u-blox SARA-G3 Series, SARA-G310, SARA-G350, SARA-G350 ATEX, SARA-G300 System Integration Manual

Abstract

This document describes the features and the system integration of SARA-G3 series GSM/GPRS wireless modules.

These modules are complete and cost efficient solutions offering up to quad-band GSM/GPRS voice and/or data transmission technology in a compact form factor.

www.u-blox.com

26.0 x 16.0 x 3.0 mm

UBX-13000995 - R06

SARA-G3 series

GSM/GPRS modules

System Integration Manual

SARA-G3 series - System Integration Manual

Document Information

Title

SARA-G3 series

Subtitle

GSM/GPRS modules

Document type

System Integration Manual

Document number

UBX-13000995

Revision, date

R06

29-Nov-2013

Document status

Objective Specification

Document status information

Objective Specification

This document contains target values. Revised and supplementary data will be published later.

Advance Information

This document contains data based on early testing. Revised and supplementary data will be published later.

Early Production Information

This document contains data from product verification. Revised and supplementary data may be published later.

Production Information

This document contains the final product specification.

Name

Type number

Firmware version

PCN / IN

SARA-G300

SARA-G300-00S-00

08.58

GSM.G2-TN-13007

SARA-G310

SARA-G310-00S-00

08.58

GSM.G2-TN-13007

SARA-G350

SARA-G350-00S-00

08.49

GSM.G2-TN-13002

SARA-G350 ATEX

SARA-G350-00X-00

08.49

GSM.G2-TN-13002

This document applies to the following products:

UBX-13000995 - R06

Page 2 of 218

This document and the use of any information contained therein, is subject to the acceptance of the u-blox terms and conditions. They can be downloaded from www.u-blox.com. u-blox makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. u-blox reserves all rights to this document and the information contained herein. Reproduction, use or disclosure to third parties without express permission is strictly prohibited. Copyright © 2013, u-blox AG. u-blox® is a registered trademark of u-blox Holding AG in the EU and other countries.

Trademark Notice

Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. All other registered trademarks or trademarks mentioned in this document are property of their respective owners.

UBX-13000995 Objective Specification Page 3

SARA-G3 series - System Integration Manual

Preface

u-blox Technical Documentation

As part of our commitment to customer support, u-blox maintains an extensive volume of technical documentation for our products. In addition to our product-specific technical data sheets, the following manuals are available to assist u-blox customers in product design and development.

AT Commands Manual: This document provides the description of the supported AT commands by the

SARA-G3 series modules to verify all implemented functionalities.

System Integration Manual: This manual provides hardware design instructions and information on how to

set up production and final product tests.

Application Note: document provides general design instructions and information that applies to all u-blox

Wireless modules. See Related documents section for a list of Application Notes related to your Wireless Module.

How to use this Manual

The SARA-G3 series System Integration Manual provides the necessary information to successfully design in and configure these u-blox wireless modules.

This manual has a modular structure. It is not necessary to read it from the beginning to the end. The following symbols are used to highlight important information within the manual:

An index finger points out key information pertaining to module integration and performance.

A warning symbol indicates actions that could negatively impact or damage the module.

Questions

If you have any questions about u-blox Wireless Integration:

 Read this manual carefully.  Contact our information service on the homepage http://www.u-blox.com  Read the questions and answers on our FAQ database on the homepage http://www.u-blox.com

Technical Support

Worldwide Web

Our website (www.u-blox.com) is a rich pool of information. Product information, technical documents and helpful FAQ can be accessed 24h a day.

By E-mail

Contact the nearest of the Technical Support offices by email. Use our service pool email addresses rather than any personal email address of our staff. This makes sure that your request is processed as soon as possible. You will find the contact details at the end of the document.

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SARA-G3 series - System Integration Manual

Helpful Information when Contacting Technical Support

When contacting Technical Support, have the following information ready:

 Module type (e.g. SARA-G350) and firmware version  Module configuration  Clear description of your question or the problem  A short description of the application  Your complete contact details

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Contents

Preface ...................................................................................................................................... 4

Contents .................................................................................................................................. 65

1 System description .......................................................................................................... 109

1.1 Overview ................................................................................................................... 109

1.2 Architecture .............................................................................................................. 1311

1.2.1 Internal blocks..................................................................................................... 1512

1.3 Pin-out ................................................................................................................... 1713

1.4 Operating modes ...................................................................................................... 2317

1.5 Supply interfaces ...................................................................................................... 2619

1.5.1 Module supply input (VCC) ................................................................................ 2619

1.5.2 RTC supply input/output (V_BCKP)...................................................................... 3526

1.5.3 Interfaces supply output (V_INT) .......................................................................... 3627

1.6 System function interfaces .......................................................................................... 3728

1.6.1 Module power-on ............................................................................................... 3728

1.6.2 Module power-off ............................................................................................... 3829

1.6.3 Module reset ..................................................................................................... 3930

1.6.4 External 32 kHz signal input (EXT32K) ................................................................ 4031

1.6.5 Internal 32 kHz signal output (32K_OUT) .............................................................. 4131

1.7 Antenna interface ...................................................................................................... 4232

1.7.1 Antenna RF interface (ANT) ............................................................................... 4232

1.7.2 Antenna detection interface (ANT_DET) ................................................................. 4433

1.8 SIM interface ........................................................................................................... 4433

1.8.1 (U)SIM card interface ........................................................................................ 4433

1.8.2 SIM card detection interface (SIM_DET) ................................................................ 4433

1.9 Serial interfaces........................................................................................................ 4634

