Telit Communications S p A CC864-DUAL DUAL BAND CDMA/GPS Module User Manual User MAnual

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CC864-Dual Hardware user manual

80pppSTzzzzza Rev. 0 - 12-Nov-07

Telit CC864-Dual Hardware user manual

80pppSTzzzzza Rev. 0 , 12-Nov-07

Contents

1. Overview ................................................................................................................................................... 4

1.1. General Specifications........................................................................................................................ 4

1.2. Receiver Specifications ...................................................................................................................... 4

1.3. Transmitter Specifications .................................................................................................................. 5

1.4. gpsOne Receiver Specifications ........................................................................................................ 5

2. Mechanical Dimensions .......................................................................................................................... 5

3. Hardware Commands .............................................................................................................................. 6

3.1. Turning ON the CC864-Dual .............................................................................................................. 6

3.2. Turning OFF the CC864-Dual ............................................................................................................ 6

3.3. Hardware shutdown ........................................................................................................................... 6

3.4. Hardware RESET Reboot .................................................................................................................. 7

4. Power Supply ........................................................................................................................................... 7

4.1. Power Supply Requirements .............................................................................................................. 7

4.2. Electrical Design Rules ...................................................................................................................... 8

4.2.1. +5V Input Source Power Supply Design Guidelines .......................................................................... 8

4.2.2. +12V Input Source Power Supply Design Guidelines ........................................................................ 8

4.2.3. Battery Source Power Supply Design Guidelines .............................................................................. 9

4.3. Battery Charge control Circuitry Design Guideline .......................................................................... 10

4.3.1. Trickle charging ................................................................................................................................. 11

4.3.2. Constant current charging ................................................................................................................ 12

4.3.3. Constant voltage charging ................................................................................................................ 12

4.3.4. Pulse charging .................................................................................................................................. 12

4.4. Thermal Design Guidelines .............................................................................................................. 13

4.5. Power Supply PCB layout Guidelines .............................................................................................. 14

5. Antenna ................................................................................................................................................... 15

5.1. Antenna Requirements ..................................................................................................................... 15

5.2. Antenna Connector .......................................................................................................................... 15

5.3. Antenna installation Guidelines ........................................................................................................ 15

6. PINs allocation ....................................................................................................................................... 16

7. Interface Description ............................................................................................................................. 20

7.1. UART1(RS232 level translation) ...................................................................................................... 20

7.1.1. 5V UART level translation ................................................................................................................ 23

7.2. R-UIM Holder ................................................................................................................................... 23

7.2.1. R-UIM Design Guidelines ................................................................................................................. 24

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7.3. USB Port .......................................................................................................................................... 24

7.4. IIC Bus Interface ............................................................................................................................... 25

7.5. ADC/DAC signals ............................................................................................................................. 25

7.6. General Purpose I/O ........................................................................................................................ 26

7.6.1. Logic level specifications .................................................................................................................. 27

7.6.2. Using a GPIO pad as Input .............................................................................................................. 27

7.6.3. Using a GPIO pad as Output............................................................................................................ 28

7.6.4. TGPIO_03/AUDIOMUTE.................................................................................................................. 28

7.6.5. TGPIO_04/CONVERSATION ........................................................................................................... 28

7.6.6. TGPIO_05/RFTXMON ..................................................................................................................... 28

7.6.7. TGPIO_06/ALARM ........................................................................................................................... 29

7.6.8. TGPIO_07/BUZZER ......................................................................................................................... 29

7.6.9. TGPIO_08/POWER_SAVING .......................................................................................................... 29

7.6.10. TGPIO_11/VIBRATOR .............................................................................................................. 30

7.6.11. TGPIO_12/CALL_KEY ............................................................................................................. 30

7.6.12. TGPIO_13/ACTIVE .................................................................................................................. 30

8. Audio Section ......................................................................................................................................... 31

8.1. Differential Audio Interface design ................................................................................................... 31

8.1.1. General Design Rules ...................................................................................................................... 31

8.1.2. Microphone design ........................................................................................................................... 32

8.2. Receiver design ................................................................................................................................ 32

8.3. Speaker design ................................................................................................................................. 33

8.4. Single-ended Audio Interface design (Hand-free or earphone design) ............................................ 33

8.5. Car kit speakerphone design ........................................................................................................... 34

8.6. PCM Interface .................................................................................................................................. 34

9. Miscellaneous signals ........................................................................................................................... 35

9.1. VAUX1 .............................................................................................................................................. 35

9.2. VRTC ................................................................................................................................................ 36

9.3. STAT_LED ........................................................................................................................................ 36

9.4. PWRMON ......................................................................................................................................... 37

9.5. AUDIO_AUX ..................................................................................................................................... 37

10. Safety Recommendations ............................................................................................................. 38

11. Reference ........................................................................................................................................ 39

12. Document Change Log .................................................................................................................. 39

Notice

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

transmitter FCC ID: RI7CC864-DUAL 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-2.000 dBi.

The gain of the antenna for PCS band must not exceed -3.00000dBi.

Telit CC864-Dual Hardware user manual

80pppSTzzzzza Rev. 0 , 12-Nov-07

1. Overview

The aim of this document is the description of some hardware solutions useful for developing a

product with the Telit CC864-Dual module.

In this document all the basic functions of a mobile phone 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 are to be avoided. Obviously this document can not embrace the whole hardware

solutions and products that may be designed. The wrong solutions to be avoided shall be

considered as mandatory, while the suggested hardware configuration shall not be considered

mandatory, instead the information given shall be used as a guide and a starting point for properly

developing your product with Telit CC864-Dual module. For further hardware details that may not

be explained in this document.

