Integration Manual

LISA-U2 series - System Integration Manual
UBX-13001118 - R25 System description Page 102 of 182
General purpose input:
All the GPIOs can be configured as input to sense a high or low digital level through the AT+UGPIOR
command, setting the parameter <gpio_mode> of the 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 configured by default as “General purpose input”.
The pin configured to provide the “General purpose input” function is set as
 Input, to sense high or low digital level by the AT+UGPIOR command.
The pin can be connected on the application board to an output pin of an application processor to
sense the digital signal level.
General purpose output:
All the GPIOs can be configured as output to set the high or the low digital level through the
AT+UGPIOW command, setting the parameter <gpio_mode> of the +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 configured by default as “General purpose output”.
The pin configured to provide the “General purpose output” function is set as
 Output / Low, if the parameter <gpio_out_val> of AT+UGPIOW command is set to 0
 Output / High, if the parameter <gpio_out_val> of AT+UGPIOW command is set to 1
The pin can be connected on the application board to an input pin of an application processor to
provide a digital signal.
Pad disabled:
All the GPIOs can be configured in tri-state with an internal active pull-down enabled, as a not used
pin, setting the parameter <gpio_mode> of the +UGPIOC AT command to 255.
The “Pad disabled” 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).
The pin configured to provide the “Pad disabled” function is set as
 Tri-state with an internal active pull-down enabled
Table 42 describes the configurations of all the GPIO pins.
Pin
Name
Description
Remarks
20
GPIO1
GPIO
By default, the pin is configured as Pad disabled.
Can be alternatively configured by the AT+UGPIOC command as:
 Output
 Input
 Network Status Indication
 GNSS Supply Enable
 GSM Tx Burst Indication
 Module Status Indication
21
GPIO2
GPIO
By default, the pin is configured to provide GNSS Supply Enable function.
Can be alternatively configured by the +UGPIOC command as:
 Output
 Input
 Network Status Indication
 Pad disabled