u-blox SARA-G3 Series, System Integration Manual

Page: 20 / 218

SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification System description
Page 20 of 218
Function Pin Name Module Pin No I/O Description Remarks
Auxiliary
UART RXD_AUX
All 28 O Auxiliary UART
data output 1.8 V output, Circuit 104 (RXD) in ITU-T
V.24,
for FW upgrade and trace log capture.
Access by external test-point is recommended.
See section
1.9.21.9.2 for functional description.
See section 2.5.22.5.2 for external circuit
design-in.
TXD_AUX All 29 I Auxiliary UART
data input 1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for FW upgrade and trace log capture.
Access by external test-point is recommended.
Internal active pull-up to
V_INT .
See section 1.9.21.9.2 for functional description.
See section 2.5.22.5.2 for external circuit
design-in.
DDC SCL SARA-G350 27 O I
2
C bus clock
line
1.8 V open drain, for the communication with
u-blox positioning modules and chips.
External pull-up required.
See section
1.9.31.9.3 for functional description.
See section 2.5.32.5.3 for external circuit
design-in.
SDA
SARA-G350 26 I/O I
2
C bus data line 1.8 V open drain, for the communication with
u-blox positioning modules and chips.
External pull-up required.
See section
1.9.31.9.3 for functional description.
See section 2.5.32.5.3 for external circuit
design-in.