Janus LTE910CF User Manual

LTE910CF v15.00 CAT1 Embedded Cellular Modem User Manual

Bulletin

JA03-UM-LTE910CF v15

Revision

Date

05 Nov 2020

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 ................................................................................................................................................................... 6-14

4.1 Inerface Voltage Selection ....................................................................................................................................... 6

4.2 Serial Interface......................................................................................................................................................7-8

4.3 Power Supply .......................................................................................................................................................... 9

4.4 Audio Interface ........................................................................................................................................................ 9

4.5 Pin-Out .................................................................................................................................................................. 10

4.6 VRTC ..................................................................................................................................................................... 11

4.7 GPIO .................................................................................................................................................................11-12

4.8 Analog to Digital Converter ................................................................................................................................... 12

4.9 Internal Interfaces .............................................................................................................................................12-14

4.10 RF Interface ........................................................................................................................................................... 14

4.11 SIM Card Interface ................................................................................................................................................ 14

4.12 Header Interface Mounting Options ...................................................................................................................... 14

4.13 Screw Mounting .................................................................................................................................................... 14

5 LTE910CF TECHNICAL SPECIFICATIONS ................................................................................................................... 15-19

5.1 Electrical Speciﬁcations ...................................................................................................................................15-18

5.2 Mechanical Speciﬁcations..................................................................................................................................... 19

6 OPERATION .................................................................................................................................................................. 20-24

6.1 Powering ON/OFF ................................................................................................................................................. 20

6.2 Communicating with the Modem .......................................................................................................................... 20

6.3 Testing Communications ....................................................................................................................................... 20

6.4 Cellular Network Communications ................................................................................................................... 21-22

6.5 Data Communications ......................................................................................................................................22-23

6.6 SMS ....................................................................................................................................................................... 23

6.7 GNSS ..................................................................................................................................................................... 23

6.8 Firmware Selection ................................................................................................................................................ 24

7 DESIGN CONSIDERATIONS .............................................................................................................................................. 24

7.1 Minimum required Modem Pin-Connection .......................................................................................................... 24

7.2 Debug .................................................................................................................................................................... 24

APPENDICES ...................................................................................................................................................................25-26

Approvals .............................................................................................................................................................. 25

Antenna Care and Replacement ........................................................................................................................... 25

Abbreviations ......................................................................................................................................................... 25

Ordering Information ............................................................................................................................................. 26

Revision History..................................................................................................................................................... 26

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. ConnorWinﬁeld 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.

LTE910CF Hardware User Manual JA03-UM-LTE910CF v15.00-Cat 1 Page 2 Rev: 01 Date: 11/05/20

1 APPLICABILITY TABLE

Product Part Number

LTE910CF v15.00

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 LE910C1-NF cellular module. Please refer to Telit’s website at www.telit.com for the latest information on the LE910C1 module family.

Telit LE910Cx AT Command Reference Telit LE910Cx Hardware Design Guide Telit IP Easy User Guide Telit Single SKU AT Command Application Note Telit LE910 / LE920 Digital Voice Interface Application Note

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3 OVERVIEW

3.1 Introduction

The User Manual for the 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 each Modem. The Modem differences are highlighted in this manual for design considerations for future model placement.

3.2 Preview

The 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 Cat1 / HSPA / UMTS

GNSS Functionality

• GPS, GLONASS, Beidou

UART

• 115200 bps default supporting all 7 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

.050

1.100

2.300

.100 TYP

.047 DIA (49)

PIN 26PIN 49

(TOP VIEW)

PIN 1 PIN 25

.100 TYP

2.400

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3 OVERVIEW continued

TELIT

LE910C1-NF

TELIT

LE910C1-NF

SIM CARD

Switching Regulator

LTE910CF V15.00

1.8V GPIO1/Cellular LED

USB

VSel UART (AT)

VSel UART (TRACE)

VSel GPIO (3-7)

5 VDC

ENABLE

1.8v PWRMON

RESET

ON/OFF

1.8V GPIO2/User LED

1.8v DVI

LDO

2.85v

Translator

1.8v UART (AT)

1.8v UART (TRACE)

1.8v PWRMON

VSel PWRMON

1.8v UART (AT)

1.8v UART (TRACE)

1.8v PWRMON

Enable

1.8v GPIO (3-7)

1.8v GPIO9

1.8v GPIO10

Reference

2.85v

Select

VSel VAUX

VSel

3.3 Features

LTE910CF v15.00

Multi-Band Support

• LTE Band 1900 (B2), 1700 (B4), 850 (B5), 700 (B12/B13/B14),

AWS-3 (B66), 600 (B71)

