u-blox SARA-G3 Series - Page 20

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.