Telit Wireless Solutions WE865-DUAL Installation manual

WE865-DUAL Hardware User Guide
1vv0300787 Rev. 1 - 03/10/08

WE865-DUAL HW User Guide
1vv0300787 Rev. 1 - 03/10/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 2 of 48
This document is relating to the following products:
WE865DUA000-001

WE865-DUAL HW User Guide
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Contents
1Overview ...........................................................................................................................6
1.1Related documents ................................................................................................................7
2Mechanical description....................................................................................................8
3Pin-out.............................................................................................................................10
3.1Pin table.................................................................................................................................10
3.2Ball grid .................................................................................................................................12
4Electrical description .....................................................................................................13
4.1Power supply ........................................................................................................................13
4.1.1Unique supply voltage for WE865-DUAL and GE863-PRO3......................................................... 13
4.1.1.1Current consumption ................................................................................................................. 15
4.1.1.2Shut-down mode........................................................................................................................ 15
4.2Power supply design guidelines.........................................................................................16
4.2.1+5V input source............................................................................................................................ 17
4.2.2+12V input source.......................................................................................................................... 18
4.2.3Battery source................................................................................................................................ 20
4.3Reset signals ........................................................................................................................20
4.3.1Reset.............................................................................................................................................. 21
4.3.2Manual reset .................................................................................................................................. 22
4.4SDIO signals .........................................................................................................................23
5Thermal design guidelines ............................................................................................24
6PCB layout design guidelines.......................................................................................25
7Antenna...........................................................................................................................26
7.1Wi-Fi antenna guidelines .....................................................................................................26
7.2Wi-Fi antenna PCB trace guidelines ...................................................................................27
7.3Wi-Fi antenna installation guidelines .................................................................................28
8Integration with the GE863-PRO3..................................................................................29
8.1Power supply ........................................................................................................................30
8.2SDIO signals .........................................................................................................................31
9WE865-DUAL - Evaluation kit........................................................................................32
9.1WE865-DUAL Interface board..............................................................................................35
9.1.1Mechanical description .................................................................................................................. 35
9.1.2Main components .......................................................................................................................... 36
9.1.3Jumpers settings............................................................................................................................ 38

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9.1.4Pin table ......................................................................................................................................... 39
10Mounting the WE865-DUAL on the application board ................................................40
10.1Stencil....................................................................................................................................40
10.2PCB pad design ....................................................................................................................40
10.3Solder paste ..........................................................................................................................43
10.4Solder reflow.........................................................................................................................43
11Moisture sensitivity........................................................................................................45
12Conformity assessment issues ....................................................................................46
13Safety recommendations...............................................................................................47
14Document change log....................................................................................................48

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DISCLAIMER
The information contained in this document is proprietary information of Telit Communications S.p.A.
including its affiliates (“TELIT”). The contents are confidential and any disclosure to persons other than
the Officers, employees, agents or subcontractors of the owner or licensee of this document, without
the prior written consent of Telit, is strictly prohibited.
Telit makes every effort to ensure the quality of the information it makes available. Notwithstanding the
foregoing, Telit does not make any warranty as to the information contained herein, and does not
accept any liability for any injury, loss or damage of any kind incurred by use of or reliance upon the
information.
Telit disclaims any and all responsibility for the application of the devices characterized in this
document, and notes that the application of the device must comply with the safety standards of the
applicable country, and where applicable, with the relevant wiring rules.
Telit reserves the right to make modifications, additions and deletions to this document due to
typographical errors, inaccurate information, or improvements to programs and/or equipment at any
time without a notice. Such changes will, nevertheless be incorporated into new editions of this
document.
All rights reserved.
© 2008 Telit Communications S.p.A.

