SARA-G3 series - System Integration Manual
UBX-13000995 - R06
Objective Specification
System description
Page 73 of 218
The pin configured to provide the “GNSS supply enable” function is set as
o
Output / High, to switch on the u-blox GNSS receiver, if the parameter <mode> of
AT+UGPS command is set to 1
o
Output / Low, to switch off the u-blox GNSS receiver, if the parameter <mode> of
AT+UGPS command is set to 0 (default setting)
GNSS data ready
:
Only the
GPIO3
pin provides the “GNSS data ready” function, to sense when a u-blox GNSS
receiver connected to the wireless module is ready to send data via the DDC (I
2
C) interface, setting
the parameter <gpio_mode> of AT+UGPIOC command to 4.
The pin configured to provide the “GNSS data ready” function is set as
o
Input, to sense the line status, waking up the wireless module from idle-mode when the u-
blox GNSS receiver is ready to send data via the DDC (I
2
C) interface; the parameter
<mode> of AT+UGPS command must be set to 1 and the parameter <GPS_IO_configuration>
of AT+UGPRF command to 16
o
Tri-state with an internal active pull-down enabled, otherwise (default setting)
GNSS RTC sharing
:
Only the
GPIO4
pin provides the “GNSS RTC sharing” function, to provide an RTC (Real Time
Clock) synchronization signal to the u-blox GNSS receiver connected to the wireless module, setting
the parameter <gpio_mode> of AT+UGPIOC command to 5.
The pin configured to provide the “GNSS RTC sharing” function is set as
o
Output, to provide an RTC (Real Time Clock) synchronization signal to the u-blox GNSS
receiver if the parameter <mode> of AT+UGPS command is set to 1 and parameter
<GPS_IO_configuration> of AT+UGPRF command is set to 32
o
Output / Low, otherwise (default setting)
General purpose input
:
All the GPIOs can be configured as input to sense high or low digital level through AT+UGPIOR
command, setting the parameter <gpio_mode> of AT+UGPIOC command to 1.
The “General purpose input” mode can be provided on more than one pin at a time: it is possible to
simultaneously set the same mode on another pin (also on all the GPIOs).
No GPIO pin is by default configured as “General purpose input”.
The pin configured to provide the “General purpose input” function is set as
o
Input, to sense high or low digital level by AT+UGPIOR command.
General purpose output
:
All the GPIOs can be configured as output to set the high or the low digital level through
AT+UGPIOW command, setting the parameter <gpio_mode> of +UGPIOC AT command to 0.
The “General purpose output” mode can be provided on more than one pin per time: it is possible to
simultaneously set the same mode on another pin (also on all the GPIOs).
No GPIO pin is by default configured as “General purpose output”.
