Telit Wireless Solutions WL865E4-P User Manual
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Telit Wireless Solutions WL865E4-P User Manual

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WL865E4-P
HW User Guide
1VV0301580 Rev. 4 – 2019-08-08
Mod. 0805 2017-01 Rev.6

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Summary of Contents for Telit Wireless Solutions WL865E4-P

  • Page 1 WL865E4-P HW User Guide 1VV0301580 Rev. 4 – 2019-08-08 Mod. 0805 2017-01 Rev.6...

  • Page 2: Notice

    WL865E4-P Module Hardware User 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.

  • Page 3: Usage And Disclosure Restrictions

    WL865E4-P Module Hardware User Guide 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.

  • Page 4: Applicability Table (Remove Unused)

    WL865E4-P Module Hardware User Guide APPLICABILITY TABLE (REMOVE UNUSED) PRODUCTS WL865E4-P 1VV0301580 Rev. 4 Page 4 of 56 2019-08-08...

  • Page 5: Table Of Contents

    WL865E4-P Module Hardware User Guide Contents NOTICE COPYRIGHTS ....................2 COMPUTER SOFTWARE COPYRIGHTS ............2 USAGE AND DISCLOSURE RESTRICTIONS ..........3 License Agreements ..............3 Copyrighted Materials ..............3 III. High Risk Materials ............... 3 Trademarks .................. 3 Third Party Rights ................. 3 APPLICABILITY TABLE (REMOVE UNUSED) ..........
  • Page 6 WL865E4-P Module Hardware User Guide Communication ports ..............24 5.5.1. High Speed UART ..............24 5.5.2. Low Speed UART ............... 24 5.5.3. SDIO ................... 25 5.5.4. SPI....................25 5.5.5. I2C ....................25 5.5.6. USB .................... 25 General purpose I/O ..............25 ADC Converter ................
  • Page 7 WL865E4-P Module Hardware User Guide Footprint ..................42 PCB pad design ................42 PCB pad dimensions ..............43 Stencil ..................43 Solder paste ................43 Solder Reflow ................44 PACKAGING ................46 Tray .................... 46 Moisture sensitivity ..............47 CONFORMITY ASSESSMENT ISSUES ........48 FCC/IC Regulatory notices ............

  • Page 8: Introduction

    INTRODUCTION Scope The aim of this document is the description of some hardware solutions useful for developing a product with the Telit WL865E4-P module. Audience This document is intended for Telit customers, who are integrators, about to implement their applications using our WL865E4-P modules.

  • Page 9: Text Conventions

    WL865E4-P Module Hardware User Guide 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.

  • Page 10: Related Documents

    WL865E4-P Module Hardware User Guide Related Documents WL865E4-P AT Command Reference Guide WL865E4-P_EVB_User_Guide WL865_PCB_Antenna_Integration_Guide 1VV0301580 Rev. 4 Page 10 of 56 2019-08-08...

  • Page 11: Overview

    The aim of this document is the description of some hardware solutions useful for developing a product with the Telit WL865E4-P module. In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced.
  • Page 12 WL865E4-P Module Hardware User Guide 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.

  • Page 13: Pins Allocation

    WL865E4-P Module Hardware User Guide PINS ALLOCATION Pin-out Table Signal Function Type Comment USB HS 2.0 COMMUNICATION PORT VUSB Power Supply for the POWER Connect to internal USB transceiver. VDD_BLE USB_D- USB differential Data - Used only for programming and testing...
  • Page 14 WL865E4-P Module Hardware User Guide Serial Peripheral Interface (SPI) (cont…) SPI_M_MISO / GPIO_14 General Purpose VDD_VIO SPI MISO Input/Output (Master) SPI_M_MOSI / GPIO_13 General Purpose VDD_VIO SPI MOSI Input/Output (Master) Secure Digital Input Output (SDIO) SDIO_CLK / SPI_S_CLK SDIO card CLK signal...
  • Page 15 WL865E4-P Module Hardware User Guide Digital Audio Interface (I2S) Master/Slave I2S_SYNC / GPIO_28 I2S - Frame Sync or LR VDD_VIO Clock I2S_SCK / GPIO_30 I2S - Bit Clock VDD_VIO I2S_SDO / GPIO_31 I2S - Data Ouput VDD_VIO I2S_SDI / GPIO_29...
  • Page 16 WL865E4-P Module Hardware User Guide RF Pads ANT_BLE BT 2.4G 50 ohm ANT_WIFI WIFI 2.4G and 5G 50 ohm Power Supply VDD_WLAN WiFi main power supply Power (3.0V to 3.6V) 3.3V Nominal Power Supply VDD_VIO Digital Input/Output Power (1.8V to 3.6V) power supply 3.3V Nominal...

