Telit Communications S p A CL865-DUAL CDMA 1x Module User Manual CL865 DUAL Hardware User Guide

Telit Communications S.p.A. CDMA 1x Module CL865 DUAL Hardware User Guide

Users Manual

CL865-DUAL Hardware User
Guide
1vv0301104 Rev.1 – 2014-03-07
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APPLICABILITY TABLE
PRODUCT
CL865-DUAL
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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.
Copyright © Telit Communications S.p.A.
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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
3. CL865 Mechanical Dimensions ................................. 13
4. CL865 module connections .................................... 14
4.1. PIN-OUT .................................................. 14
4.2. PIN Layout ............................................... 17
5. Hardware Commands ........................................... 18
5.1. Auto-Turning ON the CL865 ................................ 18
5.2. Turning OFF the CL865 .................................... 20
5.3. Hardware Unconditional Shutdown .......................... 22
6. Power Supply ................................................ 24
6.1. Power Supply Requirements ................................ 24
6.2. Power Consumption ........................................ 25
6.3. General Design Rules ..................................... 26
6.3.1. Electrical Design Guidelines ............................... 26
6.3.2. + 5V Input Source Power Supply Design Guidelines ........... 26
6.3.3. + 12V Input Source Power Supply Design Guidelines .......... 27
6.3.4. Battery Source Power Supply Design Guidelines .............. 28
6.3.5. Thermal Design Guidelines .................................. 29
6.3.6. Power Supply PCB layout Guidelines ......................... 30
7. Antenna ..................................................... 31
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7.1. CDMA Antenna Requirements ................................ 31
7.1.1. CL865 Antenna – PCB line Guidelines ........................ 32
7.2. PCB Guidelines in case of FCC certification .............. 33
7.2.1. Transmission line design ................................... 33
7.2.2. Transmission line measurements ............................. 34
7.3. Antenna - Installation Guidelines ........................ 36
8. USB Port .................................................... 37
9. Serial Port ................................................. 38
9.1. Modem Serial Port 1 ...................................... 39
9.2. Modem Serial Port 2 ...................................... 41
9.3. RS232 Level Translation .................................. 42
10. Audio Section Overview ...................................... 44
10.1. Analog Audio Interface (AVI) ........................... 44
10.1.1. MIC Connection ........................................... 45
10.1.2. EAR Connection ........................................... 46
10.2. Digital Voice Interface (DVI) .......................... 47
10.2.1. CODEC Example ............................................ 47
11. General Purpose I/O ......................................... 48
11.1. Logic Level Specification .............................. 49
11.2. Using a GPIO Pad as Input .............................. 49
11.3. Using a GPIO Pad as Output ............................. 50
11.4. Using the Alarm Output GPIO6 ........................... 50
11.5. Indication of Network Service Availability ............. 51
11.6. RTC Bypass Output ...................................... 52
11.7. VAUX/PWRMON Power Output ............................... 52
12. DAC and ADC Section ......................................... 53
12.1. DAC converter .......................................... 53
12.1.1. Description .............................................. 53
12.1.2. Enabling DAC ............................................. 53
12.1.3. Low Pass Filter Example .................................. 54
12.2. ADC converter .......................................... 54
12.2.1. Description .............................................. 54
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12.2.2. Using ADC Converter ...................................... 54
13. Mounting the CL865 on your Board ............................ 55
13.1. General ................................................ 55
13.2. Module finishing & dimensions .......................... 55
13.3. Recommended foot print for the application ............. 56
13.4. Stencil ................................................ 57
13.5. PCB pad design ......................................... 57
13.6. Recommendations for PCB pad dimensions (mm): ........... 58
13.7. Solder paste ........................................... 59
13.8. CL865 Solder reflow .................................... 59
13.9. Debug of the CL865 in production ....................... 61
14. Packing system .............................................. 62
14.1. Packing on tray ........................................ 62
14.2. Moisture sensibility ................................... 64
15. Application Design Guide .................................... 65
15.1. Download and Debug Port ................................ 65
16. Conformity Assessment Issues(Problèmes d'évaluation de
conformité)...................................................... 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 some hardware solutions useful for developing
a product with the Telit CL865 module.
1.2. Audience
This document is intended for Telit customers, who are integrators, about to implement their
applications using our CL865 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 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
Technical Support Center (TTSC).
Our aim is to make this guide as helpful as possible. Keep us informed of your comments and
suggestions for improvements.
Telit appreciates feedback from the users of our information.
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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: “CL865 Mechanical Dimensions”
Chapter 4: “CL865 Module Connections” deals with the pin out configuration and layout.
Chapter 5: “Hardware Commands” How to operate on the module via hardware.
Chapter 6: “Power supply” Power supply requirements and general design rules.
Chapter 7: “Antenna” The antenna connection and board layout design are the most important
parts in the full product design.
Chapter 8: “USB ports” The USB port on the Telit CL865 is the core of the interface between
the module and OEM hardware
Chapter 9: “Serial ports” The serial port on the Telit CL865 is the core of the interface
between the module and OEM hardware
Chapter 10: “Audio Section overview”
Chapter 11: “General Purpose I/O” How the general purpose I/O pads can be configured.
Chapter 12 “DAC and ADC Section” Deals with these two kind of converters.
Chapter 13: “Mounting the CL865 on your board” Recommendations and specifics on how to
mount the module on the user’s board.
Chapter 14: “Packaging system” Recommendations and specifics on how the system is
packaged.
Chapter 15: “Application Design Guide” Deals with the design of host system for download
or upgrade.
Chapter 16: “Conformity Assessment Issues”
Chapter 17: “Safety Recommendations”
Chapter 18: “Document History” Holds all document changes
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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.
1.6. Related Documents
CL865 Software User Guide, 1vv0301105
CL865 AT Commands Reference Guide, 80428ST10592A
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 CL865 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 CL865 module.
NOTE:
The integration of the CDMA 1xRTT 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.
