N27 Hardware User Guide
Chapter 3 Module Pins
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17
Used to control the module
startup,
shutdown,
and
wakeup from PSM.
STATUS
56
DO
Startup
indicator
P3
Used to indicate the startup
status of the module
Leave this pin floating if it is not
used.
NET_LIGHT
57
DO
Network
status
indicator
P3
Leave this pin floating if it is not
used.
WAKEUP_OUT
55
DO
Wake up the
device
P3
Wake-up pin. Leave this pin
floating if it is not used.
UART0 Interface
UART0_TXD/UA
RT1_TXD
1
48
DO
Data TX
P3
Software (standard) version:
used as UART0_TXD and
used for data transmission.
Leave this pin floating if it is not
used.
Software (open) version: used
as UART1_TXD and used for
data transmission and log
printing. Leave this pin floating
if it is not used.
UART0_RXD/UA
RT1_RXD
1
49
DI
Data RX
P3
Software (standard) version:
used as UART0_RXD and
used for data transmission.
Leave this pin floating if it is not
used.
Software (open) version: used
as UART1_RXD and used for
data transmission and log
printing. Leave this pin floating
if it is not used.
UART1_CTS
1
50
DI
Clear to send P3
Software (open) version: used
as UART1_CTS and used for
data transmission and log
printing. Leave this pin floating
if it is not used.
UART1_RTS
1
51
DO
Request
to
send
P3
Software (open) version: used
as UART1_RTS and used for
data transmission and log
printing. Leave this pin floating