  • Page 17: Pads Layout

    WL865E4-P Module Hardware User Guide Pads Layout The figure 1 shows the pads layout configuration for the module (top view) Figure 1: Top View Pad Layout 1VV0301580 Rev. 4 Page 17 of 56 2019-08-08...

  • Page 18: Power Supply

    3.3V 3.46V USB_VDD 3.14V 3.3V 3.46V Recommended VDD_VIO (see notes) 1.71V 1.8V 1.89V Table 2: Wl865E4-P power supply requirements Note: The ADC can be used only if VDD_VIO is equal to 1V8. 1VV0301580 Rev. 4 Page 18 of 56 2019-08-08...
  • Page 19 54 Mbps BPSK MCS0_20 QPSK MCS1_20 QPSK MCS2_20 16 QAM MCS3_20 16 QAM MCS4_20 64 QAM MCS5_20 64 QAM MCS6_20 64 QAM MCS7_20 Table 3: WL865E4-P TX Table consumption @ 2.4 GHz 1VV0301580 Rev. 4 Page 19 of 56 2019-08-08...

  • Page 20: General Design Rules

    64 QAM MCS6_20 64 QAM MCS7_20 Table 4: WL865E4-P TX Table consumption @5GHz The equipment must be supplied by an external limited power source in compliance with the clause 2.5 of the standard EN 60950-1. General Design Rules It is recommended to provide at least 10µF capacitors right next to the VDD_WLAN and BT pins, and 2.2µF at each of the other power supply pins like VDD_VIO and VUSB.

  • Page 21: Digital Section

    WL865E4-P Module Hardware User Guide DIGITAL SECTION Logic Levels Parameter Input level on any digital pin -0.3V VDD_VIO + 0.3V Levels with VDD_VIO = 3.3V Input high level 2.4V 3.6V Input low level -0.3V 0.3V Output high level 3.0V 3.6V Output low level -0.3V...

  • Page 22: Power Up/Down Sequence

    10 µs before RESET# is de-asserted (that is, when greater than VIL for VDD_VIO). If VDD_VIO = 3.3V, then VDD_BLE, VDD_WLAN, and VDD_VIO can share same 3.3V power Figure 2: WL865E4-P P on RESET 5.2.1. Power-on reset timing...

  • Page 23: Periferals Interface Summary

    One Debug UART upto 115kbps HighSpeed One HSUART up to 3Mbps UART SensorADC 1 ADC, 12-bit, 1M samples/sec, 1.8Vinput. 3-channels single ended or 1 single +1 differential. 8-channels Co-existence PTA3-wire Table 7: WL865E4-P Periferals Interface Summary 1VV0301580 Rev. 4 Page 23 of 56 2019-08-08...

  • Page 24: Communication Ports

    WL865E4-P Module Hardware User Guide Communication ports 5.5.1. High Speed UART High-Speed Universal Asynchronous Receiver/Transmitter (HS-UART) interfaces, which may be configured to serve as either a host interface link or a debug message console. Property WL865E4-P Configuration Baud rate 115200 bps by default, no auto-baud rate detection, it can be...

  • Page 25: Sdio

    WL865E4-P Module Hardware User Guide 5.5.3. SDIO One SDIO Slave interface: • Compliant to SDIO v2.0 specification • Interface clock frequency up to 48 MHz • Data transfer modes: 4-bit SDIO, 1-bit SDIO, SPI 5.5.4. Two general-purpose SPI interfaces. One configured as master only and a second one can be configured as master or slave where pin-mux with SDIO interface pins.
  • Page 26 WL865E4-P Module Hardware User Guide GPIO Alternate Function Direction Internal PU/PD GPIO_07 I2C_SCL Output GPIO_08 LF_CLK_IN from an external 32KHz for Low Power Input Accurancy GPIO_09 WoW (Wakeup On Wireless) (PWM) Input GPIO_10 SW_RESET, WHATCH DOG, etc Input/Output GPIO_11 SPI_MASTER_CS...

