Page 27
VCC-3.3V
C2
22pF
C3
22pF
X1
16
M
H
z
AVCC
R4
9
27
R5
0
27
SC
K0
-P
A2
M
O
SI
0-
PA
5
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
TM4C123GH6PZ
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
10
0
PA
7
PA
6
G
N
D
VD
D
PF
2
PF
1
VDD
GND
VDDA
VREFA+
PJ1
PJ0
VDD
VDD
VD
D
PF
3
XOSC0
GNDX
XOSC1
VBAT
G
N
D
PK
3
PB
5
PE
7
PE
6
VD
D
PG
7
PG
6
PC
1/
TM
S/
SW
D
IO
PC
2/
TD
I
PD3
PD2
PD
5
PD
4
PE
5
PE
4
G
N
D
PB
4
PE3
PA
2
PC6
PC7
GND
VDD
PH3
PH2
USBVBUS/PB1
USBID/PB0
HIB
OSC0
PE1
PJ2
GNDA
VD
D
C
PD
6
PD
7
PD0
PD1
PA
1
PA
0
PC4
PC5
PK
0
W
AK
E
OSC1
PG2
PK
2
PK
1
GND
PF
4
PF
5
PF7
PG1
VD
D
C
PH1
PH0
PE0
PF
6
PF
0
PG3
GND
PC
0/
TC
K/
SW
CL
K
PA
5
PA
4
PA
3
PE2
VREFA-
PG0
RST
PB2
PH
5
PH
7
PB3
PG4
PG5
PH
6
PH
4
VD
D
G
N
D
PC
3/
TD
O
/S
W
O
U1
TM4C123GH6PZ
VDDC
VDDC
C6
10pF
C7
10pF
X2
32
.7
68
KH
z
C14
100nF
C15
100nF
C16
100nF
C17
100nF
E1
10uF
VCC-3.3VVCC-3.3VVCC-3.3VVCC-3.3V
VCC-3.3V
C18
100nF
VCC-3.3V
C46
100nF
VCC-3.3V
C47
100nF
VCC-3.3V
C48
100nF
VCC-3.3V
C11
100nF
VDDC
C10
1uF
VDDC
C13
100nF
VDDC
C12
1uF
VDDC
M
IS
O
0-
PA
4
M
P3
-C
S#
M
P3
-D
RE
Q
M
P3
-R
ST
#
M
P3
-D
CS
CN7
C30
100nF
C31
100nF
VCC-1.8V VCC-1.8V
C33
100nF
C32
100nF
VCC-1.8V VCC-1.8V
C35
100nF
C36
100nF
VCC-3.3V
C37
100nF
VCC-3.3V
C38
100nF
VCC-3.3V VCC-3.3V
C39
100nF
VCC-3.3V
C45
1uF
VCC-3.3V
C26
22pF
C25
22pF
R14 1M
R22
10K
R24 10K
R6
10K
R15
10K
X3
12.288MHz
C24
1uF
G
PI
O
LEFT
RIGHT
GBUF
E3
10uF
E2
10uF
CN1
PHONEJACK
LEFT
RIGHT
C28
10nF
C29
47nF
C27
10nF
R18
10
R16
10
R17
10
R11
10
R13
10
R8
470
C23
3.3nF
R9
100K
R5
470
C21
3.3nF
R7
100K
L
R
R23
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
IC
N
XR
ES
ET
D
G
N
D
0
CV
D
D
0
IO
VD
D
0
CV
D
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
RX TX SC
LK
SI SO CV
D
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
U3
VCC-1.8V
VCC-3.3V
R51
10
R52
10
MP3-CS#
M
P3
-D
RE
Q
M
P3
-R
ST
#
MP3-DCS
M
O
SI
0-
PA
5
M
IS
O
0-
PA
4
SC
K0
-P
A2
HDR2
M1X26
VCC-3.3V
L
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 8-3: Audio module connection schematic
decoupling
capacitors
dec
oup
lin
g
cap
ac
it
or
s