UMTS/HSPA/LTE Module Series
Mini PCIe EVB User Guide
Mini_PCIe_EVB_User_Guide Confidential / Released 21 / 30
Mini PCIe module does not support SIM card detection.
3.5. UART Interface
The UART interface COM of the Mini PCIe EVB is intended for the communication between the module
and the host application. This interface can be used for data transmission and AT communication.
The following figure shows the UART block diagram on Mini PCIe EVB.
RS232
Level Match
Level
Translator
COM
DB9
J301
RS232
3.0V
3.0V or
1.8V
J101
3.0V or 1.8V from J304
U
A
R
T
in
te
rfa
c
e
Figure 17: UART Block Diagram
C5
GND
/
Ground
C6
VPP
/
Not connected
C7
SIM_DATA
I/O
Data line, bi-directional
CD1
/
Not connected
CD2
/
Not connected
NOTE
Quectel
Confidential