Ublox SARA-G450 Series User Manual

SARA-G450 - System integration manual
UBX-18046432 - R08 System description Page 45 of 143
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1.11 General Purpose Input/Output (GPIO)
SARA-G450 modules provide 4 pins (GPIO1, GPIO2, GPIO3, GPIO4), which can be configured as general
purpose input or output, or can be configured to provide special functions via u-blox AT commands
(for further details, see the u-blox AT commands manual [11], +UGPIOC, +UGPIOR, +UGPIOW).
Table 11 summarizes the custom functions available on the GPIO pins of SARA-G450 modules:
Function
Description
Default GPIO
Configurable GPIOs
Network status indication
Network status: registered home network,
registered roaming, voice call or data
transmission, no service
--
GPIO1, GPIO2,
GPIO3, GPIO4
External GNSS supply enable
12
Output to enable/disable the supply of an
external u-blox GNSS receiver connected to
the cellular module by the DDC (I2C) interface
GPIO2
12
GPIO1
12
, GPIO2
12
,
GPIO3
12
, GPIO4
12
Last gasp
12
Input to trigger last gasp notification
--
GPIO1
12
, GPIO2
12
,
GPIO3
12
, GPIO4
12
32.768 kHz output
32.768 kHz clock output
--
GPIO3
General purpose input
Input to sense high or low digital level
--
GPIO1, GPIO2,
GPIO3, GPIO4
General purpose output
Output to set high or low digital level
--
GPIO1, GPIO2,
GPIO3, GPIO4
Pin disabled
Tri-state with an internal active pull-down
enabled
GPIO1, GPIO2
13
,
GPIO3, GPIO4
GPIO1, GPIO2,
GPIO3, GPIO4
Table 11: GPIO custom functions configuration
1.12 Reserved pins (RSVD)
SARA-G450 modules have pins reserved for future use, marked as RSVD.
All the RSVD pins can be left unconnected on the application board, except for the RSVD pin #33 that
can be externally connected to GND or left unconnected too.
12
Not supported by the “00” product version
13
“00” product version only

Ublox SARA-G450 Series Specifications

General

Brand	Ublox
Model	SARA-G450 Series
Category	GSM/GPRS Modules
Language	English