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2.2. Product Specifications
CL865 Specifications
Air Interface
CDMA 1xRTT
Frequency Bands
800/1900MHz (BC0/BC10/BC1)
Data Service
CDMA 1xRTT: 153.6 Kbps (full-duplex)
Max. RF out power
CDMA BC0: Power class 3 (24.5dBm) for 1xRTT
CDMA BC10 subclass2,3: Power class 2 (24.5dBm) for 1xRTT
CDMA BC1: Power class 2 (24.5dBm) for 1xRTT
Typical conducted sensitivity
CDMA BC0: –108dBm
CDMA BC10: –108dBm
CDMA BC1: –107dBm
Device dimensions
24.4mm(L) x 24.4mm(W) x 2.45mm(T)
Weight
3.0g
Storage and Operating
Temperature Range
–40 ~ +85°C
Normal operating
voltage range
3.4 ~ 4.2V
IO voltage
1.8V
Interface
48 VQFN interface
8 general I/O ports maximum including multi-functional I/Os
State LED output
2 A/D converter
1 D/A converter
Full RS232 CMOS UART: baud rate up to 4Mbps
Reserved two wires CMOS UART for debugging
USB 2.0: baud rate up to 12Mbps
Antenna
Primary antenna, 800/1900MHz (BC0/BC10/BC1)
Audio
Analog audio interface ( 1 EAR/MIC)
Message
SMS (MO/MT)
Approvals
Regulatory: FCC, IC
Carrier: Verizon, Sprint
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3. CL865 Mechanical Dimensions
The CL865 overall dimensions are:
Length: 24.4 mm
Width: 24.4 mm
Thickness: 2.45 mm
Weight 3 g
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4. CL865 module connections
4.1. PIN-OUT
Pad
Signal
I/O
Note
Type
USB
18
USB_D+
I/O
17
USB_D-
I/O
16
USB_VBUS
AI
5V
RUIM card interface
9
RUIMVCC
-
1,8 / 3V
10
RUIMRST
O
1,8 / 3V
11
RUIMCLK
O
1,8 / 3V
12
RUIMIO
I/O
1,8 / 3V
X
All GPI0
can be
program
med
RUIMIN
I
CMOS 1.8V
Auxiliary UART
44
RXD_AUX
I
CMOS 1.8V
45
TXD_AUX
O
CMOS 1.8V
Prog. / Data + HW Flow Control
1
C109/DCD/GPO
O
CMOS 1.8V
2
C125/RING/GPO
O
CMOS 1.8V
3
C107/DSR/GPO
O
CMOS 1.8V
4
C108/DTR/GPI
I
CMOS 1.8V
5
C105/RTS/GPI
I
CMOS 1.8V
6
C106/CTS/GPO
O
CMOS 1.8V
7
C103/TXD
I
CMOS 1.8V
8
C104/RXD
O
CMOS 1.8V
DAC and ADC
13
ADC_IN1
AI
A/D
14
ADC_IN2
AI
A/D
15
DAC_OUT
AO
D/A
Miscellaneous Functions
30
VRTC
I
Power
47
RESET*
I
Pull up to VBATT
43
V_AUX / PWRMON
O
Power Out 1.8V
34
Antenna
I/O
RF
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Pad
Signal
I/O
Note
Type
GPIO
42
GPIO_01 / DVI_WA0
I/O
CMOS 1.8V
41
GPIO_02 / DVI_RX
I/O
CMOS 1.8V
40
GPIO_03 / DVI_TX
I/O
CMOS 1.8V
39
GPIO_04 / DVI_CLK
I/O
CMOS 1.8V
29
GPIO_05
I/O
CMOS 1.8V
28
GPIO_06 / ALARM
I/O
CMOS 1.8V
27
GPIO_07
I/O
CMOS 1.8V
26
GPIO_08 / STAT_LED
I/O
CMOS 1.8V
Analog Voice Interface
21
EAR+
AO
20
EAR-
AO
24
MIC+
AI
22
MIC-
AI
Power Supply
38
VBATT
-
Power
37
VBATT_PA
-
Power
23
AGND
-
AF Signal
32
GND
-
Power
33
GND
-
Power
35
GND
-
Power
36
GND
-
Power
46
GND
-
Power
23
GND
-
-
RESERVED
19
-
25
-
31
48
-
WARNING:
Reserved pins must not be connected.
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NOTE:
If not used, almost all pins should be left disconnected. The only exceptions are the following
pins:
Pin
signal
38, 37
VBATT & VBATT_PA
32, 33, 35, 36, 46
GND
23
AGND
7
TXD
8
RXD
5
RTS
6
CTS
43
V_AUX / PWRMON
47
RESET*
45
TXD_AUX
44
RXD_AUX
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4.2. PIN Layout
TOP VIEW
NOTE:
The pins defined as NC/RFU shall be considered RESERVED and must not be connected to
any pin in the application.
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5. Hardware Commands
5.1. Auto-Turning ON the CL865
To Auto-turn on the CL865, the power supply must be applied on the power pins VBATT and
VBATT_PA, after 5000 m-seconds, the V_AUX / PWRMON pin will be at the high logic
level and the module can be considered fully operating.
The following flow chart shows the proper turn on procedure:
Modem ON Proc.
PWR supply = ON?
Y
Delay 1s - 5s for Low
Voltage Operating
Y
Modem Reset Proc.
AT init sequence.
N
Start AT
CMD.
N
PWMON = ON?
Y
PWMON = ON?
Delay 300mS
Enter AT<CR>
AT answer in
1second ?
N
Y
N
Delay 1s
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NOTE:
The power supply must be applied either at the same time on pins VBATT and VBATT_PA,
or first applied on VBATT_PA and then on VBATT. The opposite sequence shall be avoided.
The reverse procedure applies for powering down the module: first disconnect VBATT, then
VBATT_PA, or both at once.
NOTE:
In order to prevent a back powering effect it is recommended to avoid having any HIGH logic
level signal applied to the digital pins of the CL865 when the module is powered OFF or
during an ON/OFF transition.
A flow chart showing the AT commands managing procedure is displayed below:
Modem ON Proc.
Disconnect PWR
supply
AT init sequence.
Delay 300mS
Enter AT<CR>
AT answer in
1second?
Y
N
Start AT CMD.
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5.2. Turning OFF the CL865
Turning off of the device can be done in two ways:
General turn OFF
Processor turn OFF
General turn OFF – disconnect the power supply from the both power pins VBATT and
VBATT_PA at the same time. In this case all parts of the module are in OFF condition, no
power consumption is present.
Processor turn OFF – disconnect the power supply only from the power pin VBATT, the
power pin VBATT_PA can be connected to power supply, in this case a low, about 30uA,
power consumption is present
Before either of both OFF procedures is applied, the AT#SYSHALT AT command must be
sent (see AT Commands Reference Guide), after the OK response message, wait for 10
seconds, then the module can be consider fully not operating and at this moment is possible
disconnect the Power Supply.
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The following flow chart shows the proper turnoff procedure:
WARNING:
POWERMON can be used to monitor only the power on but it cannot be used to monitor the
power off because it remains high.
NOTE:
In order to prevent a back powering effect it is recommended to avoid having any HIGH logic
level signal applied to the digital pins of the CL865 when the module is powered off or during
an ON/OFF transition.
Modem OFF
Proc.
AT#SYSHALT
Disconnect PWR
supply
10s timeout
Modem ON Proc.
Delay 1.5s
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5.3. Hardware Unconditional Shutdown
The Unconditional shutdown of the module could be activated using the RESET* line (pad
47).
