Installation Instructions

LISA-U2 series - System Integration Manual
UBX-13001118 - R19 Early Production Information System description
Page 98 of 175
The pin configured to provide the “Network status indication” function can be connected on the application
board to an input pin of an application processor or can drive a LED by a transistor with integrated resistors
to indicate network status.
 Module status indication:
The GPIO1 and GPIO13 pins can be configured to indicate module status (power-off mode, i.e. module
switched off, versus idle, active or connected mode, i.e. module switched on), properly setting the
parameter <gpio_mode> of AT+UGPIOC command to 10.
No GPIO pin is by default configured to provide the “Module status indication”.
The pin configured to provide the “Module status indication” function is set as
o Output / High, when the module is switched on (any operating mode during module normal
operation: idle, active or connected mode)
o Output / Low, when the module is switched off (power off mode)
The “Module status indication” mode can be provided only on one pin at a time: it is not possible to
simultaneously set the same mode on another pin.
 Module operating mode indication:
The GPIO14 and GPIO5 pins can be configured to indicate module operating mode (idle-mode versus active
or connected mode), properly setting the parameter <gpio_mode> of AT+UGPIOC command to 11.
No GPIO pin is by default configured to provide the “Module operating mode indication”.
The pin configured to provide the “Module operating mode indication” function is set as
o Output / High, when the module is in active or connected mode
o Output / Low, when the module is in idle-mode (that can be reached if power saving is enabled by
+UPSV AT command: for further details see the u-blox AT Commands Manual [2])
The “Module operating mode indication” mode can be provided only on one pin at a time: it is not possible
to simultaneously set the same mode on another pin.
 I
2
S digital audio interface:
The GPIO6, GPIO7, GPIO8, GPIO9 pins are by default configured as the second I
2
S digital audio interface
(I2S1_RXD, I2S1_TXD, I2S1_CLK, I2S1_WA respectively).
Only these pins can be configured as the second I
2
S digital audio interface, correctly setting the parameter
<gpio_mode> of AT+UGPIOC command to 12 (default setting).
 SPI serial interface:
GPIO10, GPIO11, GPIO12, GPIO13 and GPIO14 pins are by default configured as the SPI / IPC serial
interface (SPI_SCLK, SPI_MOSI, SPI_MISO, SPI_SRDY and SPI_MRDY respectively).
Only these pins can be configured as the SPI / IPC serial interface, correctly setting the parameter
<gpio_mode> of AT+UGPIOC command to 13 (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.