Janus remote communications Cellbridge lte310smt User manual

CellBridge LTE310SMT v1.00 World

Wide CAT-M1/NB-IoT User Manual

Bulletin JA24UM-LTE310SMT v1

Revision 02

Date 19 Jan 2022

LTE310SMT v1.00 Hardware User Manual

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Page 2 Rev: 02 Date: 01/19/22

TABLE OF CONTENTS

TABLE OF CONTENTS and DISCLAIMER .............................................................................................................................. 2

1 APPLICABILITY TABLE ........................................................................................................................................................ 3

2 REFERENCES ...................................................................................................................................................................... 3

2.1 Janus Document List ............................................................................................................................................... 3

2.2 Telit Document List .................................................................................................................................................. 3

3 OVERVIEW ........................................................................................................................................................................ 4-6

3.1 Introduction ............................................................................................................................................................. 4

3.2 Preview .................................................................................................................................................................... 4

3.3 Features ................................................................................................................................................................... 5

3.4 Block Diagram ......................................................................................................................................................... 5

3.5 FOTA Notice ............................................................................................................................................................ 6

4 INTERFACES ................................................................................................................................................................... 7-13

4.1 Antenna Connectors................................................................................................................................................ 7

4.2 SIM Holder .............................................................................................................................................................. 7

4.3 LGA Signals ........................................................................................................................................................ 8-13

5 LTE310SMT TECHNICAL SPECIFICATIONS ................................................................................................................14-17

5.1 Electrical Speciﬁcations ................................................................................................................................... 14-16

5.2 Mechanical Drawings ............................................................................................................................................ 17

6 OPERATION .................................................................................................................................................................. 18-22

6.1 Powering ON/OFF ................................................................................................................................................. 18

6.2 Communicating with the Modem .......................................................................................................................... 18

6.3 Testing Communications ....................................................................................................................................... 18

6.4 Cellular Network Communications ...................................................................................................................19-20

6.5 Data Communications ...................................................................................................................................... 20-21

6.6 SMS ....................................................................................................................................................................... 21

6.7 GNSS ..................................................................................................................................................................... 21

6.8 Firmware Selection ................................................................................................................................................ 22

7 DESIGN CONSIDERATIONS .............................................................................................................................................. 22

7.1 Minimum required Modem Pin-Connection .......................................................................................................... 22

7.2 Debug .................................................................................................................................................................... 22

APPENDICES ................................................................................................................................................................... 23-24

Approvals .............................................................................................................................................................. 23

Antenna Care and Replacement ........................................................................................................................... 23

Abbreviations ......................................................................................................................................................... 23

Ordering Information ............................................................................................................................................. 24

Revision History..................................................................................................................................................... 24

DISCLAIMER

The information contained in this document is the proprietary information of Connor-Winﬁeld Corporation and its afﬁliates (Janus Remote Communication). The contents are

conﬁdential and any disclosure to persons other than the ofﬁcers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of

Connor-Winﬁeld, is strictly prohibited. Connor-Winﬁeld makes every effort to ensure the quality of the information it makes available. Notwithstanding the foregoing, Connor-Winﬁeld

does not make any warranty as to the information contained herein, and does not accept any liability for any injury, loss or damage of any kind incurred by use of or reliance upon the

information. Connor-Winﬁeld disclaims any and all responsibility for the application of the devices characterized in this document, and notes that the application of the device must

comply with the safety standards of the applicable country, and where applicable, with the relevant wiring rules. Connor-Winﬁeld reserves the right to make modiﬁcations, additions

and deletions to this document due to typographical errors, inaccurate information, or improvements to programs and/or equipment at any time and without notice. Such changes

will, nevertheless be incorporated into new editions of this application note.

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1 APPLICABILITY TABLE

Product Part Number

LTE310SMT v1.00

2 REFERENCES

2.1 Janus Document List

Janus Application Note 117 - FOTA (Firmware Over The Air)

2.2 Telit Document List

Our modem uses Telit ME310G1-WW cellular module.

Please refer to Telit’s website at www.telit.com for the latest information on the ME310G1 module family.

