Telit Wireless Solutions CC864-DUAL Hardware User's Manual

CC864-DUAL Hardware User Guide

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Notice

OEM integrators and installers are instructed that the phrase. This device contains

transmitter FCC ID:

must be placed on the outside of the host.

Warning: Exposure to Radio Frequency Radiation The radiated output

power of this device is far below the FCC radio frequency exposure

limits. Nevertheless, the device should be used in such a manner that

the potential for human contact during normal operation is minimized.

In order to avoid the possibility of exceeding the FCC radio

frequency exposure limits, human proximity to the antenna should

not be less than 20cm during normal operation. The gain of the

antenna for Cellular band must not exceed

dBi.

The gain of the antenna for PCS band must not exceed -3

dBi.

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Disclaimer

The information contained in this document is the proprietary information of Telit

Communications S.p.A. and its affiliates (“TELIT”).

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 Telit, is strictly prohibited.

Telit makes every effort to ensure the quality of the information it makes available.

Notwithstanding the foregoing, Telit 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.

Telit 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.

Telit 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 document.

Printed in the US

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Contents

1. Introduction ................................................................................................................... 6

1.1. Scope ....................................................................................................................... 6

1.2. Audience .................................................................................................................. 6

1.3. Contact Information, Support ................................................................................... 6

1.4. Product Overview ..................................................................................................... 6

1.4.1. General Specifications .................................................................................................. 6

1.4.2. Receiver Specifications ................................................................................................. 7

1.4.3. Transmitter Specifications ............................................................................................. 7

1.4.4. gpsOne Receiver Specifications ................................................................................... 7

1.5. Safety Recommendations ........................................................................................ 7

1.5.1. Local regulations ........................................................................................................... 7

1.5.2. Wiring and Installation ................................................................................................... 8

1.5.3. Electrostatic Discharge .................................................................................................. 8

1.5.4. R-UIM Card ................................................................................................................... 8

1.5.5. Antennas ....................................................................................................................... 8

1.5.6. Disassembly .................................................................................................................. 8

1.6. Document Organization ........................................................................................... 8

1.7. Text Conventions ..................................................................................................... 9

1.8. Related Documents .................................................................................................. 9

1.9. Document History ..................................................................................................... 9

2. Mechanical Specifications ......................................................................................... 10

2.1. Module Dimensions ................................................................................................ 10

2.2. Interface Connector Specifications ......................................................................... 11

2.3. RF Connector Specifications .................................................................................. 12

2.4. Mounting ................................................................................................................ 13

3. Hardware Interface Description ................................................................................. 14

3.1. Overview ................................................................................................................ 14

3.2. Functions for Turning On and Off the Module ........................................................ 15

3.2.1. Turning On the CC864-Dual Module ........................................................................... 15

3.2.2. Turning Off the CC864-Dual Module ........................................................................... 16

3.2.2.1. Hardware Shutdown ............................................................................................. 16

3.2.2.2. Software Shutdown .............................................................................................. 16

3.2.3. Hardware Reset .......................................................................................................... 16

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3.3. Power Supply ......................................................................................................... 17

3.3.1. +5V Input Source Power Supply Design Guidelines ................................................... 18

3.3.2. +12V Input Source Power Supply Design Guidelines ................................................. 18

3.3.3. Battery Source Power Supply Design Guidelines ....................................................... 19

3.3.4. Battery Charge Control Circuitry Design Guideline ..................................................... 20

3.3.4.1. Trickle Charging ................................................................................................... 21

3.3.4.2. Constant Current Charging .................................................................................. 22

3.3.4.3. Constant Voltage Charging .................................................................................. 22

3.3.4.4. Pulse Charging ..................................................................................................... 22

3.3.5. Thermal Design Guidelines ......................................................................................... 23

3.3.6. Power Supply PCB Layout Guidelines ........................................................................ 23

3.4. Antenna Requirements .......................................................................................... 25

3.4.1. Antenna Installation Guideline ..................................................................................... 25

3.5. Logic level Specification ......................................................................................... 25

3.6. UART1 - Serial Interfaces ...................................................................................... 26

3.6.1. RS232C Interface and Level Translation .................................................................... 27

3.6.2. 5V UART Level Translation ......................................................................................... 28

3.7. External R-UIM Interface ........................................................................................ 29

3.7.1. R-UIM Design Guidelines ............................................................................................ 29

3.8. USB Interface ......................................................................................................... 30

3.9. Audio Interface ....................................................................................................... 30

3.9.1. General Design Rules ................................................................................................. 31

