Uart Interface (J301) - Quectel Mini PCIe-C EVB User Manual

C5 GND
C6 VPP
C7 SIM_DATA
CD1
CD2

4.5. UART Interface (J301)

The UART interface of the Mini PCIe-C EVB is intended for the communication between the module and
the host application. It can be used for data transmission and AT command communication.
The following figure shows the block diagram of the UART interface on Mini PCIe-C EVB.
COM
DB9
J301
Mini_PCIe-C_EVB_User_Guide
/
/
I/O
/
/
RS232
RS232
Level Match
Figure 23: Block Diagram of UART Interface
UMTS/HSPA+/LTE Standard Module Series
Mini PCIe-C EVB User Guide
Ground
Not connected
Data line.
Bidirectional
Not connected
Not connected
1.8V
3.0V
Level
Translator
J101
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