User's 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 Supply interfaces
- 1.6 System function interfaces
- 1.7 Antenna interface
- 1.8 SIM interface
- 1.9 Serial interfaces
- 1.9.1 Asynchronous serial interface (UART)
- 1.9.1.1 UART features
- 1.9.1.2 UART AT interface configuration
- 1.9.1.3 UART signal behavior
- 1.9.1.4 UART and power-saving
- AT+UPSV=0: power saving disabled, fixed active-mode
- AT+UPSV=1: power saving enabled, cyclic idle/active-mode
- AT+UPSV=2: power saving enabled and controlled by the RTS line
- AT+UPSV=3: power saving enabled and controlled by the DTR line
- Wake up via data reception
- Additional considerations for SARA-U2 modules
- 1.9.1.5 Multiplexer protocol (3GPP 27.010)
- 1.9.2 Auxiliary asynchronous serial interface (UART AUX)
- 1.9.3 USB interface
- 1.9.4 DDC (I2C) interface
- 1.9.1 Asynchronous serial interface (UART)
- 1.10 Audio interface
- 1.11 General Purpose Input/Output (GPIO)
- 1.12 Reserved pins (RSVD)
- 1.13 System features
- 1.13.1 Network indication
- 1.13.2 Antenna detection
- 1.13.3 Jamming detection
- 1.13.4 TCP/IP and UDP/IP
- 1.13.5 FTP
- 1.13.6 HTTP
- 1.13.7 SMTP
- 1.13.8 SSL
- 1.13.9 Dual stack IPv4/IPv6
- 1.13.10 Smart temperature management
- 1.13.11 AssistNow clients and GNSS integration
- 1.13.12 Hybrid positioning and CellLocateTM
- 1.13.13 Firmware upgrade Over AT (FOAT)
- 1.13.14 Firmware upgrade Over The Air (FOTA)
- 1.13.15 In-Band modem (eCall / ERA-GLONASS)
- 1.13.16 SIM Access Profile (SAP)
- 1.13.17 Power saving
- 2 Design-in
- 2.1 Overview
- 2.2 Supply interfaces
- 2.2.1 Module supply (VCC)
- 2.2.1.1 General guidelines for VCC supply circuit selection and design
- 2.2.1.2 Guidelines for VCC supply circuit design using a switching regulator
- 2.2.1.3 Guidelines for VCC supply circuit design using a Low Drop-Out (LDO) linear regulator
- 2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable Li-Ion or Li-Pol battery
- 2.2.1.5 Guidelines for VCC supply circuit design using a primary (disposable) battery
- 2.2.1.6 Additional guidelines for VCC supply circuit design
- 2.2.1.7 Guidelines for external battery charging circuit
- 2.2.1.8 Guidelines for external battery charging and power path management circuit
- 2.2.1.9 Guidelines for VCC supply layout design
- 2.2.1.10 Guidelines for grounding layout design
- 2.2.2 RTC supply (V_BCKP)
- 2.2.3 Interface supply (V_INT)
- 2.2.1 Module supply (VCC)
- 2.3 System functions interfaces
- 2.4 Antenna interface
- 2.5 SIM interface
- 2.6 Serial interfaces
- 2.6.1 Asynchronous serial interface (UART)
- 2.6.1.1 Guidelines for UART circuit design
- 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
- 2.6.1.2 Guidelines for UART layout design
- 2.6.1.1 Guidelines for UART circuit design
- 2.6.2 Auxiliary asynchronous serial interface (UART AUX)
- 2.6.3 Universal Serial Bus (USB)
- 2.6.4 DDC (I2C) interface
- 2.6.1 Asynchronous serial interface (UART)
- 2.7 Audio interface
- 2.7.1 Analog audio interface
- 2.7.1.1 Guidelines for microphone and speaker connection circuit design (headset / handset modes)
- 2.7.1.2 Guidelines for microphone and loudspeaker connection circuit design (hands-free mode)
- 2.7.1.3 Guidelines for external analog audio device connection circuit design
- 2.7.1.4 Guidelines for analog audio layout design
- 2.7.2 Digital audio interface
- 2.7.1 Analog audio interface
- 2.8 General Purpose Input/Output (GPIO)
- 2.9 Reserved pins (RSVD)
- 2.10 Module placement
- 2.11 Module footprint and paste mask
