u-blox SARA-G3 Series - A.4.7 GPIO Pins; GPIO Pins; Reserved Pins

SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification Appendix
Page 200 of 218
An additional digital audio interface is provided on I2S1_TXD, I2S1_RXD, I2S1_CLK, I2S1_WA pins of all
LISA-U2 series except LISA-U200-00S (1.8 V, PCM & Normal I2S modes, master & slave,
configurable sample rate).
SARA-G300/G310, LISA-U100/U110, LISA-U200-00S modules do not provide digital audio interfaces.
For further details regarding digital audio interfaces characteristics, usage, and settings, refer to the relevant
module datasheet [1], [3], [4], [5], System Integration Manual 1.10.2, 2.6.2, [6], [7], and AT
commands manual [2], [8].
A.4.7 GPIO pins
The same compatible external circuit can be implemented for SARA-G350 and LISA series: four 1.8 V
GPIOs are provided by SARA-G350 modules, providing the same functionalities as LISA series modules
except Module Status and Operating Mode Indications. The SIM_DET pin provides the SIM detection
function on SARA-G3 series modules rather than the GPIO5 pin as on LISA-U series modules.
SARA-G300 and SARA-G310 modules do not provide GPIOs.
A.4.8 Reserved pins
SARA-G3 series modules RSVD pin 33 must be connected to ground, as does the RSVD pin 5 on
LISA series modules.