Telit Communications S p A DE921 Users Manual

DE921 Hardware User Guide

1vv0301183 Rev.1 – 2015-2-13

PRODUCT

DE921

DE910 Series Hardware User Guide

1vv0301183 Rev.1 – 2015-2-13

APPLICABILITY TABLE

DE910 Series Hardware User Guide

1vv0301183 Rev.1 – 2015-2-13

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

Notice

While reasonable efforts have been made to assure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this document has been carefully checked and is believed to be entirely reliable. However, no responsibility is assumed for inaccuracies or omissions. Telit reserves the right to make changes to any products described herein and reserves the right to revise this document and to make changes from time to time in content hereof with no obligation to notify any person of revisions or changes. Telit does not assume any liability arising out of the application or use of any product, software, or circuit described herein; neither does it convey license under its patent rights or the rights of others.

It is possible that this publication may contain references to, or information about Telit products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that Telit intends to announce such Telit products, programming, or services in your country.

Copyrights

This instruction manual and the Telit products described in this instruction manual may be, include or describe copyrighted Telit material, such as computer programs stored in semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit and its licensors certain exclusive rights for copyrighted material, including the exclusive right to copy, reproduce in any form, distribute and make derivative works of the copyrighted material. Accordingly, any copyrighted material of Telit and its licensors contained herein or in the Telit products described in this instruction manual may not be copied, reproduced, distributed, merged or modified in any manner without the express written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit, as arises by operation of law in the sale of a product.

Computer Software Copyrights

The Telit and 3rd Party supplied Software (SW) products described in this instruction manual may include copyrighted Telit and other 3rd Party supplied computer programs stored in semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form the copyrighted computer program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW computer programs contained in the Telit products described in this instruction manual may not be copied (reverse engineered) or reproduced in any manner without the express written permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit or other 3rd Party supplied SW, except for the normal non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.

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Usage and Disclosure Restrictions

License Agreements

The software described in this document is the property of Telit and its licensors. It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement.

Copyrighted Materials

Software and documentation are copyrighted materials. Making unauthorized copies is prohibited by law. No part of the software or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, without prior written permission of Telit

High Risk Materials

Components, units, or third-party products used in the product described herein are NOT fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control equipment in the following hazardous environments requiring fail-safe controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s) specifically disclaim any expressed or implied warranty of fitness for such High Risk Activities.

Trademarks

TELIT and the Stylized T Logo are registered in Trademark Office. All other product or service names are the property of their respective owners.

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Contents

1. Introduction ................................................. 8

1.1. Scope ..................................................... 8

1.2. Audience .................................................. 8

1.3. Contact Information, Support .............................. 8

1.4. Document Organization ..................................... 9

1.5. Text Conventions ......................................... 10

1.6. Related Documents ........................................ 10

2. General Product Description ................................. 11

2.1. Overview ................................................. 11

2.2. Product Specifications ................................... 12

2.3. RoHS Compliance .......................................... 13

3. DE921 Module Connections .................................... 14

3.1. Pin-Out .................................................. 14

3.1.1. BGA Pads Layout ............................................ 19

4. Hardware Commands ........................................... 20

4.1. Turning on the DE921 module .............................. 20

4.1.1. Initialization and Activation State ........................ 20

4.2. Turning off the DE921 module ............................. 22

4.2.1. Shutdown by Software Command ............................... 23

4.2.2. Hardware Shutdown .......................................... 23

4.3. Hardware Reset ........................................... 24

4.3.1. Hardware Reset ............................................. 24

4.4. Summary of Turning ON and OFF the Module ................. 25

5. Power Supply ................................................ 26

5.1. Power Supply Requirements ................................ 26

5.2. General Design Rules ..................................... 28

5.2.1. Electrical Design Guidelines ............................... 28

5.2.2. + 5V Input Source Power Supply Design Guidelines ........... 28

5.2.3. +12V Input Source Power Supply Design Guidelines ........... 29

5.2.4. Battery Source Power Supply Design Guidelines .............. 30

5.2.5. Thermal Design Guidelines .................................. 31

5.2.6. Power Supply PCB layout Guidelines ......................... 32

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6. Antenna ..................................................... 34

