M72EVB User Guide
M72_EVB_User_Guide_V1.0
15
3.7.1 RS232
Figure 11: RS232 points
Table 8: Pins of J1
Pin
Signal
I/O
Description
1
TXD
O
Transmit data
2
RXD
I
Receive data
3
DCD
O
Data carrier detection
4
RI
O
Ring indicator
5
CTS
O
Clear to send
6
GND
Ground
7
DTR
I
Data terminal ready
8
DBG_RXD
I
Receive data
9
RTS
I
Request to send
10
DBG_TXD
O
Transmit data
Quectel
Confidential