• UMTS/HSPA+ Band 1900 (B2), 1700 (B4), 850 (B5),

Output Power

• Class 3 (0.2W) @ LTE

• Class 3 (0.25W) @ WCDMA

Data

• LTE: DL: Up to 10Mbps, UL: Up to 5Mbps

• HSPA: DL: Up to 42Mbps, UL: Up to 5.76 Mbps

3.4 Block Diagram

Features

• Control via standard and extended AT command set

• SIM application Tool Kits 3GPP TS 51.014

• SIM access proﬁle

• IP stack with TCP/UDP protocol support

• SMS Support

• Through hole for screw mount

• Dimensions: 2.5” x 1.4” x 0.325”

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

• Internal Switching Regulator:

Input Voltage Range: 4.75 to 5.25Vdc (5Vdc nominal) Supply disable via terminal input pin

• Variable logic level (UART/GPIO)

Adjustable from 1.8 - 5.0Vdc Defaults to 2.85v

• SIM Card:

Standard locking SIM card socket (2FF ‘mini’)

• GNSS (Globa Navigation Sattelite System) includes

GPS, GLONASS and Beidou

• Cellular, Rx Diversity, MIMO DL 2x2 and GPS

antenna connections via Hirose U.FL miniature RF connectors

LTE910CF Hardware User Manual JA03-UM-LTE910CF v15.00-Cat 1 Page 5 Rev: 01 Date: 11/05/20

Figure 1 LTE910CF v15.00 Block Diagram

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 3 party vendors.

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

VZW.FOTA-Services@VerizonWireless.com

4 INTERFACES

4.1 Interface Voltage Selection

The LTE910CF is equipped with a variable voltage interface solution. This allows the user to match the device to the system’s level without extra hardware. Once a voltage has been injected, the unit will swap to the chosen voltage immediately for the affected I/O.

The VL_IN signal can be applied or changed to a different level within the 1.5V to 5.5V operational range after the unit is powered, but once applied the VL_IN voltage should not be removed unless the unit is turned off.

If no external reverence is applied to the VL_IN pin, the I/O interface will default to a 2.85V level. In this case the VL_IN pin 30 should be pulled low.

Truth Table:

VL_IN: Ground 1.5v - 5.5v I/O level: 2.85v 1.5v - 5.5v

Affected I/O:

1. UART (AT, TRACE)

2. GPIO (3-7)

3. VAUX*

4. GNSS Antenna Bias Voltage

*VAUX Adjustment allows feedback as well as legacy access if previously utilizing a plug in implementation with VAUX as the reference.

Note to pay attention of these changes so there are no adverse effects on a previous Modem implementation.

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4 INTERFACES

4.2 Serial Interface

4.2.1 UART Serial Port

The serial interface is a CMOS level UART. Default Communications settings for this port are as follows:

• Baud Rate: 115.2 kbps

• Bits: 8

• Stop Bits: 1

• Parity: None

• Hardware Handshaking: Yes

Baud rate can be controlled with the AT+IPR command. Default setting is 115200 baud.

Note: If you are not using hardware handshaking, RTS must be connected to GROUND for proper communications when ﬂow control is not used.

4.2.1.1 UART Level Translation

The electrical limits for the UART are listed in the electrical characteristics section. Please be aware of these limits, as operating outside of them may damage the unit. If the limits must be exceeded, level translation can be used. An example of basic translation for RXD/TXD only is found below.

Although an external source for the level translation can be used, VAUX can be used as the reference instead.

Figure 2 UART Level Translation Example

However, because some Modems require AT commands to control VAUX, PWRMON may be used as an enable to an external reference. Do not use PWRMON directly as the reference.

Note that the UART Level Translation example remains in this guide for legacy purposes when designing a system for multiple Modems. The LTE910CF is equipped with interface voltage adjustment, negating the need for translation.

4.2.2 USB Port

The Modems that are USB ready include an integrated universal serial bus (USB) transceiver, compliant with USB

2.0 speciﬁcations. High data rates for the USB enabled Modems are only available over the USB interface, as the UART has a maximum baud rate of <1Mbps. 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.

Note: You must implement the USB interface in order to locally update module ﬁrmware.

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4 Interfaces continued

4.2.2 USB Port continued

4.2.2.1 USB Connection Diagram

When VBUS_ENABLE is HIGH the VBUS 5.0v signal will be passed to USB_VBUS, (pin 29) turning the USB ON.

Figure 3 USB Connection Diagram

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