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1 Overview
This document is a user guide for developing a wireless application which integrates the Telit WE865-
DUAL with the GE863-PRO3GSM/GPRS module creating a unique solution for a short and long
range.
This document cannot embrace the whole hardware solutions and products that may be designed.
The information given is a guide line and a starting point for properly developing products with the Telit
WE865-DUAL module.
For further hardware details please refer to the Telit “WE865-DUAL Product Description” document.
NOTICE
(EN) The integration of the Wi-Fi WE865-DUAL module within user application shall be done according
to the design rules described in this manual.
(IT) L’integrazione del modulo Wi-Fi WE865-DUAL all’interno dell’applicazione dell’utente dovrà
rispettare le indicazioni progettuali descritte in questo manuale.
(DE) Die integration des Wi-Fi WE865-DUAL Moduls in ein Gerät muß gemäß der in diesem Dokument
beschriebenen Kunstruktionsregeln erfolgen.
(SL) Integracija Wi-Fi WE865-DUAL modula v uporabniški aplikaciji bo morala upoštevati
projektna navodila, opisana v tem piročniku.
(SP) La utilización del modulo Wi-Fi WE865-DUAL debe ser conforme a los usos para los cuales ha
sido deseñado descritos en este manual del usuario.
(FR) L’intégration du module Wi-Fi WE865-DUAL dans l’application de l’utilisateur
sera faite selon les règles de conception décri tes dans ce manuel.
הםדומ לש היצרגטניאה ךילהתהב הז ךמסמב תוטרופמה תויחנהה תא םשייל שקבתמ רוטרגטניאה–Wi-Fi WE865-DUAL
רצומה םע
The information presented in this document is believed to be accurate and reliable. However, no responsibility is
Assumed by Telit Communications S.p.A. for its use, nor any infringement of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent rights of
Telit Communications S.p.A. other than for circuitry embodied in Telit products. This document is subject to
change without notice.

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1.1 Related documents
The following documents are related to this user guide:
[1] Telit WE865-DUAL Product Description 80312ST10046A
[2] Telit WE865-DUAL Software User Guide 1vv0300788
[3] Telit GE863-PRO³ Hardware User Guide 1vv0300773a
[4] Telit GE863-PRO³ Software User Guide 1vv0300788
[5] Telit GE863PRO3EVK User Guide 1vv0300776
[6] Telit GE863PRO3Linux SW User Guide 1vv0300781
[7] Telit GE863PRO3Linux Development Environment User Guide1vv0300780
All documentation can be downloaded from Telit’s official web site www.telit.com if not otherwise
indicated.

WE865-DUAL HW User Guide
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2 Mechanical description
The Telit WE865-DUAL module overall dimensions are:
•Length: 22.15 mm (max)
•Width: 22.15 mm (max)
•Thickness: 3.48 mm (max)
•Weight 3.5 g
Figure 1

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Figure 2 (Bottom side)

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3 Pin-out
3.1 Pin table
Ball Signal I/O Function Internal PULL
UP/DOWN Type
SDIO
A1 SDIO[0] I/O SDIO DATA[0] (or SPI MISO) 10KOhm pull-up SDIO (or SPI)
B2 SDIO[1]
I/O SDIO DATA[1]
(or SPI INTERRUPT) 10KOhm pull-up SDIO (or SPI)
A2 SDIO[2] I/O SDIO DATA[2] 10KOhm pull-up SDIO
B3 SDIO[3]
I/O SDIO DATA[3]
(or SPI CHIP SELECT) 10KOhm pull-up SDIO (or SPI)
A3 SDIO_CLK
I/O SDIO CLOCK
(or SPI CLOCK) - SDIO (or SPI)
A4 SDIO_CMD I/O SDIO CMD (or SPI MOSI ) 10KOhm pull-up SDIO (or SPI)
Testing and Certification
C3 TEST_1 O Test line n. 1 - TEST
C4 TEST_2 I Test line n. 2 - TEST
C5 TEST_3 I Test line n. 3 - TEST
D5 TEST_4 I Test line n. 4 - TEST
Miscellaneous Functions
B1 EN_A* I Enable/shut-down 10KOhm pull-up control
C1 MR_RESET* I Manual reset
100KOhm pull-
up control
D1 EN_B* I Enable/shut-down 10KOhm pull-up control
D2 RESET I Reset for host processor
47KOhm pull-
down control
H5 RF_ANT RF RF output - antenna
Power Supply
E1 VDD PWR Power input pin - power supply
E2 VDD PWR Power input pin - power supply
F1 VCC_A PWR Power input pin - power supply
F2 VCC_A PWR Power input pin - power supply
F3 VCC_A PWR Power input pin - power supply
RESERVED1
A5 N.C.
A6 N.C.
1All the reserved pins must be kept not connected (N.C.)