WARNING:
The hardware unconditional shutdown must NOT be used during normal operation of the
device since it does not detach the device from the network. It shall be used as an emergency
exit procedure.
To unconditionally shutdown the CL865, the pad RESET* must be tied low for at least 800
milliseconds and then released.
NOTE:
Do not use any pull up resistor on the RESET* line nor any totem pole digital output. It is
pulled up internally to VBATT with 57kΩ. Using an external pull up resistor may bring latch
up problems on the CL865 power regulator and improper functioning of the module.
The line RESET* must be connected only in open collector configuration.
The RESET* will generate an unconditional shutdown of the module without an automatic
restart.
The module will shutdown but will NOT perform the detach from the cellular network.
To proper power on again the module please refer to 5.1 Auto-Turning ON the CL865.
TIP:
The unconditional hardware shutdown must always be implemented on the boards and the
software must use it only as an emergency exit procedure.
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A simple circuit to unconditionally shutdown the module is illustrated below:
For example:
Let us assume you need to drive RESET* pad with a totem pole output of a +3/5 V
microcontroller (uP_OUT2):
NOTE:
In order to prevent a back powering effect it is recommended to avoid having any HIGH logic
level signal applied to the digital pins of the CL865 when the module is powered OFF or
during an ON/OFF transition.
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6. 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 the
requirements carefully and the guidelines that will follow for a proper design.
6.1. Power Supply Requirements
The external power supply must be connected to VBATT & VBATT_PA signals and must
fulfill the following requirements:
POWER SUPPLY
Nominal Supply Voltage
3.8 V
Normal Operating Voltage Range
3.4 V ~ 4.2 V
Extended Operating Voltage Range
3.4 V ~ 4.5 V
NOTE:
The Operating Voltage Range MUST never be exceeded. Special care must be taken when
designing the application’s power supply section to avoid having an excessive voltage drop.
If the voltage drop is exceeding the limits it could cause a Power Off of the module.
Behavior in the extended operating voltage range might deviate from 3GPP2 specification.
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6.2. Power Consumption
Current Consumption
Mode
Average
(mA)
Mode Description
Power off current (Typical)
140uA(*1)
Standby mode
No call in progress (slot cycle index=2)
AT+CFUN=1
31
Normal mode; full functionality of the module
AT+CFUN=4
28
Disabled TX and RX; modules is not registered on the
network
AT+CFUN=5
1.5 (*2)
CFUN=5 full functionality with power saving;
Module registered on the network can receive
incoming call sand SMS
Tx and Rx mode
A call in progress
Max Power Mode
620
CDMA 1x voice/data call
(*1)The off current is the total supply current from the main battery with the XO regulator ON,
19.2MHz XO ON and others are OFF.
(*2) Standby current consumption depends on network configuration or module configuration.
The current consumption value for CFUN=0 or 5 is measured under slot cycle index=2.
TIP:
The electrical design for the power supply should be made ensuring it will be capable of a
peak current output of at least 1A.
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6.3. General Design Rules
The principal guidelines for the Power Supply Design embrace three different design steps:
the electrical design
the thermal design
the PCB layout
6.3.1. Electrical Design Guidelines
The electrical design of the power supply depends strongly on the power source from which
this power is drained. We will distinguish them into three categories:
+5V input (typically PC internal regulator output)
+12V input (typically automotive)
Battery
6.3.2. + 5V Input Source Power Supply Design Guidelines
The desired output for the power supply is 3.8V, hence there is not a big
difference between the input source and the desired output so a linear regulator
can be used. A switching power supply will not be suitable because of the low
drop-out requirements.
When using a linear regulator, a proper heat sink must 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 CL865. 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 must be inserted close to the power input in order to save the
CL865 from power polarity inversion.
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An example of linear regulator with 5V input is:
6.3.3. + 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 suitable
and must not be used. A switching power supply would be preferable because of
its better efficiency, especially with the 1A peak current load represented by
CL865.
When using a switching regulator, a 500 kHz 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.
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.
For car PB battery the input voltage can rise up to 15.8V and this must 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 for
this.
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 must be inserted close to the power
input in order to clean the supply from spikes.
A protection diode must be inserted close to the power input in order to save the
CL865 from power polarity inversion. This can be the same diode as for spike
protection.
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An example of switching regulator with 12V input is in the below schematic:
6.3.4. 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. A single 3.7V lithium-ion cell battery type is ideal to supply power to the Telit CL865
module.
WARNING:
The three 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 CL865 and cause damage. USE only Li-Ion battery types.
A bypass low (usually a 100uF tantalum) ESR capacitor with adequate capacity
must be provided in order to cut the current absorption peaks.
Make sure the low ESR capacitor (usually a tantalum) is rated at least 10V.
A protection diode must be inserted close to the power input in order to protect
the CL865 module from power polarity inversions when connecting the battery.
The battery capacity must be at least 500mAh in order to withstand the current
peaks of 1A. The suggested battery capacity is from 500mAh to 1000mAh.
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6.3.5. Thermal Design Guidelines
The thermal design for the power supply heat sink must be done with the following
specifications:
Average current consumption during CDMA 1x @PWR level max : 620mA
NOTE:
The average consumption during transmissions depends on the power level at which the
device is requested to transmit via the network. The average current consumption hence varies
significantly.
Considering the very low current during idle, especially if the 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 in transmission for short periods of time (a few minutes)
and then remains for quite a long time in idle (one hour), then the power supply always has
time to cool down between the calls and the heat sink could be smaller than the calculated for
620mA maximum RMS current. There could even be a simple chip package (no heat sink).
Moreover in average network conditions the device is requested to transmit at a lower power
level than the maximum and hence the current consumption will be less than 620 mA (usually
around 300 mA).
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.
The heat generated by the CL865 must be taken into consideration during transmission at
24.5dBm max during calls. This generated heat will be mostly conducted to the ground plane
under the CL865. The application must be able to dissipate heat.
In the CDMA 1x mode, since CL865 emits RF signals continuously during transmission,
special attention must be paid to how to dissipate the heat generated.
The current consumption will be up to about 620mA in CDMA 1x continuously at the
maximum TX output power (24.5dBm). Thus, you must arrange the area on the application
PCB must be as large as possible under CL865.
The CL865 must be mounted on the large ground area of the application board and make
many ground vias to dissipate the heat.
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6.3.6. Power Supply PCB layout Guidelines
As seen in the electrical design guidelines, the power supply must have a low ESR capacitor
on the output to cut the current peaks and a protection diode on the input to protect the supply
from spikes and polarity inversion. The placement of these components is crucial for the
correct operation of the circuitry. A misplaced component can be useless or can even decrease
the power supply performance.
