EVB User Guide
M80_EVB_UGD_V1.0
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Table 10: Pins of UART port3
1-1
1-2
1-3 1-4 1-5
1-7 1-8
1-9
Figure 11: Main UART
Table 11: Pins of serial port
Pin
Signal
I/O
Description
Note
1_1
DCD
O
Data carrier detection
1_2
TXD
O
Transmit data
1_3
RXD
I
Receive data
1_4
DTR
I
Data terminal ready
1_5
GND
Ground
1_7
RTS
I
Request to send
1_8
CTS
O
Clear to send
1_9
RI
O
Ring indicator
Pin
Signal
I/O
Description
Note
1_1
TXD_AUX
O
Transmit data
1_2
RXD_AUX
I
Receive data
1_3
GND
Ground
Quectel
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