1.9.1 Asynchronous serial interface (UART).................................................................... 4634

1.9.2 Auxiliary asynchronous serial interface (UART AUX) ................................................. 6244

1.9.3 DDC (I2C) interface .......................................................................................... 6244

1.10 Audio interface ...................................................................................................... 6446

1.10.1 Analog audio interface ......................................................................................... 6446

1.10.2 Digital audio interface .......................................................................................... 6748

1.10.3 Voice-band processing system .............................................................................. 6949

1.11 General Purpose Input/Output (GPIO) ...................................................................... 7151

1.12 Reserved pins (RSVD) ......................................................................................... 7453

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1.13 System features .................................................................................................... 7554

1.13.1 Network indication ............................................................................................... 7554

1.13.2 Antenna detection ............................................................................................... 7554

1.13.3 Jamming detection .............................................................................................. 7554

1.13.4 TCP/IP and UDP/IP .......................................................................................... 7755

1.13.5 FTP ................................................................................................................. 7755

1.13.6 HTTP ............................................................................................................... 7755

1.13.7 SMTP .............................................................................................................. 7755

1.13.8 Smart temperature management ............................................................................. 7956

1.13.9 AssistNow clients and GNSS integration .................................................................. 8258

1.13.10 Hybrid positioning and CellLocateTM ..................................................................... 8459

1.13.11 Firmware upgrade Over AT (FOAT) .................................................................. 8661

1.13.12 Firmware upgrade Over The Air (FOTA) ............................................................ 8761

1.13.13 In-Band modem (eCall / ERA-GLONASS) ........................................................ 8862

1.13.14 Power saving .................................................................................................. 8862

2 Design-in ...................................................................................................................... 9063

2.1 Supply interfaces ...................................................................................................... 9164

2.1.1 Module supply (VCC) ........................................................................................ 9164

2.1.2 RTC supply (V_BCKP) ..................................................................................... 10072

2.1.3 Interface supply (V_INT) ................................................................................... 10374

2.2 System functions interfaces ........................................................................................ 10575

2.2.1 Module power-on (PWR_ON)............................................................................. 10575

2.2.2 Module reset (RESET_N) .................................................................................. 10776

2.2.3 32 kHz signal (EXT32K and 32K_OUT) .............................................................. 10977

2.3 Antenna interface ...................................................................................................... 11179

2.3.1 Antenna RF interface (ANT) ............................................................................... 11179

2.3.2 Antenna detection interface (ANT_DET) ................................................................ 11784

2.4 SIM interface .......................................................................................................... 12087

2.5 Serial interfaces....................................................................................................... 12994

2.5.1 Asynchronous serial interface (UART)................................................................... 12994

2.5.2 Auxiliary asynchronous serial interface (UART AUX) ................................................ 13397

2.5.3 DDC (I2C) interface ......................................................................................... 13599

2.6 Audio Interface ....................................................................................................... 139102

2.6.1 Analog Audio interface ....................................................................................... 139102

2.6.2 Digital Audio interface ........................................................................................ 147108

2.7 General Purpose Input/Output (GPIO) ...................................................................... 149109

2.8 Reserved pins (RSVD) ........................................................................................... 151111

2.9 Module placement .................................................................................................... 151111

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2.10 Module footprint and paste mask ............................................................................ 152112

2.11 Thermal guidelines ............................................................................................... 154113

2.12 ESD guidelines ................................................................................................... 156115

2.12.1 ESD immunity test overview ............................................................................... 156115

2.12.2 ESD immunity test of u-blox SARA-G3 series reference designs .............................. 156115

2.12.3 ESD application circuits ...................................................................................... 157116

2.13 SARA-G350 ATEX integration in explosive atmospheres applications.............................. 160118

2.13.1 General guidelines ............................................................................................ 160118

2.13.2 Guidelines for VCC supply circuit design ................................................................161119

2.13.3 Guidelines for antenna RF interface design ............................................................ 163120

2.14 Schematic for SARA-G3 series module integration ..................................................... 164121

2.15 Design-in checklist .............................................................................................. 168123

2.15.1 Schematic checklist ........................................................................................... 168123

2.15.2 Layout checklist ................................................................................................ 170124

2.15.3 Antenna checklist .............................................................................................. 170124

3 Handling and soldering ............................................................................................. 171125

3.1 Packaging, shipping, storage and moisture preconditioning ............................................... 171125

3.2 Soldering .............................................................................................................. 171125

3.2.1 Soldering paste ................................................................................................ 171125

3.2.2 Reflow soldering ............................................................................................... 171125

3.2.3 Optical inspection .............................................................................................. 174127

3.2.4 Cleaning ......................................................................................................... 174127

3.2.5 Repeated reflow soldering ................................................................................... 174127

3.2.6 Wave soldering ................................................................................................ 174127

3.2.7 Hand soldering ................................................................................................. 174127

3.2.8 Rework ........................................................................................................... 174127

3.2.9 Conformal coating ............................................................................................. 175127

3.2.10 Casting ........................................................................................................... 176128

3.2.11 Grounding metal covers ..................................................................................... 176128

3.2.12 Use of ultrasonic processes ................................................................................ 176128

4 Approvals .................................................................................................................. 177129

4.1 Product certification approval overview ......................................................................... 177129

4.2 Federal Communications Commission and Industry Canada notice ..................................... 179130

4.2.1 Safety Warnings review the structure .................................................................... 179130

4.2.2 Declaration of Conformity – United States only ....................................................... 179130

4.2.3 Modifications .................................................................................................... 179130

4.3 R&TTED and European Conformance CE mark ............................................................ 181132

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4.4 Anatel certification ................................................................................................... 182132

