User's Manual l MBa8Xx UM 0100 l © 2020, TQ-Systems GmbH
Page 20
3.8
Data interfaces
3.8.1
Audio
The audio codec used is the Texas Instruments TLV320AIC3204. It is connected to the TQMa8Xx via SAI (configured as I²S) and I
2
C.
The audio codec provides microphone, line-in and line-out signals. The signals can be accessed via colour coded 3.5 mm jacks.
TQMa8Xx
SAI1
I2C1
Audio
Codec
TLV320
3.5 mm Jack
(X8)
3.5 mm Jack
(X10)
3.5 mm Jack
(X9)
Mic
Line-Out
Line-In
Figure 8:
Block diagram Audio
Figure 9:
Pinout 3.5 mm jack
Table 20:
Pinout Audio (X8, X9, X10)
Channel
Pin
Signal
Dir.
Level
Remark
MIC (X8)
1
AGND_AUD
P
0 V
Ground (filtered from GND)
2
MIC_IN_L
A
I
0.9 V
Mic left (Mono)
3
MIC_IN_R
A
I
0.9 V
Mic right (not used
Pull-Down to AGND_AUD)
Line-In (X9)
1
AGND_AUD
P
0 V
Ground (filtered from GND)
2
LINE_IN_L
A
I
1.65 V Line-In left
3
LINE_IN_R
A
I
1.65 V Line-In right
Line-Out (X10)
1
AGND_AUD
P
0 V
Ground (filtered from GND)
2
LINE_OUT_L
A
O
1.65 V Line-Out left
3
LINE_OUT_R
A
O
1.65 V Line-Out right
