User's Manual l MBa57xx UM 0100 l © 2020, TQ-Systems GmbH
Page 30
4.2.9
Audio
Audio input and outputs are provided by the audio codec TLV320AIC3204. It is connected to the TQMa57xx via SAI (configured
as I
2
S) and I
2
C. The audio codec provides microphone, line in and line out signals. The signals are routed to 3.5 mm jacks.
Illustration 17:
Block diagram Audio
An assembly option selects between line-out and headphone. The following table shows the possible configuration.
Table 34:
Configuration Line-Out / headphone
Mode
R12
R13
R14
R15
Line-Out (default)
NP
NP
0 Ω
0 Ω
Headphone (optional)
0 Ω
0 Ω
NP
NP
Table 35:
Pinout Line-Out, X16
Pin
Signal
Remark
1
GND_AUDIO
–
2A,2B
AUDIO_OUT_L
1 µF and 100 Ω in series; 47 nF to GND_AUDIO; ESD protection.
Optional connection to HP_L
3
AUDIO_OUT_R
1 µF and 100 Ω in series; 47 nF to GND_AUDIO; ESD protection.
Optional connection to HP_R
Table 36:
Pinout Line-In, X17
Pin
Signal
Remark
1
GND_AUDIO
–
2A,2B
LINE_IN_L
470 nF in series; ESD protection
3
LINE_IN_R
470 nF in series; ESD protection
Table 37:
Pinout Microphone, X18
Pin
Signal
Remark
1
GND_AUDIO
–
2A,2B
MIC_IN
2.2 kΩ in series to MIC_BIAS; ESD protection
3
GND_AUDIO
10 kΩ to GND_AUDIO, right channel not used