6.1. CDMA Antenna Requirements ................................ 34

6.1.1. CDMA antenna – PCB line Guidelines ......................... 35

6.1.2. PCB Guidelines in case of FCC certification ................ 36

6.1.3. CDMA Antenna – Installation Guidelines ..................... 38

6.2. GNSS Antenna Requirements ................................ 39

6.2.1. Combined GNSS Antenna ...................................... 39

6.2.2. Linear and Patch GNSS Antenna .............................. 39

6.2.3. The Design Considerations to enhanced GNSS performance ..... 39

6.2.4. GNSS Antenna – PCB Line Guidelines ......................... 42

6.2.5. GNSS Antenna – Installation Guidelines ..................... 42

7. USB Port .................................................... 43

8. Serial Port ................................................. 44

8.1. Modem Serial Port 1 ...................................... 45

8.2. Modem Serial Port 2 ...................................... 46

8.3. RS232 Level Translation .................................. 46

9. Audio Section Overview ...................................... 49

9.1. Electrical Characteristics ............................... 49

9.1.1. CODEC Example .............................................. 49

10. General Purpose I/O ......................................... 50

10.1. Logic Level Specification .............................. 51

10.2. Using a GPIO Pad as Input .............................. 51

10.3. Using a GPIO Pad as Output ............................. 52

10.4. Using the Temperature Monitor Function ................. 52

10.4.1. Short Description ........................................ 52

10.5. Indication of Network Service Availability ............. 53

10.6. VCOIN .................................................. 54

10.7. VCC_1V8 Power Output ................................... 55

11. ADC section ................................................. 56

11.1. ADC Converter .......................................... 56

11.1.1. Description .............................................. 56

11.1.2. Using ADC Converter ...................................... 56

12. Test Point .................................................. 57

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13. Mounting the Module on your Board ........................... 58

13.1. General ................................................ 58

13.2. Module Finishing & Dimensions .......................... 58

13.3. Recommended foot print for the application ............. 59

13.4. PCB Pad Design ......................................... 59

13.5. Recommendations for PCB Pad Dimensions (mm) ............ 60

13.6. Solder Paste ........................................... 61

13.6.1. Solder Reflow ............................................ 61

14. Packing System .............................................. 63

14.1. Reel ................................................... 63

14.1.1. Carrier Tape Detail ...................................... 63

14.1.2. Reel Detail .............................................. 63

14.1.3. Packaging Detail ......................................... 63

14.2. Moisture Sensibility ................................... 64

15. Application Design Guide .................................... 65

15.1. Download and Debug Port ................................ 65

16. Certifications and Conformity ............................... 66

17. Safety Recommendations ...................................... 69

18. Document History ............................................ 70

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1. Introduction

1.1. Scope

The aim of this document is the description of typical hardware solutions useful for developing a product with the Telit DE921 module.

1.2. Audience

This document is intended for Telit customers who are about to implement their applications using our DE921 modules.

1.3. Contact Information, Support

For general contact, technical support, to report documentation errors and to order manuals, contact Telit Technical Support Center (TTSC) at:

TS-EMEA@telit.com TS-NORTHAMERICA@telit.com TS-LATINAMERICA@telit.com TS-APAC@telit.com

Alternatively, use:

http://www.telit.com/en/products/technical-support-center/contact.php

For detailed information about where to buy the Telit modules or for recommendations on accessories and components visit:

http://www.telit.com

To register for product news and announcements or for product questions contact Telit Technical Support Center (TTSC).

Our aim is to make this guide as helpful as possible. Please keep us informed of comments and suggestions for improvements.

Telit appreciates feedback from the users of our information.

1.4. Document Organization

This document contains the following chapters:

Chapter 1: “Introduction” provides a scope for this document, target audience, contact and

support information, and text conventions.

Chapter 2: “General Product Description” gives an overview of the features of the product.

Chapter 3: “DE921 Module Connections” deals with the pin out configuration and layout.

Chapter 4: “Hardware Commands” How to operate the module via hardware.

