User's Manual

SARA-R4 series - System Integration Manual
UBX-16029218 - R03 System description
Page 11 of 94
Function
Pin Name
Pin No
I/O
Description
Remarks
DDC
SCL
27
O
I
2
C bus clock line
1.8 V open drain, for communication with I2C-slave devices.
Internal pull-up to V_INT: external pull-up is not required.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.
SDA
26
I/O
I
2
C bus data line
1.8 V open drain, for communication with I2C-slave devices.
Internal pull-up to V_INT: external pull-up is not required.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.
GPIO
GPIO1
16
I/O
GPIO
1.8 V GPIO with alternatively configurable functions.
See section 1.10 for functional description.
See section 2.7 for external circuit design-in.
GPIO2
23
I/O
GPIO
1.8 V GPIO with alternatively configurable functions.
See section 1.10 for functional description.
See section 2.7 for external circuit design-in.
GPIO3
24
I/O
GPIO
1.8 V GPIO with alternatively configurable functions.
See section 1.10 for functional description.
See section 2.7 for external circuit design-in.
GPIO4
25
I/O
GPIO
1.8 V GPIO with alternatively configurable functions.
See section 1.10 for functional description.
See section 2.7 for external circuit design-in.
GPIO5
42
I/O
GPIO
1.8 V GPIO with alternatively configurable functions.
See section 1.10 for functional description.
See section 2.7 for external circuit design-in.
GPIO6
19
I/O
GPIO
1.8 V GPIO with alternatively configurable functions.
See section 1.10 for functional description.
See section 2.7 for external circuit design-in.
Reserved
RSVD
33
N/A
Reserved pin
This pin can be connected to GND.
See sections 1.11 and 2.8
RSVD
2, 31, 34-37,
44-49
N/A
Reserved pin
Leave unconnected.
See sections 1.11 and 2.8
Table 3: SARA-R4 series module pin definition, grouped by function