N27 Hardware User Guide
Chapter 3 Module Pins
Copyright © Neoway Technology Co., Ltd. All rights reserved.
21
GPIO_37
36
B
P3
GPIO_38
2
35
B
P3
GPIO_51
34
B
P3
GPIO_42
43
B
P3
GPIO_40
44
B
P3
GPIO_46
45
B
With interrupt P3
GPIO_45
61
B
P3
Software (open) version: Do
not use this pin. Leave this pin
floating.
GPIO_47
62
B
With interrupt P3
Software (open) version: Do
not use this pin. Leave this pin
floating.
Antenna Interface
ANT_GNSS
71
AI
GNSS
antenna
50Ω impedance for traces
ANT
59
AIO
Main antenna
50Ω impedance for traces
Other Interface
GNSS_LNA_EN
2
69
DO
GNSS
LNA
enable
P3
Leave this pin floating if it is not
used.
1PPS
1
68
DO
GNSS
one
pulse
per
second
output
Software (open) version: used
as 1PPS. Pulse signal output.
WAKEUP_IN
*
54
DI
Reserved pin P3
The
function
is
in
the
development phase.
USB_BOOT
33
DI
Forcible
download
control
P3
Connect
USB_BOOT
to
VDDIO_1P8 through a pull-up
resistor before the module is
started, and the module will
enter forcible download mode.
RESERVED
53
/
Reserved pin /
Leave it floating.
1
indicates that this pin has different functions between the open version and standard version.
2
Do not pull up these pins to high level or ground them before the module is started completely. otherwise, the
module cannot start up successfully.