1.1. General Specifications

Parameters Descriptions

External Access Code Division Multiple Access

CDMA Protocol IS-95A/B, IS-98A, IS-126, IS-637A, IS-707, IS-2000

Data Rate 153.6Kbps(Full-duplex)

GPS SGPS/Standalone

Vocoder EVRC, 13kQCELP

Number of Channel 832 for Cellular, 1200 for PCS

Operating Temperature -30℃ ~ +80℃

1.2. Receiver Specifications

Parameters Descriptions

Frequency Range 869~894Mhz, 1930~1990Mhz

Sensitivity Below -104dBm

Input Dynamic Range -25dBm ~ -104dBm

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1.3. Transmitter Specifications

Parameters Descriptions

Frequency Range 824~849Mhz, 1850~1910Mhz

Power Class Class Ⅲ for Cellular, Class Ⅱ for PCS

Power Range 0.2W ~ 1.0W

Nominal Power 0.27W(24.31dBm)

1.4. gpsOne Receiver Specifications

Parameters Descriptions

Frequency Range L1, 1575.42Mhz

C/A Code 1.023Mhz Chip Rate

Receiver Sensitivity -152dBm

2. Mechanical Dimensions

The Telit CC864-Dual module overall dimensions are:

y Length : 36.25㎜

y Width : 30㎜

y Thickness : 4.8㎜

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3. Hardware Commands

3.1. Turning ON the CC864-Dual

To turn ON the CC864-DUAL the pad ON/OFF must be tied for at least 1 second and then released.

3.2. Turning OFF the CC864-Dual

The turning off of the device can be done in two ways:

. by software command

. by hardware shutdown

When the device is shut down by software command or by hardware shutdown, it issues to the

network a detach request that informs the network that the device will not be reachable any more.

3.3. Hardware shutdown

To turn OFF the CC864-Dual the pad ON/OFF must be tied for at least 1 second and released. The

same circuitry and timing for the power on shall be used. The device shuts down after the release

of the ON/OFF pad.

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3.4. Hardware RESET Reboot

To unconditionally Reboot the CC864-Dual, the pad RESET must be tied low for at least 200

milliseconds and the released.

A simple circuit to do it is :

4. Power Supply

The power supply circuitry and board layout are a very important part in the full product design and

they strongly reflect on the product overall performance, hence read carefully the requirements and

the guidelines for a proper design.

4.1. Power Supply Requirements

y Nominal Supply Voltage : 3.8V

y Max Supply Voltage : 4.2V

y Supply voltage range : 3.6V ~ 4.2V

y Max Peak current consumption(impulsive) : 1A

y Max Average current consumption during CDMA transmission : 700mA

y Average current during Power saving(Sleep mode) : ≤ 2mA

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The current peaks can be as high as about 1A. Therefore the power supply has to be designed in

order to withstand with these current peaks without big voltage drops; this means that both the

electrical design and the board layout must be designed for this current flow.

If the voltage goes under 3.3V, the module will be shut down automatically.

4.2. Electrical Design Rules

The electrical design of the power supply depends strongly from the power source where this

power is drained. We will distinguish them into three categories :

y +5V input(typically PC internal regulator output)

y +12V input(typically automotive)

y Battery

4.2.1. +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. A switching power supply

will not be suited because of the low drop out requirements.

When using a linear regulator, a proper heat sink shall be provided in order to dissipate the power

generated.

A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current

absorption peaks close to the CC864-Dual, a 100µF tantalum capacitor is usually suited.

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

least 10V.

A protection diode should be inserted close to the power input, in order to save the CC864-DUAL

from power polarity inversion.

4.2.2. +12V Input Source Power Supply Design Guidelines

The desired output for the power supply is 3.8V, hence due to the big difference between the input

source and the desired output, a linear regulator is not suited and shall not be used. A switching

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power supply will be preferable because of its better efficiency with the 1A peak current load

represented by the CC864-Dual.

When using a switching to the regulator, a 500㎑ or more switching frequency regulator is

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

regulator to respond quickly to the current peaks absorption.

For car PB battery the input voltage can rise up to 15.8V and this should be kept in mind when

choosing components: all components in the power supply must withstand this voltage.

A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current

absorption peaks, a 100µF tantalum capacitor is usually suited.

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

least 10V.

For car applications a spike protection diode should be inserted close to the power input, in order

to clean the supply from spikes.

A protection diode should be inserted close to the power input, in order to save the CC864-Dual

from power polarity inversion. This can be the same diode as for spike protection.

4.2.3. 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,

hence a single 3.7V lithium-ion cell battery type is suited for supplying the power to the CC864-

Dual module.

The three 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

and damage it.

A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current

absorption peaks, a 100uF tantalum capacitor is usually suited.

A protection diode should be inserted close to the power input, in order to save the CC864-Dual

from power polarity inversion. Otherwise the battery connector should be done in a way to avoid

polarity inversion when connecting the battery.

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4.3. Battery Charge control Circuitry Design

Guideline

The CC864-Dual provides support circuitry for charging a lithium-ion battery, utilizing as many as

four software-enabled charging techniques: trickle, constant current, constant voltage, and pulsed.

Battery voltage, external supply voltage, and total detected current measurements are available to

software through the analog multiplexer. This allows the software device to monitor charging

parameters, make decisions, and control the charging process.

Charging begins with trickle charging, a mode that limits the current and avoids pulling VDD down.

Once a minimum battery voltage is established using trickle charging, constant current charging is

enabled via software to charge the battery quickly - this mode is sometimes called fast charging.

Once the Li-ion battery approaches its target voltage (through constant current charging), the

charge is completed using either constant voltage or pulse charging. Further discussion of all

charging modes is provided in the sections identified within bellowed picture.

The main battery charging sequence is

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4.3.1. Trickle charging

Trickle charging of the main battery, enabled through software control and powered from Vdd, is

provided by the CC864-Dual. This mode is used to raise a severely depleted battery’s voltage to a

level sufficient to begin fast charging.