Telit ME310G1/ME910G1/ML865G1 AT Commands Reference Guide

Telit ME310G1 Hardware Design Guide

Telit ME310G1/ME910G1/ML865G1 PSM Application Note

Telit MEx10G1 GNSS Application Note

Telit IP Easy User Guide

Telit Single SKU AT Command Application Note

Telit ME910C1/MEx10G1 Quick Start Guide [a.k.a. Telit Cat M/NB-IoT Quick Start Guide]

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3 OVERVIEW

3.1 Introduction

The User Manual for the SMT footprint Modem devices is intended to illustrate how users can integrate and

implement the features of each communication version of the device. The common factors are explained in detail,

as well as special considerations and diagrams for the Modem. The Modem differences are highlighted in this

manual for design considerations for future model placement.

3.2 Preview

The SMT footprint Modems are self-contained, multi-band, globally capable, IoT and M2M communication devices

designed to provide a comprehensive solution to application problems for our customers. They utilize the proven

technology of Telit’s certiﬁed modules for their core communications engines.

3.2.1 Functional Description

Cellular

• LTE Cat.M1 / NB IoT

GNSS Functionality

• GPS, GLONASS, Beidou, Galileo and QZSS

UART

• 115200 bps default supporting up to 6 standard RS232 signals

USB

• HS/FS USB 2.0 Device (480Mb/s)

Physical Dimensions

• Length and width of all devices are equal

• Heights of different devices will vary

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• Multi-Band Support

• LTE (4G) Bands: B1, B2, B3, B4, B5, B8, B12, B13, B18,

B19, B20, B25, B26, B27, B28, B66, B71, B85

• GSM (2G) Bands: B2, B3, B5, B8

• LTE Output Power: 23dBm (Power Class 3)

• GSM Output Power: 33dBm (Power Class 4)

• LTE: DL: Up to 588 kbps, UL up to 1Mbps

• GNSS (Global Navigation Satellite System) includes GPS,

GLONASS, Beidou and Galileo

• Control via standard and extended AT command set

• SIM application Tool Kits 3GPP TS 51.01

• IP stack with TCP/UDP protocol support

• SMS Support

• 89 pad LGA module

• Dimensions: 35 mm x 26 mm x 3.56 mm

• Operational Temperature Range: -40°C to 85°C

• Internal Switching Regulator:

Input Voltage Range: 2.5 to 5.25Vdc (5Vdc nominal)

Supply disable via terminal input pin

• Cellular and GNSS antenna connections via Hirose U.FL

miniature RF connectors

3.4 Block Diagram

3 OVERVIEW continued

3.3 Features

Figure 1 LTE310SMT v1.00 Block Diagram

Telit

ME310G1-WW

NANO (4FF)

SIM HOLDER

POWER

MANAGEMENT

8

9

pad LGA

footprint

I/O

&

Control

Signals

Cellular & GNSS Antennas

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3 OVERVIEW continued

3.5 FOTA Notice

The certification of LTE devices for use on the Verizon Wireless network REQUIRES that the end user

implement an automated FOTA procedure on their devices that would allow the cellular module

firmware to be updated if required.

Failure to implement an automated FOTA procedure violates the certification requirements of the

cellular modem and may result in units becoming unusable on the cellular network in the future. Your

end device must support the firmware over the air update for the cellular modem

You may use your own FOTA system to update the cellular modem firmware over the air. You may also

be able to use the Verizon Wireless FOTA system, and FOTA services may be available from other 3rd

party vendors.

To inquire about Verizon Wireless FOTA system information and technical specifications, contact

VZW.FOTA-Services@VerizonWireless.com

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4 INTERFACES

The top side of the LTE310SMT provides cellular and GNSS antenna connections and a SIM card holder. All power

and signal connections are made through the LGA footprint.

4.1 Antenna Connectors

Two U.FL connectors provide antenna connections for the cellular antenna and the GNSS antenna. The GNSS

antenna is provided with a 3.3V bias supply for LNA (low noise ampliﬁers) typically found in GPS antennas. This

bias supply is only active when the module GNSS feature is turned on.

4.2 SIM Holder

A ‘push-push’ (push to lock, push to release) on-board nano (4FF) SIM card holder is provided. The SIMSEL

signal must be tied low in order to utilize the SIM holder. All SIM signals from the ME310G1 module connect to the

SIM holder. The SIM holder card presence switch is connected to the SIMSEL LGA pad.