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Ball Signal I/O Function Internal PULL
UP/DOWN Type
A7 N.C.
A8 N.C.
B4 N.C.
B5 N.C.
B6 N.C.
B7 N.C.
B8 N.C.
C5 N.C.
C6 N.C.
C8 N.C.
D3 N.C.
D4 N.C.
D6 N.C.
D7 N.C.
D8 N.C.
E3 N.C.
E4 N.C.
E6 N.C.
E8 N.C.
F4 N.C.
F5 N.C.
F6 N.C.
F7 N.C.
F8 N.C.
G2 N.C.
G6 N.C.
G7 N.C.
G8 N.C.
H1 N.C.
H2 N.C.
H4 N.C.
H7 N.C.
H8 N.C.
Table 1

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3.2 Ball grid
A B C D E F G H
1 SDIO[0] EN_A* MR_RESET* EN_B* VDD VCC_A GND NC
2 SDIO[2] SDIO[1] GND RESET VDD VCC_A NC NC
3 SDIO_CLK SDIO[3] TEST_1 NC NC VCC_A GND GND
4 SDIO_CMD NC TEST_2 NC NC NC GND NC
5 NC NC TEST_3 TEST_4 GND NC GND RF_ANT
6 NC NC NC NC NC NC NC GND
7 NC NC GND NC GND NC NC NC
8 NC NC NC NC NC NC NC NC
Table 2
NOTE: The drawing above is a top view.

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4 Electrical description
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 performances, hence read carefully the requirements and
the guidelines that will follow for a proper design.
4.1 Power supply
Powering of the module:
•wide range voltage operation from 3.4V up to 4.2V (typical voltage 3.8V) the same as
for GE863-PRO3.
The above voltage range is chosen in order to use the same voltage range for the Wi-Fi module
WE865-DUAL and the GE863-PRO3.
4.1.1 Unique supply voltage for WE865-DUAL and GE863-PRO3
In order to get the suitable voltage range valid for both WE865-DUAL and GE863-PRO3certain balls
need to be connected as described below.
signal ball 3.8V (typ)
F1 √
F2 √
VCC_A
F3 √
E1 √
VDD E2 √
Table 3

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Figure 3
The table below shows the operating and absolute voltage ranges.
VOLTAGE RANGES @ 25 °C
Min [V] Typ [V] Max [V]
Operating range 3.4 3.8 4.2
Table 4
VCC_A
(
F1
)
VCC
_
A
(
F2
)
VCC
_
A
(
F3
)
3.8 V (typ)
VDD
(
E1
)
VDD
(
E2
)
WE865-DUAL

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4.1.1.1 Current consumption
CURRENT CONSUMPTION @ 3.8V at 25 °C
Operating mode Typ Unit
Continuous Receive 100 mA
Continuous Transmit (maximum output power) 180 mA
Stand-by (receive beacons every 100 ms) 5 mA
Deep Sleep 3 mA
Shut-down mode <1 mA
Table 5
NOTE: continuous receive and transmit mode measures were taken at channel 6.
4.1.1.2 Shut-down mode
In order to minimize the current consumption it is possible to completely shut-down the WE865-DUAL.
That is achieved by acting on the relevant signal outside the module, which directly acts on the power
device enable/Shut-down signals.
The shut-down is achievable by driving low both the EN_B* (ball D1) and EN_A* (ball B1) signals, to
be connected together.
As EN_B* (ball D1) and EN_A* (ball B1) are internally connected to pull-up, do not drive these signals
during normal operation.
LOGIC CONFIGURATION
signal ball Shut-down mode Operating mode
EN_A* B1 to be driven low internally pulled-up 2
EN_B* D1 to be driven low internally pulled-up 1
Table 6
2If the shut-down mode is not used, no external connection is needed.

