SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26 Appendix
Page 201 of 217
Antenna detection interface
An external application circuit can be implemented on the application device integrating SARA-G340 /
SARA-G350 modules to provide antenna detection functionality, with a proper connection between the
ANT_DET pin and the ANT pin, as described in section 2.4.2.
LISA-U2 modules are equipped with internal circuit for antenna detection support.
SARA-G300, SARA-G310 and LISA-C2 series modules do not support antenna detection.
A.4.4 SIM interface
SIM interface
The same compatible external circuit can be implemented for SARA and LISA modules: 1.8 V and 3.0 V SIM are
supported. LISA-C2 modules do not need an external SIM for Sprint and Verizon mobile operators. LISA-C2
series SIM interface is hardware ready but the support of external SIM card / IC will be provided by the upcoming
firmware releases.
SIM detection interface
The same compatible external circuit can be implemented for SARA and LISA modules: SIM detection function is
provided by the SIM_DET pin on SARA-G3 modules and by the GPIO5 pin on LISA-U2 modules. SIM card hot
insertion/removal is additionally supported by all LISA-U2 series except LISA-U200-00S.
LISA-C2 modules do not support SIM detection.
A.4.5 Serial interfaces
UART interface
The same compatible external circuit can be implemented for SARA and LISA modules: a 1.8 V unbalanced
asynchronous serial port with RS-232 functionality is provided on SARA-G3 modules (for AT command, data
communication, MUX functionality, FW upgrade over AT), LISA-C2 modules (for AT command, data
communication, MUX functionality), LISA-U2 modules (for AT command, data communication, MUX
functionality, FW upgrade over AT or using the u-blox EasyFlash tool).
LISA-C2 modules do not support DSR, DCD and DTR functions.
Table 68 and the module’s data sheet [1], [4], [5], [6] report minor differences in the internal pull-ups and drivers
strengths.
These are the default settings of the UART interfaces:
SARA-G3 modules: automatic baud rate and frame format detection
LISA-U2 except LISA-U200-00S modules: one-shot automatic baud rate and frame format detection
LISA-C2, LISA-U1 and LISA-U200-00S modules: 115200 bit/s baud rate and 8N1 frame format
For further details regarding UART interface settings, see the module’s data sheet [1], [4], [5], [6] and the related
AT commands manual of the module [3], [9].
UART AUX interface
Only the SARA-G3 modules provide an auxiliary UART interface for AT commands
51
, GNSS tunneling
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, Firmware
upgrade using the u-blox EasyFlash tool and for diagnostic purposes.
LISA modules do not provide an auxiliary UART interface.
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SARA-G3 modules product versions “00” and “01” do not support AT command mode and GNSS tunneling over the Auxiliary UART.
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