Figure 2 LTE310SMT Top - SIM Holder

GNSS Antenna

connector

Cellular Antenna

connector

SIM card holder

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4 Interfaces continued

4.3 LGA Signals

Most of the LGA signals on the LTE310SMT module are direct connections to corresponding signals on the

ME310G1-WW cellular module. See the Telit ME310G1 Hardware Design Guide for complete information on these

signals.

A few ME310G1 signals, including VBATT (power input) GPS_LNA, and the SIM card interface signals are not

directly available but are utilized in the on-board circuitry.

Almost all digital signals operate at a 1.8V CMOS level. Output drive capability is typically 1 mA

4.3.1 LGA Pad Signal Table

Pad Signal I/O Function Type Telit ME310G1 Pad Notes

Asynchronous Serial Port (USIF0) [Note 1]

H8 TXD0 I Transmit line CMOS 1.8V Y16 2

H9 RXD0 O Receive line CMOS 1.8V AA15

I9 CTS0 O Clear to Send CMOS 1.8V AA17

I8 RTS0 I Request to Send CMOS 1.8V Y18 2

Asynchronous Serial Port (USIF1)

H10 TXD1 I Transmit line CMOS 1.8V Y12 2

H11 RXD1 O Receive line CMOS 1.8V AA11 3

I10 CTS1 O Clear to Send CMOS 1.8V Y14

I11 RTS1 I Request to Send CMOS 1.8V AA13 2

Auxiliary Serial Port

I12 TX_AUX O Auxiliary UART ouput data line CMOS 1.8V Y10

H12 RX_AUX I Auxiliary UART input data line CMOS 1.8V AA9 2

USB HS 2.0 Communication Port

I6 USB_D_P I/O USB differential Data (+) USB data U19

I7 USB_D_N I/O USB differential Data (-) USB data V18

H6 USB_VBUS I USB Power Sense 5.25v max T18

SPI

F11 SPI_CS I/O SPI_CS I/O SPI Chip Select CMOS 1.8V Y6

F12 SPI_CLK I/O SPI_CLK I/O SPI Clock CMOS 1.8V AA7

G11 SPI_MISO I/O SPI_MISO I/O SPI MISO CMOS 1.8V Y8

G12 SPI_MOSI I/O SPI_MOSI I/O SPI MOSI CMOS 1.8V AA5

DIGITAL IO

C1 GPIO_01 I/O General Purpose I/O CMOS 1.8V V11 4, 5

C2 GPIO_02 I/O General Purpose I/O CMOS 1.8V V13 4

C3 GPIO_03 I/O General Purpose I/O CMOS 1.8V D7 4

D1 GPIO_04 I/O General Purpose I/O CMOS 1.8V D9 4

D2 GPIO_05 I/O General Purpose I/O CMOS 1.8V D11 4

E2 GPIO_06 I/O General Purpose I/O CMOS 1.8V D13 4

ADC and DAC

G3 ADC I ADC Converter CMOS 1.8V B18

H5 DAC O DAC Converter CMOS 1.8V R16 6

SIM

A6 SIMSEL I SIM select - tie to GND for SIM holder CMOS 1.8V ---

A7 CARD_DET O SIM holder switch contact. Connects

to GND when card is present. --- ---

Audio Section

A2 DVI_CLK I/O Digital Audio Interface (BCLK) CMOS 1.8V F2

A3 DVI_TX O Digital Audio Interface (TX) CMOS 1.8V E1

B1 DVI_RX I Digital Audio Interface (RX) CMOS 1.8V D2

B2 DVI_WA0 I/O Digital Audio Interface (Word Alignment /LRCLK) CMOS 1.8V C1

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4 Interfaces continued

4.3 LGA Signals continued

4.3.1 LGA Pad Signal Table continued

Pad Signal I/O Function Type Telit ME310G1 Pad Notes

Control & Indications

I5 ON_OFF I Input Command for Power ON/OFF, wake CMOS 1.8V N16 7

from deep sleep, and unconditional reset.

