Telit WE866C3 User Manual

WE866C3

HW Design Guide

1VV0301495 Rev. 15 – 2021-03-31

WE866C3 Hardware Design Guide

SPECIFICATIONS ARE 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 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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WE866C3 Hardware Design Guide

USAGE AND DISCLOSURE RESTRICTIONS

I. 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.

II. 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

III. 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 HighRisk Activities.

IV. 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.

V. Third Party Rights

The software may include Third Party Right software. In this case you agree to comply with all terms and conditions imposed on you in respect of such separate software. In addition to Third Party Terms, the disclaimer of warranty and limitation of liability provisions in this License shall apply to the Third-Party Right software.

TELIT HEREBY DISCLAIMS ANY AND ALL WARRANTIES EXPRESS OR IMPLIED FROM ANY THIRD PARTIES REGARDING ANY SEPARATE FILES, ANY THIRD PARTY MATERIALS INCLUDED IN THE SOFTWARE, ANY THIRD PARTY MATERIALS FROM WHICH THE SOFTWARE IS DERIVED (COLLECTIVELY “OTHER CODE”), AND THE USE OF ANY OR ALL THE OTHER CODE IN CONNECTION WITH THE SOFTWARE, INCLUDING (WITHOUT LIMITATION) ANY WARRANTIES OF SATISFACTORY QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.

NO THIRD PARTY LICENSORS OF OTHER CODE SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND WHETHER MADE UNDER CONTRACT, TORT OR OTHER LEGAL THEORY, ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE OTHER CODE OR THE EXERCISE OF ANY RIGHTS GRANTED UNDER EITHER OR BOTH THIS LICENSE AND THE LEGAL TERMS APPLICABLE TO ANY SEPARATE FILES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

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WE866C3 Hardware Design Guide

WE866C3-P

APPLICABILITY TABLE

PRODUCTS

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NOTICE……………. ........................................................................................... 2

COPYRIGHTS .................................................................................................... 2

COMPUTER SOFTWARE COPYRIGHTS ........................................................ 2

USAGE AND DISCLOSURE RESTRICTIONS ................................................. 3

APPLICABILITY TABLE .................................................................................... 4

CONTENTS ........................................................................................................ 5

1. INTRODUCTION .............................................................................. 9

Scope ............................................................................................... 9

Audience........................................................................................... 9

Contact Information, Support ........................................................... 9

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

Related Documents ........................................................................ 11

2. GENERAL PRODUCT DESCRIPTION ......................................... 12

Overview......................................................................................... 12

Block Diagram ................................................................................ 12

Product Variants ............................................................................. 12

Target Market ................................................................................. 13

Main Features ................................................................................ 13

3. PINS ALLOCATION ...................................................................... 15

Pin Type Definition ......................................................................... 15

Pin-out ............................................................................................ 15

LGA Pads Layout ........................................................................... 17

4. POWER SUPPLY .......................................................................... 18

Power Supply Requirements ......................................................... 18

Power Consumption ....................................................................... 19

4.2.1. Typical Power Consumption for WLAN Low-Power States .......... 19

4.2.2. Typical Power Consumption for WLAN Continuous Rx [2.4 GHz] 19

4.2.3. Typical Power Consumption for WLAN Continuous Rx [5 GHz] ... 20

4.2.4. Typical Power Consumption for WLAN Continuous Tx [2.4 GHz] 20

4.2.5. Typical Power Consumption for WLAN Continuous Tx [5 GHz] ... 21

4.2.6. Typical Power consumption for BT ................................................ 21

Power Supply Sequencing ............................................................. 23

5. DIGITAL SPECIFICATION ............................................................ 24

DC Electrical Characteristics ......................................................... 24

Interface Ports and Signals ............................................................ 25

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5.2.1. WLAN Interfaces ............................................................................ 25

5.2.1.1. SDIO Interface................................................................................ 25

5.2.1.2. WL_EN ........................................................................................... 25

5.2.1.3. WOW .............................................................................................. 25

5.2.1.4. LF_CLK_IN ..................................................................................... 26

5.2.1.5. Coexistence Use Cases ................................................................. 26

BT Interface .................................................................................... 28

5.3.1.1. BT HCI-UART ................................................................................. 28

5.3.1.2. PCM/I2S ......................................................................................... 28

5.3.1.3. BT_EN ............................................................................................ 29

LE910Cx-WE866C3 Bundling Pin Map ......................................... 29

6. RF SPECIFICATION ...................................................................... 30

RF Frequencies .............................................................................. 30

Tx Output Power ............................................................................ 30

6.2.1. Tx Output Power at Room Temperature ....................................... 30

6.2.1.1. 802.11b (2.4GHz) ........................................................................... 30

