SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26 Appendix
Page 210 of 217
1.8 V GPIO / Reserved
Default: GNSS RTC sharing
Driver strength: 6 mA
Internal pull-down: ~35 k
1.8 V GPIO
Default: GNSS RTC sharing
Driver strength: 6 mA
Internal pull-down: ~9 k
I
2
C Data I/O / Reserved
1.8 V, open drain
Driver strength: 3 mA
I
2
S Data I/O
1.8 V, open drain
Driver strength: 1 mA
No functional difference
Settable as Auxiliary UART on
SARA-U2 ‘04’ onwards
I
2
C Clock Output / Reserved
1.8 V, open drain
Driver strength: 3 mA
I
2
C Clock Output
1.8 V, open drain
Driver strength: 1 mA
No functional difference
Settable as Auxiliary UART on
SARA-U2 ‘04’ onwards
Aux UART Data Out
1.8 V, Driver strength: 5 mA
USB Data I/O (D-)
High-Speed USB 2.0
USB instead of Auxiliary
UART
Aux UART Data In
1.8 V, Internal pull-up:~18 k
USB Data I/O (D+)
High-Speed USB 2.0
USB instead of Auxiliary
UART
I
2
S Word Alignment / Reserved
1.8 V, Driver strength: 6 mA
I
2
S Word Alignment
1.8 V, Driver strength: 2 mA
I
2
S Data Output / Reserved
1.8 V, Driver strength: 5 mA
I
2
S Data Output
1.8 V, Driver strength: 2 mA
I
2
S Clock / Reserved
1.8 V, Driver strength: 5 mA
I
2
S Clock
1.8 V, Driver strength: 2 mA
I
2
S Data Input / Reserved
1.8 V, Internal pull-down:~18 k
I
2
S Data Input
1.8 V, Inner pull-down: ~9 k
SIM Detection Input
1.8 V, Internal pull-down:~18 k
SIM Detection Input
1.8 V, Inner pull-down: ~9 k
Analog Audio Out (+) / Reserved
Analog audio not supported
Analog Audio Out (-) / Reserved
Analog audio not supported
Microphone Supply Out / Reserved
Analog audio not supported
Microphone Ground / Reserved
Analog audio not supported
Analog Audio In (-) / Reserved
Analog audio not supported
Analog Audio In (+) / Reserved
Analog audio not supported
Module Supply Input
Normal op. range:
3.35 V – 4.5 V
Extended op. range:
3.00 V – 4.5 V
Module Supply Input
Normal op. range:
3.3 V – 4.4 V
Extended op. range:
3.1 V – 4.5 V
RF Antenna I/O
ESD immunity (IEC 61000-4-2):
±4 kV contact / ±8 kV air ESD
RF Antenna I/O
ESD immunity (IEC 61000-4-2):
±2 kV contact / ±4 kV air ESD
(except for SARA-U201)
±4 kV contact / ±8 kV air ESD for
SARA-U201
Antenna Detection Input / Reserved
Table 70: SARA-G3 and SARA-U2 pin assignment with remarks for migration
For the detailed functional description of each interface of SARA-G3 and SARA-U2 series modules see the
related section in the chapter 1; for detailed design-in see the related section in the chapter 2. See the SARA-G3
series Data Sheet [1] and the SARA-U2 series Data Sheet [2] for electrical characteristics of each interface.