Fast charging with a high-current supply should not be attempted on a deeply discharged battery –

the battery would draw excessive current, pull the Vdd voltage down, and possibly cause a

handset malfunction or shutdown due to an under-voltage lockout condition. If the CC864-Dual

implements current limiting, the excessive current would combine with the potentially large voltage

drop across the pass transistor to generate unwanted heat within the device. To avoid these

problems the CC864-Dual provides a constant, low-current charging mode - trickle charging.

Trickle charging is enabled through software control and should be used until the main battery

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reaches its desired threshold, usually about 3.0V for Li-ion batteries. The threshold varies with

battery type and application, so there is no predefined value implemented in the detection circuits.

Software must terminate trickle charging based on battery voltage measurements and the battery

type – there is not a preset termination threshold.

4.3.2. Constant current charging

The CC864-Dual supports constant current charging of the main battery. During constant current

charging the battery is charged with a constant current(600mA). As the battery voltage rises and

approaches its desired value(4.2V) the charging current begins to decrease. This is the end of

constant current charging and the beginning of residual charging. The target value is set by SBI-

programming to a value higher than the desired final voltage to overcome the battery internal ESR

and achieve faster charging. Software monitors the voltage and takes the appropriate action to

terminate the constant current charging mode. Charging continues with residual charging(either

constant voltage or pulsed).

4.3.3. Constant voltage charging

Once constant current charging of a lithium-ion battery is finished, the charging continues using

either constant voltage or pulsed techniques.

The constant voltage charging is very similar to its constant current mode. The battery voltage is

constant(or nearly so) while the charging current decreases exponentially for the remaining

charger process.

The end of constant voltage charging is typically detected by allowing voltage operation for a

predetermined duration beyond crossing the VBATDET threshold in the charger IC(on the order of

one-half to two hours). It is important to limit this predetermined duration – do not allow charging to

continue indefinitely! Charging too long will damage the battery….consult battery manufacturers for

specific recommendations.

4.3.4. Pulse charging

Pulse charging is implemented by switching the pass transistor in the charger IC on and off ; phone

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electronics should draw minimal current so the battery’s open circuit voltage can be measured

accurately during the off interval.

Pulse charging, compared to constant voltage charging, provides better voltage accuracy, reaches

full charge more quickly, and dissipates less transistor power when switching from constant current

charging. Pulse charging is enabled through software control, uses the same hardware as constant

current or constant voltage charging, but repetitiously opens and closes the pass transistor to

deliver current pulses to the battery.

As the battery charges it reaches the VBADET threshold, causing the internal charger IC counter

T_ON to start. The pass transistor stays closed(and the battery continues charging) until the T_ON

counter expires. Then the pass transistor is opened, charging stops, and another internal

counter(T_OFF) is enabled. Without continued charging, the battery voltage may drop-if it drops

too far, additional charging is needed. If it holds its voltage, it is fully charged and the charging

process is terminated. This is one purpose of pulsed operation – to check and recheck the

battery’s open circuit voltage, confirming a full charger before terminating the process.

4.4. Thermal Design Guidelines

The thermal design for the power supply heat sink should be done with the following specification:

y Average current consumption during transmission at Max level : 700mA

y Average current consumption during transmission at Min level : 220mA

y Average current during Idle mode : 60mA

y Average current during sleep mode : 1mA

y Average current during hibernation mode : 275nA

Considering the very low current during idle, especially if Power Saving function is enabled, it is

possible to consider from the thermal point of view that the device absorbs current significantly only

during calls.

If we assume that the device stays into transmission for short periods of time(let’s say few minutes)

and then remains for a quite long time in idle(let’s say one hour), then the power supply has always

the time to cool down between the calls and the heat sink could be smaller than the calculated one

for 700mA maximum RMS current, or even could be the simple chip package(no heat sink)

Moreover in the average network conditions the device is requested to transmit at a lower power

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level than the maximum and hence the current consumption will be less than 700mA.

For these reasons the thermal design is rarely a concern and the simple ground plane where the

power supply chip is placed can be enough to ensure a good thermal condition and avoid

overheating. This generated heat will be mostly conducted to the ground plane under the CC864-

DUAL, you must ensure that your application can dissipate it.

4.5. Power Supply PCB layout Guidelines

The Bypass low ESR capacitor must be placed close to the CC864-Dual power input pads or in the

case the power supply is a switching type it can be placed close to the inductor to cut the ripple

provided the PCB trace from the capacitor to the CC864-Dual is wide enough to ensure a dropless

connection even during the 1A current peaks.

The protection diode must be placed close to the input connector where the power source is

drained.

The PCB traces from the input connector to the power regulator IC must be wide enough to ensure

no voltage drop occur when the 1A current peaks are absorbed.

The PCB traces to the CC864-Dual and Bypass capacitor must be wide enough to ensure no

significant voltage drops occur when the 1A current peaks are absorbed. Try to keep this traces as

short as possible.

The PCB traces connecting the Switching output to the inductor and the switching diode must be

kept as short as possible by placing the inductor and the diode very close to the power switching

IC(only for switching power supply). This is done in order to reduce the radiated field(noise) at the

switching frequency(100~500㎑ usually)

The use of a good common ground plane is suggested.

The placement of the power supply on the board should be done in such a way to guarantee that

the high current return paths in the ground plane are not overlapped to any noise sensitive circuitry

as the microphone amplifier/buffer or earphone amplifier.

The power supply input cables should be kept separate from noise sensitive lines such as

microphone/earphone cables.

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5. Antenna

The antenna connection and board layout are the most important part in the full product design and

they strongly reflect on the product overall performance, hence read carefully the requirements and

the guidelines for a proper design.