B5 PWRMON O Power ON Monitor CMOS 1.8V R1

D3 S_LED O Status LED CMOS 1.8V B2

H4 GPS_PPS O 1 Pulse per Second CMOS 1.8V G16

B6 USB_BOOT I Optional pin, connect to test point CMOS 1.8V T2 4, 8

Power Supply

C11, C12, VIN Main power supply POWER ---

D11, D12

A8, A11, A12, B3, GND Ground POWER A3, A7, A9, A13,

B11, B12, D5, D6, A17, B4, B6, B10,

D7, D8, E1, E5, E6, B12, B14, B16, C19,

E7, E8, E12, F5, F6, D18, F8, F12, F18,

F7, F8, G10, H3, H7 G19, H6, H14, J19,

K18, M18, N19, P6,

P14, T8, T12, U1,

V2, W19, Y2, Y4

B7 CTANK Internal supply domain pin for external 1.8V N4

tank capacitor

B10 ENABLE On-board power supply enable. VIN ---

Pulled up to VIN via 200K ohm

Pull LOW to disable supply.

RESERVED [Note 9]

A4 RSVD_H2 RESERVED Do not connect H2 10

A5 RSVD_J1 RESERVED Do not connect J1 10

A9 RSVD_V9 RESERVED Do not connect V3 10

B4 RSVD_G4 RESERVED Do not connect G4 10

B8 RSVD_R4 RESERVED Do not connect R4 10

B9 RSVD_L4 RESERVED Do not connect L4 10

E3 RSVD_B8 RESERVED Do not connect B8 10

E10 RSVD_V7 RESERVED Do not connect V7 10

F1 RSVD_J16 RESERVED Do not connect J16 10

F2 RSVD_J4 RESERVED Do not connect J4 10

F3 RSVD_K2 RESERVED Do not connect K2 10

F10 RSVD_R19 RESERVED Do not connect R19 10

G2 RSVD_G1 RESERVED Do not connect G1 10

H2 RSVD_P18 RESERVED Do not connect P18 10

I4 RSVD_L16 RESERVED Do not connect L16 10

NOTES

1. DTR and RING signals are available as alternate GPIO fucntions.

2. Internal 100K ohm pull-up.

3. Must be “LOW” at boot.

4. Internal 100K ohm pull-down.

5. Internal 100K ohm pull-up if conﬁgured as DTR.

6. PWM signal.

7. Active low.

8. Active high.

9. ME310G1 Reserved Pads A11, A15, and L19 are not supported.

10. Reserved pins must not be connected.

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4 Interfaces continued

4.3 LGA Signals continued

4.3.2 LGA Pad Arrangement

Figure 3 Pad Numbers Top View

4.3.3 LGA Signal Description

4.3.3.1 UARTs

Three UART interfaces are provided:

1. USIF0: Primary UART. Can be used as AT Command port and can provide GNSS NMEA stream output. It is

supported by dedicated TXD, RXD, CTS and RTS signals. DTR and RING signals can be optionally provided

by GPIO signals. Default baud rate is 115200 bps.

2. USIF1: Secondary UART. Can be used as AT Command port and can provide GNSS NMEA stream output.

It is supported by dedicated TXD and RXD signals.

Note that this UART is not supported in the current ﬁrmware release at the time of this writing.

3. AUX UART: Can be used as an AT command port, and can be used for diagnostic monitoring and

debugging (per the Telit ME310G1 Hardware Design Guide).

Note that all UART signals are 1.8 V CMOS. Level translation is usually required for application interfaces.UART

communication parameters are 15200 baud 8N1 by default.

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4 Interfaces continued

4.3.3 LGA Signals Description continued

4.3.3.2 USB

A USB 2.0 HS interface that can instantiate multiple interfaces on a host device, including modem, COM (serial)

and network (WWAN) connections. In addition to providing command and data functions, you must implement

the USB interface to provide the ability to locally update module ﬁrmware.

In order for proper power-up of the Modems, the USB_VBUS line MUST be disconnected until the unit is

otherwise fully powered and on. If the USB_VBUS line is attached and powered before the main power is brought

up and the Modem turned on, power sequencing issues may occur.

Below is a suggested interface that implements a VBUS_ENABLE signal in order to control the USB connection to

the module.

Figure 4 USB Connection

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4 Interfaces continued

4.3.3 LGA Signals Description continued

4.3.3.3 GPIO

GPIO are conﬁgurable as input, output, and alternate function. Conﬁguration is controlled by AT commands.

Alternate functions include an ALARM pin function, temperature monitor indication, and the FASTSHDN feature.

See the AT Commands Guide for more information.

Using a GPIO Pin as INPUT

The GPIO pins, when used as inputs, can be connected to a digital output of another device and report its status,

provided this device has interface levels compatible with the voltage levels of the GPIO of the modem.