4.5 SARA-G350 ATEX conformance for use in explosive atmospheres................................... 183134

5 Product Testing ......................................................................................................... 184135

5.1 u-blox in-series production test ................................................................................ 184135

5.2 Test parameters for OEM manufacturer ....................................................................... 184135

5.2.1 “Go/No go” tests for integrated devices .............................................................. 185136

5.2.2 Functional tests providing RF operation ................................................................. 185136

Appendix ......................................................................................................................... 188139

A Migration between LISA and SARA-G3 modules...................................................... 188139

A.1 Overview ............................................................................................................... 188139

A.2 Checklist for migration ............................................................................................. 189140

A.3 Software migration ...................................................................................................191141

A.4 Hardware migration ..................................................................................................191141

A.4.1 Supply interfaces ...............................................................................................191141

A.4.2 System functions interfaces ................................................................................. 193142

A.4.3 Antenna interface .............................................................................................. 195143

A.4.4 SIM interface ................................................................................................... 197144

A.4.5 Serial interfaces ................................................................................................ 197144

A.4.6 Audio interfaces ................................................................................................ 198145

A.4.7 GPIO pins ...................................................................................................... 199145

A.4.8 Reserved pins .................................................................................................. 199145

A.4.9 Pin-out comparison between LISA and SARA ....................................................... 200146

B Migration between SARA-G3 and SARA-U2 ........................................................... 206151

B.1 Overview ............................................................................................................... 206151

B.2 Pin-out comparison between SARA-G3 and SARA-U2 ................................................. 207152

B.3 Schematic for SARA-G3 and SARA-U2 integration ...................................................... 209153

C Glossary .................................................................................................................... 210154

Related documents .......................................................................................................... 213156

Revision history ............................................................................................................... 215157

Contact ............................................................................................................................ 217159

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1 System description

1.1 Overview

SARA-G3 series are versatile 2.5G GSM/GPRS wireless modules in a miniature LGA (Land Grid Array) form factor.

SARA-G350 is a full feature quad-band GSM/GPRS wireless module with a comprehensive feature set including an extensive set of internet protocols. SARA-G350 also provides fully integrated access to u-blox GNSS positioning chips and modules, with embedded A-GPS (AssistNow Online and AssistNow Offline) functionality.

SARA-G310 and SARA-G300 are respectively quad-band and dual-band GSM/GPRS wireless modules targeted for high volume cost sensitive applications, providing GSM/GPRS functionalities with a reduced set of additional features to minimize the customer’s total cost of ownership.

SARA-G3 wireless modules are certified and approved by the main regulatory bodies and operators, and RIL software for Android and Embedded Windows are available free of charge. SARA-G3 modules are manufactured in ISO/TS 16949 certified sites. Each module is tested and inspected during production. The modules are qualified according to ISO 16750 – Environmental conditions and electrical testing for electrical and electronic equipment for road vehicles.

Table 1Table 1 describes a summary of interfaces and features provided by SARA-G3 modules.

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Module

Data Rate

Bands

Interfaces

Audio

Functions

GPRS multi-slot class 10

GSM/GPRS quad-band

GSM/GPRS dual-band

(900/1800)

UART

SPI

USB

DDC for u-blox GNSS receivers

GPIO

Analog Audio

Digital Audio

Network indication

Antenna detection

Jamming detection

Embedded TCP/UDP

FTP, HTTP, SMTP

SSL

GNSS via Modem

AssistNow software

FW update over AT (FOAT)

FW update over the air

(FOTA)

In-band modem

CellLocate

Low power idle-mode

ATEX certification

SARA-G300

• • 2 • E

SARA-G310

• • 2 • E

SARA-G350

• • 2 • 4 • • • • • • • • • • A • • •

SARA-G350 ATEX

• • 2 • 4 • • • • • • • • • • A • • •

•

A = available upon request E = 32 kHz signal at EXT32K input pin is required for low power idle-mode

Table 1: SARA-G3 series features summary1

Item

SARA-G300

SARA-G310

SARA-G350

GSM/GPRS Protocol Stack

3GPP Release 99

Mobile Station Class

Class B2

GSM/GPRS Bands

E-GSM 900 MHz DCS 1800 MHz

GSM 850 MHz E-GSM 900 MHz DCS 1800 MHz PCS 1900 MHz

GSM/GPRS Power Class

Class 4 (33 dBm) for 900 Class 1 (30 dBm) for 1800

Class 4 (33 dBm) for 850/900 Class 1 (30 dBm) for 1800/1900

Packet Switched Data Rate

GPRS multi-slot class 103 Coding scheme CS1-CS4 Up to 85.6 kb/s DL4 Up to 42.8 kb/s UL4

SARA-G3 series - System Integration Manual

Table 2Table 2 reports a summary of GSM/GPRS characteristics of SARA-G3 series modules.

SARA-G350 ATEX modules provide the same feature set of the SARA-G350 modules plus the certification for use in potentially

explosive atmospheres. Unless otherwise specified, SARA-G350 refers to all SARA-G350 ATEX modules and SARA-G350 modules.

Device can be attached to both GPRS and GSM services (i.e. Packet Switch and Circuit Switch mode) using one service at a

time.

GPRS multi-slot class 10 implies a maximum of 4 slots in DL (reception) and 2 slots in UL (transmission) with 5 slots in

total.

The maximum bit rate of the module depends on the current network settings.

