SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26 System description
Page 19 of 217
Auxiliary UART
data output
1.8 V output, Circuit 104 (RXD) in ITU-T V.24,
for FW upgrade via EasyFlash tool, AT command
mode
15
, GNSS tunneling
15
and diagnostics.
Access by external test-point is recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
Auxiliary UART
data input
1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for FW upgrade via EasyFlash tool, AT command
mode
15
, GNSS tunneling
15
and diagnostics.
Internal active pull-up to V_INT.
Access by external test-point is recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
Auxiliary UART
data output
Not supported by “00” and “x3” product versions.
1.8 V output, Circuit 104 (RXD) in ITU-T V.24,
for AT command mode and diagnostics.
By default configured as I
2
C bus clock line.
Access by external test-point is recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
Auxiliary UART
data input
Not supported by “00” and “x3” product versions.
1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for AT command mode and diagnostics.
Internal active pull-up to V_INT.
By default configured as I
2
C bus data line.
Access by external test-point is recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
High-Speed USB 2.0 interface input for VBUS (5 V typ)
USB supply sense. USB available for AT, data, GNSS
tunneling, SAP, Ethernet-over-USB
16
, FOAT, FW
upgrade via EasyFlash tool, and diagnostics.
Access by external test-point is recommended.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.
High-Speed USB 2.0 interface data line for AT, data,
GNSS tunneling, SAP, Ethernet-over-USB
16
, FOAT, FW
upgrade via EasyFlash tool, and diagnostics.
90 nominal differential impedance.
Pull-up, pull-down and series resistors as required by
USB 2.0 specifications [14] are part of the USB pin
driver and need not be provided externally.
Access by external test-point is recommended.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.
High-Speed USB 2.0 interface data line for AT, data,
GNSS tunneling, SAP, Ethernet-over-USB
16
, FOAT, FW
upgrade via EasyFlash tool, and diagnostics.
90 nominal differential impedance.
Pull-up, pull-down and series resistors as required by
USB 2.0 specifications [14] are part of the USB pin
driver and need not be provided externally.
Access by external test-point is recommended.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.
15
Supported by product versions “02” onwards
16
Supported by product versions “x3” onwards