The bypass low ESR capacitor must be placed close to the Telit CL865 power
input pads, or if the power supply is a switching type, the capacitor can be placed
close to the inductor to cut the ripple if the PCB trace from the capacitor to
CL865 is wide enough to ensure a drop-less 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 drops occur when the 1A current peaks are absorbed.
While a voltage drop of hundreds of mV may be acceptable from the power loss
point of view, the same voltage drop may not be acceptable from the noise point
of view. If the application does not have an audio interface but only uses the data
feature of the Telit CL865, then this noise is not as disruptive and the power
supply layout design can be more forgiving.
The PCB traces to CL865 and the Bypass capacitor must be wide enough to
ensure no significant voltage drops occur when the 1A current peaks are absorbed.
This is a must for the same above-mentioned reasons. Try to keep this trace 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 (usually
100-500 kHz).
The use of a good common ground plane is suggested.
The placement of the power supply on the board must be done in a way to
guarantee that the high current return paths in the ground plane are not
overlapped with any noise sensitive circuitry such as the microphone
amplifier/buffer or earphone amplifier.
The power supply input cables must be kept separate from noise sensitive lines
such as microphone/earphone cables.
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7. Antenna
The antenna connection and board layout design are the most important parts in the full
product design and they strongly reflect on the product’s overall performance. Read carefully
and follow the requirements and the guidelines for a proper design.
7.1. CDMA Antenna Requirements
The antenna for a Telit CL865 device must fulfill the following requirements:
CL865 Specifications
Frequency range
Depending on the frequency band(s) provided by the
network operator, the customer must use the most suitable
antenna for that/those band(s)
Bandwidth
70 MHz in CDMA BC0
53 MHz in CDMA BC10 (subclass 2,3)
140 MHz in CDMA BC1
Gain
Gain < 5.12dBi in CDMA BC0
Gain < 5.12dBi in CDMA BC10 (subclass 2,3)
Gain < 6.12dBi in CDMA BC1
Impedance
50 Ohm
Input power
> 24.5dBm Average Power in CDMA
VSWR absolute max
≤ 5:1 (Limit to avoid permanent damage)
VSWR recommended
≤ 2:1 (Limit to fulfill all regulatory requirement)
When using the Telit CL865, since there’s no antenna connector on the module, the antenna
must be connected to the CL865 antenna pad (pin 34) by means of a transmission line
implemented in the PCB.
In the case that the antenna is not directly connected at the antenna pad of the CL865, then a
PCB line is required. This transmission line shall fulfill the following requirements:
Antenna Line on PCB Requirements
Characteristic Impedance
50Ohm
Max Attenuation
0.3dB
Coupling with other signals shall be avoided
Cold End (Ground Plane) of antenna shall be equipotential to the CL865 ground pads
Furthermore if the device is developed for the US and/or Canada market, it must comply with
the FCC and/or IC approval requirements:
This device is to be used only for mobile and fixed application. The antenna(s) used for this
transmitter must be installed to provide a separation distance of at least 20 cm from all
persons and must not be co-located or operating in conjunction with any other antenna or
transmitter. End-Users must be provided with transmitter operation conditions for satisfying
RF exposure compliance. OEM integrators must ensure that the end user has no manual
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instructions to remove or install the CL865 module. Antennas used for this OEM module
must not exceed 5dBi gain for mobile and fixed operating configurations.
7.1.1. CL865 Antenna – PCB line Guidelines
When using the Telit CL865 module, since there's no antenna connector on the module, the
antenna must be connected to the CL865 through the PCB with the antenna pad (pin 34).
In the case that the antenna is not directly developed on the same PCB, hence directly
connected at the antenna pad of the CL865, then a PCB line is needed in order to connect with
it or with its connector.
This transmission line shall fulfill the following requirements:
ANTENNA LINE ON PCB REQUIREMENTS
Impedance
50 ohm
Max Attenuation
0,3 dB
No coupling with other signals allowed
Cold End (Ground Plane) of antenna shall be equipotential to the
CL865 ground pins
This transmission line should be designed according to the following guidelines:
Ensure that the antenna line impedance is 50 ohm;
Keep the antenna line on the PCB as short as possible, since the antenna line loss shall be
less than 0,3 dB;
Antenna line must have uniform characteristics, constant cross section; avoid meanders and
abrupt curves;
Keep, if possible, one layer of the PCB used only for the Ground plane;
Surround (on the sides, over and under) the antenna line on PCB with Ground, avoid having
other signal tracks facing directly the antenna line track;
The ground around the antenna line on PCB has to be strictly connected to the Ground Plane
by placing vias every 2mm at least;
Place EM noisy devices as far as possible from CL865 antenna line;
Keep the antenna line far away from the CL865 power supply lines;
If you have EM noisy devices around the PCB hosting the CL865, such as fast switching ICs,
take care of the shielding of the antenna line by burying it inside the layers of PCB and
surround it with Ground planes, or shield it with a metal frame cover.
If you don't have EM noisy devices around the PCB of CL865, by using a micro strip on the
superficial copper layer for the antenna line, the line attenuation will be lower than a buried
one;
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7.2. PCB Guidelines in case of FCC certification
In the case FCC certification is required for an application using CL865, according to FCC
KDB 996369 for modular approval requirements, the transmission line has to be similar to
that implemented on CL865 interface board and described in the following chapter.
7.2.1. Transmission line design
During the design of the CL865 interface board, the placement of components has been
chosen properly, in order to keep the line length as short as possible, thus leading to lowest
power losses possible. A Grounded Coplanar Waveguide (G-CPW) line has been chosen,
since this kind of transmission line ensures good impedance control and can be implemented
in an outer PCB layer as needed in this case. A SMA female connector has been used to feed
the line.
The interface board is realized on a FR4, 4-layers PCB. Substrate material is characterized by
relative permittivity εr = 4.6 ± 0.4 @ 1 GHz, TanD= 0.019 ÷ 0.026 @ 1 GHz.
A characteristic impedance of nearly 50 Ω is achieved using trace width = 1.1 mm, clearance
from coplanar ground plane = 0.3 mm each side. The line uses reference ground plane on
layer 3, while copper is removed from layer 2 underneath the line. Height of trace above
ground plane is 1.335 mm. Calculated characteristic impedance is 51.6 Ω, estimated line loss
is less than 0.1 dB. The line geometry is shown below:
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7.2.2. Transmission line measurements
HP8753E VNA (Full-2-port calibration) has been used in this measurement session. A
calibrated coaxial cable has been soldered at the pad corresponding to CL865 RF output; a
SMA connector has been soldered to the board in order to characterize the losses of the
transmission line including the connector itself. During Return Loss / impedance
measurements, the transmission line has been terminated to 50 Ω load.