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Item

SARA-G300

SARA-G310

SARA-G350

Circuit Switched Data Rate

Up to 9.6 kb/s DL/UL4 Transparent mode Non transparent mode

Network Operation Modes

I to III

Table 2: SARA-G3 series GSM/GPRS characteristics summary

SARA-G3 series - System Integration Manual

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1.2 Architecture

Memory

V_BCKP (RTC)

V_INT (I/O)

32 kHz

26 MHz

Transceiver

Power

Management

Baseband

ANT

SAW Filter

Sw itch

VCC (Supply)

32 kHz

Auxiliary UART

SIM Card

UART

Power-On Reset

Memory

V_BCKP (RTC)

V_INT (I/O)

26 MHz

32.768 kHz

Transceiver

Power

Management

Baseband

ANT

SAW

Filter

Switch

VCC (Supply)

Auxiliary UART DDC (for GNSS)

SIM Card Detection

SIM Card

UART

Power-On Reset

Digital Audio

Analog Audio

GPIO Antenna Detection

SARA-G3 series - System Integration Manual

Figure 1: SARA-G300 and SARA-G310 modules block diagram

Figure 2: SARA-G350 modules block diagram

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1.2.1 Internal blocks

SARA-G3 modules consist of the following internal sections: RF, Baseband and Power Management.

RF section

The RF section is composed of the following main elements:

 RF transceiver performing modulation, up-conversion of the baseband I/Q signals, down-conversion and

demodulation of the RF received signals. The RF transceiver includes:

Constant gain direct conversion receiver with integrated LNAs Highly linear RF quadrature GMSK demodulator Digital Sigma-Delta transmitter GMSK modulator Fractional-N Sigma-Delta RF synthesizer

3.8 GHz VCO Digital controlled crystal oscillator

 Transmit module, which amplifies the signals modulated by the RF transceiver and connects the single

antenna input/output pin (ANT) of the module to the suitable RX/TX path, via its integrated parts:

Power amplifier Antenna switch

 RX diplexer SAW (band pass) filters  26 MHz crystal, connected to the digital controlled crystal oscillator to perform the clock reference in

active-mode or connected-mode

Baseband and Power Management section

The Baseband and Power Management section is composed of the following main elements:

 Baseband processor, a mixed signal ASIC which integrates:

Microprocessor for controller functions DSP core for GSM/GPRS Layer 1 and audio processing Dedicated peripheral blocks for parallel control of the digital interfaces Audio analog front-end

 Memory system in a multi-chip package integrating two devices:

NOR flash non-volatile memory PSRAM volatile memory

 Voltage regulators to derive all the system supply voltages from the module supply VCC

SARA-G350 modules have an internal 32.768 kHz crystal connected to the oscillator of the RTC (Real Time Clock) block that gives the RTC clock reference needed to provide the RTC functions as well as to reach the very low power idle-mode (with power saving configuration enabled by the AT+UPSV command).

SARA-G300 and SARA-G310 modules do not have an internal 32.768 kHz crystal: a proper 32 kHz signal must be provided at the EXT32K input pin of the modules to give the RTC clock reference and to provide the RTC functions as well as to reach the very low power idle-mode (with power saving configuration enabled by the AT+UPSV command). The 32K_OUT output pin of SARA-G300 and SARA-

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G310 modules provides a 32 kHz reference signal suitable only to feed the EXT32K input pin, furnishes the reference clock for the RTC, and allows low power idle-mode and RTC functions support with modules switched on.

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Function

Pin Name

Module

Pin No

I/O

Description

Remarks

Power

VCC

All

51, 52, 53

Module supply input

VCC pins are internally connected each other. VCC supply circuit affects the RF performance

and compliance of the device integrating the module with applicable required certification schemes. See section 1.5.11.5.1 for functional description and requirements for the VCC module supply. See section 2.1.12.1.1 for external circuit designin.

GND

All

1, 3, 5, 14, 20-22, 30, 32, 43, 50, 54, 55, 57-61, 63-96

N/A

Ground

GND pins are internally connected each other. External ground connection affects the RF and thermal performance of the device. See section 1.5.11.5.1 for functional description. See section 2.1.12.1.1 for external circuit designin.

V_BCKP

All 2 I/O

Real Time Clock supply input/output

V_BCKP = 2.3 V (typical) generated by internal regulator when valid VCC supply is present. See section 1.5.21.5.2 for functional description. See section 2.1.22.1.2 for external circuit designin.

V_INT

All 4 O

Digital Interfaces supply output

V_INT = 1.8 V (typical) generated by internal regulator when the module is switched on. See section 1.5.31.5.3 for functional description. See section 2.1.32.1.3 for external circuit designin.

System

PWR_ON

All

15 I Power-on input

High input impedance: input voltage level has to be properly fixed, e.g. adding external pull-up. See section 1.6.11.6.1 for functional description. See section 2.2.12.2.1 for external circuit designin.

RESET_N

All

18 I External reset input

A series Schottky diode is integrated in the module as protection, and then an internal 10 k pull-up resistor to V_INT is provided.

See section 1.6.31.6.3 for functional description. See section 2.2.22.2.2 for external circuit design-in.

EXT32K

SARA-G300 SARA-G310

31 I 32 kHz input

Input for RTC reference clock, needed to enter the low power idle-mode and provide RTC functions. See section 1.6.41.6.4 for functional description. See section 2.2.32.2.3 for external circuit design-in.

1.3 Pin-out

Table 3Table 3 lists the pin-out of the SARA-G3 modules, with pins grouped by function.

