SARA-N2 / N3 series - System integration manual
UBX-17005143 - R13
System description
Page 29 of 95
C1-Public
SARA-N3 series modules include General Purpose Input/Output pins that can be configured via u-blox
AT commands (for further details, see the AT commands manual
, +UGPIOC, +URING AT
commands).
The internal power domain for the GPIO pins is
V_INT
, with 1.8 V or 2.8 V voltage value set according
to external
VSEL
pin configuration.
summarizes the custom functions available on the GPIO pins of SARA-N3 series modules.
Function
Description
Default GPIO
Configurable GPIOs
Network status indication
Output to indicate the network status:
registered home network, registered
roaming, data transmission, no service
--
GPIO1, GPIO2, CTS
Module status indication
Output indicating module status: power-off,
sleep or deep-sleep mode versus idle, active
or connected mode
--
GPIO4
Last gasp
Input to trigger last gasp execution
--
GPIO3
SIM card detection
Input to sense external SIM card physical
presence
GPIO5
9
GPIO5
HW flow control (RTS)
UART request to send input
RTS
RTS
HW flow control (CTS)
UART clear to send output
CTS
CTS
Ring indication
UART ring indicator output
RI
RI
General purpose input
Input to sense high or low digital level
--
GPIO1, GPIO2,
GPIO3, GPIO4, GPIO5,
RI, RTS, CTS
General purpose output
Output to set high or low digital level
--
GPIO1, GPIO2,
GPIO3, GPIO4, GPIO5,
RI, RTS, CTS
Pin disabled
Output tri-stated, with an internal active
pull-down enabled
GPIO1, GPIO2,
GPIO3, GPIO4,
GPIO5
10
GPIO1, GPIO2,
GPIO3, GPIO4, GPIO5
RI, RTS, CTS
Table 8: GPIO custom functions configuration of SARA-N3 series modules
1.12
Reserved pins (RSVD)
SARA-N2 / N3 series modules have pins reserved for future use, marked as
RSVD
.
All the
RSVD
pins are to be left unconnected on the application board, except for the
RSVD
pin number
33
that can be externally connected to ground.
9
Not supported by SARA-
N3 “00” product version.
10
On SARA-
N3 “00” product version only.