Using a GPIO Pin as OUTPUT

The GPIO pins, when used as outputs, can drive CMOS digital devices or compatible hardware. When set as

outputs the pins have a push-pull output.

4.3.3.4 SPI

The SPI interface provides a 3-wire master or slave SPI interface with chip select control. It can be used as an AT

Command port.

4.3.3.5 ADC

An Analog-to-digital input provides a 0-1.8 volt output reading with a resolution of 10 bits.

4.3.3.6 DAC

An digital PWM output that can be ﬁltered and used as a 0 to 1.8 volt analog output.

4.3.3.7 SIM

The ME310G1 SIM interface signals connect to the nano (4FF) SIM holder on the LTE310SMT board. The

following two signals supplement it’s use:

SEMSEL:

SIM Select signal. This signal must be tied to ground to enable the on-board SIM holder.

CARD_DET:

Card Detect switch. This connects to the card presence switch in the SIM card holder.

SIM status CARD_DET signal

SIM present connected to ground

SIM not present open circuit

4.3.3.8 DVI Audio

An audio interface based on the I2S serial bus interface standard is provided. The audio port can be connected to

end device using digital interface, or converted to analog using a compatible CODEC.

Note that the DVI function is not supported in the current ﬁrmware release at the time of this writing.

4.3.3.9 Control & Indicators

ON_OFF Signal

The ON_OFF signal is used to turn the module on and off. It can also be used as an unconditional shutdown

control. This signal must only be driven with an open-collector / open-drain type driver.

Figure 5 ON / OFF Driver

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4.3.3.9 Control & Indicators continued

PWRMON

The PWRMON signal is asserted to indicate that the Telit ME310G1 is on and operating. This signal operates

at 1.8 V and has a 1 mA drive capability. It can be used to sense when the module is ON, and can be used as

the 1.* V reference for external translators as long as the current capability is not exceeded.

Note that this signal will go low when the module is operating in the PSM (Power Saving Mode) on Cat.M1 and Cat.NB-IoT cellular networks.

S_LED Cellular Status LED

The S_LED output signal is used to drive an external LED to give feedback on the current network registration

status. The behavior of this signal is determined by the AT#SLED command.

See the Telit ME310G1/ME910G1/ML865G1 AT Commands Reference Guide for more information.

GPS_PPM

Note that this function is not supported in the current ﬁrmware release at the time of this writing.

USB_BOOT

This pin should be made available via a test pin connection. Per the Telit ME310G1 Hardware Design Guide:

“In some case of ﬁrmware upgrade FORCED_USB_BOOT pin must be set to 1.8V during poweron of ME310G1.”

4.3.3.10 Power

VIN

VIN is the main supply to the on-board switching supply. It is capable of accepting between 2.5 v and 5.25 volts.

ENABLE

This is an enable signal to the on-board switching power supply. It is normally tied to VIN via a 200K ohm

resistor. To disable the on-board supply, pull this signal to ground.

CTANK

This signal provides a connection to the internal supply of the ME310G1. It can be used to additional

capacitance for enhanced power loss recovering and as a pull-up in speciﬁc use cases. See the Telit

ME310G1 Hardware Design Guide.

4.3.3.11 Reserved pads

A number of signal pads have been designated for future use by Telit. Most of these pads are brought out to the

LGA footprint to support future use. All ‘RESERVED’ pads should be left unconnected.

Note: ME310G1 Reserved Pads A11, A15, and L19 are not supported

4 Interfaces continued

4.3.3 LGA Signals Description continued

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5 LTE310SMT TECHNICAL SPECIFICATIONS

5.1 Electrical Speciﬁcation

5.1.1 Absolute Maximum Ratings

Parameter Min Typ Max Unit Note

Input on ant 1.8 VCMOS Signal -0.3 - 2.1 Volt

Storage Temperature -40 - 85 °C

Moisture Sensitivity - Level 3 -

VIN Supply Voltage 0 - 7.0 Volt

Operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions is not implied. Exposure to Absolute

Maximum Rating conditions for extended periods of time may affect device reliability.

5.1.2 Recommended Operating Conditions

Parameter Min Typ Max Unit Note

Temperature -40 - 85 °C

VIN Supply Voltage 2.5 5.0 5.25 Volt

GNSS Antenna Bias Voltage (P3) - 3.3 - Volt 1

Note: 1. Bias voltage only available when GNSS is enabled.