Chapter 5: “Power supply” Power supply requirements and general design rules.

Chapter 6: “Antenna” The antenna connection and board layout design are the most important

parts in the full product design.

Chapter 7: “USB Port” The USB port on the Telit DE921 is the core of the interface between

the module and OEM hardware.

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Chapter 8: “Serial ports” Refers to the serial ports of the Telit DE921.

Chapter 9: “Audio Section overview” Refers to the audio blocks of the Base Band Chip of the

DE921 Telit Module.

Chapter 10: “General Purpose I/O” How the general purpose I/O pads can be configured.

Chapter 11: “ADC section” Deals with a converter.

Chapter 12: “Test Pont” Deals with Test Points.

Chapter 13: “Mounting the DE921 on the application board” Mechanical dimensions and

recommendations on how to mount the module on the user’s board.

Chapter 14: “Packing System” Deals with packing system.

Chapter 15: “Application Design Guide” Deals with the design of host system for download

or upgrade.

Chapter 16: “Certifications and Conformity ” provides some fundamental hints about the

conformity assessment that the final application might need.

Chapter 17: “Safety Recommendation” provides some safety recommendations that must be

followed by the customer in the design of the application that makes use of the Telit DE921.

1.5. Text Conventions

Danger – This information MUST be followed or catastrophic equipment failure or bodily injury may occur.

Caution or Warning – Alerts the user to important points about integrating the module. If these points are not followed, the module and end user equipment may fail or malfunction.

Tip or Information – Provides advice and suggestions that may be useful when integrating the module.

All dates are in ISO 8601 format, i.e. YYYY-MM-DD.

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1.6. Related Documents

 Digital Voice Interface Application Note, 80000NT10061A

 Product Description,

 Telit EVK2 User Guide, 1vv0300704

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2. General Product Description

2.1. Overview

The aim of this document is the description of typical hardware solutions useful for developing a product with the Telit DE921 module.

In this document all the basic functions of a mobile device will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced. Obviously this document cannot embrace all hardware solutions and products that may be designed. Avoiding the discussed wrong solutions must be considered as mandatory. While the suggested hardware configurations must not be considered mandatory, the information given must be used as a guide and a starting point for properly developing a product with the Telit DE921 module.

NOTE:

The integration of the CDMA 1xRTT/1xEV-DO Rev. A module within a user application must be done according to the design rules described in this manual.

The information presented in this document is believed to be accurate and reliable. However, no responsibility is assumed by Telit Communication S.p.A. for its use, such as any infringement of patents or other rights of third parties. No license is granted by implication or otherwise under any patent rights of Telit Communication S.p.A. other than for circuitry embodied in Telit products. This document is subject to change without notice.

CDMA

1xRTT

CDMA 1x

RTT

: 153.6 Kbps (full

-

duplex)

CDMA BC0:

Power class 3

(24

dBm

) for 1xRTT

,

a. CDMA

–40 ~ +70

°C (Full specificati

on

for

Designator A)

133

Ball-Grid

-

Array

interf

ace

Primary a

ntenna

DE910 Series Hardware User Guide

2.2. Product Specifications

DE921 Specifications

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Air Interface

Frequency Bands

Data Service

Location solution

Max. RF out power

Typical conducted sensitivity

  CDMA 1xEV-DO Rev. A

 800MHz/secondary 800MHz/1900MHz

  CDMA 1xEV-DO Rev. A: 3.1Mbps (F/L),

1.8Mbps (R/L)

gpsOne



Power class 3 (24dBm) for 1xEV-DO

 CDMA BC10: Power class 2 (24dBm) for 1xRTT,

Power class 2 (24dBm) for 1xEV-DO

 CDMA BC1: Power class 2 (24dBm) for 1xRTT,

Power class 2 (24dBm) for 1xEV-DO

 1xRTT: -106.5dBm  1xEV-DO: -107.5dBm

b. GNSS

 Acquisition sensitivity: -142dBm  Navigation sensitivity: -153.5dBm  Tracking sensitivity: -157.5dBm  TTFF: 29sec @ -130dBm

