I 2 S A u d i o I / O C a r d
Rev. 0.1
11
6. Schematics
5
5
4
4
3
3
2
2
1
1
D
C
B
A
Tied to Gnd with 0 Ohm Resistor (in AUDIO_PATH)
HEADPHONE JACK
MIC AMP
AUDIO CODEC
A_
G
N
D
A_
G
N
D
P
W
R
_3.
3_B
U
L
K
A_
G
N
D
P
W
R
_3.
3_B
U
L
K
A_
G
N
D
A_
G
N
D
A_
G
N
D
P
W
R
_3.
3_B
U
L
K
P
W
R
_5.
0_B
U
L
K
P
W
R
_5.
0_B
U
L
K
P
W
R
_3.
3_B
U
L
K
P
W
R
_3.
3_B
U
L
K
P
W
R
_3.
3_B
U
L
K
A_
G
N
D
A_
G
N
D
A_
G
N
D
A_
G
N
D
A_
G
N
D
A_
G
N
D
A_
G
N
D
A_
G
N
D
I2
STX_
W
S
_
A
I2
SRX_
W
S
_
A
I2
STX_
SCK_
A
I2
SRX_
SCK_
A
I2
SRX_
SD_
A
TI
M
E
R
_
EX_A
I2
STX_
SD_
A
I2
C_
SDA_
EZR
VM
ID
HP_
R
IG
HT
I2
C
_
S
C
L_E
ZR
H
P
_LE
FT
H
P
_LE
FT
HP_
R
IG
HT
VM
ID
MI
C
-
ADC_
VREF
ADC_
IN
1
MI
C
+
MI
C
-
MI
C
+
Ti
tle
Si
ze
Do
cu
m
en
t Nu
m
b
er
Re
v
D
a
te
:
S
h
eet
of
400 W
C
esar
C
have
z
A
u
st
in
, TX
78701
UPI
O
-U
SB-
AUDI
O
1
.0
I2
S AUDI
O
I
/O
CARD -
AUDI
O
PAT
H
B
15
Fr
iday,
M
a
y 04,
2012
Ti
tle
Si
ze
Do
cu
m
en
t Nu
m
b
er
Re
v
D
a
te
:
S
h
eet
of
400 W
C
esar
C
have
z
A
u
st
in
, TX
78701
UPI
O
-U
SB-
AUDI
O
1
.0
I2
S AUDI
O
I
/O
CARD -
AUDI
O
PAT
H
B
15
Fr
iday,
M
a
y 04,
2012
Ti
tle
Si
ze
Do
cu
m
en
t Nu
m
b
er
Re
v
D
a
te
:
S
h
eet
of
400 W
C
esar
C
have
z
A
u
st
in
, TX
78701
UPI
O
-U
SB-
AUDI
O
1
.0
I2
S AUDI
O
I
/O
CARD -
AUDI
O
PAT
H
B
15
Fr
iday,
M
a
y 04,
2012
C6
2
0.
1uF
C5
8
0.
1uF
C4
6
1uF
+
-
V+
V-
U
15A
M
C
33204
3
2
1
11
4
R6
0
4.
99K
C4
0
1uF
R6
6
100K
C5
4
0.
1uF
R4
3
1.
5k
TP3
H
P
_LE
FT
R4
0
0
C3
6
0.
1uF
C5
9
1uF
+
-
U
15C
M
C
33204
10
9
8
TP12
MI
C
+
W
M
8976
U1
4
LI
P
1
LI
N
2
L2/
G
P
IO
2
3
DNC
4
DNC
5
DNC
6
LR
C
7
BCL
K
8
SDIN
17
MO
D
E
18
AUX
L
19
AUX
R
20
OUT
4
21
OUT
3
22
ROUT
2
23
SPKG
ND
24
LOU
T2
25
VMID
27
AGND
28
ROUT1
29
LOU
T1
30
AVDD
31
MIC
BIA
S
32
ADCDAT
9
DACDAT
10
MCL
K
11
GND
12
DCVDD
13
DBVDD
14
CSB/GP
IO1
15
SCLK
16
EPAD
33
SPKVDD
26
R6
1
154K
C4
3
0.
1uF
C4
7
10uF
MK
2
M
ICRO
PHO
N
E
1
2
R4
4
1.
5k
TP13
LP
1
+
-
U
15D
M
C
33204
12
13
14
TP11
MI
C
-
R6
3
4.
99K
C6
1
2700pF
C4
1
0.
1uF
TP4
HP_
R
IG
HT
C5
5
6.
8pF
R4
1
4.
7K
R6
7
0
NI
JP
4
VAM
P I
m
ea
su
re
C3
7
0.
1uF
C4
8
10uF
R5
6
2K
TP14
LP
2
R6
4
133K
C4
4
0.
1uF
+
C5
6
10uF
R5
7
100K
C4
2
0.
1uF
TP2
SPK_
NEG
R4
2
681
R6
5
9.
76K
C3
3
0.
1uF
SW
1
S
W
_S
LI
D
E
_2P
O
S
1
2
3
R4
5
0
C5
7
0.
1uF
+
-
U
15B
M
C
33204
5
6
7
R5
8
5.
1M
C4
5
1uF
JS
3
Jum
p
er
S
hunt
C6
0
1uF
J9
AUDI
O
J
A
CK
1
3
4
2
R6
2
4.
22K
TP1
SPK_
PO
S
R5
9
154K
C3
4
220pF
C3
5
0.
1uF
C3
9
1uF
C5
3
8.
2nF
Figu
re
8.
UPIO-USB-AUDIO I/O Ca
rd
Schemati
c
(1 of 5
)