  • Page 27: Adc Converter

    GPIO_35 SDIO_D2 (PWM) Input/Output PD GPIO_36 SDIO_D1 (PWM) Input/Output PD GPIO_37 SDIO_D0 (PWM) Input/Output PD Table 10: WL865E4-P GPIO Alternate Function ADC Converter • 12-bit ADC up to 1Msps • Alternatively 1 differential input, -1.75V to +1.75V, common mode 0.875V.
  • Page 28 WL865E4-P Module Hardware User Guide We strongly suggest using a dual supply buffer component for unidirectional signals like UART. Example of this are SN74AVC2T245, SN74AVC4T774 or SN74LVC2T45, for 5V signals. They are more immune to RF and are independent on Pull-Up or Pull-Down that could be present at any side of the voltage translator.

  • Page 29: Rf Section

    Frequency Range (GHz) Channel spacing (MHz) 2.401 ≤ Fc ≤ 2.495 WIFI 2.4 GHz 5.170 ≤ Fc ≤ 5.835 WIFI 5 GHz Table 11: WL865E4-P supported Frequency Bands for WiFi 6.1.2. BlueTooth Technology Frequency Range (GHz) Channel Number (k) 2.402 ≤ Fc ≤ 2.480 BLE 5 Fc=2402 + k ×...

  • Page 30: Tx Output Power

    MCS1_20 -15,6 QPSK MCS2_20 -16.0 16 QAM MCS3_20 -21,4 16 QAM MCS4_20 -21,5 64 QAM MCS5_20 -23,8 64 QAM MCS6_20 -27.0 64 QAM MCS7_20 -28,6 Table 43: WL865E4-P IEEE 802.11 EVM @2.4GHz 1VV0301580 Rev. 4 Page 30 of 56 2019-08-08...

  • Page 31: 5Ghz

    MCS5_20 -28.6 64 QAM MCS6_20 -30.3 64 QAM MCS7_20 -30.5 Table 54: WL865E4-P IEEE 802.11 EVM @5GHz 6.2.2. BlueTooth BLE Transmit power with at RF output Pad at 25 °C Packet Type Channel Number Output Power (dBm) LE 1M LE 2M Table 65: WL865E4-P BLE transmit power 1VV0301580 Rev.

  • Page 32: Rx Sensitivity

    WL865E4-P Module Hardware User Guide RX Sensitivity 6.3.1. WIFI 6.3.1.1. 2.4GHz WIFI 2G4 RX Sensibility Tested at RF output Pad at 25 °C WIFI 2G4 / CH 6 Modulation Data rates Sensibilty IEEE limit Standard 802.11x (dBm) (dB) BPSK 1 Mbps -96.5...

  • Page 33: 5Ghz

    6.3.2. BlueTooth RX Sensisbilty Tested at RF output Pad at 25 °C Packet Type Channel Number RX sensibility (dBm) LE 1M -97.1 LE 2M -94.3 Table 98: WL865E4-P Sensitivity at RF Output 1VV0301580 Rev. 4 Page 33 of 56 2019-08-08...

  • Page 34: Wifi Antenna Requirements

    RF performance degradation, and infringements of emission limits, may arise if the following recommendations are not respected. A 50Ω antenna is required. Telit’s WL865E4-P interface features an SMA connector for an external antenna, but other antenna integrated choices are possible, such as a chip or a printed one.
  • Page 35 WL865E4-P Module Hardware User Guide The position of the external antenna with respect to other boards is of maximum importance, since conductive planes close to antenna modify the impedance seen by the antenna and any board of the system must be RF proof, not only the modem board.

  • Page 36: Rf Pcb Guidelines

    6.7.2. RF PCB Guidelines The WL865E4-P module provides a 50Ω antenna pad, which has to be routed to the antenna connector (or the integrated antenna) by means of a transmission line. Keep as close ad possible to 50 Ω impedance in the RF track including the RF Pad. It is important to make RF trace equal or wider than the Pad width to avoid step impedance.
  • Page 37 WL865E4-P Module Hardware User Guide An example of a waveguide having the same width as the RF Pad are shown in figures below. Figure 4: Coplanar Waveguide dimensioning example Figure 5: Coplanar Waveguide calculation tool example Please pay attention to cut the GND plane close to the Antenna pad, otherwise you can change drastically the impedance value.
  • Page 38 WL865E4-P Module Hardware User Guide Figure 6: RF Track on EVB 1VV0301580 Rev. 4 Page 38 of 56 2019-08-08...

  • Page 39: Audio Section

    WL865E4-P Module Hardware User Guide AUDIO SECTION Electrical Characteristics The audio interface is only digital, through the I2S. The voltage of this interface pins have same electrical characteristics as for digital pins and are related to the power bank VDD_VIO.