5.1.3 Power Consumption 1, 2, 3

Mode Average (mA) Peak (mA) Mode Description

Switched Off

Module Off; power ENABLE open (ON) 0.05 Module supplied but switched

Module OFF; power ENABLE low (OFF) 0.025 On-board power supply disabled

Mode Average (mA) Peak (mA) Mode Description

IDLE MODE CATM (mA) NBIotT (mA) 2G (mA)

AT+CFUN=1 8.1 7.8 7.6 Normal mode: full functionality of the module

AT+CFUN=4 6.4 Disabled TX and RX; module is not registered on the network

AT+CFUN=5 1 0.83 Paging cycle #256 frames (2.56s DRx cycle)

AT+CFUN=5 0.53 0.53 81.92s eDRx cycle length (PTW=2.56s, DRX=1.28s)

AT+CFUN=5 0.18 0.18 327.68s eDRx cycle length (PTW=2.56s, DRX=1.28s) PSM enabled

AT+CFUN=5 0.11 0.11 655.36s eDRx cycle length (PTW=2.56s, DRX=1.28s) PSM enabled

AT+CFUN=5 0.07 0.07 1310.72s eDRx cycle length (PTW=2.56s, DRX=1.28s) PSM enabled

AT+CFUN=5 0.05 0.05 2621.44s eDRx cycle length (PTW=2.56s, DRX=1.28s) PSM enabled

AT+CFUN=5 0.79 Paging Multiframe 9 PSM MODE Typical (mA)

PSM MODE

AT+CPSMS=1 28uA 28uA N/A No current source or sink by any connected pin

CONNECTED MODE

CATM 320 930 1 RB, RMC, TBS=5, QPSK, 23dBm, Band 85, 28, 12

CATM 270 760 1 RB, RMC, TBS=5, QPSK,23dBm, Band 13, 26, 5, 18, 19, 20, 8

CATM 258 680 1 RB, RMC, TBS=5, QPSK, 23dBm, Band 3, 2, 25, 4, 1, 66

NBIoT 200 280 3.75KHz, 1 SC, RU 32ms, TBS=0, BPSK, 20dBm, Band 71

NBIoT 510 840 3.75KHz, 1 SC, RU 32ms, TBS=0, BPSK, 23dBm, Band 85, 28, 12

NBIoT 420 720 3.75KHz, 1 SC, RU 32ms, TBS=0, BPSK, 23dBm, Band 13, 26, 5, 18, 19, 20, 8

NBIoT 360 630 3.75KHz, 1 SC, RU 32ms, TBS=0, BPSK, 23dBm, Band 3, 2, 25, 4, 1, 66

NBIoT 57 250 15KHz, 12 SC, RU 1ms, TBS=5, QPSK, 21dBm, Band 71

NBIoT 74 800 15KHz, 12 SC, RU 1ms, TBS=5, QPSK, 23dBm, Band 85, 28, 12

NBIoT 66 680 15KHz, 12 SC, RU 1ms, TBS=5, QPSK, 23dBm, Band 13, 26, 5, 18, 19, 20, 8

NBIoT 65 620 15KHz, 12 SC, RU 1ms, TBS=5, QPSK, 23dBm, Band 3, 2, 25, 4, 1, 66

GPRS 250 1700 1TX + 1RX, CS1, GMSK, Band 850, 900

GPRS 140 840 1TX + 1RX, CS1, GMSK, Band 1800, 1900

Note 1: These ﬁgures are derived from the component data sheets including the Telit ME310G1Hardware Design Guide. Per Telit,

“The reported values are an average among all the product variants and bands for each network wireless technology.” Results can vary

d epending network conditions.

Note 2: Values are calculated based on 5.0 volt supply voltage and on-board power supply efﬁciency.

Note 3: Values do not include GNSS operation or GNSS antenna bias requirements.

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5 LTE310SMT TECHNICAL SPECIFICATIONS continued

5.1 Electrical Speciﬁcation continued

5.1.4 I/O Levels

The following signal functions are direct connections to the Telit ME310G1 module. For speciﬁc electrical

characteristics see the Telit ME310G1 Hardware Design Guide:

UARTS

USB

SPI

GPIO

ADC

DAC

DVI audio

ON_OFF

PWRMON

S_LED

GPS_PPS

USB_BOOT

CTANK

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5.1.5 LTE Cellular Antenna Speciﬁcations:

Parameter Description

Frequency Range Depending on frequency bands provided by the network operator, the customer

should use the most suitable antenna for those frequencies.