Device dimensions

Weight

Operating Temperature Range

Storage Temperature Range

Normal operating voltage range

IO voltage

Interface

Antenna

40mm(L) x 40mm(W) x 3.3mm(T)

10.2 g

–40 ~ +85°C (Restricted specification for Grade 3)

–40 ~ +85°C

3.4 ~ 4.2V

1.8V

  8 general I/O ports maximum including multi-

functional I/Os

 State LED output  2 A/D converter  Full RS232 CMOS UART: baud rate up to 4Mbps  Reserved two wires CMOS UART for debugging  USB 2.0: baud rate up to 480Mbps   GPS&GLONASS antenna

Regulatory:

TBD

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Audio

Message

Approvals

2.3. RoHS Compliance

As a part of Telit’s corporate policy of environmental protection, the DE921 complies with the RoHS (Restriction of Hazardous Substances) directive of the European Union (EU Directive 2011/65/EU).

PCM interface for Digital audio

SMS (MO/MT)

  Carrier: TBD

ACTIVE

Reserved

Leave Open

Reserved

Leave Open

Reserved

Leave Open

Reserved

Leave Open

Reserved

R

eserved

Reserved

DE910 Series Hardware User Guide

3. DE921 Module Connections

3.1. Pin-Out

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Pad no.

W18

X19

A3

B4

A5

B6

A7

B8

A9

B10

V16

S19

S20

D20

N21

R21

T21

V21

L1

N1

J1

M20

B1

C1

E1

R1

G1

K2

M2

P2

Function I/O VOLTAGE

ADC1 I 2.85V Ground

ADC0 I 2.85V Ground

Leave Open

ON/OFF I VBATT X Must be Used PU

Reserved Leave Open

PCM_FS O VCC_1V8 Leave Open

PCM_CLK O VCC_1V8 Leave Open

PCM_DOUT O VCC_1V8 Leave Open

PCM_DIN I VCC_1V8 Leave Open

Reserved I Leave Open

GND

Leave Open O VCC_1V8 Leave Open

GND

GNSS_ANT I 5V Leave Open

GND

GPIO8 I/O VCC_1V8 Leave Open PU

GPIO3 I/O VCC_1V8 Leave Open PD

GPIO5 I/O VCC_1V8 Leave Open PU

GPIO6 I/O VCC_1V8 Leave Open PU

GPIO7 I/O VCC_1V8 Leave Open PD

Ground

LOW

IF UNUSED PU/PD

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S2

U2

D2

F2

H2

S3

X3

A1

X1

A2

B2

W2

X2

L3

P3

V3

C3

H3

L6

P6

S6

V6

C6

H6

L8

P8

S8

V8

C8

L11

P11

S11

V11

C11

P14

S14

V14

GPIO9 I/O VCC_1V8 Leave Open PU

GPIO10 I/O VCC_1V8 Leave Open PU

GPIO1 I/O VCC_1V8 Leave Open PD

GPIO2 I/O VCC_1V8 Leave Open PD

GPIO4 I/O VCC_1V8 Leave Open PD

Reserved Leave Open

GND

Must be Used

Test Point 2

Test Point 3

Test Point 4

Test Point 5

Test Point 6

Must be Used

T

est Point 7

Must be Used

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C14

P16

S16

C16

V19

C19

F19

H19

A20

B20

W20

X20

A21

B21

W21

X21

B12

B14

B16

X17

W16

U20

T1

V1

W1

P20

F3

F6

F8

H8

F11

H11

L14

F14

H14

L16

F16

GND

Must be Used

I2C_CLK O VCC_1V8 Leave Open

I2C_SDA I/O VCC_1V8 Leave Open

LED O VCC_1V8 Leave Open

Reserved Leave Open

VBATT I VBATT Must be Used

VCOIN I/O

GND

PRIMARY_ANT I/O

GND

VCOIN Leave Open

Must be Used

2.85V Must be Used

Must be Used

VCC_1V8 O VCC_1V8 Leave Open

Reserved

Test Point 1

Leave Open

Must be Used

Reserved

Test Point 8

Leave Open

Must be Used

Reserved

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H16

L19

P19

W4

B18

X5

W6

X7

W8

X9

W10

K20

F20

H20

L21

C21

E21

G21

J21

A11

A13

X11

W12

X13

W14

X15

A15

A17

A19

Reserved

Reserved Leave Open

RESIN_N I VCC_1V8 X Leave Open PU

Reserved Leave Open

DTR1 I VCC_1V8 Leave Open

DCD1 O VCC_1V8 Leave Open

DSR1 O VCC_1V8 Leave Open

RI1 O VCC_1V8 Leave Open

CTS1 O VCC_1V8 Leave Open

RTS1 I VCC_1V8 Leave Open

RXD1 O VCC_1V8 Leave Open

TXD1 I VCC_1V8 Leave Open

RXD2 O VCC_1V8 Leave Open

