SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification Appendix
Page 192 of 218
A.3 Software migration
Software migration between SARA-G3 and LISA wireless modules is a straightforward procedure.
Nevertheless there are some differences to be considered with firmware version. Each wireless module
supports AT commands according to 3GPP standards:
TS 27.007
[10],
TS
27.005
[11],
TS
27.010
[12]
and the u-blox AT command extension. Backward compatibility has been maintained as far as possible.
For the complete list of supported AT commands and their syntax refer to the relevant AT
commands manual of the module [2], [8].
A.4 Hardware migration
SARA-G3 series modules have been designed with backward compatibility to LISA series modules in mind
but some minor differences were unavoidable. These minor differences are however not relevant for the
majority of the designs.
The following subsections describe the hardware differences between the interfaces of SARA-G3 series
modules and LISA series modules while Table 42Table 42 summarizes the detailed differences between the
pins.
A.4.1 Supply interfaces
Module supply input (VCC)
The same compatible external circuit can be implemented for SARA-G3 and LISA even if there are minor
differences in the VCC input voltage ranges and some differences in the current consumption figures.
The voltage provided must be within the normal operating range limits to allow module switch-on and must
be above the minimum limit of the extended operating range to avoid module switch-off. For the detailed
VCC input voltage ranges values refer to Table 42Table 42 or to the relative datasheet of the module
[1], [3], [4], [5].
The SARA-G3 maximum average current consumption is lower than the LISA one due to the lower data
rate or the different channel access technology. SARA-G3 modules require large current pulses in
connected-mode as well as LISA-U series when a 2G call is enabled. LISA-C2 series do not require
large current pulses due to the CDMA channel access technology. For the detailed current consumption
values refer to the relevant module datasheet [1], [3], [4], [5].
Detailed supply circuit design-in guidelines are reported in section 2.1.1 and in the relative System
Integration Manual of the module [6], [7].
RTC supply input/output (V_BCKP)
The same compatible external circuit can be implemented for SARA-G3 series and LISA-U series even if
there are minor differences in the V_BCKP typical output voltage and input voltage range as reported in
Table 42Table 42 or in the relative datasheet of the module [1], [3], [4], [5]. LISA-C2 series do not
provide V_BCKP RTC supply input/output as well as the whole RTC functionality.
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