Accessory Interface; Power Interface; Audio Interface; Sim Card Interface - SimCom SIM7500 User Manual

Smart Machine Smart Decision

3. Accessory Interface

3.1 Power Interface

Pin
1

3.2 Audio Interface

Headset interface:
Pin
1
2
3
4

3.3 SIM card interface

Main SIMCard holder (J202) is the primary SIM interface, Secondary slot (J203) is for special module which
supports dual sim.
Notice:
Here for SIM7500, just use main SIMcard holder (J202).
SIM7500_EVB Kit_User Guide_V1.01
Signal
Adapter input
Figure4: Audio Interface
Signal
MICN
SPKN
SPKP
MICP
I/O
I 5V/2.0A DC source input
I/O
I Negative microphone input
O Negative receiver output
I Positive receiver output
O Positive microphone input
9
Description
Description
2017-12-12