Installation Instructions

LISA-U2 series - System Integration Manual
UBX-13001118 - R19 Early Production Information System description
Page 53 of 175
1.9.1 Serial interfaces configuration
UART, USB and SPI/IPC serial interfaces are available as AT command interface and for Packet-Switched / Circuit-
Switched Data communication. The serial interfaces are configured as described in Table 26 (for information
about further settings, see the u-blox AT Commands Manual [2]).
Interface
AT Settings
Comments
UART interface
Enabled
Multiplexing mode can be enabled by AT+CMUX command providing following channels:
 Channel 0: control channel
 Channel 1 – 5: AT commands / data connection
 Channel 6: GNSS tunneling
 Channel 7: SAP (SIM Access Profile)
AT+IPR=0
One-shot autobauding enabled by default
AT+ICF=0
One-shot frame format recognition enabled by default
AT&K3
HW flow control enabled
AT&S1
DSR line set ON in data mode and set OFF in command mode
5
AT&D1
Upon an ON-to-OFF transition of DTR, the DCE enters online command mode and issues an OK
result code
5
AT&C1
Circuit 109 changes in accordance with the Carrier detect status; ON if the Carrier is detected,
OFF otherwise
USB interface
Enabled
6 CDCs are available, configured as described in the following list:
 USB1: AT commands / data connection
 USB2: AT commands / data connection
 USB3: AT commands / data connection
 USB4: GPS tunneling
 USB5: Primary TraceLog
 USB6: Secondary TraceLog
 USB7: SAP (SIM Access Profile)
AT&K3
HW flow control enabled
AT&S1
DSR line set ON in data mode and set OFF in command mode
5
AT&D1
Upon an ON-to-OFF transition of DTR, the DCE enters online command mode and issues an OK
result code
5
AT&C1
Circuit 109 changes in accordance with the Carrier detect status; ON if the Carrier is detected,
OFF otherwise
SPI interface
Enabled
Multiplexing mode can be enabled by AT+CMUX command providing following channels:
 Channel 0: control channel
 Channel 1 – 5: AT commands / data connection
 Channel 6: GNSS tunneling
 Channel 7: SAP (SIM Access Profile)
AT&K3
HW flow control enabled
AT&S1
DSR line set ON in data mode and set OFF in command mode
5
AT&D1
Upon an ON-to-OFF transition of DTR, the DCE enters online command mode and issues an OK
result code
5
AT&C1
Circuit 109 changes in accordance with the Carrier detect status; ON if the Carrier is detected,
OFF otherwise
Table 26: Default serial interfaces configuration
5
Refer to the u-blox AT Commands Manual [2] for the definition of the interface data mode, command mode and online command mode.