Bandwidth 250 MHz in LTE Band 1

140 MHz in LTE Band 2, PCS1900

170 MHz in LTE Band 3, DCS1800

445 MHz in LTE Band 4

70 MHz in LTE Band 5, GSM850

80 MHz in LTE Band 8, GSM900

47 MHz in LTE Band 12

41 MHz in LTE Band 13

60 MHz in LTE Band 18

60 MHz in LTE Band 19

71 MHz in LTE Band 20

145 MHz in LTE Band 25

80 MHz in LTE Band 26

62 MHz in LTE Band 27

100 MHz in LTE Band 28

490 MHz in LTE Band 66

Impedance 50Ω

Input Power 33 dBm average

VSWR Absolute Max ≤ 10:1

VSWR Recommended ≤ 2:1

5.1.6 LTE310SMT GNSS: GPS and GLONASS Antenna Speciﬁcations:

5.1.6.1 Antenna Speciﬁcations

Parameter Description Note

Input Voltage Range 3.3V

Frequency Range 1559.0 to 1610.0 MHz

Gain 15 to 30 dB

Impedence 50Ω

VSWR < 3:1

Current Consumption 30mA Max, 20mA Typ.

5 LTE310SMT TECHNICAL SPECIFICATIONS continued

5.1 Electrical Speciﬁcation continued

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5 LTE310SMT TECHNICAL SPECIFICATIONS continued

5.2 Mechanical Speciﬁcations

120°C

150°C

180°C

260°C

0

220°C

Up to 120 s

Typical

10 s

60 to 90 s

Typical

Temperature 260°C

Meets IPC/JEDEC J-STD-020C

Package Outline

Top View

Dimensions in mm

26.00

3.00

TYP.

35.00

R 1.00

1.80 1.20 0.40 1.80

1.20

0.40

3.00

TYP.

Package Outline

Top View

Dimensions in mm

26.00

3.00

TYP.

35.00

R 1.00

2.20 0.80 0.60 2.20

0.80

0.60

3.00

TYP.

Figure 6 Dimensions Mechanical

Figure 8 Footprint Dimensions Figure 9 Package Dimensions

Figure 7 Solder Proﬁle

5.2.1 LTE310SMT Dimensions

5.2.2 Suggested Solder Proﬁle

Top View - Dimensions in mm Top View - Dimensions in mm

5.2.3 LTE310SMT Suggested footprint

It is reccomended to use a non-solder-mask deﬁned

pad implementation.

5.2.4 LTE310SMT Pad Arrangement

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6 Operation

6.1 Powering ON/OFF

6.1.1 Powering ON

Power the Modem ON by pulling the ON_OFF signal (Pad I5) to ground for at least ﬁve (5) seconds, then release.

6.1.2 Powering OFF

There are two methods to to turn OFF the Modem under normal circumstances:

• Use the AT shutdown command (AT#SHDN)

• Pull ON_OFF signal (Pin 19) to ground for at least three (3) seconds, then release.

In both instances, power can be removed from the modem once the PWRMON signal goes low.

Under abnormal circumstances, an unconditional shutdown can be performed by holding the ON_OFF signal low

for at least 12 seconds.

6.2. Communicating with the Modem

The default conﬁguration of the modem has AT command ports available on the UART interface and the USB

interface.

6.2.1 UART Interface

The UART port operates at a the following default parameters:

• Baud Rate: 115.2 kbps

• Bits: 8

• Stop Bits: 1

• Parity: None

• Hardware Handshaking

6.2.2 USB Interface

The USB port instantiates two serial modem connections as AT command ports by default. USB drivers are

available from Telit or Janus.

6.3 Testing Communications

• The cellular module should always respond to the attention command with ‘OK’. Send:

AT<cr>1

Note 1. “<cr>” designates a carriage return character.

The module will response with ‘OK’.

• Verify the module model. Send:

AT+CGMM<cr>

The response should be the Telit module model number.

• Verify the ﬁrmware version. Send:

AT+CGMR<cr>

The response will be the Telit module’s current ﬁrmware.