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VOLTAGE LEVELS @ 25 °C
VIL
SIGNAL Min [V] Max [V]
EN_A*, EN_B* 0 0.20
Table 7
Figure 4
4.2 Power supply design guidelines
The power supply circuitry is a very important part in the full product design and it strongly affects the
product overall performances, hence read carefully the requirements and the guidelines that will follow
for a proper design.
The table below shows the WE865-DUAL operating voltage range:
VOLTAGE RANGE
Nominal Supply Voltage 3.8V
Minimum Supply Voltage 3.4V
Max Supply Voltage 4.2V
Table 8
The electrical design of the power supply strongly depends on the power source the current is drained
from. Please refer to electrical design guidelines in the GE863-PRO3Hardware User Guide for further
information.
WE865-DUAL
EN_B*
EN_A*

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4.2.1 +5V input source
A linear regulator can be used to generate the 3.8V output voltage. When using a linear regulator, a
proper heat sink shall be provided in order to dissipate the generated power. A protection diode should
be inserted close to the power input, in order to save the WE865-DUAL from power polarity inversion.
This can be the same diode as for spike protection.
The figure below shows a possible solution for the switching power supply. It must be taken into
account that the power supply performance strongly depends on the layout design.
Figure 5

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4.2.2 +12V input source
Due to the big difference between the input source and the desired output voltage, a linear voltage
regulator is not suited and not recommended. A switching power supply will be preferable because of
its better efficiency especially in presence of peak current load.
When using a switching regulator, 500 kHz switching frequency (or more) is preferable because of its
smaller inductor size and its faster transient response. This allows the regulator to respond quickly to
any current peak absorption.
A protection diode should be inserted close to the power input, in order to save the WE865-DUAL from
power polarity inversion. This can be the same diode as for spike protection.
The figure below shows a possible solution for the switching power supply. It must be taken into
consideration that the switching power supply performances strongly depend on the layout design.

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Figure 6

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4.2.3 Battery source
The desired nominal output for the power supply is 3.8V and the maximum voltage allowed is 4.2V,
thus a single 3.7V Li-Ion cell battery type is suited for supplying the power to the WE865-DUAL
module.
Please refer to GE863-PRO3electrical design guidelines for further information regarding type
and battery usage.
A protection diode should be inserted close to the power input, in order to save the WE865-DUAL from
power polarity inversion. Otherwise the battery connector should be done in a way to avoid polarity
inversions when connecting the battery.
When integrating the GE863-PRO3 with the WE865-DUAL modules together in the user application,
take into account that battery charger control circuitry is embedded inside the GE863-PRO3(please
refer to GE863-PRO3Hardware User Guide for more details) and can be used with Li-ION batteries
only. Using other type of batteries, an external charger will be needed.
The battery capacity should be suitable chosen dependently on the customer’s application current
consumption and the battery life requirements. When integrating the GE863-PRO3 with the WE865-
DUAL modules together in the user application, the battery capacity must be at least 800mAh in order
to withstand any current peak (please refer to GE863-PRO3Hardware User Guide for more details).
4.3 Reset signals
The WE865-DUAL has a power-on-reset (POR) circuit inside, so no specific reset is required in the
initialization phase.
Two signals are available to reset the module:
•an active high host reset (RESET)
•an active low manual reset (MR_RESET*)
In addition to the active high RESET signal issued by the host system (GE863-PRO3), a reset button
can be integrated in the customer application.
Even if it is not mandatory to drive the available reset lines in the module, it is recommended to
employ those signals to prevent critical situations.
When resetting during normal operation, after the release of the reset the module is unconditionally
shut down, without doing any detach operation from the network where it is associated.