Return Loss plot of line under test is shown below:
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Line input impedance (in Smith Chart format, once the line has been terminated to 50 Ω load)
is shown in the following figure:
Insertion Loss of G-CPW line plus SMA connector is shown below:
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7.3. Antenna - Installation Guidelines
Install the antenna in a place covered by the CDMA signal.
If the device antenna in the application is located greater then 20cm from the human
body and there are no co-located transmitters then the Telit FCC/IC approvals can be
re-used by the end product.
Antenna shall not be installed inside metal cases.
Antenna shall be installed also according to antenna manufacture instructions.
WARNING:
Consider a mechanical design and a low-capacitance ESD protection device to protect CL865
or customer specific requirements from ESD event to Antenna port (pin 34).
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8. USB Port
The CL865 module includes a Universal Serial Bus (USB) transceiver, which operates at
USB Full-speed (12Mbits/sec) and slave mode only.
It is compliant with the USB 2.0 specification and can be used for diagnostic monitoring,
control and data transfers.
The table below describes the USB interface signals:
Pin
Signal
I/O
Function
Type
18
USB_D+
I/O
USB differential Data(+)
17
USB_D-
I/O
USB differential Data(+)
16
USB_VUSB
I
Power for the internal USB transceiver
5V
The USB_DPLUS and USB_DMINUS signals have a clock rate of 60MHz. The signal traces
should be routed carefully. Trace lengths, number of vias and capacitive loading should be
minimized. The impedance value should be as close as possible to 100 Ohms differential.
The table below describes the VUSB specification:
Parameter
Min
Max
Input voltage
4.4V
5.0V
Input current
50mA
-
WARNING:
Consider a mechanical design and a low-capacitance ESD protection device to protect CL865
or customer specific requirements from ESD event to USB lines (Pin16, Pin17 and Pin18).
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9. Serial Port
The serial ports on the Telit CL865 are the interface between the module and OEM hardware.
2 serial ports are available on the module:
Modem Serial Port 1 (Main)
Modem Serial Port 2 (Auxiliary)
Several configurations can be designed for the serial port on the OEM hardware.
The most common are:
RS232 PC comport
Microcontroller UART@1.8V(Universal Asynchronous Receiver Transmit)
Microcontroller UART@5V or other voltages different from 1.8V
Depending on the type of serial port on the OEM hardware, a level translator circuit may be
needed to make the system work.
On the CL865 the ports are CMOS 1.8V.
The electrical characteristics of the serial port are explained in the following tables:
Absolute Maximum Ratings -Not Functional
Parameter
Min
Max
Input level on non-power pin with respect to ground
-0.3
+2.3V
Operating Range - Interface levels (1.8V CMOS)
Parameter
Min
Max
Input high level
1.5V
2.1 V
Input low level
0V
0.35V
Output high level
1.35V
1.8V
Output low level
0V
0.45V
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9.1. Modem Serial Port 1
The serial port 1 on the CL865 is a +1.8V UART with all 7 RS232 signals.
It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels.
RS232
Pin #
Signal
CL865
Pin No.
Function
Usage
1
C109/DCD
1
Data Carrier Detect
Output from the CL865 that
indicates the carrier presence
2
C104/RXD
8
Transmit line *see
Note
Output transmit line of the
CL865 UART
3
C103/TXD
7
Receive line *see
Note
Input receive of the CL865
UART
4
C108/DTR
4
Data Terminal Ready
Input to the CL865 that controls
the DTE READY condition
5
GND
-
-
GND
6
C107/DSR
3
Data Set Ready
Output from the CL865 that
indicates the module is ready
7
C106/CTS
6
Request to Send
Output from the CL865 that
controls the hardware flow
control
8
C105/RTS
5
Clear to Send
Input to the CL865 that controls
the hardware flow control
9
C125/RING
2
Ring Indicator
Output from the CL865 that
indicates the incoming call
condition
The following table shows the typical value(pulled inside the baseband chipset) and status for
input lines in all module states:
Signal/State
OFF
RESET
ON
Powersaving
PU tied to
TXD
unknown
Pull Down
(21K~210K)
Pull Up
(39K~390K)
Pull Up
(39K~390K)
1.8V
RTS
Pull Down
(21K~210K)
DTR
Pull Up
(39K~390K)
NOTE:
According to V.24, RX/TX signal names are referred to the application side. Therefore, on the
CL865 side these signals are on the opposite direction:
TXD on the application side will be connected to the receive line (here named C103/TXD)
RXD in the application side will be connected to the transmit line (here named C104/RXD)
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NOTE:
For minimum implementation, only the TXD and RXD lines must be connected, the other
lines can be left open provided a software flow control is implemented.
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 CL865 when the module is powered off or during
an ON/OFF transition.
NOTE:
High-speed UART supports up to 4Mbps. Please refer to the AT command User Guide in
detail.
WARNING:
Consider a mechanical design and a low-capacitance ESD protection device to protect CL865
or customer specific requirements from ESD event to UART port (Pin5, Pin6, Pin7 and Pin8).
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9.2. Modem Serial Port 2
The secondary serial port on the CL865 is a CMOS 1.8V with only RX and TX signals.
The signals of the CL865 serial port are:
CL865
Pin No.
Signal
I/O
Function
Type
45
TXD_AUX
O
Auxiliary UART (TX data to DTE)
CMOS 1.8V
44
RXD_AUX
I
Auxiliary UART (RX data from DTE)
CMOS 1.8V
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 CL865 when the module is powered off or during
an ON/OFF transition.
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9.3. RS232 Level Translation
In order to interface the Telit CL865 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 0/1.8V to +/-15V
Actually, the RS232 UART 16450, 16550, 16650 & 16750 chipsets accept signals with lower
levels on the RS232 side (EIA/TIA-562), allowing 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. The simplest way to translate the levels and invert
the signal is by using a single chip level translator. There is a multitude of them, differing in
the number of drivers and receivers and in the levels (be sure to get a true RS232 level
translator not a RS485 or other standards). By convention the driver is the level translator
from the 0-1.8V UART to the RS232 level. The receiver is the translator from the RS232
level to 0-1.8V UART.
In order to translate the whole set of control lines of the UART you will need:
5 drivers
3 receivers
An example of RS232 level adaption circuitry could be accomplished using a MAXIM
transceiver (MAX218). In this case the chipset is capable of translating directly from 1.8V to
the RS232 levels (Example on 4 signals only).
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The RS232 serial port lines are usually connected to a DB9 connector with the following
layout:
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10. Audio Section Overview
The CL865 provides an analog audio interface and digital audio interface.
10.1. Analog Audio Interface (AVI)
The CL865 provides an analog audio interface; one differential input for audio to be
transmitted(Uplink) and a balanced output for audio to be received(Downlink).