3.9.2. Handset Interface ........................................................................................................ 31

3.9.3. Headset Interface ........................................................................................................ 32

3.9.4. Car Kit Speakerphone Interface .................................................................................. 33

3.10. I2C Bus Interface ................................................................................................ 35

3.11. ADC/DAC Interface ............................................................................................. 35

3.11.1. ADC Converter ........................................................................................................ 35

3.11.1.1. Description ........................................................................................................... 35

3.11.1.2. Using ADC Converter ........................................................................................... 36

3.11.2. DAC Converter ........................................................................................................ 36

3.11.2.1. Description ........................................................................................................... 36

3.11.2.2. Enabling the DAC ................................................................................................. 36

3.11.2.3. Low Pass Filter Example ...................................................................................... 37

3.12. General Purpose I/O ........................................................................................... 37

3.12.1. Using a GPIO pin as Input ....................................................................................... 38

3.12.2. Using a GPIO pin as Output .................................................................................... 38

3.12.3. TGPIO_03/AUDIO MUTE ........................................................................................ 38

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3.12.4. TGPIO_04/RF Transmission Control ....................................................................... 38

3.12.5. TGPIO_05/RFTXMON ............................................................................................. 38

3.12.6. TGPIO_06/ALARM .................................................................................................. 39

3.12.7. TGPIO_07/BUZZER ................................................................................................ 39

3.12.8. TGPIO_08/POWER_SAVING ................................................................................. 40

3.12.9. TGPIO_11/VIBRATOR ............................................................................................ 40

3.12.10. TGPIO_12/CALL_KEY ............................................................................................ 40

3.12.11. TGPIO_13/ACTIVE .................................................................................................. 40

3.13. Miscellaneous Interface Signals ......................................................................... 41

3.13.1. VAUX1 ..................................................................................................................... 41

3.13.2. VRTC ....................................................................................................................... 41

3.13.3. STAT_LED ............................................................................................................... 42

3.13.4. PWRMON ................................................................................................................ 42

3.13.5. AXE .......................................................................................................................... 42

4. Development and Testing .......................................................................................... 44

5. Acronyms and Abbreviations .................................................................................... 45

6. Appendix: Pin Allocation ........................................................................................... 46

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1. Introduction

1.1. Scope

This document describes hardware solutions you can use to develop a product

containing the Telit CC864-Dual module, as follows:

• Describing the basic functions of the module

• Suggesting a proper hardware solution for each function

• Describing the wrong solutions and most common errors to be avoided

This document is not intended to provide an overall description of all hardware

solutions and all the products that may be designed.

The solutions suggested serve as a guide or starting point for you to be able to

correctly develop a product with the Telit CC864-Dual module.

However, avoiding the wrong solutions and most common errors described here

should be regarded as mandatory.

1.2. Audience

This manual is intended for hardware developers who design products that integrate

the CC864-DUAL module.

1.3. Contact Information, Support

For detailed information about where you can 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's Technical Support Center (TTSC).

1.4. Product Overview

The CC864-Dual module is a CDMA-1XRTT wireless module designed to have the

same form, fit and function as its GSM/GPRS counterpart product family, the GC864-

Dual.

This enables integrators and developers to design their applications once and take

advantage of the global coverage and service flexibility allowed by the combination of

the most prevalent cellular technologies worldwide.

With its ultra-compact design and extended operating temperature range, the Telit

CC864-Dual module is the perfect platform for m2m applications, mobile data and

computing devices. It also incorporates gpsOne capability for applications in mobile

environments such as telematics, personal and asset tracking.

1.4.1. General Specifications

Parameter Description

External access

Code division multiple access

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CDMA protocol

CDMA2000 1x Rel A and Rel B

Data Rate

153.6 Kb/s (full-duplex)

GPS

SGPS / standalone

Vocoder

EVRC, 13kQCELP, 4GV

Operating temperature

-30° ~ +80°

1.4.2. Receiver Specifications

Parameters Descriptions

Frequency range

Cellular: 869~894 MHz

PCS: 1930~1990 MHz

Channel number

Cellular: 832

PCS: 1200

Sensitivity

Better than -104 dBm

Input dynamic range

-25dBm ~ -104 dBm

1.4.3. Transmitter Specifications

Parameters Descriptions

Frequency range

Cellular: 824~849 MHz

PCS: 1850~1910 MHz

Channel number

Cellular: 832

PCS: 1200

Power class

Cellular: Class III

PCS: Class II

Power range

0.2 W (23 dBm) ~ 0.63 W (28 dBm)

Nominal power

0.27 W (24.31 dBm)

1.4.4. gpsOne Receiver Specifications

Parameters Descriptions

Frequency range

L1, 1575.42 MHz

Receiver sensitivity

-151 dBm

1.5. Safety Recommendations

1.5.1. Local regulations

Make sure that the use of this product is allowed in the country and in the

environment required.