  • Page 40: Mechanical Design

    WL865E4-P Module Hardware User Guide MECHANICAL DESIGN Drawing Figure 7: WL865E4-P Top and bottom side mechanical Drawing 1VV0301580 Rev. 4 Page 40 of 56 2019-08-08...
  • Page 41 WL865E4-P Module Hardware User Guide Figure 8: WL865E4-P side view 1VV0301580 Rev. 4 Page 41 of 56 2019-08-08...

  • Page 42: Application Pcb Design

    WL865E4-P Module Hardware User Guide APPLICATION PCB DESIGN Footprint Figure 9: WL865E4-P recommended footprint PCB pad design Non solder mask defined (NSMD) type is recommended for the solder pads on the PCB. Figure 10: SMD and NSMD PAD 1VV0301580 Rev. 4...

  • Page 43: Pcb Pad Dimensions

    WL865E4-P Module Hardware User Guide PCB pad dimensions 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).

  • Page 44: Solder Reflow

    WL865E4-P Module Hardware User Guide We recommend using only “no clean” solder paste in order to avoid the cleaning of the modules after assembly. Solder Reflow Recommended solder reflow profile Figure 12: Solder Reflow profile Profile Feature Pb-Free Assembly Average ramp-up rate (TL to TP) 3°C/second max...
  • Page 45 All temperatures refer to topside of the package, measured on the package body surface. WL865E4-P module withstands one reflow process only. Warning: The above solder reflow profile represents the typical SAC reflow limits and does not guarantee adequate adherence of the module to the customer application throughout the temperature range.

  • Page 46: Packaging

    WL865E4-P Module Hardware User Guide PACKAGING Tray The WL865E4-P modules are packaged on trays of 50 pieces each when small quantities are required (i.e. for test and evaluation purposes). Trays are not designed to be used in SMT processes for pick and place handling.

  • Page 47: Moisture Sensitivity

    WL865E4-P Module Hardware User Guide Caution or Warning –These trays can withstand at the maximum temperature of 65°C. Moisture sensitivity The moisture sensitivity level 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.

  • Page 48: Conformity Assessment Issues

    WL865E4-P Module Hardware User Guide CONFORMITY ASSESSMENT ISSUES FCC/IC Regulatory notices Hereby, Telit Communications S.p.A declares that the NB IOT Module is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: http://www.telit.com\red...

  • Page 49: Fcc/Ic Compliance

    WL865E4-P Module Hardware User Guide FCC/IC COMPLIANCE Modification statement Telit has not approved any changes or modifications to this device by the user. Any changes or modifications could void the user’s authority to operate the equipment. Telit n’approuve aucune modification apportée à l’appareil par l’utilisateur, quelle qu’en soit la nature.
  • Page 50 WL865E4-P Module Hardware User Guide radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the...
  • Page 51 WL865E4-P Module Hardware User Guide Label and compliance information The product has a FCC ID label on the device itself. Also, the OEM host end product manufacturer will be informed to display a label referring to the enclosed module. The exterior label will read as follows: “Contains Transmitter Module FCC ID: RI7WL865E4”...

  • Page 52: Safety Recommendations

    WL865E4-P Module Hardware User Guide 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: •...

  • Page 53: Acronyms

    WL865E4-P Module Hardware User Guide ACRONYMS Telit Technical Support Centre TTSC Universal Serial Bus High Speed Data Terminal Equipment Universal Mobile Telecommunication System UMTS Wideband Code Division Multiple Access WCDMA High Speed Downlink Packet Access HSDPA High Speed Uplink Packet Access...
  • Page 54 WL865E4-P Module Hardware User Guide Slave Ready SRDY Chip Select Real Time Clock Printed Circuit Board Equivalent Series Resistance Voltage Standing Wave Radio VSWR Vector Network Analyzer 1VV0301580 Rev. 4 Page 54 of 56 2019-08-08...

  • Page 55: Document History

    WL865E4-P Module Hardware User Guide DOCUMENT HISTORY Revision Date Changes 2017-12-15 First issue 2019-03-29 General Review of all chapters 2019-05-01 Minor changes 2019-07-02 Updated GPIO and RF tables 2019-08-08 Added FCC/IC COMPLIANCE 1VV0301580 Rev. 4 Page 55 of 56 2019-08-08...
  • Page 56 Mod. 0805 2017-01 Rev.6...

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