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Function

Pin Name

Module

Pin No

I/O

Description

Remarks

32K_OUT

SARA-G300 SARA-G310

24 O 32 kHz output

32 kHz output suitable only to feed the EXT32K input giving the RTC reference clock, allowing low power idle-mode and RTC functions support. See section 1.6.51.6.5 for functional description. See section 2.2.32.2.3 for external circuit design-in.

Antenna

ANT

All

I/O

RF input/output for antenna

50  nominal characteristic impedance. Antenna circuit affects the RF performance and compliance of the device integrating the module with applicable required certification schemes. See section 1.7 for functional description and requirements for the antenna RF interface. See section 2.32.3 for external circuit design-in.

ANT_DET

SARA-G350

62 I Input for antenna detection

ADC input for antenna detection function. See section 1.7.2 for functional description. See section 2.3.2 for external circuit design-in.

SIM

VSIM

All

41 O SIM supply output

VSIM = 1.80 V typ. or 2.85 V typ. automatically generated according to the connected SIM type. See section 1.81.8 for functional description. See section 2.42.4 for external circuit design-in.

SIM_IO

All

I/O

SIM data

Data input/output for 1.8 V / 3 V SIM Internal 4.7 k pull-up to VSIM. See section 1.81.8 for functional description. See section 2.42.4 for external circuit design-in.

SIM_CLK

All

38 O SIM clock

3.25 MHz clock output for 1.8 V / 3 V SIM See section 1.81.8 for functional description. See section 2.42.4 for external circuit design-in.

SIM_RST

All

40 O SIM reset

Reset output for 1.8 V / 3 V SIM See section 1.81.8 for functional description. See section 2.42.4 for external circuit design-in.

SIM_DET

All

42 I SIM detection

1.8 V input for SIM presence detection function. See section 1.8.2 for functional description. See section 2.4 for external circuit design-in.

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Function

Pin Name

Module

Pin No

I/O

Description

Remarks

UART

RXD

All

13 O UART data output

1.8 V output, Circuit 104 (RXD) in ITU-T V.24, for AT command, data communication, FOAT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

TXD

All

12 I UART data input

1.8 V input, Circuit 103 (TXD) in ITU-T V.24, for AT command, data communication, FOAT. Internal active pull-up to V_INT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

CTS

All

11 O UART clear to send output

1.8 V output, Circuit 106 (CTS) in ITU-T V.24, for AT command, Data communication, FOAT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

RTS

All

10 I UART ready to send input

1.8 V input, Circuit 105 (RTS) in ITU-T V.24, for AT command, data communication, FOAT. Internal active pull-up to V_INT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

DSR

All 6 O

UART data set ready output

1.8 V output, Circuit 107 (DSR) in ITU-T V.24, for AT command, data communication, FOAT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

All 7 O

UART ring indicator output

1.8 V output, Circuit 125 (RI) in ITU-T V.24, for AT command, data communication, FOAT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

DTR

All 9 I

UART data terminal ready input

1.8 V input, Circuit 108/2 (DTR) in ITU-T V.24, for AT command, data communication, FOAT. Internal active pull-up to V_INT.

See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

DCD

All 8 O

UART data carrier detect output

1.8 V input, Circuit 109 (DCD) in ITU-T V.24, for AT command, data communication, FOAT. See section 1.9.11.9.1 for functional description. See section 2.5.12.5.1 for external circuit designin.

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Function

Pin Name

Module

Pin No

I/O

Description

Remarks

Auxiliary UART

RXD_AUX

All

28 O Auxiliary UART data output

1.8 V output, Circuit 104 (RXD) in ITU-T V.24, for FW upgrade and trace log capture. Access by external test-point is recommended. See section 1.9.21.9.2 for functional description. See section 2.5.22.5.2 for external circuit design-in.

TXD_AUX

All

29 I Auxiliary UART data input

1.8 V input, Circuit 103 (TXD) in ITU-T V.24, for FW upgrade and trace log capture. Access by external test-point is recommended. Internal active pull-up to V_INT. See section 1.9.21.9.2 for functional description. See section 2.5.22.5.2 for external circuit design-in.

DDC

SCL

SARA-G350

27 O I2C bus clock line

1.8 V open drain, for the communication with u-blox positioning modules and chips. External pull-up required. See section 1.9.31.9.3 for functional description. See section 2.5.32.5.3 for external circuit design-in.

SDA

SARA-G350

I/O

I2C bus data line

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Function

Pin Name

Module

Pin No

I/O

Description

Remarks

Analog Audio

MIC_BIAS

SARA-G350

46 O Microphone supply output

Supply output (2.2 V typ) for external microphone. See section 1.10.11.10.1 for functional description. See section 2.6.12.6.1 for external circuit designin.

MIC_GND

SARA-G350

47 I Microphone analog reference

Local ground for the external microphone (reference for the analog audio uplink path). See section 1.10.11.10.1 for functional description. See section 2.6.12.6.1 for external circuit designin.

MIC_N

SARA-G350

48 I Differential analog audio input (negative)

Differential analog audio signal input (negative) shared for all the analog uplink path modes: handset, headset, hands-free mode. No internal DC blocking capacitor. See section 1.10.11.10.1 for functional description. See section 2.6.12.6.1 for external circuit designin.

MIC_P

SARA-G350

49 I Differential analog audio input (positive)

Differential analog audio signal input (positive) shared for all the analog uplink path modes: handset, headset, hands-free mode. No internal DC blocking capacitor. See section 1.10.11.10.1 for functional description. See section 2.6.12.6.1 for external circuit designin.

SPK_P

SARA-G350

44 O Differential analog audio output (positive)

Differential analog audio signal output (positive) shared for all the analog downlink path modes: earpiece, headset and loudspeaker mode. See section 1.10.11.10.1 for functional description. See section 2.6.12.6.1 for external circuit designin.