The bias for the microphone has to be as clean as possible; the first connection (single ended)
is preferable since the Vmic noise and ground noise are fed into the input as common mode
and then rejected. This sounds strange; usually the connection to use in order to reject the
common mode is the balanced one. In this situation we have to recall that the microphone is a
sound to current transducer, so the resistor is the current to tension transducer, so finally the
resistor feeds the input in balanced way even if the configuration, from a microphone point of
view, seems to be un-balanced.
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10.1.1. MIC Connection
If a “balanced way” is anyway desired, much more care has to be taken to VMIC noise and
ground noise.
TIP: Since the J-FET transistor inside the microphone acts as RF-detector-amplifier, ask
vendor for a microphone with anti-EMI capacitor (usually a 33pF or a 10pF capacitor placed
across the output terminals inside the case).
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10.1.2. EAR Connection
The audio output of the CL865 is balanced, this is helpful to double the level and to reject
common mode (click and pop are common mode and therefore rejected). These outputs can
drive directly a small loudspeaker with electrical impedance not lower than 32Ohm.
TIP: in order to get the maximum audio level at a given output voltage level (dBspl/Vrms),
the following breaking through procedure can be used. Have the loudspeaker as close as you
can to the listener (this simplify also the echo cancelling); choose the loudspeaker with the
higher sensitivity (dBspl per W); choose loudspeakers with the impedance close to the limit
in order to feed more power inside the transducer (it increases the W/Vrms ratio). If this were
not enough, an external amplifier should be used.
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10.2. Digital Voice Interface (DVI)
The product is providing one Digital Audio Interface (DVI) on the following Pins:
Pin
Signal
I/O
Function
Type
42
DVI_WA0
I/O
Digital Voice interface (WA0)
1.8V
41
DVI_RX
I
Digital Voice interface (RX)
40
DVI_TX
O
Digital Voice interface (TX)
39
DVI_CLK
I/O
Digital Voice interface (CLK)
10.2.1. CODEC Example
Please refer to the Digital Voice Interface Application note.
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11. General Purpose I/O
The CL865 module is provided by a set of Digital Input / Output pins
Input pads can only be read; they report the digital value (high or low) present on the pad at
the read time.
Output pads can only be written or queried and set the value of the pad output.
An alternate function pad is internally controlled by the CL865 firmware and acts depending
on the function implemented.
The following GPIOs are available on the CL865:
Pin
Signal
I/O
Function
Type
Default
State
Note
42
GPIO_01
I/O
Configurable GPIO
CMOS 1.8V
INPUT
Alternate function
DVI_WA0
41
GPIO_02
I/O
Configurable GPIO
CMOS 1.8V
INPUT
Alternate function
DVI_RX
40
GPIO_03
I/O
Configurable GPIO
CMOS 1.8V
INPUT
Alternate function
DVI_TX
39
GPIO_04
I/O
Configurable GPIO
CMOS 1.8V
INPUT
Alternate function
DVI_TX
29
GPIO_05
I/O
Configurable GPIO
CMOS 1.8V
INPUT
28
GPIO_06
I/O
Configurable GPIO
CMOS 1.8V
INPUT
Alternate function
ALARM
27
GPIO_07
I/O
Configurable GPIO
CMOS 1.8V
INPUT
Alternate function
26
GPIO_08
I/O
Configurable GPIO
CMOS 1.8V
INPUT
Alternate function
STAT_LED
WARNING:
During power up the GPIOs may be subject to transient glitches.
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11.1. Logic Level Specification
Where not specifically stated, all the interface circuits work at 1.8V CMOS logic levels.
The following table shows the logic level specifications used in the CL865 interface circuits:
Absolute Maximum Ratings -Not Functional
Parameter
Min
Max
Input level on any digital pin (CMOS 1.8) with respect to ground
-0.3V
2.3V
Operating Range - Interface levels (1.8V CMOS)
Parameter
Min
Max
Input high level
1.5V
2.1V
Input low level
0.0V
0.35V
Output high level
1.35V
1.8V
Output low level
0.0V
0.45V
Current characteristics
Parameter
Typical
Output Current
2mA
Input Current
30uA
11.2. Using a GPIO Pad as Input
The GPIO pads, when used as inputs, can be connected to a digital output of another device
and report its status, provided this device has interface levels compatible with the 1.8V
CMOS levels of the GPIO.
If the digital output of the device to be connected with the GPIO input pad has interface levels
different from the 1.8V CMOS, then it can be buffered with an open collector transistor with a
47KΩ pull-up resistor to 1.8V.
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 module when it is powered OFF or during an
ON/OFF transition.
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11.3. Using a GPIO Pad as Output
The GPIO pads, when used as outputs, can drive 1.8V 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.
11.4. Using the Alarm Output GPIO6
The GPIO6 pad, when configured as Alarm Output, is controlled by the CL865 module and
will rise when the alarm starts and fall after the issue of a dedicated AT command.
This output can be used to controlling microcontroller or application at the alarm time.
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11.5. Indication of Network Service Availability
The STAT_LED pin status shows information on the network service availability and Call
status. In the CL865 modules, the STAT_LED usually needs an external transistor to drive an
external LED. Because of the above, the status indicated in the following table is reversed
with respect to the pin status:
LED status
Device Status
Permanently off
Device off
Fast blinking
(Period 1s, Ton 0,5s)
Net search / Not registered / turning off
Slow blinking
(Period 3s, Ton 0,3s)
Registered full service
Permanently on
a call is active
A schematic example could be:
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11.6. RTC Bypass Output
The CL865 module is provided by an internal RTC section.
The RTC function of CL865 cannot be operated with VRTC only because the RTC section is
not an independent part in CL865 unlike other Telit’s products. So the external RTC backup
capacitor will be also useless and VBATT must be connected to the CL865 to use the RTC
feature.
VRTC is the supply for the internal RTC section and it is generated from VBATT inside the
CL865 so the customer must not connect any power supply to the VRTC pin of the CL865.
And the customers must not use VRTC for the power supply to any circuits or device in their
application board.
NOTE:
NO devices must be powered from this pin.
WARNING:
For CL865 the RTC feature cannot be operated with VRTC only so VBATT must be
connected to the CL865 to use the RTC function.
11.7. VAUX/PWRMON Power Output
A regulated power supply output is provided in order to supply small devices from the
module. This output is active when the module is ON and goes OFF when the module is shut
down. The operating range characteristics of the supply are:
Operating Range – VAUX/PWRMON power supply
Parameter
Min
Typical
Max
Output voltage
1.77V
1.8V
1.83V
Output current
100mA
Output bypass capacitor
(Inside the module)
2.2μF
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12. DAC and ADC Section
12.1. DAC converter
12.1.1. Description
The CL865 module provides a Digital to Analog Converter. The signal (named DAC_OUT)
is available on pin 15 of the CL865 module.
