User`s manual

RTD Embedded Technologies, Inc. | www.rtd.com 12 COM16155ER/COM16155RER User’s Manual
Table 5: CN6 SIM Pin Assignment
Vcc
2
1
GND
GND
4
3
Reset
GND
6
5
I/O
Card Detect
8
7
CLK
GND
10
9
Vcc
The figure below shows a picture of the external SIM card interface board.
Figure 3: ESIM2035 Board
CN7: GSM Headset Connector
The COM16155 Headset connector is used to connect a headset to the GSM module for voice operation. The pin-out of the
external connector CN5 is shown below.
Table 6: CN7 GSM Headset Pin Assignment
MICP
2
1
GND
EPP
4
3
MICN
VMICP
6
5
EPN
Reserved
8
7
VMICN
GND
10
9
Reserved