SPK_N

SARA-G350

45 O Differential analog audio output (negative)

Differential analog audio signal output (negative) shared for all the analog downlink path modes: earpiece, headset and loudspeaker mode. See section 1.10.11.10.1 for functional description. See section 2.6.12.6.1 for external circuit designin.

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Function

Pin Name

Module

Pin No

I/O

Description

Remarks

Digital Audio

I2S_CLK

SARA-G350

36 O I2S clock

1.8 V clock output for PCM / normal I2S modes. See section 1.10.21.10.2 for functional description. See section 2.6.22.6.2 for external circuit design-in.

I2S_RXD

SARA-G350

37 I I2S receive data

1.8 V data input for PCM / normal I2S modes. Internal active pull-down to GND. See section 1.10.21.10.2 for functional description. See section 2.6.22.6.2 for external circuit design-in.

I2S_TXD

SARA-G350

35 O I2S transmit data

1.8 V data output for PCM / normal I2S modes. See section 1.10.21.10.2 for functional description. See section 2.6.22.6.2 for external circuit design-in.

I2S_WA

SARA-G350

34 O I2S word alignment

1.8 V word al. output for PCM / normal I2S modes See section 1.10.21.10.2 for functional description. See section 2.6.22.6.2 for external circuit design-in.

GPIO

GPIO1

SARA-G350

I/O

GPIO

1.8 V GPIO by default configured as pad disabled. See section 1.111.11 for functional description. See section 2.72.7 for external circuit design-in.

GPIO2

SARA-G350

I/O

GPIO

1.8 V GPIO by default configured to provide the custom GNSS supply enable function. See section 1.111.11 for functional description. See section 2.72.7 for external circuit design-in.

GPIO3

SARA-G350

I/O

GPIO

1.8 V GPIO by default configured to provide the custom GNSS data ready function. See section 1.111.11 for functional description. See section 2.72.7 for external circuit design-in.

GPIO4

SARA-G350

I/O

GPIO

1.8 V GPIO by default configured to provide the custom GNSS RTC sharing function. See section 1.111.11 for functional description. See section 2.72.7 for external circuit design-in.

Reserved

RSVD

All

N/A

RESERVED pin

This pin must be connected to ground. See section 2.82.8

RSVD

All

17, 19

N/A

RESERVED pin

Leave unconnected. See section 2.82.8

RSVD

SARA-G350

N/A

RESERVED pin

Internally not connected. Leave unconnected. See section 2.82.8

RSVD

SARA-G300 SARA-G310

16, 23, 25-27, 34-37

N/A

RESERVED pin

Pad disabled. Leave unconnected. See section 2.82.8

RSVD

SARA-G300 SARA-G310

44-49, 62

N/A

RESERVED pin

Leave unconnected. See section 2.82.8

Table 3: SARA-G3 series modules pin definition, grouped by function

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General Status

Operating Mode

Definition

Power-down

Not-Powered Mode

VCC supply not present or below operating range: module is switched off.

Power-Off Mode

VCC supply within operating range and module is switched off.

Normal Operation

Idle-Mode

Module processor core runs with 32 kHz reference, that is generated by:

 The internal 32 kHz oscillator (SARA-G350)  The 32 kHz signal provided at the EXT32K pin (SARA-G300 and SARA-

G310)

Active-Mode

Module processor core runs with 26 MHz reference generated by the internal oscillator.

Connected-Mode

Voice or data call enabled and processor core runs with 26 MHz reference.

Operating Mode

Description

Transition between operating modes

Not-Powered Mode

Module is switched off. Application interfaces are not accessible. Internal RTC timer operates on SARA-G350

modules only if a valid voltage is applied to V_BCKP pin. Additionally, a proper external 32 kHz signal must be fed to EXT32K pin on SARA-G300 / SARA-G310 to let RTC timer running that otherwise is not in operation.

When VCC supply is removed, the module enters not-powered mode.

When in not-powered mode, the module cannot be switched on by a low level on PWR_ON input or by a preset RTC alarm.

When in not-powered mode, the module can be switched on applying VCC supply (refer to 2.2.1) so that the module switches from not-powered to activemode.

Power-Off Mode

Module is switched off: normal shutdown by an appropriate power-off event (refer to 1.6.2).

Application interfaces are not accessible. Internal RTC timer operates on SARA-G350

modules. A proper external 32 kHz signal must be fed to the EXT32K pin on SARA-G300 / SARA-G310 to let RTC timer running that otherwise is not in operation.

When the module is switched off by an appropriate power-off event (refer to 1.6.2), the module enters power-off mode from active-mode.

When in power-off mode, the module can be switched on by a low level on PWR_ON input or by a preset RTC alarm (refer to 2.2.1): module switches from power-off to active-mode.

When VCC supply is removed, the module switches from power-off mode to not-powered mode.

1.4 Operating modes

SARA-G3 modules have several operating modes. The operating modes defined in Table 4Table 4 and described in detail in Table 5Table 5 provide general guidelines for operation.

Table 4: Module operating modes definition

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Operating Mode

Description

Transition between operating modes

Idle-Mode

The module is not ready to communicate with an external device by means of the application interfaces since configured to reduce power consumption.

The module automatically enters idle-mode whenever possible if power saving is enabled by the AT+UPSV command (refer to

u-blox AT Commands

Manual

[2]), reducing power consumption (refer to

1.5.1.3). The CTS output line indicates when the UART

interface is disabled/enabled due to the module idle/active-mode according to power saving and hardware flow control settings (refer to 1.9.1.3,

1.9.1.4). Power saving configuration is not enabled by default:

it can be enabled by the AT+UPSV command (see

u-blox AT Commands Manual

[2]).

