User's Manual

SARA-G3 and SARA-U2 series - System Integration Manual
1.3 Pin-out
Table 4 lists the pin-out of the SARA-G3 and SARA-U2 series modules, with pins grouped by function.
Function Pin Name Module Pin No I/O Description Remarks
Power VCC All 51, 52, 53 I Module supply
input
VCC pins are internally connected each other.
VCC supply circuit affects the RF performance and
compliance of the device integrating the module
with applicable required certification schemes.
See section 1.5.1 for functional description and
requirements for the VCC module supply.
See section 2.2.1 for external circuit design-in.
GND All 1, 3,
5, 14,
20-
22, 30,
32, 43, 50
,
54, 55,
57-61,
63-96
N/A Ground GND pins are internally connected each other.
External ground connection affects the RF and
thermal performance of the device.
See section 1.5.1 for functional description.
See section 2.2.1 for external circuit design-in.
V_BCKP All 2 I/O Real Time Clock
supply
input/output
V_BCKP = 2.3 V (typical) on SARA-G3 series.
V_BCKP = 1.8 V (typical) on SARA-U2 series.
V_BCKP is generated by internal low power linear
regulator when valid VCC supply is present.
See section 1.5.2 for functional description.
See section 2.2.2 for external circuit design-in.
V_INT All 4 O Generic Digital
Interfaces supply
output
V_INT = 1.8 V (typical), generated by internal DC/DC
regulator when the module is switched on.
See section 1.5.3 for functional description.
See section 2.2.3 for external circuit design-in.
System PWR_ON All 15 I Power-on input High input impedance: input voltage level has to be
properly fixed, e.g. adding external pull-up.
See section 1.6.1 for functional description.
See section 2.3.1 for external circuit design-in.
RESET_N All 18 I External reset
input
A series Schottky diode is integrated in the module
as protection, and then an internal 10 kΩ pull-up
resistor to V_INT is provided.
See section 1.6.3 for functional description.
See section 2.3.2 for external circuit design-in.
EXT32K SARA-G300
SARA-G310
31 I 32 kHz input Input for RTC reference clock, needed to enter the
low power idle-mode and provide RTC functions.
See section 1.6.4 for functional description.
See section 2.3.3 for external circuit design-in.
32K_OUT SARA-G300
SARA-G310
24 O 32 kHz output 32 kHz output suitable only to feed the EXT32K
input giving the RTC reference clock, allowing low
power idle-mode and RTC functions support.
See section 1.6.5 for functional description.
See section 2.3.3 for external circuit design-in.
Antenna ANT All 56 I/O RF input/output
for antenna
50
Ω
nominal characteristic impedance.
Antenna circuit affects the RF performance and
compliance of the device integrating the module
with applicable required certification schemes.
See section 1.7 for functional description and
requirements for the antenna RF interface.
See section 2.4 for external circuit design-in.
ANT_DET SARA-G340
SARA-G350
SARA-U2
62 I Input for antenna
detection
ADC input for antenna detection function.
See section 1.7.2 for functional description.
See section 2.4.2 for external circuit design-in.
UBX-13000995 - R12 Early Production Information System description
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