The use of this product may be dangerous and thus must be avoided where:

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• It can interface with other electronic devices in environments such as

hospitals, airports, and so on.

• There is risk of explosion such as in the proximity of gasoline, oil refineries,

and so on.

You are responsible to enforce country and specific environment regulations on the

product. For further details refer to Chapter 1.7 for related documents.

1.5.2. Wiring and Installation

Always follow the instructions of this guide when wiring the product.

The product must be supplied with a stabilized voltage source, and the wiring must

conform to security and fire prevention regulations.

The installation of the external components of the module must be handled with care

in order to ensure the proper functioning of the product.

1.5.3. Electrostatic Discharge

The product must be handled with care, avoiding any contact with the pins because

electrostatic discharge can damage the product.

1.5.4. R-UIM Card

The R-UIM card must also be handled with care, always following the instructions for

its use.

Do not insert or remove the R-UIM when the product is in power saving mode.

1.5.5. Antennas

Every module must be equipped with a proper antenna with specific characteristics.

The antenna must be installed with care in order to avoid any interference with other

electronic devices, and it must also have a minimum distance of 20 cm from the body.

In case this requirement cannot be satisfied, the system integrator must assess the

final product against the applicable SAR regulations.

1.5.6. Disassembly

Do not disassemble the product.

Any evidence of tampering will void the warranty.

1.6. Document Organization

This manual contains the following chapters:

“Chapter 1: Introduction”

provides a scope for this manual, target audience, contact

and support information, and text conventions.

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“Chapter 2: Mechanical Specifications” contains information on the dimensions of the

module, the interface connector and the RF connector, and on how to include the

module into external applications.

“Chapter 3: Hardware Interface Description” describes the hardware interfaces of the

product and provides guidelines for using the module in various applications.

“Chapter 4: Development and Testing”

provides information on how to connect the

module to the Telit Evaluation Kit (EVK).

“Chapter 5: Acronyms and Abbreviations”

provides definition for all the acronyms and

abbreviations used in this guide.

“Appendix: Pin Allocation”

specifies the allocation of the pins on the connector that is

used for connecting the unit with external applications.

1.7. 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.

1.8. Related Documents

The following documents are related to this user guide:

• CC864-DUAL Product Description – (Doc No)

• CC864-DUAL Software Description – (Doc No)

1.9. Document History

Doc rev # Date Changes Location in

Guide

0.3 01.03.2008 First version for Peer review

0.4 04.03.2008 Updates after review

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2. Mechanical Specifications

2.1. Module Dimensions

The CC864-DUAL overall dimensions are:

Length:

36.25 mm

Width:

30.00 mm*

Thickness:

4.65 mm*

*) Excluding solder pads.

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2.2. Interface Connector Specifications

The CC864-Dual module is equipped with a Molex 80-pin board-to-board connector

and P/N 0539490878 (male).

The mating part is Molex P/N 0541500878 (female).

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2.3. RF Connector Specifications

The CC864-Dual module is equipped with a Murata GSC type 50 Ohm RF connector,

and P/N MM9329-2700.

The suitable counterpart is Murata MXTK92 type or MXTK88 type connector.

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Mounting

The figure below shows the position of the Molex board-to-board connector and pin 1.

Tip: It is highly recommended to maintain a 1.5mm clearance from all wireless

modems to any components, including around the solder tabs.

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3. Hardware Interface Description

3.1. Overview

The CC864-Dual module has the following main interface function blocks:

• UART1 (used for AT commands)

• USB (used for diagnostic monitoring)

• R-UIM (UART2)

• GPIOs

• Audio (includes Analog I/O audio codecs and PCM interface)

• JTAG

• Miscellaneous pins (including I

2

C)

To

Antenna

QSC 6055

80 Pin Modem Interface Connector

RF Interface

US-PCS

Duplexer

RX

Filter

US

PCS

LNA

PAM

TX

Filter

Cellular

Duplexer

RX

Filter

Cellular

LNA

PAM

TX

Filter

Triplexer

USB

UART1

RUIM

GPIOs

CODEC

JTAG

Misc

To GPS

Dedicated

Antenna

ROM

RAM

CDMA Rx GPS

CDMA Tx

IIC

GPS

filter

LNA

GPS

Switch

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3.2. Functions for Turning On and Off the Module

3.2.1. Turning On the CC864-Dual Module

To turn on the module the ON/OFF Pin must be tied for at least one second, and

then released.

