SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11
System description
Page 44 of 157
1.11
General Purpose Input/Output
SARA-R4/N4 series modules include six pins (GPIO1-GPIO6) which can be configured as General Purpose
Input/Output or to provide custom functions via u-blox AT commands (for more details see the SARA-
R4/N4 series AT Commands Manual
, +UGPIOC, +UGPIOR, +UGPIOW AT commands), as summarized
in
Function
Description
Default GPIO
Configurable GPIOs
Network status indication Network status: registered / data transmission, no service --
GPIO1
GNSS supply enable
9
Enable/disable the supply of a u-blox GNSS receiver
connected to the cellular module by the DDC (I2C)
interface
--
GPIO2
Sense when a u-blox GNSS receiver connected to the
module is ready for sending data by the DDC (I2C)
interface
--
GPIO3
SIM card detection
SIM card physical presence detection
--
GPIO5
Module status indication Module switched off or in PSM low power deep sleep
mode, versus active or connected mode
--
GPIO1, GPIO2, GPIO3,
GPIO4, GPIO5, GPIO6
Last gasp
10
Input to trigger last gasp notification
--
GPIO3, GPIO4, GPIO6
General purpose input
Input to sense high or low digital level
--
GPIO1, GPIO2, GPIO3,
GPIO4, GPIO5, GPIO6
General purpose output Output to set the high or the low digital level
--
GPIO1, GPIO2, GPIO3,
GPIO4, GPIO6
Pin disabled
Tri-state with an internal active pull-down enabled
GPIO1, GPIO2, GPIO3,
GPIO4, GPIO5, GPIO6
GPIO1, GPIO2, GPIO3,
GPIO4, GPIO5, GPIO6
Table 8: SARA-R4/N4 series modules GPIO custom functions configuration
1.12
Reserved pins (RSVD)
SARA-R4/N4 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 “00” and “01” product versions
10
Not supported by “00”, “01” and SARA-R410M-02B product versions
