User guide

Evaluation Kit Hardware
4-34 Evaluation Kit (EK) User Guide
11115A–ATARM–27-Jul-11
4.3.3.8 Audio
The Evaluation Kit includes a WM8731 CODEC for digital sound input and output. This interface
includes audio jacks for line audio input (J13) and headphone line output (J15).
The SAM9 processor is configured in IIS slave mode to interface with the WM8731 Codec. The IIS mas-
ter mode is also possible for evaluation by populating R162/R164 and removing the crystal Y3.
Figure 4-27. Audio Interface
R165 0R C48 10u
AUDIO_GND
VDDIOP0
AUDIO_GND
C42 470p
C43 470p
C40 10u
LLINEIN RLINEIN LOUT ROUT
VMIDMICIN
MICBIAS RHPOUT LHPOUT
MODE SDIN SCLK CSB
ADCLRC DBVDD DCVDD AVDD
AGND HPGND
CLKOUT XTI/MCLK XTO
OSC
ADCDAT DACDAT DACLRC DGND BCLK HPVDD
MN10 WM8731SEDS
14
9
10
27
19 20
15
16 4 3 5 7 21
28
1 23 24 22
13 12 18 17
11
2
25 26
6 8
R86 0R
AUDIO_GND
AUDIO_GND
LINE_IN HEADPHONE
VDDIOP0
L3 220ohm at 100MHz
1 2
J13 STEREO_3.5mm
1
34 25
L4 220ohm at 100MHz
1 2
C49 1u C52 1u
C46 10u
C122 22p
C121 22p
R87 33R
L18 220ohm at 100MHz
1 2
R74 5.6K
PA24
R78 5.6K
PA26
VDDIOP0
PA25
VCC_DAC
PA29
TK TD TF
in Slave Mode
IIS of Audio Interface
TWCK0 TWI_addr TWD0
R75 10k
MODE = 0: 2-wire MPU mode for 9x5 TWI interface
PA27
VCC_DAC
CSB = 1: addr=0011011
RF
C117 100n
RD RK
PA31 PA30
PA28
C44 470p
PCK0
AUDIO_GND
R76 10k
AUDIO_GND
R162 0R
DNP
C41 470p
R77 4.7k
PB10
J15 STEREO_3.5mm
1
34 25
R79 4.7k
C115 10u
C47 100n
R80 5.6K
AUDIO_GND
R164 22R DNP
R81
5.6K
C50 100n
Y3 12.288MHz
1 3
24
R91 47k
R90 47k R162 near CODEC
C53 100n
C116 100n
AUDIO_GND
AUDIO_GND
AUDIO_GND
R88 0R
C56 100n
L6 220ohm at 100MHz
1 2
L7 220ohm at 100MHz
1 2
C61 470p
C62 470p
R89 0R
AUDIO_GND
+
C59 220uF/10V
+
C60 220uF/10V
C54 10u
R164 near SODIMM
C51 10u
C55 100n
AUDIO_GND
C45 100n