SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26
System description
Page 21 of 217
Function
Pin Name
Module
Pin No
I/O
Description
Remarks
I2S_TXD
SARA-G340
SARA-G350
SARA-U2
35
O /
I/O
I
2
S transmit data /
GPIO
1.8 V data output for PCM / normal I
2
S modes.
Pin configurable also as GPIO on SARA-U2 series.
Access by external test-point is recommended.
See section 1.10.2 for functional description.
See section 2.7.2 for external circuit design-in.
I2S_WA
SARA-G340
SARA-G350
SARA-U2
34
O /
I/O
I
2
S word alignment /
GPIO
1.8 V word alignment for PCM / normal I
2
S modes
Pin configurable also as GPIO on SARA-U2 series.
Access by external test-point is recommended.
See section 1.10.2 for functional description.
See section 2.7.2 for external circuit design-in.
CODEC_CLK
SARA-U2
19
O
Clock output
1.8 V master clock output for external audio codec
See section 1.10.2 for functional description.
See section 2.7.2 for external circuit design-in
GPIO
GPIO1
SARA-G340
SARA-G350
SARA-U2
16
I/O
GPIO
1.8 V GPIO by default configured as pin disabled.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO2
SARA-G340
SARA-G350
SARA-U2
23
I/O
GPIO
1.8 V GPIO by default configured to provide the
custom GNSS supply enable function.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO3
SARA-G340
SARA-G350
SARA-U2
24
I/O
GPIO
1.8 V GPIO by default configured to provide the
custom GNSS data ready function.
Access by external test-point is recommended.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
GPIO4
SARA-G340
SARA-G350
SARA-U2
25
I/O
GPIO
1.8 V GPIO by default configured to provide the
custom GNSS RTC sharing function.
See section 1.11 for functional description.
See section 2.8 for external circuit design-in.
Reserved
RSVD
All
33
N/A
RESERVED pin
This pin must be connected to ground.
See section 2.9
RSVD
SARA-G3
17, 19
N/A
RESERVED pin
Leave unconnected.
See section 2.9
RSVD
SARA-G340
SARA-G350
SARA-U2
31
N/A
RESERVED pin
Internally not connected. Leave unconnected.
See section 2.9
RSVD
SARA-G300
SARA-G310
16, 23,
25-27,
34-37
N/A
RESERVED pin
Pin disabled. Leave unconnected.
See section 2.9
RSVD
SARA-G300
SARA-G310
SARA-U2
44-49
N/A
RESERVED pin
Leave unconnected.
See section 2.9
RSVD
SARA-G300
SARA-G310
62
N/A
RESERVED pin
Leave unconnected.
See section 2.9
Table 3: SARA-G3 and SARA-U2 series modules pin definition, grouped by function