User's Manual

LISA-U1/LISA-H1 series - System Integration Manual
3G.G2-HW-10002-2 Advance Information System description
Page 42 of 116
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: GPS tunneling
AT+IPR=115200
Baud rate: 115200 b/s
AT+ICF=0,0
Frame format: 8 bits, no parity, 1 stop bit
AT&K3
HW flow control enabled
AT&S1
DSR line set ON in data mode and set OFF in command mode
AT&D1
Upon an ON-to-OFF transition of DTR, the DCE enters online command state and issues
an OK result code
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 dedicated port
 USB5: 2G trace dedicated port
 USB6: 3G trace dedicated port
AT&K3
HW flow control enabled
AT&S1
DSR line set ON in data mode and set OFF in command mode
AT&D1
Upon an ON-to-OFF transition of DTR, the DCE enters online command state and issues
an OK result code
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: GPS tunneling
AT&K3
HW flow control enabled
AT&S1
DSR line set ON in data mode and set OFF in command mode
AT&D1
Upon an ON-to-OFF transition of DTR, the DCE enters online command state and issues
an OK result code
AT&C1
Circuit 109 changes in accordance with the Carrier detect status; ON if the Carrier is
detected, OFF otherwise
Table 17: Default serial interfaces configuration
1.9.2 Asynchronous serial interface (UART)
The UART interface is a 9-wire unbalanced asynchronous serial interface that provides AT commands interface,
PSD and CSD data communication, firmware upgrade.
UART interface provides RS-232 functionality conforming to the ITU-T V.24 Recommendation (more details
available in ITU Recommendation [3]), with CMOS compatible signal levels: 0 V for low data bit or ON state, and
1.8 V for high data bit or OFF state. Two different external voltage translators (Maxim MAX3237E and On
Semiconductor NLSX3018MUTAG) could be used to provide full RS-232 (9 lines) compatible signal levels. The On
Semiconductor chip provides the translation from 1.8 V to 3.3 V, while the Maxim chip provides the necessary
RS-232 compatible signal towards the external connector. If a UART interface with only 5 lines is needed, the
Maxim 13234E voltage level translator can be used. This chip translates the voltage levels from 1.8 V (module
side) to the RS-232 standard. For detailed electrical characteristics refer to the LISA-U1/LISA-H1 series Data Sheet
[1].
The LISA-U1/LISA-H1 series modules are designed to operate as an HSPA wireless modem, which represents the
data circuit-terminating equipment (DCE) as described by the ITU-T V.24 Recommendation [3]. A customer
application processor connected to the module through the UART interface represents the data terminal
equipment (DTE).