A proper 32 kHz signal must be fed to the EXT32K pin of SARA-G300 and SARA-G310 modules to let idle-mode that otherwise cannot be reached (this is not needed for the other SARA-G3 series modules).

The module automatically switches from active-mode to idle-mode whenever possible if power saving is enabled (refer to sections 1.5.1.3, 1.9.1.4 and to the

u-blox AT Commands Manual

[2], AT+UPSV).

The module wakes up from idle-mode to active-mode in the following events:

 Automatic periodic monitoring of the paging

channel for the paging block reception according to network conditions (refer to 1.5.1.3, 1.9.1.4)

 Automatic periodic enable of the UART interface

to receive and send data, if the power saving AT command is set to 1 (refer to 1.9.1.4)

 RTC alarm occurs (refer to

u-blox AT

Commands Manual

[2], AT+CALA command)

 Data received on UART interface (refer to

1.9.1.4)

 RTS input line set to the ON state by the DTE

if hardware flow control has been disabled by AT&K3 and the power saving AT command is set to 2 (refer to 1.9.1.4)

 GNSS data ready: when the GPIO3 pin is

informed by the connected u-blox GNSS receiver that it is ready to send data via the DDC (I2C) interface (refer to 1.11, 1.9.3)

Active-Mode

The module is ready to communicate with an external device by means of the application interfaces unless power saving configuration is enabled by the AT+UPSV command (refer to sections 1.5.1.3, 1.9.1.4 and to the

u-blox AT

Commands Manual

[2]).

When the module is switched on by an appropriate power-on event (refer to 2.2.1), the module enters active-mode from not-powered or power-off mode.

If power saving configuration is enabled by the AT+UPSV command, the module automatically switches from active to idle-mode whenever possible and the module wakes up from idle to active-mode in the events listed above (refer to idle to active transition description).

When a voice call or a data call is initiated, the module switches from active-mode to connectedmode.

Connected-Mode

A voice call or a data call is in progress. The module is ready to communicate with an

external device by means of the application interfaces unless power saving configuration is enabled by the AT+UPSV command (see sections

1.5.1.3, 1.9.1.4 and the

u-blox AT Commands

Manual

[2][2]).

When a voice call or a data call is initiated, the module enters connected-mode from active-mode.

When a voice call or a data call is terminated, the module returns to the active-mode.

Table 5: Module operating modes description

Figure 3Figure 3 describes the transition between the different operating modes.

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Switch ON:

• Apply VCC

If power saving is enabled and there is no activity for a defined time interval

Any wake up event described in the module operating

modes summary table above

Incoming/outgoing call or other dedicated device network communication

Call terminated,

communication dropped

Remove VCC

Switch ON:

• PWR_ON

• RTC Alarm

Not

powered

Power off

ActiveConnected Idle

Switch OFF:

• AT+CPWROFF

Figure 3: Operating modes transition

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Item

Requirement

Remark

VCC nominal voltage

Within VCC normal operating range:

3.35 V min. / 4.50 V max.

The module cannot be switched on if VCC voltage value is below the normal operating range minimum limit. Ensure that the input voltage at VCC pins is above the minimum limit of the normal operating range for at least more than 3 s after the module switch-on.

VCC voltage during normal operation

Within VCC extended operating range:

3.00 V min. / 4.50 V max.

The module may switch off when VCC voltage drops below the extended operating range minimum limit. Operation above extended operating range maximum limit is not recommended and exposure beyond it may affect device reliability.

VCC average current

Considerably withstand maximum average current consumption value in connected-mode conditions specified in

SARA-G3 series Data Sheet

[1][1].

The maximum average current consumption can be greater than the specified value according to the actual antenna mismatching, temperature and VCC voltage. Section 1.5.1.21.5.1.2 describes connected-mode current.

1.5 Supply interfaces

1.5.1 Module supply input (VCC)

SARA-G3 modules must be supplied via the three VCC pins that represent the module power supply input.

The VCC pins are internally connected to the RF power amplifier and to the integrated Power Management Unit: all supply voltages needed by the module are generated from the VCC supply by integrated voltage regulators, including V_BCKP Real Time Clock supply, V_INT digital interfaces supply and VSIM SIM card supply.

During operation, the current drawn by the SARA-G3 series modules through the VCC pins can vary by several orders of magnitude. This ranges from the high peak of current consumption during GSM transmitting bursts at maximum power level in connected-mode (as described in section 1.5.1.2), to the low current consumption during low power idle-mode with power saving enabled (as described in section

1.5.1.3).

1.5.1.1 VCC supply requirements

Table 6Table 6 summarizes the requirements for the VCC module supply. Refer to section 2.1.1 for all

the suggestions to properly design a VCC supply circuit compliant to the requirements listed in Table

6Table 6.

The VCC supply circuit affects the RF compliance of the device integrating SARA-G3 series module with

applicable required certification schemes as well as antenna circuit design. Compliance is guaranteed if the VCC requirements summarized in the Table 6Table 6 are fulfilled.

UBX-13000995 - R06 Objective Specification System description Page 27 of 218

Formatted: Font: 8 pt

Formatted: Font: 8 pt, French

(France)

Item

Requirement

Remark

VCC peak current

Withstand the maximum peak current consumption specified in the

SARA-G3 series Data

Sheet

[1][1].

