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CN1
PHONEJACK
STEREO
OUTPUT
C17
100nF
VCC-3.3
C24
100nF
VCC-3.3
C26
100nF
VCC-3.3
C13
100nF
VCC-1.8
C23
100nF
VCC-3.3
C25
100nF
VCC-3.3
C16
100nF
VCC-1.8
C15
100nF
VCC-1.8
C27
100nF
VCC-3.3
C14
100nF
VCC-1.8
R49
R35 27
R43 10
R44 10
1M
R38
100K
R40
100K
R41
100K
R39
100K
R42
10
R45
10
R46
10
LEFT
RIGHT
GBUF
VCC-1.8
VCC-3.3
X3
12.288MHz
C32
22pF
C33
C28 1uF
C29
47nF
C30
10nF
C31
10nF
22pF
U4
P0.18
P0.19
P1.25
P0.22
P0.5
GPIO
P0.6
P0.4
XT
AL
O
XT
AL
O
LEFT
GBUF
RIGHT
LEFT
GBUF
RIGHT
XT
AL
1
XT
AL
1
GPI
O
LINE2
XDCS
IOVDD1
VC
O
DGND1
XT
ALO
XT
ALI
IOVDD2
DGND2
DGND3
DGND4
XC
S
CVDD2
AGND3
LEFT
AV
DD2
RCAP
AV
DD1
GBUF
AGND2
AGND1
RIGHT
AV
DD0
AGND0
GPIO6
GPIO7
RX
GPIO5
TX
SCLK
SI
SO
CVDD3
XTEST
GPIO0
GPIO1
GND
GPIO4
GPIO3
GPIO2
DREQ
CVDD1
IOVDD0
VS1053
CVDD0
DGND0
XRESET
MICN
MICP
R49
470
R50
470
R48
100K
R26
100K
E1
10uF
E9
10uF
C41
C37
L
LEFT
R
3.3nF
3.3nF
R49
470
R50
470
R4
100K
R2
E1
10uF
E9
10uF
C41
C37
L
LEFT
R
RIGHT
3.3nF
3.3nF
Figure 9-3: Audio module connecting schematic