Quectel UC20

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 22 / 32
Figure 17: Main UART Port (J401)
Table 8: Pin Assignment of J401
J401 Pin
Signal Name
I/O
Description
1
RS232_DCD
O
Data carrier detection
2
RS232_RXD
I
Receive data
3
RS232_TXD
O
Transmit data
4
RS232_DTR
I
Data terminal ready
5
RS232_GND
/
GND
6
NC
/
NC
7
RS232_RTS
I
Request to send
8
RS232_CTS
O
Clear to send
9
RS232_RI
O
Ring indicator
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