5.1. Antenna Requirements

Parameters Descriptions

Frequency range(CDMA) Tx : 824㎒ ~ 849, Rx : 869 ~ 894㎒

Frequency range(PCS) Tx : 1850㎒ ~ 1910㎒, Rx : 1930㎒ ~ 1990㎒

Frequency range(GPS) 1575.42㎒

Impedance 50Ω

VSWR recommended ≤ 2

Radiation pattern Omni-directional

Polarization Vertical

Furthermore if the device is developed for the US market and/or Canada market, it shall comply to

the FCC and/or IC approval requirements:

5.2. Antenna Connector

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

P/N MM9329-2700RA1. The counterpart suitable is Murata MXTK92 type or MXTK88 type.

5.3. Antenna installation Guidelines

Install the antenna in a place covered by the CDMA signal

Antenna shall not be installed inside metal cases

Antenna shall be installed also according Antenna manufacturer instructions

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6. PINs allocation

The CC864-DUAL uses an 80 pin Molex p.n 53949-0878 male connector for the connections with

the external applications. This connector matches the 54150-0878 model.

Pin Signal I/O Function Internal

Pull up Type

Power Supply

1 VBATT - Main power supply Power

2 VBATT - Main power supply Power

3 VBATT - Main power supply Power

4 VBATT - Main power supply Power

5 GND - Ground Power

6 GND - Ground Power

7 GND - Ground Power

Audio

8 AXE I Handsfree switching 100kΩ CMOS 2.8V

9 EAR_HF+ AO Handsfree ear output, phase+ Audio

10 EAR_HF- AO Handsfree ear output, phase- Audio

11 EAR_MT+ AO Handset earphone signal output, phase+ Audio

12 EAR_MT- AO Handset earphone signal output, phase- Audio

13 MIC_HF+ AI Handsfree microphone input ; phase+, nominal

level

3mVrms

Audio

14 MIC_HF- AI Handsfree microphone input ; phase-, nominal

level

3mVrms

Audio

15 MIC_MT+ AI Handset microphone signal input ; phase+,

nominal level

50mVrms

Audio

16 MIC_MT- AI Handset microphone signal input ; phase-,

nominal level 50mVrms

Audio

R-UIM Card Interface

18 UIM_PWR - Power supply for the UIM 2.8V

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19 UIM_RST O Reset 2.8V

20 UIM_DATA I/O Data I/O 2.8V

21 UIM_IN I Presence(active low) 47kΩ 2.8V

22 UIM_CLK O Clock 2.8V

QCOM Diagnostic Monitor

23 RX_TRACE I RX Data for debug monitor CMOS 2.8V

24 TX_TRACE O TX Data for debug monitor CMOS 2.8V

Prog. / Data + Hw Flow Control

25 C103/TXD I Serial data input (TXD) from DTE CMOS 2.8V

26 C104/RXD O Serial data output to DTE CMOS 2.8V

27 C107/DSR O Output for Data set ready signal (DSR) to DTE CMOS 2.8V

28 C106/CTS O Output for Clear to send signal (CTS) to DTE CMOS 2.8V

29 C108/DTR I Input for Data terminal ready signal (DTR) from

DTE

CMOS 2.8V

30 C125/RING O Output for Ring indicator signal (RI) to DTE CMOS 2.8V

31 C105/RTS I Input for Request to send signal (RTS) from DTE CMOS 2.8V

32 C109/DCD O Output for Data carrier detect signal (DCD) to

DTE

CMOS 2.8V

IIC

33 SCL I/O IIC Hardware interface CMOS 2.8V

34 SDA I/O IIC Hardware interface CMOS 2.8V

USB

35 USB_ID I USB_ID input 47kΩ CMOS 2.8V

48 USB_VBUS AI/A

USB_VBUS power supply 5V

79 USB_D+ I/O USB Data(USB Internal Transceiver In/Output) 2.8V~3.6V

80 USB_D- I/O USB Data(USB Internal Transceiver In/Output) 2.8V~3.6V

DAC and ADC

37 ADC_IN1 AI Analog/Digital converter input A/D

38 ADC_IN2 AI Analog/Digital converter input A/D

39 ADC_IN3 AI Analog/Digital converter input A/D

40 DAC_OUT AO Digital/Analog converter output D/A(PWM)

PCM

36 PCM_CLOCK I/O Telit GPIO Configurable GPIO CMOS 2.8V

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63 TGPIO_10/PCM_T

I/O Telit GPIO10 Configurable GPIO CMOS 2.8V

65 TGPIO_18/PCM_

I/O Telit GPIO18 Configurable GPIO CMOS 2.8V

71 TGPIO_17/PCM_

SYNC

I/O Telit GPIO17 Configurable GPIO CMOS 2.8V

Miscellaneous Functions

45 STAT_LED O Status indicator led CMOS 1.8V

46 GND - Ground Ground

49 PWRMON O Power ON Monitor CMOS 2.8V

50 VAUX1 - Power output for external accessories (AT

command driven)

2.85V/

150mA

51 CHARGE AI Charger input Li-Ion Power

52 CHARGE AI Charger input Li-Ion Power

53 ON/OFF* I Input command for switching power ON or OFF

(toggle command). The pulse to be sent to the

CC864-DUAL must be equal or greater than 1

second.

