Integration Manual

LISA-U2 series - System Integration Manual
UBX-13001118 - R25 System description Page 101 of 182
 Cyclic Output / High for 100 ms, Output / Low for 100 ms, Output / High for 100 ms, Output / Low
for 2 s, if registered as a visitor 2G network (roaming)
 Cyclic Output / High for 50 ms, Output / Low for 50 ms, Output / High for 50 ms, Output / Low for
100 ms, if registered as a visitor 3G network (roaming)
 Continuous Output / High, if voice or data 2G/3G call enabled
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 it 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 modes, i.e. module switched on), properly setting the
parameter <gpio_mode> of the AT+UGPIOC command to 10.
No GPIO pin is configured by default to provide the “Module status indication”.
The pin configured to provide the “Module status indication” function is set as
 Output / High, when the module is switched on (any operating mode during module normal
operation: idle, active or connected mode)
 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 modes), properly setting the parameter <gpio_mode> of AT+UGPIOC command
to 11.
No GPIO pin is configured by default to provide the “Module operating mode indication”.
The pin configured to provide the “Module operating mode indication” function is set as
 Output / High, when the module is in active or connected mode
 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).