Smart Machine Smart Decision
4.2 Audio Interface
Figure 6: Audio Interface
J306 is the handset interface. X501 is the headset interface.
NOTE: The MIC’s polarity must be correct.
Table 3: The Pin Description of the
Handset
and Headset Interfaces
No.
Signal
Input/Output
Description
1
MIC1_P
I
Positive microphone input
2
EAR_P
O
Positive receiver output
3
EAR_N
O
Negative receiver output
4
MIC1_N
I
Negative microphone input
5 GND
Ground
6
HEAD
I
Headset microphone input
7
HPH_L
O
Positive microphone output
8 HPH_R
O
Negative
microphone
output
NOTE:
1) Please refer Figure 1.The Pin 1 and Pin 2 of J501 are the SPK_M and SPK_P.
2) Audio cable must be away from the RF antenna, otherwise TDD noise may be occurred.
SIM7100x EVB User Guide
2015-07-20
13
DISTRIBUTED BY TEXIM EUROPE