6.2.1.2. 802.11g (2.4GHz) ........................................................................... 30

6.2.1.3. 802.11n, Channel BW = 20MHz (2.4GHz) .................................... 31

6.2.1.4. 802.11n, Channel BW = 40MHz (2.4GHz) .................................... 31

6.2.1.5. 802.11a (5GHz) .............................................................................. 31

6.2.1.6. 802.11n/ac, Channel BW = 20MHz (5GHz) .................................. 31

6.2.1.7. 802.11n/ac, Channel BW = 40MHz (5GHz) .................................. 32

6.2.1.8. 802.11ac, Channel BW = 80MHz (5GHz) ..................................... 32

6.2.1.9. Bluetooth TX Power ....................................................................... 32

6.2.2. Tx Output Power at Cold Temperature .......................................... 32

6.2.2.1. 802.11b (2.4GHz) ........................................................................... 32

6.2.2.2. 802.11g (2.4GHz) ........................................................................... 32

6.2.2.3. 802.11n, Channel BW = 20MHz (2.4GHz) .................................... 33

6.2.2.4. 802.11n, Channel BW = 40MHz (2.4GHz) .................................... 33

6.2.2.5. 802.11a (5GHz) .............................................................................. 33

6.2.2.6. 802.11n/ac, Channel BW = 20MHz (5GHz) .................................. 33

6.2.2.7. 802.11n/ac, Channel BW = 40MHz (5GHz) .................................. 34

6.2.2.8. 802.11ac, Channel BW = 80MHz (5GHz) ..................................... 34

6.2.3. Tx Output Power at Hot Temperature ........................................... 34

6.2.3.1. 802.11b (2.4GHz) ........................................................................... 34

6.2.3.2. 802.11g (2.4GHz) ........................................................................... 34

6.2.3.3. 802.11n, Channel BW = 20MHz (2.4GHz) .................................... 34

6.2.3.4. 802.11n, Channel BW = 40MHz (2.4GHz) .................................... 35

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6.2.3.5. 802.11a (5GHz) .............................................................................. 35

6.2.3.6. 802.11n/ac, Channel BW = 20MHz (5GHz) .................................. 35

6.2.3.7. 802.11n/ac, Channel BW = 40MHz (5GHz) .................................. 35

6.2.3.8. 802.11ac, Channel BW = 80MHz (5GHz) ..................................... 35

Receiver Sensitivity ........................................................................ 36

6.3.1. Receiver Sensitivity at Room Temperature ................................... 36

6.3.1.1. 802.11b (2.4GHz) ........................................................................... 36

6.3.1.2. 802.11g (2.4GHz) ........................................................................... 36

6.3.1.3. 802.11n, Channel BW = 20MHz (2.4GHz) .................................... 36

6.3.1.4. 802.11n, Channel BW = 40MHz (2.4GHz) .................................... 37

6.3.1.5. 802.11a (5GHz) .............................................................................. 37

6.3.1.6. 802.11n/ac, Channel BW = 20MHz (5GHz) .................................. 37

6.3.1.7. 802.11n/ac, Channel BW = 40MHz (5GHz) .................................. 37

6.3.1.8. 802.11ac, Channel BW = 80MHz (5GHz) ..................................... 38

6.3.1.9. Bluetooth (BER < 0.1%) ................................................................. 38

6.3.2. Receiver Sensitivity at Cold Temperature ..................................... 38

6.3.2.1. 802.11b (2.4GHz) ........................................................................... 38

6.3.2.2. 802.11g (2.4GHz) ........................................................................... 38

6.3.2.3. 802.11n, Channel BW = 20MHz (2.4GHz) .................................... 39

6.3.2.4. 802.11n, Channel BW = 40MHz (2.4GHz) .................................... 39

6.3.2.5. 802.11a (5GHz) .............................................................................. 39

6.3.2.6. 802.11n/ac, Channel BW = 20MHz (5GHz) .................................. 39

6.3.2.7. 802.11n/ac, Channel BW = 40MHz (5GHz) .................................. 40

6.3.2.8. 802.11ac, Channel BW = 80MHz (5GHz) ..................................... 40

6.3.3. Receiver Sensitivity at Hot Temperature ....................................... 40

6.3.3.1. 802.11b (2.4GHz) ........................................................................... 40

6.3.3.2. 802.11g (2.4GHz) ........................................................................... 40

6.3.3.3. 802.11n, Channel BW = 20MHz (2.4GHz) .................................... 40

6.3.3.4. 802.11n, Channel BW = 40MHz (2.4GHz) .................................... 41

6.3.3.5. 802.11a (5GHz) .............................................................................. 41

6.3.3.6. 802.11n/ac, Channel BW = 20MHz (5GHz) .................................. 41

