M10 Hardware Design
Serial port
z
TXD: Send data to the RXD signal line of the DTE
z
RXD: Receive data from the TXD signal line of the DTE
Debug port
z
DBG_TXD: Send data to the /RXD signal line of the DTE
z
DBG_RXD: Receive data from the /TXD signal line of the DTE
The logic levels are described in following table.
Table 9: Logic levels of the serial port and debug port
Parameter
Min
Max
Unit
V
IL
0 0.67 V
V
IH
1.67 VDD_EXT
+0.3
V
V
OL
GND 0.34
V
V
OH
2.0 VDD_EXT
V
Table 10: Pin definition of the serial interfaces
Interface
Name
Pin
Function
DBG_RXD
9
Receive data of the debug port
Debug port
DBG_TXD
10
Transmitting data of the debug port
RI 55
Ring
indicator
RTS 58 Request
to
send
CTS 57 Clear
to
send
RXD
61
Receive data of the serial port
TXD
60
Transmitting data of the serial port
DTR
59 Data
terminal
ready
Serial port
DCD
56
Data carrier detection
M10_HD_V1.00
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Quectel
