Integration Manual
Table Of Contents
- Document Information
- 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
- 1.9.1 Serial interfaces configuration
- 1.9.2 Asynchronous serial interface (UART)
- 1.9.2.1 UART features
- 1.9.2.2 UART signal behavior
- 1.9.2.3 UART and power-saving
- 1.9.2.4 UART application circuits
- Providing the full RS-232 functionality (using the complete V.24 link)
- Providing the TxD, RxD, RTS, CTS and DTR lines only (not using the complete V.24 link)
- Providing the TxD, RxD, RTS and CTS lines only (not using the complete V.24 link)
- Providing the TxD and RxD lines only (not using the complete V24 link)
- Additional considerations
- 1.9.3 USB interface
- 1.9.4 SPI interface
- 1.9.5 MUX protocol (3GPP TS 27.010)
- 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-U2 module integration
- 1.15 Approvals
- 1.15.1 European Conformance CE mark
- 1.15.2 US Federal Communications Commission notice
- 1.15.3 Innovation, Science, Economic Development Canada notice
- 1.15.4 Australian Regulatory Compliance Mark
- 1.15.5 ICASA Certification
- 1.15.6 KCC Certification
- 1.15.7 ANATEL Certification
- 1.15.8 CCC Certification
- 1.15.9 Giteki Certification
- 2 Design-In
- 3 Features description
- 3.1 Network indication
- 3.2 Antenna detection
- 3.3 Jamming Detection
- 3.4 TCP/IP and UDP/IP
- 3.5 FTP
- 3.6 HTTP
- 3.7 SSL/TLS
- 3.8 Dual stack IPv4/IPv6
- 3.9 AssistNow clients and GNSS integration
- 3.10 Hybrid positioning and CellLocate®
- 3.11 Control Plane Aiding / Location Services (LCS)
- 3.12 Firmware update Over AT (FOAT)
- 3.13 Firmware update Over the Air (FOTA)
- 3.14 In-Band modem (eCall / ERA-GLONASS)
- 3.15 SIM Access Profile (SAP)
- 3.16 Smart Temperature Management
- 3.17 Bearer Independent Protocol
- 3.18 Multi-Level Precedence and Pre-emption Service
- 3.19 Network Friendly Mode
- 3.20 Power saving
- 4 Handling and soldering
- 5 Product Testing
- Appendix
- A Migration from LISA-U1 to LISA-U2 series
- A.1 Checklist for migration
- A.2 Software migration
- A.2.1 Software migration from LISA-U1 series to LISA-U2 series modules
- A.3 Hardware migration
- A.3.1 Hardware migration from LISA-U1 series to LISA-U2 series modules
- A.3.2 Pin-out comparison LISA-U1 series vs. LISA-U2 series
- A.3.3 Layout comparison LISA-U1 series vs. LISA-U2 series
- B Glossary
- Related documents
- Revision history
- Contact
LISA-U2 series - System Integration Manual
UBX-13001118 - R25 System description Page 19 of 182
☞ LISA-U2 series modules switch off when the VCC voltage value drops below the specified extended
operating range minimum limit: ensure that the input voltage at the VCC pins never drops below
the minimum limit of the extended operating range when the module is switched on, not even
during a GSM transmit burst, where the current consumption can rise up to maximum peaks of
2.5 A in case of a mismatched antenna load.
⚠ Operation above the normal operating range maximum limit is not recommended and extended
exposure beyond it may affect device reliability.
⚠ Stress beyond the VCC absolute maximum ratings can cause permanent damage to the module:
if necessary, voltage spikes beyond the VCC absolute maximum ratings must be restricted to
values within the specified limits by using appropriate protection.
☞ When designing the power supply for the application, pay specific attention to power losses and
transients. The DC power supply must be able to provide a voltage profile to the VCC pins with the
following characteristics:
o Voltage drop during transmit slots must be lower than 400 mV
o No undershoot or overshoot at the start and at the end of transmit slots
o Voltage ripple during transmit slots must be minimized:
less than 70 mVpp if f
ripple
≤ 200 kHz
less than 10 mVpp if 200 kHz < f
ripple
≤ 400 kHz
less than 2 mVpp if f
ripple
> 400 kHz
Time
undershoot
overshoot
ripple
ripple
drop
Voltage
3.8 V
(typ)
RX
slot
unused
slot
unused
slot
TX
slot
unused
slot
unused
slot
MON
slot
unused
slot
RX
slot
unused
slot
unused
slot
TX
slot
unused
slot
unused
slot
MON
slot
unused
slot
GSM frame
4.615 ms
(1 frame = 8 slots)
GSM frame
4.615 ms
(1 frame = 8 slots)
Figure 4: Description of the VCC voltage profile versus time during a GSM call
☞ Any degradation in power supply performance (due to losses, noise or transients) will directly
affect the RF performance of the module since the single external DC power source indirectly
supplies all the digital and analog interfaces, and also directly supplies the RF power amplifier (PA).
☞ The voltage at the VCC pins must ramp from 2.5 V to 3.2 V within 1 ms. This VCC slope allows a
proper switch-on of the module when the voltage rises to the VCC normal operating range from a
voltage of less than 2.25 V. If the external supply circuit cannot raise the VCC voltage from 2.5 V
to 3.2 V within 1 ms, the RESET_N pin should be kept low during VCC rising edge, so that the
module will switch on releasing the RESET_N pin when the VCC voltage stabilizes at its nominal
value within the normal operating range.