TXD2 I VCC_1V8 Leave Open

Leave Open

USB_VBUS I USB_VBUS

USB_D_M I/O USB_VBUS

USB_D_P I/O USB_VBUS

Leave Open

WARNING:

Reserved pins must not be connected.

W16

VBATT

N1,J1,B1,E1,

A1,X1,A2,

S20 ON_OFF*

If not used should be connected to

If the flow control is not used it

If not used should be connected to

If not use

d should be connected to

V1

Main Antenna

ANT_GPS (If supported

If the GPS is not used it could be

F6,F8,H8,F11,H11,F14,

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NOTE:

Almost all pins not in use must be left disconnected. The only exceptions are the following pins:

PAD Signal

B2,W2,X2,L3,P3,V3,C3 ,H3,L6,P6,S6,V6,C6,H6 ,L8,P8,S8,V8,C8,L11,P 11,S11,V11,C11,P14,S1

GND 4,V14,C14,P16,S16,C16 ,V19,C19,F19,H19,A20, B20,W20,X20,A21,B21 ,W21,X21,T1,W1

B18 RESIN*

A19 USB_D+

A17 USB_D-

A15 VBUS

J21 TXD1

G21 RXD1

E21 RTS1

C21 CTS1

A13 TXD2

A11 RXD2

C1

by the product)

a Test Point

should be connected to GND

a Test Point

left unconnected

RTS must be connected to the GND (on the module side) if flow control is not used.

The above pins are also necessary to debug the application incorporating the module.

H14,F16

Test Point

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3.1.1. BGA Pads Layout

Top View

NOTE:

The pin defined as RES must be considered RESERVED and not connected on any pin in the application. The related area on the application has to be kept empty.

DE910 Series Hardware User Guide

4. Hardware Commands

4.1. Turning on the DE921 module

To turn on the DE921, the pad ON_OFF* must be tied low for at least 1 second and then released.

The maximum current that can be drained from the ON_OFF* pad is 0.1 mA.

A simple circuit to power on the module is illustrated below:

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4.1.1. Initialization and Activation State

Upon turning on DE921 module, the DE921 module is not active yet because the boot sequence of DE921 is still executing internally. It takes about 10 seconds to complete the initialization of the module internally.

For this reason, it would be useless to try to access DE921 during the Initialization state as below. The DE921 module needs at least 10 seconds after the PWRMON goes High to become operational by reaching the activation state.

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1vv0301183 Rev.1 – 2015-2-13

During the Initialization state, any kind of AT-command is not available. DTE must wait for the Activation state to communicate with DE921.

To check if the DE921 has powered on, the hardware line PWRMON must be monitored. When PWRMON goes high, the module has powered on.

NOTE:

Do not use any pull up resistor on the ON_OFF* line. It is pulled up internally. Using a pull up resistor may bring latch up problems on the DE921 power regulator and improper power on/off of the module. The line ON_OFF* must be connected only in open collector configuration.

NOTE:

In this document all the lines are inverted. Active low signals are labeled with a name that ends with "*" or with a bar over the name.

NOTE:

In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the DE921 module when the module is powered OFF or during an ON/OFF transition.

For example:

1. To drive the ON_OFF* pad with a totem pole output of a +3/5 V microcontroller

(uP_OUT1):

2. To drive the ON_OFF* pad directly with an ON/OFF button:

Telit Communications S p A DE921 Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual