User's Manual

SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R18 Advance Information System description
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Audio analog front-end
The SARA-U201 module integrates only a baseband memory SiP including a NAND flash non-volatile
memory and a RAM volatile memory
x Memory system in a multi-chip package integrating two devices
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:
NOR flash non-volatile memory
RAM volatile memory
x Voltage regulators to derive all the system supply voltages from the module supply VCC
x Circuit for the RTC clock reference in low power idle-mode:
SARA-G340, SARA-G350 and SARA-U2 series modules are equipped with an internal 32.768 kHz crystal
connected to the oscillator of the RTC (Real Time Clock) block that gives the RTC clock reference needed
to provide the RTC functions as well as to reach the very low power idle-mode (with power saving
configuration enabled by the AT+UPSV command).
SARA-G300 and SARA-G310 modules are not equipped with an internal 32.768 kHz crystal: a proper
32 kHz signal must be provided at the EXT32K input pin of the modules to give the RTC clock reference
and to provide the RTC functions as well as to reach the very low power idle-mode (with power saving
configuration enabled by AT+UPSV). The 32K_OUT output pin of SARA-G300 and SARA-G310 provides
a 32 kHz reference signal suitable only to feed the EXT32K input pin, furnishes the reference clock for
the RTC, and allows low power idle-mode and RTC functions support with modules switched on.
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In all SARA-U2 series and SARA-G3 series modules except for the SARA-U201 modules