Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Scheda Tecnica
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AT91SAM9N12-EK
4-14
SAM9N12/CN11-EK User Guide
11186A–ATARM–29-Nov-12
4.3.15
Audio
The SAM9N12/CN11-EK includes a WM8904 audio CODEC for digital sound input and output. This
interface includes features and audio jacks for:
interface includes features and audio jacks for:
Line In (J13)
Headphone output (J15)
Microphone on board
The SAM9N12/CN11 programmable clock output PCK0 is used to generate the WM8904 master clock
(MCLK).
(MCLK).
The bit clock is shared; it can be the SSC Transmitter Clock (TK) or the Receiver Clock (RK). The default
setting on SAM9N12/CN11-EK is TK and RK shorted together through R159/R160. Please note that try-
ing different ADC/DAC rates would mean different RK/TK rates; this default setting can be modified.
setting on SAM9N12/CN11-EK is TK and RK shorted together through R159/R160. Please note that try-
ing different ADC/DAC rates would mean different RK/TK rates; this default setting can be modified.
The 0-ohm resistors R159 to R163 have been implemented to offer a disconnection possibility (freeing
these dedicated PIO lines for other custom usages).
these dedicated PIO lines for other custom usages).
Figure 4-18. Audio CODEC
L15
10uH/ 150m A
C109
4. 7uF
4. 7uF
L14
220ohm at 100MHz
1
2
R157
1R
(TWD0)
PA 31
PA 30
PA 30
(TWCK 0)
L19
220ohm at 100MHz
1
2
+3V 3
AV DD1V8
+
C100
10uF
10uF
AGND_AUDI O
AV DD1V8
MN17
WM8904
SCLK
2
SDA
3
MCLK
28
BCLK /GP IO4
29
I N1L/ DMICDA T1
27
I N1R/ DMICDA T2
25
IN
2
L
26
IN
2
R
24
DG
ND
5
LRCLK
30
DACDA T
32
ADCDA T
31
GPI O1/ IRQ
1
HP OUTL
13
HP OUTR
15
HP OUTFB
14
LINE OUTL
16
LI NE OUTR
18
LINE OUTFB
17
CPV DD
7
CPCA
8
CPCB
10
CPV OUTP
11
CPV OUTN
12
MI
C
B
IA
S
20
MI CVDD
19
CPGND
9
VM
ID
C
21
AVD
D
23
DCV
DD
6
DB
V
DD
4
G
N
D_
P
A
DDL
E
33
AG
N
D
22
R159
0R
R160
0R
PA 28
PA 24
(TK)
(RK )
(RK )
A UD_1V8
C105
220pF
220pF
AGND_A UDIO
R168
2. 2K
2. 2K
R192
0R
R193
0R
C104
220pF
220pF
AVDD
R194
0R
R195
0R
C101
100nF
100nF
C125
220pF
220pF
C124
220pF
220pF
A GND_AUDI O
R173
DNP
DNP
R174
DNP
DNP
C114
2. 2uF
2. 2uF
C117
100nF
100nF
J15
LI NE IN
4
1
5
2
3
R155
20R
20R
C103
100nF
100nF
AGND_AUDI O
+3V3
R163
0R
(TD)
(RD)
(RD)
PA 27
PA 26
AUD_1V8
C108
4. 7uF
4. 7uF
J13
HE ADP HONE
4
1
5
2
3
R162
0R
(RF )
PA 29
MIC1
1
2
C107
100nF
100nF
C113
2. 2uF
2. 2uF
C116
2. 2uF
2. 2uF
C115
2. 2uF
2. 2uF
R161
0R
C106
10uF
10uF
C102
100nF
100nF
AGND_AUDI O
C119
4. 7uF
4. 7uF
AGND_AUDI O
R158
22R
(P CK0)
PB 10
C118
4. 7uF
4. 7uF
C120
1uF
1uF
PA 25
R191
0R
AGND_A UDIO
(TF)
A GND_AUDI O
AGND_AUDI O
A GND_A UDI O
R152
3.9K
3.9K
AGND_A UDIO
R153
3.9K
3.9K
R154
20R
20R
A UD_1V8
+1V8
C142
1uF
1uF
C121
1uF
1uF
A GND_AUDI O
C99
100nF