The on board DAC is in the range from 0 to 1023. However, an external low-pass filter is
necessary.
Parameter
Min
Max
Units
Voltage range (filtered)
0
1.8
Volt
Range
0
1023
Steps
The precision is 1023 steps, so since the maximum voltage is 1.8V, the integrated voltage
could be calculated with the following formula:
Integrated output voltage = 1.8 * value / 1023
DAC_OUT line must be integrated (for example with a low band pass filter) in order to obtain
an analog voltage.
12.1.2. Enabling DAC
An AT command is available to use the DAC function.
The command is: AT#DAC[=<enable>[,<value>]]
<value> - scale factor of the integrated output voltage (0..1023 ~ 10 bit precision)
it must be present if <enable>=1
Refer to SW User Guide or AT Commands Reference Guide for the full description of this
function.
NOTE:
The DAC frequency is selected internally. D/A converter must not be used during
POWERSAVING.
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12.1.3. Low Pass Filter Example
.
12.2. ADC converter
12.2.1. Description
The on board ADC is 12-bit converter. It is able to read a voltage level in the range of 0 ~ 1.2
volts applied on the ADC pin input and store and convert it into 12 bit word.
Parameter
Min
Max
Units
Input Voltage range
0
1.2
Volt
AD conversion
-
12
bits
Resolution
-
< 1
mV
Input Resistance
1
Mohm
The signal is available on the following pads:
PAD
Name
I/O
Description
Notes
13
ADC_IN1
AI
Analog/Digital converter input
Accepted values 0
to 1.2V DC
14
ADC_IN2
AI
Analog/Digital converter input
Accepted values 0
to 1.2V DC
12.2.2. Using ADC Converter
An AT command is available to use the ADC function.
The command is AT#ADC=1,2
The read value is expressed in mV
Refer to SW User Guide or AT Commands Reference Guide for the full description of this
function.
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13. Mounting the CL865 on your Board
13.1. General
The CL865 modules have been designed to be compliant with a standard lead-free SMT
process.
13.2. Module finishing & dimensions
Pin 1
Lead-free Alloy:
Surface finishing Ni/Au for all solder pads
Bottom View
Dimensions in mm
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13.3. Recommended foot print for the application
In order to easily rework the CL865 is suggested to consider on the application a 1.5 mm
placement inhibited area around the module.
It is also suggested, as common rule for an SMT component, to avoid having a mechanical
part of the application in direct contact with the module.
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13.4. Stencil
Stencil’s apertures layout can be the same of the recommended footprint (1:1), we suggest a
thickness of stencil foil ≥ 120µm.
13.5. PCB pad design
Non solder mask defined (NSMD) type is recommended for the solder pads on the PCB.
PCB
Copper Pad
Pad
Solder Mask
SMD
(Solder Mask Defined)
NSMD
(Non Solder Mask Defined)
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13.6. Recommendations for PCB pad dimensions
(mm):
It is not recommended to place via or micro-via not covered by solder resist in an area of 0.3 mm
around the pads unless it carries the same signal of the pad itself (see following figure).
Inhibit area for micro-via
Solder resist opening
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Holes in pad are allowed only for blind holes and not for through holes.
Recommendations for PCB pad surfaces:
Finish
Layer thickness [µm]
Properties
Electro-less Ni / Immersion Au
3 –7 / 0.05 – 0.15
good solder ability protection,
high shear force values
The PCB must be able to resist the higher temperatures which are occurring at the lead-free
process. This issue should be discussed with the PCB-supplier. Generally, the wettability of tin-
lead solder paste on the described surface plating is better compared to lead-free solder paste.
It is not necessary to panel the application PCB, however in that case it is suggested to use milled
contours and predrilled board breakouts; scoring or v-cut solutions are not recommended.
13.7. Solder paste
Lead free
Solder paste
Sn/Ag/Cu
We recommend using only “no clean” solder paste in order to avoid the cleaning of
the modules after assembly.
13.8. CL865 Solder reflow
Recommended solder reflow profile
TL
Tsmin
Tsmax
ts
tL
tp
ttp
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Profile Feature
Pb-Free Assembly
Average ramp-up rate (TL to TP)
3°C/second max
Preheat
– Temperature Min (Tsmin)
– Temperature Max (Tsmax)
– Time (min to max) (ts)
150°C
200°C
60-180 seconds
Tsmax to TL
– Ramp-up Rate
3°C/second max
Time maintained above:
– Temperature (TL)
– Time (tL)
217°C
60-150 seconds
Peak Temperature (Tp)
245 +0/-5°C
Time within 5°C of actual Peak
Temperature (tp)
10-30 seconds
Ramp-down Rate
6°C/second max.
Time 25°C to Peak Temperature (ttp)
8 minutes max.
NOTE:
All temperatures refer to topside of the package, measured on the package body
surface
WARNING:
The CL865 module withstands one reflow process only.
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13.9. Debug of the CL865 in production
To test and debug the mounting of the CL865, we strongly recommend foreseeing test pads on
the host PCB, in order to check the connection between the CL865 itself and the application
and to test the performance of the module connecting it with an external computer. Depending
by the customer application, these pads include, but are not limited to the following signals:
TXD
RXD
RESET*
GND
VBATT
VBATT_PA
TXD_AUX
RXD_AUX
PWRMON
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14. Packing system
14.1. Packing on tray
The CL865 modules are packaged on trays of 20 pieces each. These trays can be used in SMT
processes for pick & place handling.
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14.2. Moisture sensibility
The level of moisture sensibility of the Product is “3” according with standard IPC/JEDEC J-
STD-020, take care of all the relative requirements for using this kind of components.
Moreover, the customer has to take care of the following conditions:
a) The shelf life of the Product inside of the dry bag must be 12 months from the bag seal date,
when stored in a non-condensing atmospheric environment of <40°C / 90% RH
b) Environmental condition during the production: <= 30°C / 60% RH according to
IPC/JEDEC J-STD-033A paragraph 5
c) The maximum time between the opening of the sealed bag and the reflow process must be
168 hours if condition b) “IPC/JEDEC J-STD-033A paragraph 5.2” is respected
d) Baking is required if conditions b) or c) are not respected
e) Baking is required if the humidity indicator inside the bag indicates 10% RH or more
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15. Application Design Guide
15.1. Download and Debug Port
One of the following options should be chosen in the design of host system in order to
download or upgrade the Telit’s software and debug CL865 when CL865 is already mounted
on a host system.
CASE I:
Users who use both of UART and USB interfaces to communicate with CL865
- Must implement a download method in a host system for upgrading CL865 when it’s
mounted.
CASE II:
Users who use USB interface only to communicate with CL865
- Must arrange UART port in a host system for debugging or upgrading CL865 when it’s
mounted.
