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 Appendix
Page 148 of 160
Check LISA-U2 series Software Requirements
Not all of the functionalities available with LISA-U1 series modules are supported by all the LISA-U2
series modules versions. These include:
o Analog Audio Interfaces are not supported by all LISA-U2 series modules
o Digital Audio Interfaces are supported by all LISA-U2 series modules versions except LISA-U200-00
o Embedded AssistNow Software, GPS via Modem, Hybrid positioning and CellLocate functionalities
are supported by all LISA-U2 series modules versions except LISA-U200-00
o In-band modem is supported by all LISA-U2 series modules versions except LISA-U200-00
Check section A.2 Software migration.
A.2 Software migration
A.2.1 Software migration from LISA-U1 series to LISA-U2 series wireless modules
Software migration from LISA-U1 series to LISA-U2 series wireless modules is a straightforward procedure.
Nevertheless there are some differences to be considered with firmware version. Like predecessors, LISA-U2
series wireless module supports AT commands according to 3GPP standards: TS 27.007 [5], TS 27.005 [6],
TS 27.010 [7] and the u-blox AT command extension. Backward compatibility has been maintained as far as
possible.
For the complete list of supported AT commands and their syntax see u-blox AT Commands Manual [3].
A.3 Hardware migration
A.3.1 Hardware migration from LISA-U1 series to LISA-U2 series wireless modules
LISA-U2 series wireless modules have been designed with backward compatibility in mind but some minor
differences were unavoidable. These minor differences will however not be relevant for the majority of the
LISA-U1 series designs.
Clean and stable supply is required by LISA-U2 as by LISA-U1 series: low ripple and low voltage drop must be
guaranteed at VCC pins. The voltage provided has to be within the normal operating range limits to allow
module switch-on and has to be above the minimum limit of the extended operating range to avoid module
switch-off. Consider that there are large current spikes in connected mode, when a GSM call is enabled.
LISA-U2 series provide wider VCC input voltage range compared to LISA-U1 series.
The ANT pin has 50 Ω nominal characteristic impedance and must be connected to the antenna through a 50 Ω
transmission line to allow transmission and reception of radio frequency (RF) signals in the 2G and 3G operating
bands. The recommendations of the antenna producer for correct installation and deployment (PCB layout and
matching circuitry) must be followed.
The antenna and the whole RF circuit must provide optimal radiating characteristics on the entire supported
bands: note that LISA-U2 supports different 3G bands in comparison to LISA-U1 series wireless modules.
LISA-U230 modules provide the RF antenna input for Rx diversity on the pin 74 (named ANT_DIV): it has an
impedance of 50 Ω. The same pad is a reserved pin on LISA-U1 series and LISA-U200 modules.
Analog audio interfaces are not supported by LISA-U2 series modules, but a second 4-wire I
2
S digital audio
interface is provided instead of the 4 analog audio pins on all LISA-U2 series modules versions except
LISA-U200-00. The same 4 pins can be configured as GPIO on all LISA-U2 series modules versions.