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6 Operation continued

6.4 Cellular Network Communications

6.4.1 SIM Card

All LTE modems require a SIM card. The LTE310SMT v1.00 uses a 4FF ‘nano’ size SIM card.

6.4.2 Data Contexts - setting the APN

6.4.2.1 Checking the Data Contexts

Data connections require that the carrier’s Access Point Name (APN) be properly set in the data contexts using

the AT+CGDCONT command. In LTE modules, some contexts may be assigned for the carrier’s use. Normally the

device will get an APN from the network and auto-attach. In some cases, you may need to set a different APN.

The data contexts can be checked by entering the following command:

AT+CGDCONT?<cr>

The module will respond with the current data contex settings.

NOTE: A SIM card must be present to read the data contexts.

The default settings for the LTE Cat.M1 modems are as follows:

AT&T centric (#FWSWITCH=0):

+CGDCONT: 1,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 2,”IPV4V6”,”ims”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 3,”IPV4V6”,”sos”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1

+CGDCONT: 4,”IPV4V6”,”attm2mglobal”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 5,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 6,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

Context ID 1 is for the user’s data connection. It must be set to an appropriate APN.

Verizon (#FWSWITCH=1):

+CGDCONT: 1,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 2,”IPV4V6”,”vzwadmin”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 3,”IPV4V6”,”vzwinternet”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 4,”IPV4V6”,”vzwapp”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 5,”IPV4V6”,”vzwclass6”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 6,”IPV4V6”,”vzwiotts”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

Context ID 3 is for the user’s data connection; it is set to the default APN for Verizon.

Worldwide (#FWSWITCH=2) and Australia/Telstra (#FWSWITCH=3):

+CGDCONT: 1,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 2,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 3,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 4,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 5,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

+CGDCONT: 6,”IPV4V6”,””,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

Contact your carrier for the appropriate context to use.

6.4.2.2 Setting the Data Contexts

Cat.M1 devices may require a different APN (Access Point Name) than higher data rate modems (Cat.1, Cat.4,

etc.). Make sure you are using an acceptable APN or the device will not register on the network. For example, the

general Cat.M1 APN for AT&T is “m2m.attz.com”.

To set a data context with this APN, enter the following:

AT+CGDCONT=1,”IPV4V6”,”m2m.attz.com”<cr>

and wait for the “OK” response.

NOTE: Carrier services such as a staic IP address or VPN may require a specialized APN.

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6.4 Cellular Network Communications continued

6.4.3 Signal Strength

Signal channel can be checked as follows. Enter:

AT+CSQ<cr>

The default response format will contain two numbers:

+CSQ: 17,0

The ﬁrst number is the rssi (received signal strength indication) and the second is ber (bit error rate).

The rssi can be interpreted as follows:

10-14 Okay

15-20 Good

20+ Excellent.

Anything below 10 would be considered marginal.

A response of 99 indicates no signal.

6.4.4 Registration

Network registration can be checked as follows. Enter:

AT+CEREG?<cr>

A response of +CEREG:0,1 or +CEREG: 0,5 indicates the device is registered to the home network or roaming,

respectively.

If response is different than this, please refer to the Telit AT command reference document for more information

6.5 Data Communications

The modem incorporates a TCP/IP stack that can be used to directly send data using AT commands. Alternativly,

an external host can be used to make a PPP connection.

See the Telit ME910C1/MEx10G1 Quick Start Guide for further information

6.5.1 Data Communications - Using the Internal Stack

To send data using the internal stack, a data context must be activated.

Activate the context as follows:

AT&T centric (FWSWITCH=0):

Enter:

AT#SGACT=1,1<cr>

Verizon (FWSWITCH=1):

Enter:

AT#SGACT=3,1<cr>

If successful, the modem will respond with an IP address assigned by the carrier. Data can be sent to a host with

a socket dial command. Enter:

AT#SD=<connid>,0,80,<IPaddr>

where <connid> is the user data context and <IPaddr> is a text string (in quotes) containing a dotted IP address

or a DNS resovable host name.

The modem will respond with CONNECT and any data entererd thereafter will be sent to the connected host.

Enter the escape sequence:

+++

to suspend the connection.

See the Telit IP Easy User Guide and the Telit AT Commands Guide for more information.

6 Operation continued

Janus Remote Communications CellBridge LTE310SMT User manual

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