47kΩ Pull up to

VBTT

54 RESET* I Reset input

55 VRTC Power

Telit GPIO

56 TGPIO_19 I/O Telit GPIO19 Configurable GPIO CMOS 2.8V

57 TGPIO_11/VIBRA

TOR

I/O Telit GPIO11 Configurable GPIO/Vibrator CMOS 2.8V

58 TGPIO_20 I/O Telit GPIO20 Configurable GPIO CMOS 2.8V

59 TGPIO_04/CONV

ERSATION

I/O Telit GPIO4 Configurable GPIO/Conversation CMOS 2.8V

60 TGPIO_14 I/O Telit GPIO14 Configurable GPIO CMOS 2.8V

61 TGPIO_15 I/O Telit GPIO15 Configurable GPIO CMOS 2.8V

62 TGPIO_12/AUDIO

CALL BUTTON

I/O Telit GPIO12 Configurable GPIO/Audio Call

Button

CMOS 2.8V

64 TGPIO_22 I/O Telit GPIO22 Configurable GPIO CMOS 1.8V

66 TGPIO_03/AUDIO

MUTE

I/O Telit GPIO03 Configurable GPIO/Audio Mute CMOS 2.8V

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67 TGPIO_08/POWE

R_SAVING

I/O Telit GPIO08 Configurable GPIO/Power saving

mode

CMOS 2.8V

68 TGPIO_06/ALAR

I/O Telit GPIO06 Configurable GPIO/Power wakeup CMOS 2.8V

70 TGPIO_01 I/O Telit GPIO01 Configurable GPIO CMOS 2.8V

72 TGPIO_21 I/O Telit GPIO21 Configurable GPIO CMOS 2.8V

73 TGPIO_07/BUZZE

I/O Telit GPIO07 Configurable GPIO/Buzzer CMOS

2.8V(PWM)

74 TGPIO_02 I/O Telit GPIO02 Configurable GPIO CMOS 2.8V

75 TGPIO_16 I/O Telit GPIO16 Configurable GPIO CMOS 2.8V

76 TGPIO_09 I/O Telit GPIO09 Configurable GPIO CMOS 2.8V

77 TGPIO_13/ACTIV

I/O Telit GPIO13 Configurable GPIO/ACTIVE pin to

protect current leakage

CMOS 2.8V

78 TGPIO_05/RFTX

MON

I/O Telit GPIO05 Configurable GPIO/Transmitter ON

monitor

CMOS 2.8V

Reserved

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7. Interface Description

This chapter covers information required to convert the CC864-Dual into a subscriber unit

application.

And this chapter include :

y UART1 : RS232 level translation for AT command

y R-UIM card holder

y USB

y IIC BUS Interface

y ADC/DAC signals

y General Purpose I/O

7.1. UART1(RS232 level translation)

The serial port on the CC864-DUAL is the core of the interface between the module and Host

hardware.

Depending from the type of serial port on the Host hardware, a level translator circuit may be

needed to make the system work. The only configuration that doesn’t need a level translation is the

2.8V UART.

There are two UART port on the CC864-Dual. It differs from the PC RS232 in the signal

polarity(RS232 is reversed) and levels. The levels for the CC864-Dual UART are the CMOS levels:

Absolute maximum ratings – Not functional

Parameter Min Max

Input level on any digital pin when on -0.3V +3.75V

Input voltage on analog pins when on -0.3V +3.0V

Operating Range – Interface levels(2.8V CMOS)

Level Min Max

Input high level VIH 1.85V 3.15V

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Input low level VIL -0.3V 0.9V

Output high level VOH 2.4V 2.85V

Output low level VOL 0.0V 0.45V

UART1 is used for interfacing between the CC864-Dual and Host. The CC864-Dual and its host

transmit data or AT-command through RS-232 signal line.

The signals of the CC864-Dual serial port are:

RS232

Pin Nr Signal PIN

Number Name Usage

1 DCD-

dcd_uart

32 Data Carrier Detect Output from the CC864-Dual that

indicates the carrier presence

2 RXD-tx_uart 26 Transmit line Output transmit line of CC864-Dual

UART

3 TXD-rx_uart 25 Receive line Input receive of the CC864-Dual

UART

4 DTR-dtr_uart 29 Data Terminal

Ready

Input to the CC864-Dual that control

the DTE READY condition

5 GND 5,6,7 Ground Ground

6 DSR-dsr_uart 27 Data Set Ready Output from the CC864-Dual that

indicates the module is ready

7 RTS-rts_uart 31 Request to Send Input to the CC864-Dual that

controls the Hardware flow control

8 CTS-cts_uart 28 Clear to Send Output from the CC864-Dual that

controls the Hardware flow control

9 RI-ri_uart 30 Ring Indicator Output from the CC864-Dual that

indicates the incoming call condition

In order to interface the CC864-Dual with a PC com port or a RS232(EIA/TIA-232) application a

level translator is required. This level translator must

invert the electrical signal in both directions

change the level from 0/3V to 15/-15V

Actually, the RS232 UART 16450, 16550, 16650 & 16750 chipsets accepts signals with lower

levels on the RS232 side(EIA/TIA-562), allowing for a lower voltage-multiplying ratio on the level

translator. Note that the negative signal voltage must be less than 0V and hence some sort of level

translation is always required.

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By convention the driver is the level translator from the 0-3V UART level to the RS232 level, while

the receiver is the translator from RS232 level to 0-3V UART.

In order to translate the whole set of control lines of the UART you will need: 5 driver and 3

receiver

An example of level translation circuitry of this kind is :

The RS232 serial port lines are usually connected to a DB9 connector with the following layout :

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7.1.1. 5V UART level translation

If the Host application uses a microcontroller with a serial port(UART) that works at a voltage

different from 2.8~3V, then a circuitry has to be provided to adapt the different levels of the two sets

of signals. As for the RS232 translation there are a multiple of single chip translators, but since the

translation requires very few components, then also a discrete design can be suited. For example

a possible inexpensive translator circuit for a 5V driver can be:

And for a 5V receiver:

7.2. R-UIM Holder

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The Removable User Identify Module(R-UIM) is a smart card for CDMA cellular applications. R-

UIM provides personal authentication information which allows the mobile station or handset to be

connected with the network. The R-UIM card enables handset independence for the user. The R-

UIM card can be inserted into any CDMA R-UIM equipped handset, allowing the user to receiver or

make calls and receive other subscribed services from any R-UIM equipped handset.

