D
GN
D
0
CV
DD
0
IO
VDD
0
CV
DD
1
D
R
EQ
GP
IO
2
GP
IO
3
GP
IO
6
GP
IO
7
XDCS/BSYNC
IOVDD1
VC0
DGND1
XTAL0
XTAL1
IOVDD2
DGND2
DGND3
DGND4
XCS
CVDD2
GP
IO
5
R
X
TX SC
LK
SI SO CV
DD
3
XT
ES
T
GP
IO
0
GP
IO
1
GN
D
GP
IO
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
#
MP3-DCS
M
O
SI2
-R
G
8
SC
K2
-R
G
6
M
IS
O
2-
R
G
7
C5
100nF
C6
100nF
C7
100nF
E8
10uF
VCC-3.3 VCC-3.3 VCC-3.3
VCC-3.3
C8
100nF
VCC-3.3
decoupling capacitors
decoupling capacitors