Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R13 System description Page 33 of 119
1.11 General Purpose Input/Output
SARA-R4/N4 series modules include pins 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 [2], +UGPIOC,
+UGPIOR, +UGPIOW AT commands), as summarized in Table 8.
Function Description Default GPIO Configurable GPIOs
Network status indication Network status: registered / data transmission, no service -- GPIO1
GNSS supply enable
21
Enable/disable the supply of a u-blox GNSS receiver connected to
the cellular module by the DDC (I2C) interface
-- GPIO2
GNSS data ready
21
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
Ring Indicator
22
Events indicator -- RI
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
22
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, RI
GPIO1, GPIO2, GPIO3,
GPIO4, GPIO5, GPIO6, RI
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.
21
Not supported by “00” and “01” product versions
22
Not supported by “00”, “01” and SARA-R410M-02B product versions