CASE III:
Users who use UART interface only to communicate with CL865
- Must arrange USB port in a host system for debugging or upgrading CL865 when it’s
mounted.
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16. Conformity Assessment Issues(Problèmes
d'évaluation de conformité)
The CL865 is FCC/IC Approved as module to be installed in other devices. This device
should be used only for fixed and mobile applications and if the final product after
integration is intended for portable use, a new application and FCC is required.
Le CL865 est approuvé FCC/IC comme module à installer dans d'autres dispositifs. Ce
dispositif doit être utilisé uniquement pour des applications fixes et mobiles et si le produit
fini est prévu après intégration pour un usage portatif, une nouvelle application et la FCC est
requise
The user is cautioned that this device should be used only as specified within this manual to
meet RF exposure requirements.
L'utilisateur est averti que ce dispositif doit être utilisé uniquement comme spécifié dans ce
manuel pour répondre aux normes d'exposition aux ondes rf.
Use of this device in a manner inconsistent with this manual could lead to excessive RF
exposure conditions.
L'utilisation de ce dispositif en quelque sorte contradictoire avec ce manuel a pu mener aux
états excessifs d'exposition de rf.
The CL865 is conforming to the following US Directives:
• Use of RF Spectrum. Standards: FCC47 Part 22, 24 & 90
• EMC Standards: FCC47 Part 15
Le CL865 est conforme aux directives suivantes des USA
• Utilisation de spectre de rf. Normes : FCC47 partie 22, 24 &90
• Normes d'EMC : FCC47 partie 15
This device complies with Part 15 of the FCC Rules.
Ce dispositif est conforme à la partie 15 des règles FCC.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference, including interference that may cause
undesired operation of the device.
Le fonctionnement est sujet aux deux conditions suivantes :
(1) ce dispositif peut ne pas causer l'interférence nocive, et
(2) ce dispositif doit accepter aucune interférence, y compris un interférence qui
pourrait causer le fonctionnement non désiré du dispositif.
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The user must refer to below information to meet the FCC/IC's RF exposure rules and
regulations when they design:
Lors de la conception, l'utilisateur doit se référer à l'information ci-dessous pour remplir les
conditions et règlementations FCC/IC' d’exposition aux ondes RF:
• The system antenna(s) used for this transmitter must be installed to provide a
separation distance of at least 20 cm from all the persons and must not be co-located
or operating in conjunction with any other antenna or transmitter.
Le système d’antenne utilisé pour cet émetteur doit être installé à une distance d’au
moins de 20 cm de toute personne et ne doit pas être co-implanté ou opérer en même
temps que n'importe quelle autre antenne ou émetteur.
• The system antenna(s) used for this module must not exceed 5.12dBi in CDMA
BC0&BC10 and 6.12dBi in CDMA BC1 for mobile and fixed or mobile operating
configurations.
Le système d’ antenne utilisé pour ce module ne doit pas dépasser 5.12dBi en
CDMA BC0&BC10 et 6.12dBi en CDMA BC1 pour des configurations mobiles et
fixes ou des configurations opérant en mode mobile.
• Users and installers must be provided with antenna installation instructions and
transmitter operating conditions for satisfying RF exposure compliance.
Manufacturers of mobile, fixed or portable devices incorporating this module are
advised to clarify any regulatory questions and to have their complete product tested
and approved for FCC compliance.
Les instructions d’installation de l’antenne ainsi que les conditions de
fonctionnement de l’émetteur doivent être remis aux utilisateurs et aux installateurs
conformément à la règlementation sur l’exposition aux ondes rf. Des fabricants des
dispositifs mobiles, fixes ou portables incorporant ce module sont invités à clarifier
toutes les questions de normalisation et à avoir leur produit complètement testé pour
la mise en conformité FCC.
• CL865 is intended for the OEM integrator only.
CL865 est prévu pour l'intégrateur OEM seulement.
• The user is required to see the Grant of Equipment document for other restrictions.
L'utilisateur doit se referrer au document « Grant of equipment » pour d'autres
restrictions.
• CL865 must be operated and used with a locally approved access point.
CL865 doit être actionné et utilisé avec un point d'accès localement approuvé.
• The radio transmitter(IC ID: 5131A- CL865DUAL) has been approved by Industry
Canada to operate with the antenna type listed in this manual with the maximum
permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain
indicated for that type, are strictly prohibited for use with this device.
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L'émetteur radio (identification d'IC : 5131A- CL865DUAL) a été approuvé par
Industry Canada pour fonctionner avec le type d'antenne énuméré dans ce manuel
avec le gain autorisé maximum et l'impédance d’antenne exigée pour chaque type
d'antenne indiqué. Les types d'antenne non inclus dans cette liste, ayant un gain
supérieur au gain maximum indiqué pour ce type, sont strictement interdits pour un
usage avec ce dispositif.
The following regulatory and safety notices must be published in documentation supplied
to the end user of the product or system incorporating an adapter in compliance with local
regulations.
• Host system including CL865 must be labeled with
“Contains transmitter module with
FCC ID: RI7CL865-DUAL and IC ID: 5131A-CL865DUAL”
Les notices de normalisation et de sécurité doivent se trouver dans la documentation
fournie à l'utilisateur du produit ou du système incorporant un adaptateur conforme aux
règlementations locales.
• Le système hôte comprenant CL865 doit être marqué avec « Contient un module
émetteur avec IDENTIFICATION FCC : RI7CL865-DUAL et identification IC :
5131A-CL865DUAL »
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17. 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 interfere with other electronic devices in environments such as hospitals,
airports, aircrafts, etc.
Where there is risk of explosion such as gasoline stations, oil refineries, etc. It is the
responsibility of the user to enforce the country’s regulations and the specific
environmental regulation.
Do not disassemble the product; any evidence of tampering will compromise the warranty
validity. Follow 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
conform to the security and fire prevention regulations. The product has to be handled with
care, avoiding any contact with the pads because electrostatic discharges may damage the
product itself.
The system integrator is responsible for the functioning of the final product; therefore, care
has to be taken with the external components of the module as well as of any project or
installation issue because of the risk of disturbing the CDMA network or external devices or
having impact on security. Should there be any doubt, please refer to the technical
documentation and the regulations 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 interference with other electronic devices and has to guarantee a minimum distance
from the body (20 cm). In case this requirement cannot be satisfied, the system integrator has
to assess the final product against SAR regulations.
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18. Document History
Revision
Date
Changes
0
2013-12-10
Initial release
1
2013-03-07
Updated 2.2 Product Specifications
Updated 6.2 Power Consumption
Updated 7.1 CDMA Antenna Requirements
Added 16 Conformity Assessment Issues

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