- 2.12 Thermal guidelines
- 2.13 ESD guidelines
- 2.14 SARA-G350 ATEX integration in explosive atmospheres applications
- 2.15 Schematic for SARA-G3 and SARA-U2 series module integration
- 2.16 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 5 Product testing
- Appendix
- A Migration between LISA and SARA-G3 modules
- A.1 Overview
- A.2 Checklist for migration
- A.3 Software migration
- A.4 Hardware migration
- B Migration between SARA-G3 and SARA-U2
- C Glossary
- Related documents
- Revision history
- Contact
SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R08 Objective Specification Appendix
Page 173 of 188
A.4.4 SIM interface
SIM interface
The same compatible external circuit can be implemented for SARA and LISA modules: 1.8 V and 3.0 V SIM are
supported. LISA-C2 modules do not need an external SIM for Sprint and Verizon mobile operators. LISA-C2
series SIM interface is hardware ready but the support of external SIM card / IC will be provided by the upcoming
firmware releases.
SIM detection interface
The same compatible external circuit can be implemented for SARA and LISA modules: SIM detection function is
provided by the SIM_DET pin on SARA-G3 modules and by the GPIO5 pin on LISA-U modules. SIM card hot
insertion/removal is additionally supported by all LISA-U2 series except LISA-U200-00S.
LISA-C2 modules do not support SIM detection.
A.4.5 Serial interfaces
UART interface
The same compatible external circuit can be implemented for SARA and LISA modules: a 1.8 V unbalanced
asynchronous serial port with RS-232 functionality is provided on SARA-G3 modules (for AT command, data
communication, MUX functionality, FW upgrade over AT), LISA-C2 modules (for AT command, data
communication, MUX functionality), LISA-U modules (for AT command, data communication, MUX functionality,
FW upgrade over AT or using the u-blox EasyFlash tool).
LISA-C2 modules do not support DSR, DCD and DTR functions.
Table 51 and the module’s datasheet [1], [4], [5], [6] report minor differences in the internal pull-ups and drivers
strengths.
These are the default settings of the UART interfaces:
SARA-G3 modules: automatic baud rate and frame format detection
LISA-U2 except LISA-U200-00S modules: one-shot automatic baud rate and frame format detection
LISA-C2, LISA-U1 and LISA-U200-00S modules: 115200 b/s baud rate and 8N1 frame format
For further details regarding UART interface settings see the module’s datasheet [1], [4], [5], [6] and to the
related AT commands manual of the module [3], [9].
UART AUX interface
Only the SARA-G3 modules provide an auxiliary UART interface for FW upgrade using the u-blox EasyFlash tool
and for diagnostic purpose.
LISA modules do not provide an auxiliary UART interface.
USB interface
SARA-G3 modules do not provide a USB interface such as is available on LISA-U modules (High-Speed USB 2.0
for AT command, data communication, FW upgrade over AT or using the u-blox EasyFlash tool, and for Trace
log capture) and on LISA-C2 modules (Full-Speed USB 2.0 for AT command, Data communication, FW upgrade).
SPI interface
SARA-G3 and LISA-C2 modules do not provide an SPI interface such as is available on LISA-U modules (5-wire
IPC interface for AT command, data communication, MUX functionality, FW upgrade over AT).
DDC (I
2
C) interface
The same compatible external circuit can be implemented for SARA-G340 / SARA-G350 and LISA series: A 1.8 V
DDC (I
2
C bus compatible) interface is provided to communicate with u-blox GNSS receivers.