6.3.3.7. 802.11n/ac, Channel BW = 40MHz (5GHz) .................................. 41

6.3.3.8. 802.11ac, Channel BW = 80MHz (5GHz) ..................................... 41

7. DESIGN GUIDELINES .................................................................. 42

General PCB Design Guidelines ................................................... 42

SDIO Interface................................................................................ 42

Voltage Regulator .......................................................................... 42

7.3.1. Recommended Regulators ............................................................ 42

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7.3.2. Regulator Operating Conditions .................................................... 43

7.3.3. ESD and Thermal Information ....................................................... 44

Antenna Requirements .................................................................. 45

7.4.1. Main Antenna ................................................................................. 45

7.4.2. Antenna Cable................................................................................ 45

7.4.3. Antenna Design .............................................................................. 46

7.4.4. Antenna Installation Guidelines ..................................................... 47

8. MECHANICAL DESIGN ................................................................ 48

Mechanical Dimensions ................................................................. 48

8.1.1. Mechanical Drawing ....................................................................... 48

8.1.1.1. Top View......................................................................................... 48

8.1.1.2. Bottom View ................................................................................... 49

8.1.1.3. Side View ....................................................................................... 50

9. APPLICATION PCB DESIGN ....................................................... 51

Recommended Footprint for the Application ................................. 51

PCB Pad Design ............................................................................ 52

PCB Pad Dimensions..................................................................... 53

Stencil ............................................................................................. 54

Solder Paste ................................................................................... 54

Cleaning ......................................................................................... 54

Solder Reflow ................................................................................. 55

10. PACKING SYSTEM ....................................................................... 56

Tray ................................................................................................ 56

Tray Drawing .................................................................................. 57

Moisture Sensitivity ........................................................................ 58

11. CONFORMITY ASSESSMENT ISSUES ...................................... 59

Declaration of Conformity .............................................................. 59

Product Regulatory Compliance Markings .................................... 59

12. SAFETY RECOMMENDATIONS .................................................. 60

READ CAREFULLY ....................................................................... 60

13. ACRONYMS .................................................................................. 61

14. DOCUMENT HISTORY ................................................................. 62

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WE866C3 Hardware Design Guide

1. INTRODUCTION

Scope

This document introduces the Telit WE866C3 module and presents possible and recommended hardware solutions for developing a product based on this module.

Obviously, this document cannot include every hardware solution or every product that can be designed. Where the suggested hardware configurations need not be considered mandatory, the information given should be used as a guide and a starting point for properly developing your product with the Telit module.

Audience

This document is intended for Telit customers, especially system integrators, about to implement their applications using the Telit module.

Contact Information, Support

For general contact, technical support services, technical questions and report documentation errors contact Telit Technical Support at:

• TS-EMEA@telit.com

• TS-AMERICAS@telit.com

• TS-APAC@telit.com

• TS-SRD@telit.com

Alternatively, use:

https://www.telit.com/contact-us/

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

https://www.telit.com

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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WE866C3 Hardware Design Guide

This information MUST be followed or catastrophic

Alerts the user to important points about

Provides advice and suggestions that may be

Text Conventions

Danger – equipment failure or bodily injury may occur.

Caution or Warning – integrating the module, if these points are not followed, the module and end user equipment may fail or malfunction.

Tip or Information – useful when integrating the module.

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

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WE866C3 Hardware Design Guide

2. GENERAL PRODUCT DESCRIPTION

Overview

The WE866C3 is a low power and low-cost WIFI/BT wireless module solution based on Qualcomm QCA9377-3. It supports 1×1 IEEE 802.11a/b/g/n/ac WLAN standards and BT

4.2 + HS + BLE, enabling seamless integration of WLAN/BT and low energy. It is a perfect companion solution for Telit cellular modules such as LE910Cx or LE920A4. WE866C3 supports low-power SDIO 3.0 interface for WLAN and a UART/PCM interface for BT. WE866C3 also supports BT-WLAN coexistence and uses the 2-wire ISM-LTE coexistence interface.

Block Diagram

The following figure shows a high-level block diagram of WE866C3 module and its major functional blocks.

