LTE Module Series
EG95 Hardware Design
EG95_Hardware_Design 40 / 81
3.11.
UART Interfaces
The module provides two UART interfaces: the main UART interface and the debug UART interface. The
following shows their features.
The main UART interface supports 9600bps, 19200bps, 38400bps, 57600bps, 115200bps,
230400bps, 460800bps, 921600bps and
3000000bps baud rates, and the default is 115200bps. The
interface can be used for data transmission and AT command communication.
The debug UART interface supports 115200bps baud rate. It is used for
Linux console and log
output.
The following tables show the pin definition of the two UART interfaces.
Table 11: Pin Definition of Main UART Interface
Pin Name
Pin No.
I/O
Description
Comment
RI
39
DO
Ring indicator
1.8V power domain
DCD
38
DO
Data carrier detection
CTS
36
DO
Clear to send
RTS
37
DI
Request to send
DTR
30
DI
Sleep mode control
TXD
35
DO
Transmit data
RXD
34
DI
Receive data
Table 12: Pin Definition of Debug UART Interface
Pin Name
Pin No.
I/O
Description
Comment
DBG_TXD
23
DO
Transmit data
1.8V power domain
DBG_RXD
22
DI
Receive data
1.8V power domain