The specified maximum peak of current consumption occurs during GSM single transmit slot in 850/900 MHz connected-mode, in case of mismatched antenna. Section 1.5.1.21.5.1.2 describes connected-mode current.

VCC voltage drop during Tx slots

Lower than 400 mV

VCC voltage drop values greater than recommended during 2G TDMA transmission slots directly affect the RF compliance with applicable certification schemes.

Figure 5Figure 5 describes VCC voltage drop during

Tx slots.

VCC voltage ripple during Tx slots

Lower than 30 mVpp if f

ripple

≤ 200 kHz

Lower than 10 mVpp if 200 kHz < f

ripple

≤ 400 kHz Lower than 2 mVpp if f

ripple

> 400 kHz

VCC voltage ripple values higher than recommended during 2G transmission directly affect the RF compliance with applicable certification schemes.

Figure 5Figure 5 describes VCC voltage ripple during

Tx slots.

VCC under/over-shoot at start/end of Tx slots

Absent or at least minimized

VCC under/over-shoot higher than recommended at the start/end of 2G TDMA transmission slots directly affect the RF compliance with applicable certification schemes.

Figure 5Figure 5 describes VCC voltage under/over-

shoot at the start/end of Tx slots

Table 6: Summary of VCC supply requirements

SARA-G3 series - System Integration Manual

Formatted: Font: 8 pt

Formatted: Font: 8 pt, French

(France)

Formatted: Font: 8 pt

For the additional specific requirement for SARA-G350 ATEX modules integration in potentially

explosive atmospheres applications, refer to section 2.13.

1.5.1.2 VCC current consumption in connected-mode

When a GSM call is established, the VCC consumption is determined by the current consumption profile typical of the GSM transmitting and receiving bursts.

The current consumption peak during a transmission slot is strictly dependent on the transmitted power, which is regulated by the network. If the module is transmitting in GSM talk mode in the 850 or 900 MHz bands, at the maximum RF power control level (approximately 2 W or 33 dBm in the allocated transmit slot/burst) the current consumption can reach up to 1900 mA (with a highly unmatched antenna) for 576.9 µs (width of the transmit slot/burst) with a periodicity of 4.615 ms (width of 1 frame = 8 slots/burst), so with a 1/8 duty cycle according to GSM TDMA (Time Division Multiple Access). If the module is in GSM connected-mode in the 1800 or 1900 MHz bands, the current consumption figures are lower than the one in the 850 or 900 MHz bands, due to 3GPP transmitter output power specifications (refer to

During a GSM call, current consumption is in the order of 60-120 mA in receiving or in monitor bursts and is about 10-40 mA in the inactive unused bursts (low current period). The more relevant factor for determining the average current consumption, is the transmitted power in the transmit slot.

Figure 4Figure 4 shows an example of the module current consumption profile versus time in GSM talk

mode.

SARA-G3 series Data Sheet

[1]).

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Time [ms]

slot

unused

slot

unused

slot

unused

slot

unused

slot

MON

slot

unused

slot

unused

slot

unused

slot

unused

slot

unused

slot

MON

slot

unused

slot

GSM frame

4.615 ms

(1 frame = 8 slots)

Current [A]

200 mA

60-120 mA

1900 mA

Peak current

depends on

TX power

GSM frame

4.615 ms

(1 frame = 8 slots)

1.5

1.0

0.5

0.0

2.0

60-120 mA

10-40 mA

Time

undershoot

overshoot

ripple

drop

Voltage

3.8 V

(typ)

slot

unused

slot

unused

slot

unused

slot

unused

slot

MON

slot

unused

slot

RX slot

unused

slot

unused

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: VCC current consumption profile versus time during a GSM call (1 TX slot, 1 RX slot)

Figure 5Figure 5 illustrates VCC voltage profile versus time during a GSM call, according to the relative

VCC current consumption profile described in Figure 4Figure 4.

Figure 5: Description of the VCC voltage profile versus time during a GSM call

When a GPRS connection is established, more than one slot can be used to transmit and/or more than one slot can be used to receive. The transmitted power depends on network conditions, which set the peak current consumption, but following the GPRS specifications the maximum transmitted RF power is reduced if more than one slot is used to transmit, so the maximum peak of current is not as high as can be in case of a GSM call.

If the module transmits in GPRS multi-slot class 10, in the 850 or 900 MHz bands, at the maximum power control level, the consumption can reach up to 1600 mA (with highly unmatched antenna). This happens for 1.154 ms (width of the 2 Tx slots/bursts) with a periodicity of 4.615 ms (width of 1 frame

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Time [ms]

slot

unused

slot

unused

slot

unused

slot

MON

slot

unused

slot

unused

slot

unused

slot

unused

slot

MON

slot

unused

slot

GSM frame

4.615 ms

(1 frame = 8 slots)

Current [A]

60-120mA

GSM frame

4.615 ms

(1 frame = 8 slots)

1.5

1.0

0.5

0.0

2.0

60-120mA

10-40mA

200mA

Peak current

depends on

TX power

1600 mA

= 8 slots/bursts), so with a 1/4 duty cycle, according to GSM TDMA. If the module is in GPRS connected-mode in 1800 or 1900 MHz bands, consumption figures are lower than in the 850 or 900 MHz band, due to 3GPP Tx power specifications.

Figure 6Figure 6 reports the current consumption profiles in GPRS connected-mode, in the 850 or 900

MHz bands, with 2 slots used to transmit and 1 slot used to receive.

Figure 6: VCC current consumption profile versus time during a GPRS connection (2 TX slots, 1 RX slot)

UBX-13000995 - R06 Objective Specification System description Page 30 of 218

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