• Power supply

• SDIO

• PCM and UART

• RF Antenna

Figure 1 WE866C3 Module Block Diagram

Product Variants

WE866C3 variants are listed below:

Product Description

WE866C3-P 1x1 WIFI/BT wireless module

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WE866C3 Hardware Design Guide

Target Market

WE866C3 can be used in IoT applications complementing client data availability coverage of the Cellular modems, with low power and low cost, for example:

• Bridging LTE / WLAN

• Industrial floor

• Healthcare instrument data terminals

• Smart Home automation and remote control

Main Features

Feature Specification

Power

Interfaces

Supported Data Rate

Main supply voltage: 3.3V

VIO supply voltage: 1.8V or 3.3V

WLAN SDIO 3.0

BT UART

BT PCM/I2S

LTE Coexistence UART (WCI)

Low frequency 32.768KHz sleep clock

Single Antenna port, 50 Ohm

Control signals

802.11a (5GHz): 6, 9, 12, 18, 24, 36, 48, 54Mbps

802.11b (2.4GHz): 1, 2, 5.5, 11Mbps

802.11g (2.4GHz): 6, 9, 12, 18, 24, 36, 48, 54Mbps

802.11n (2.4GHz/5GHz):

• 20Mhz BW: Up to 72.2Mbps using short GI (MCS0-7)

• 40Mhz BW: Up to 144.4Mbps using short GI (MCS0-7)

802.11ac (5GHz): HT20 (MCS0-8), VHT40 (MCS0-9), VHT80 (MCS0-9)

802.11a / 54Mbps: 14 dbm

802.11b / 11Mbps: 18 dbm

802.11g / 54Mbps: 15 dbm

Transmission Power

802.11n / HT20 (MCS7): 15 dbm

802.11ac / HT20 (MCS0): 15.5 dbm

802.11ac / VHT40 (MCS9): 11 dbm

802.11ac / VHT80 (MCS9): 10.5 dbm

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WE866C3 Hardware Design Guide

Data Standard

Operating Modes

IEEE 802.11a/b/g/n/ac

Access Point

Station

Modulation BPSK, QPSK, CCK, 16QAM, 64QAM, 256QAM

Size: 15±0.15 x 13±0.15 x 2.15±0.15 mm

Mechanical

Package: LGA

Weight: 1g

Temperature Range

Operating: -30°C to +85°C

Storage and non-operating: -40°C to +105°C

RoHS All hardware components are fully compliant with EU RoHS directive

Notes:

1) The module complies with IEEE standard.

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WE866C3 Hardware Design Guide

BT UART interface

BT_CTS

VIO

Bluetooth HCI-UART CTS signal

BT_RTS

VIO

Bluetooth HCI-UART RTS signal

BT_RXD

VIO

Bluetooth HCI-UART RXD signal

BT_TXD

VIO

Bluetooth HCI-UART TXD signal

BT PCM interface

BT_I2S_SDI

VIO

DI, PU

Bluetooth PCM/I2S Input signal, Internal Pull-Up

BT_I2S_WS

VIO B Bluetooth PCM/I2S Frame Sync signal

BT_I2S_SCK

VIO

B, PD

Bluetooth PCM/I2S Bit CLK signal

BT_I2S_SDO

VIO

Bluetooth PCM/I2S output signal

Low power Clock signal

LF_CLK_IN

VIO

DI, PD

External low–power 32.768 kHz clock input

Host wake pins

OD, PU

Wake on Wireless. WIFI/BT Wakeup host. Active Low, Internal Pull-Up

SDIO 3.0 interface

SDIO_CLK

VIO

DI, PU

SDIO clock signal Input, Internal Pull-Up

SDIO_CMD

VIO B SDIO CMD line signal

SDIO_D0

VIO B SDIO data bus D0

SDIO_D1

VIO B SDIO data bus D1

SDIO_D2

VIO

B, PU

SDIO data bus D2, Internal Pull-Up

SDIO_D3

VIO B SDIO data bus D3

signals

/ AUX UART RXD

Secondary UART - LTE coexistence UART_TXD / AUX_UART_TXD

3. PINS ALLOCATION

Pin Type Definition

Type Description

DI Digital Input

DO Digital Output

PD Pull-Down

PU Pull-Up

OD Open-Drain Output

B Bi-Directional

AI Analog/RF Input

AO Analog/RF Output

P Power Input

Note: Pins directions are with respect to the WE866C3 module.

Pin-out

Pin Pin Name

D4 WOW VIO

Pin Reference Voltage

Pin Type

Pin Description

Coexistence and control

C3 LTE_UART_RX VIO DI, PU

C4 LTE_UART_TX VIO DO

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Secondary UART - LTE coexistence UART RXD

WE866C3 Hardware Design Guide

WL_EN

VIO

DI, PD

WLAN enable (Active high)

BT_EN

VIO

DI, PD

Bluetooth enable (Active high)

RF Antennas

Antenna 1 - Main Antenna for modules with a single antenna configuration

RFU ANT2

Reserved for Antenna 2.

Power

VDD_3.3V

3.13 V to 3.46 V

Main Input voltage (WIFI & BT)

VDD_3.3V

3.13 V to 3.46 V

Main Input voltage (WIFI & BT)

VDDIO

1.8 V or 3.3 V

Voltage supply for all I/O signals (1.71V - 3.46V)

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

GND

– – Power Ground

Factory use

RFU