Integration Manual
Table Of Contents
- Preface
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Power management
- 1.6 System functions
- 1.7 RF connection
- 1.8 (U)SIM interface
- 1.9 Serial communication
- 1.10 DDC (I2C) interface
- 1.11 Audio Interface
- 1.12 General Purpose Input/Output (GPIO)
- 1.13 Reserved pins (RSVD)
- 1.14 Schematic for LISA-U series module integration
- 1.15 Approvals
- 2 Design-In
- 2.1 Design-in checklist
- 2.2 Design Guidelines for Layout
- 2.2.1 Layout guidelines per pin function
- 2.2.2 Footprint and paste mask
- 2.2.3 Placement
- 2.3 Thermal aspects
- 2.4 Antenna guidelines
- 2.5 ESD precautions
- 3 Features description
- 4 Handling and soldering
- 5 Product Testing
- Appendix
- A Migration to LISA-U2 series wireless modules
- B Glossary
- Related documents
- Revision history
- Contact
LISA-U series - System Integration Manual
3G.G2-HW-10002-A3 Preliminary System description
Page 47 of 160
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
All LISA-U2 series modules versions except LISA-U200-00 provide an additional channel:
Channel 7: SIM Access Profile dedicated port
AT+IPR=115200
Baud rate: 115200 b/s
AT+ICF=3,1
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 and BB trace dedicated port
USB6: 3G trace dedicated port
All LISA-U2 series modules versions except LISA-U200-00 provide an additional CDC:
USB7: SIM Access Profile 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
All LISA-U2 series modules versions except LISA-U200-00 provide an additional channel:
Channel 7: SIM Access Profile 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
Table 22: 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 [4]), 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 (e.g. Maxim MAX3237E and Texas
Instruments SN74AVC8T245PW) could be used to provide full RS-232 (9 lines) compatible signal levels. The
Texas Instruments 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