User Manual - Rev1.0.2
M13design - 16 Dec. 21
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3.7
AUDIO INTERFACE
The
M13-RA6M3-EK
is equipped with a Maxim Audio CODEC (U13) for audio features. It’s
configurations and controls are done through the I²C interface using channel 0. While the exchange of
audio data is done using the Serial Sound Interface (SSIE) channel 0.
The output uses a single 4-pole 3.5mm audio jack connector for connecting a headset in single-ended
mode. See section
for a detailed description on the headset configuration.
As the Audio CODEC is configurated and used in Master Mode, its operating clock is directly provided
from an external 13MHz oscillator and not from the RA6M3. See
for its pin assignment and
for a full illustration of the Audio Block Diagram.
Table 22. Audio CODEC Overview
Device Type
MFR
1
/ MPN
2
Operational Voltage
I²C Address
Package
Audio CODEC
Maxim / MAX9867ETJ
1.8V
W: 0011 0000 (0x30)
R: 0011 0001 (0x31)
QFN32
Note 1: Manufacturer name
Note 2: Manufacturer Part Number
Table 23. Audio Pin Assignment
U1 Pin
RA6M3 Pin Functions
Board
Assignment
Signal Name
Default
Function
Remarks
165
P004 / IRQ9DS
IRQ9DS
AUDIO_IRQ9
IRQ
95
P114 / SSIRXD0_B / A02
Multiplexed
SSIRXD0_B
SSIE0
96
P115 / SSITXD0_B / A01
Multiplexed
SSITXD0_B
SSIE0
94
P113 / SSILRCK0 / A03
Multiplexed
SSILRCK0
SSIE0
93
P112 / SSIBCK0_B / A04
Multiplexed
SSIBCK0_B
SSIE0
52
P204 / SCL0_B
Main I²C bus
SCL0
IIC0
44
P407 / SDA0_B
Multiplexed
SDA0
IIC0
N/A
N/A
N/A
AUDIO_MCLK
N/A
X5 – 13MHz
Figure 11. Audio Block Diagram
for a full description of the multiplexed GPIOs of the SSIE bus.
P005 / IRQ10DS
AUDIO CODEC
4-POLE
AUDIO JACK
AUDIO OUTPUT SIGNALS
/IRQ
SCL
SDA
BCLK
LRCLK
SDOUT
MCLK
P204
P407
P112
P113
P114
P115
SDIN
RA6M3
SDRAM
A4
A3
A2
A1
24
25
26
29
164
82
81
93
94
95
96
3V3D
3V3D
C
11
4
10
0n
F
3V3D
R
61
10
K
R
12
9
10
K
STDBY
GND
VDD
OUT
1
2
4
3
13MHz
X5
831056290
Wurth Electronics
SH13
0R
SH15
0R
SH17
0R
S
H
14
0R
S
H
16
0R
S
H
18
0R
S
H
20
0R
SH19
0R
SH39
0R
AUDIO_IRQ9
SSILRCK0
SDA0_B
SSIBCK0_B
SCL0_B
SSIRXD0_B
SSITXD0_B