7.2.1. R-UIM Design Guidelines

Aim of this section is to give basic design guide lines to integrate a R-UIM holder in applications

that uses

Pin NO. Signal Name Signal Description Direction

18 VREG_UIM_PWR_2.85V Power supply CC864-Dual → R-UIM

19 UIM_RST Reset signal CC864-Dual → R-UIM

20 UIM_DATA Serial data CC864-Dual ↔ R-UIM

21 UIM_IN NC

22 UIM_CLK Clock CC864-Dual → R-UIM

7.3. USB Port

The CC864-Dual includes a universal serial bus(USB) transceiver. This transceiver operates at

USB low-speed(1.5Mbits/sec) and USB full-speed(12Mbits/sec). It is complaint with USB 2.0

specification. It can be used for diagnostic monitoring purpose.

Number Signal Usage

35 USB_ID Analog input used to sense whether a peripheral device is connected,

and determine the peripheral type, a host or a slave

48 USB_VBUS

Power supply for the internal USB transceiver. This pin is configured as

an analog input or and analog output depending upon the type of

peripheral device connected.

79 USB_D+ Plus(+) line of the differential, bi-directional USB signal to/from the

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peripheral device

80 USB_D- Minus(+) line of the differential, bi-directional USB signal to/from the

peripheral device

7.4. IIC Bus Interface

I2C is a two-wire bus for inter-IC communication that supports any IC fabrication process(NMOS,

CMOS, bipolar, etc). Two wires(or lines), serial data(SDA) and serial clock(SCL), carry information

between the connected devices. Each device is recognized by a unique address(whether it’s a

microcontroller, memory, LCD driver, stereo DAC, or keyboard interface) and can operate as either

a transmitter or receiver, depending on the device function.

Pin No Name Description

33 SCL Serial BUS Clock

34 SDA Serial BUS Data

7.5. ADC/DAC signals

Analog measurement output or sensor output(Battery voltage, temperature etc) can be connected

to ADC pin. Then it change analog value to digital.

DAC pin drive out PWM signal and control external component. And you need additional RC filter

to change PWM signal to analog signal.

Pin No Name Description Direction

37 ADC_IN1 Analog/Digital converter

input

→ CC864-Dual

38 ADC_IN2 Analog/Digital converter

input

→ CC864-Dual

39 ADC_IN3 Analog/Digital converter

input

→ CC864-Dual

40 DAC_OUT Digital/Analog converter

input

← CC864-Dual

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7.6. General Purpose I/O

The general purpose I/O pads can be configured to act in three different ways:

y input : Input pads can only be read and report the digital value(high or low) present on

the pad at the read time

y output : output pads can only be written or queried and set the value of the pad output

y alternate function(internally controlled) : an alternate function pad is internally

controlled by the CC864-Dual firmware and acts depending on the function

implemented.

Pin Signal I/O Function Type Default

state

On_OFF

state

Alternative

Function

70 TGPIO_01 I/O Gonfigurable GPIO CMOS2.8V Input Low

74 TGPIO_02 I/O Gonfigurable GPIO CMOS2.8V Input Low JDR

66 TGPIO_03 I/O Gonfigurable GPIO CMOS2.8V Input Low AUDIO MUTE

59 TGPIO_04 I/O Gonfigurable GPIO CMOS2.8V Input Low CONVERSATION

78 TGPIO_05 I/O Gonfigurable GPIO CMOS2.8V Input Low RFTXMON

68 TGPIO_06 I/O Gonfigurable GPIO CMOS2.8V Input ALARM

73 TGPIO_07 I/O Gonfigurable GPIO CMOS2.8V Input Low BUZZER

67 TGPIO_08 I/O Gonfigurable GPIO CMOS2.8V Input Low POWER_SAVING

76 TGPIO_09 I/O Gonfigurable GPIO CMOS2.8V Input Low

63 TGPIO_10 I/O Gonfigurable GPIO CMOS2.8V Input Low PCM_TX

57 TGPIO_11 I/O Gonfigurable GPIO CMOS2.8V Input Low VIBRATOR

62 TGPIO_12 I/O Gonfigurable GPIO CMOS2.8V Input Low CALL_KEY

77 TGPIO_13 I/O Gonfigurable GPIO CMOS2.8V Input Low ACTIVE

60 TGPIO_14 I/O Gonfigurable GPIO CMOS2.8V Input Low

61 TGPIO_15 I/O Gonfigurable GPIO CMOS2.8V Input Low

75 TGPIO_16 I/O Gonfigurable GPIO CMOS2.8V Input Low

71 TGPIO_17 I/O Gonfigurable GPIO CMOS2.8V Input Low PCM_SYNC

65 TGPIO_18 I/O Gonfigurable GPIO CMOS2.8V Input Low PCM_RX

56 TGPIO_19 I/O Gonfigurable GPIO CMOS2.8V Input Low

58 TGPIO_20 I/O Gonfigurable GPIO CMOS2.8V Input Low

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72 TGPIO_21 I/O Gonfigurable GPIO CMOS2.8V Input Low

64 TGPIO_22 I/O Gonfigurable GPIO CMOS2.8V Input Low

7.6.1. Logic level specifications

Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels. The

following tables shows the logic level specifications used in the CC864-Dual interface circuits :

Absolute maximum ratings – Not functional

Parameter Min Max

Input level on any digital pin when

-0.3V +3.75V

Input voltage on analog pins when

-0.3V +3.0V

Operating Range – Interface levels(2.8V CMOS)

Level Min Max

Input high level VIH 1.85V 3.15V

Input low level VIL -0.3V 0.9V

Output high level VOH 2.4V 2.85V

Output low level VOL 0.0V 0.45V

For 1.8V

Operating Range – Interface levels(1.8V CMOS)

Level Min Max

Input high level 1.6V 2.1V

Input low level -0.3V 0.63V

Output high level 1.35V 1.8V

Output low level 0.0V 0.35V

7.6.2. Using a GPIO pad as Input

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The GPIO pads, when used as input, can be connected to a digital output of another device and

report its status, provided this device has interface levels compatible with the 2.8V CMOS levels of

the GPIO

7.6.3. Using a GPIO pad as Output

The GPIO pads, when used as outputs, can drive 2.8V CMOS digital devices or compatible

hardware. When set as outputs, the pads have a push-pull output and therefore the pull-up resistor

may be omitted.

