MeiG
Product
Manual
of
SLM750
Module
SLM750
Module
Hardware
Design
Page 45, total 84 pages
Debug UART interface supports 115200bps baud rate. It can be used for Linux console, log
print.
Table 11: Main UART pin description
Pin name
Pin number
I/O
Description
Note
RXD 68 DI
Receive
data
1.8V
power
domain
TXD 67
DO
Transmit
data
1.8V
power
domain
CTS 64
DI
Clear
to
send
1.8V
power
domain. If unused,
keep it open
RTS 65
DO
DTE
requires
to
transmit data
1.8V power
domain. If unused,
keep it open
RI 62
DO
Ring
indicator
1.8V
power
domain. If unused,
keep it open. The
function is to be
development.
DCD
63
DO
Output carrier detect 1.8V
power
domain. If unused,
keep it open. The
function is to be
development.
DTR
66
DI
DTE ready, sleep
mode control
1.8V power
domain. If unused,
keep it open. The
function is to be
development.
Table 12: Debug UART pin description
Pin name
Pin number
I/O
Description
Note
DBG_RXD 11
DI
Receive
data
1.8V
power
supply domain
DBG_TXD 12
DO
Transmit
data
1.8V
power
supply domain
Table 13: UART logical level