A Few Examples

1) Let's assume you need to drive the ON_OFF pin with a totem pole output of a +3/5

V microcontroller (uP_OUT1):

1s

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2) Let's assume you need to drive the ON_OFF pin directly with an ON/OFF

button:

3.2.2. Turning Off the CC864-Dual Module

You can turn off the device with either a software command or a hardware shutdown

circuit.

When the device is shut down either way, it issues to the network a detach request

with the information that the device is not reachable any more.

Warning: Never disconnect power before the power off procedure is completed. If

you do, this may cause severe damage the module primarily due to the possibility of

memory corruption that renders the module inoperable.

3.2.2.1. Hardware Shutdown

To turn off the CC864-Dual module the ON/OFF Pin must be tied for at least one

second, and then released.

The same circuitry and timing as for power on must be used for be used for powering

off the module.

The device shuts down after you release the ON_OFF Pin.

3.2.2.2. Software Shutdown

Please refer the “Software User Guide” for information on how to shut down the

module using AT-commands.

3.2.3. Hardware Reset

To perform hardware reset and reboot the module, the RESET pin must be tied low

for at least 200 milliseconds, and then released.

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The following figure shows a sample circuit to accomplish this operation:

TIP: A hardware reset circuit should be always implemented on the host board but

the host should use it as an emergency reset procedure only.

Example

Let's assume you need to drive the RESET# pad with a totem pole output of a +3/5 V

microcontroller (uP_OUT2):

3.3. Power Supply

The electrical design of the power supply strongly depends on the power source from

which the power is drained. We will discuss the following three common categories:

• +5V input source supply (typically PC internal regulator output)

• +12V input source supply (typically automotive)

• Battery source supply

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3.3.1. +5V Input Source Power Supply Design Guidelines

The desired output for the power supply is 3.8V, hence there’s not a big difference

between the input source and the desired output and a linear regulator can be used. .

When using a linear regulator, a proper heat sink may be required in order to

dissipate the heat.

A bypass low ESR capacitor of adequate capacity must be provided in order to cut

the current absorption peaks close to the CC864-Dual module, a 100µF tantalum (or

equivalent) capacitor is suited for this purpose.

Make sure the low ESR capacitor on the power supply output (usually a tantalum) is

rated at least 10V.

A protection diode should be inserted close to the power input, in order to protect the

module from power polarity inversion.

A typical example of a linear regulator with 5V input is:

3.3.2. +12V Input Source Power Supply Design Guidelines

The desired output for the power supply is 3.8V, and due to the large difference

between the input voltage and the desired output, a linear regulator is not well suited

and should not be used. A switching power supply is preferred because of its better

efficiency with the 2A peak current load drawn by the CC864-Dual module.

When using a switching regulator, a 500 KHz or more switching frequency regulator

is preferable because of its smaller inductor size and faster transient response. This

allows the regulator to respond quickly to current peaks.

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In any case the frequency and switching design selection is related to the application

to be developed due to the fact the switching frequency could also generate EMC

interferences and the application must also take this into account.

For a car PB battery the input voltage can rise up to about 16V and when choosing

components, all components in the power supply must withstand this voltage.

Power supplies for automotive use are complicated and have to take a number of

issues into account, such as: over voltage, reverse polarity, cranking, load dump

booster batteries, forced charging etc

A bypass low ESR capacitor of adequate capacity must be provided in order to cut

the current absorption peaks; a 100µF tantalum (or equivalent) capacitor is suitable

for this purpose.

Make sure the low ESR capacitor on the power supply output (usually a tantalum) is

rated at least 10V.

For car applications a spike protection diode must be inserted close to the power

input, in order to clean the supply from spikes and a specific automotive grade

regulator is recommended.

A protection diode (which can be the same diode as in spike protection) must be

inserted close to the power input in order to save the CC864-Dual module from

power polarity inversion.

A typical example of a switching regulator with 12V input is:

3.3.3. Battery Source Power Supply Design Guidelines

The desired nominal output for the power supply is 3.8V and the maximum voltage

allowed is 4.2V, so that a single 3.7V lithium-ion cell battery type is ideal to supply

the power to the module.

Three regular battery cells (Ni/Cd or Ni/MH 3.6V nom. battery types or 4V PB types)

must not be used directly because their maximum voltage can rise over the absolute

maximum voltage for the CC864-Dual module and damage it.

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