7.6.4. TGPIO_03/AUDIOMUTE

This pin can be used to mute audio. It is always desirable to have a mute control on the amplifier,

in order to turn it off while the device is not sending signal to the output, in this matter the amplifier

background noise which may be audible during idle condition is cut off.

7.6.5. TGPIO_04/CONVERSATION

This signal can be used as the audio amplifier enable control signal when the modem uses the

audio amplifier on its receiver speaker output layer. It will reduce current consumption because it

can activate the amplifier only when there is voice data.

7.6.6. TGPIO_05/RFTXMON

This pin will be changed to High state when CC864-DUAL is transmitting state.

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7.6.7. TGPIO_06/ALARM

This pin, when configured as Alarm Output, is controlled by the CC864-Dual module and will rise

when the alarm starts and fall after the issue of a dedicated AT command.

This output can be used to power up the CC864-Dual controlling microcontroller or application at

the alarm time, giving you the possibility to program a timely system wake-up to achieve some

periodic actions and completely turn off either the application and the CC864-Dual during sleep

periods, dramatically reducing the sleep consumption to few ㎂. In battery powered devices this

feature will greatly improve the autonomy of the device.

7.6.8. TGPIO_07/BUZZER

This pin, when configured as Buzzer Output, is controlled by the CC864-Dual module and will drive

with appropriate square waves a Buzzer driver. This permits to your application to easily implement

Buzzer feature with ringing tones or melody played at the call incoming, tone playing on SMS

incoming or simply playing a tone or melody when needed by your application.

The example is :

7.6.9. TGPIO_08/POWER_SAVING

The Host gives this signal to the CC864-Dual, it makes the CC864-Dual turn to be power saving

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mode. This signal is Low enable. When the CC864-Dual enters into power saving mode, every

active items include UART port will be off. So current consumption is considerably reduced.

And the CC864-Dual monitors the TXD line state of UART1. If the state will be changed Low state,

the CC864-Dual will turn to be power saving mode automatically.

The application developer must keep in mind that this signal and TXD line state of UART1 perform

same function. So if one of the both becomes Low state , the CC864-Dual will turn to be power

saving mode.

7.6.10. TGPIO_11/VIBRATOR

When configured as VIBRATOR output, this pin is controlled by the CC864-Dual module and will

drive with appropriate square waves. Refer the Buzzer circuitry.

7.6.11. TGPIO_12/CALL_KEY

When Earjack is inserted, this pin is used to connect outgoing call or response incoming call.

7.6.12. TGPIO_13/ACTIVE

This signal is used as an enable signal to control the buffer between CC864-Dual and the host.

When reset procedure and boot sequence are done successfully, CC864-Dual drives ACTIVE

signal to be High state. And its output is Low state when CC864-Dual is power off. So a pull-down

resistor is needed to be clear its state.

Most of the signals(except ON/OFF, RESET, STAT_LED) between CC864-Dual and host must use

a buffer. It prevents leakage currents flow from Host that is power-on stated to CC864-Dual that is

power-off stated. Leakage current could cause CC864-Dual to reset failure.

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8. Audio Section

The CC864-DUAL module provides two different audio blocks; both in transmit(Uplink) and in

receive(Downlink) direction:

“MT lines” should be used for handset function,

“HF lines” is suited for hands-free function or earphone function.

These two blocks can be active only one at a time, selected by AXE hardware line or by AT

command.

The audio characteristics are equivalent in transmit blocks, but are different in the receive ones

and this should be kept in mind when designing.

8.1. Differential Audio Interface design

You can use the MIC_MT+, MIC_MT-, EAR_MT+, EAR_MT-.

8.1.1. General Design Rules

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There are several configuration for the audio paths, but the most difference is between balanced

and unbalanced microphone configuration.

It is highly recommended to keep the whole microphone path balanced even if this means having

2wires connecting the microphone instead of one needed in the unbalanced case. The balanced

circuitry is more suited because of its good common mode noise rejection.

Keep the microphone traces on the PCB and wires as short as possible.

If your application requires an unbalanced microphone, then keep the lines on the PCB balanced

and “unbalance” the path close to the microphone wire connector if possible.

Make sure that the microphone traces in the PCB don’t cross or run parallel to noisy

traces(especially the power line).

If possible put all around to the microphone lines a ground trace connected to the ground plane by

several vias. This is done in order to simulate a shielded trace on the PCB.

The CC864-DUAL provides two audio paths in receive section. Only one of the paths can be active

at a time, selectable by AXE hardware line or by AT command.

8.1.2. Microphone design

You need an additional external bias circuitry.

The example is :

8.2. Receiver design

The EAR_MT+, EAR_MT- are the differential line-out drivers. You can drive directly a 16Ω earpiece

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and don’t need an external audio amplifier circuitry. This solution is often the most cost effective,

reducing the components count to a minimum.

The example is :

8.3. Speaker design

The EAR_MT+, EAR_MT- are the differential line-out drivers. You can drive a 8Ω speaker with an

external audio amplifier. This solution is can be used when high audio power is needed.

The example is :

8.4. Single-ended Audio Interface design (Hand-

free or earphone design)

You can use the MIC_HF+, MIC_HF-, EAR_HF+, EAR_HF-.

Additional MIC_HF+ bias circuitry, AUDIO_AUX circuitry, AUDIO_CALL_BUTTON circuitry are

needed.

AUDIO_AUX will be used to notify if earphone is inserted or not. AUDIO_CALL_BUTTON will be

used to send outgoing call or to receive incoming call.

The example is :

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8.5. Car kit speakerphone design

If you want to design carkit speakerphone with PCM signals, you must need an external codec and

an external audio amplifier. When PCM signals connected, the default state of PCM_RX signal is

high state. CC864-DUAL monitor this signal and change audio path to PCM signals.

8.6. PCM Interface

The CC864-Dual PCM interface can be used in two modes : 1) auxiliary PCM(the default) running

at 128kHz; or 2) primary PCM running at 2.048Mhz.

The auxiliary PCM interface enables communication with an external CODEC to support hands-

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free application. Linear, μ-law, and A-law CODECs are supported by the auxiliary PCM interface.

The auxiliary CODEC port operates with standard long-sync timing and a 128kHz clock. Most μ-

law and A-law CODECs are support the 128kHz AUX_PCM_CLK bit clock.

The auxiliary CODEC port also supports 2.048Mhz PCM data and sync timing for linear, μ-law,

and A-law CODECs that match the sync timing – this is called the primary PCM interface(or just

PCM interface). PCM interface can be configured and controlled by either direct register access

through the CODEC_CTL register, or by the aDSP CODEC configuration command. Using the

CODEC configuration command is the preferred method.

Number Name I/O Description Level

36 PCM_CLOCK I/O PCM_CLOCK CMOS 2.8V

63 TGPIO_10/PCM_TX I/O TGPIO10 Configurable GPIO/PCM_TX CMOS 2.8V

65 TGPIO_18/PCM_RX I/O TGPIO18 Configurable GPIO/PCM_RX CMOS 2.8V

71 TGPIO_17/PCM_SYNC I/O TGPIO17 Configurable GPIO/PCM_SYNC CMOS 2.8V

9. Miscellaneous signals

9.1. VAUX1

A regulated power supply output is provided in order to supply small devices from module. This

output is active when the module is ON and goes off when module is shut down. The operating

range characteristics of the supply are:

Operating Range – Vout power supply

Parameters Min Typ Max

Output voltage 2.75V 2.85V 2.95V

Output current 100mA

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Output bypass

capacitor

2.2uF

Care must be taken to avoid latch-up on the CC864-Dual and the use of this output line to power

electronic devices shall be considered with care, especially for devices that generate spikes and

noise such as level translators, digital ICs or microcontroller, failure in any of these condition can

severely compromise the CC864-Dual functionality.

9.2. VRTC

This pin is used to supply power to RTC(Real Time Clock) Module when CC864-Dual is off state.

RTC module can power up CC864-Dual at alarm time. Refer the “TGPIO_06/ALARM” part.

Connect Super capacitor at this pin. Super capacitor is charged when CC864-Dual is on and it

supply power to the RTC Module when CC864-Dual is off.

9.3. STAT_LED

This pin is a open collector output signal. It can be synchronized by Slot Cycle Index to make the

LED blinking. Turn On time is 50ms. If the modem is in no service area, the modem turns off the

LED. The LED is blinking in idle mode, and keeps Turn On in traffic mode.

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9.4. PWRMON

Its function is similar to ACTIVE. If the reset procedure or boot sequence is finished successfully,

PWRMON will be changed to High state.

9.5. AUDIO_AUX

This pin can be used for Handfree(earphone detection) switching. If the earphone is inserted to the

earjack connector, CC864-Dual will change the audio path to MIC_HF± and EAR_HF± from

MIC_MT± and EAR_MT±.

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10. Safety Recommendations

READ CAREFULLY

Be sure the use of this product is allowed in the country and in the environment required. The use

of this product may be dangerous and has to be avoided in the following areas :

Where it can interface with other electronic devices in environments such as hospitals, airports, air

crafts, etc

Where there is risk of explosion such as gasoline, oil refineries, etc

It is responsibility of the user to enforce the country regulation and the specific environment

regulation.

Do not disassemble the product; any mark of tampering will compromise the warranty validity.

We recommend following the instructions of the hardware user guides for a correct wiring of the

product. The product has to be supplied with a stabilized voltage source and the wiring has to be

conforming to the security and fire prevention regulations.

The product has to be handled with care, avoiding any contact with the pins because electrostatic

discharges may damage the product itself. Same cautions have to be taken for the R-UIM card,

checking carefully the instruction for its use. Do not insert or remove the R-UIM when the product

is in power saving mode.

The system integrator is responsible of the functioning of the final product; therefore, care has to

be taken to the external components of the module, as well as of any project or installation issue.

Should there be any doubt, please refer to the technical documentation and the regulation in force.

Every module has to be equipped with a proper antenna with specific characteristics. The antenna

has to be installed with care in order to avoid any interface with other electronic devices and has to

quarantine a minimum distance from the body(20Cm). In case of this requirement cannot be

satisfied, the system integrator has to assess the final product against the SAR regulation.

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11. Reference

y QSC6055TM, QSC6065TM, QSC6075TM and QSC6085TM Single ChipTM Device Specification

80-VC881-1

y QSC6055TM, QSC6065TM, QSC6075TM and QSC6085TM Qualcomm Single ChipTM User

Guide 80-VC881-3

12. Document Change Log

Revision Date Changes

Draft #0 12-Nov-07 Draft

FCC Compliance Information

This device complies with Part 15 of FCC Rules.

Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and

(2) This device must accept any interference received.

Including interference that may cause undesired operation.

Telit Communications S p A CC864-DUAL DUAL BAND CDMA/GPS Module User Manual User MAnual

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