Texas Instruments orporated WL18SBMOD User Manual
WL1835MODCOM8B WLAN MIMO and
Bluetooth®Module Evaluation Board for TI
Sitara™ Platform
User's Guide
Literature Number: SWRU359C
September 2013–Revised January 2014
Contents
Preface ....................................................................................................................................... 3
1 Introduction ........................................................................................................................ 4
1.1 Features .................................................................................................................. 4
1.2 Applications .............................................................................................................. 5
1.3 TI Module Key Benefits ................................................................................................. 5
2 Board Pin Assignment ......................................................................................................... 6
2.1 Pin Descriptions ......................................................................................................... 7
3 Electrical Characteristics ..................................................................................................... 9
4 Antenna Characteristics ....................................................................................................... 9
4.1 VSWR ..................................................................................................................... 9
4.2 Efficiency ................................................................................................................ 10
5 Antenna Characteristics ..................................................................................................... 10
5.1 Radio Pattern ........................................................................................................... 10
6 Circuit Design ................................................................................................................... 14
6.1 Schematic ............................................................................................................... 14
6.2 Bill of Materials (BOM) ................................................................................................ 15
7 Layout Guidelines ............................................................................................................. 16
7.1 Board Layout ........................................................................................................... 16
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Table of Contents SWRU359C–September 2013–Revised January 2014
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About This Manual
This user's guide describes how to use the TI WL1835MODCOM8B board to evaluate the performance of
the TI WL18MODGB module.
Related Documentation From Texas Instruments
• TI WiLink8 Single-Band Combo Module – Wi-Fi, Bluetooth, and BLE (SWRS152)
• WiLink 8 Wiki: http://www.ti.com/wilink8wiki
If You Need Assistance
The primary sources of WL18MODGB information are the device-specific data sheets and user’s guides.
For the most up-to-date version of the user’s guide and data sheets, go to
http://www.ti.com/product/wl1835mod.
Warning
The WL1835MODCOM8B board is tested to comply with ETSI/R&TTE over temperatures from –20 to
+70°C.
This board should not be modified to operate in other frequency bands other than what they are designed
for.
FCC Licensing Requirements for EVM’s Wifi and Bluetooth Radio Module:
For evaluation only; not FCC approved for resale. This kit is designed to allow:
1. Product developers to evaluate electronic components, circuitry, or software associated with the kit to
determine whether to incorporate such items in a finished product
2. Software developers to write software applications for use with the end product. This kit is not a
finished product and when assembled may not be resold or otherwise marketed unless all required
FCC equipment authorizations are first obtained. Operation is subject to the condition that this product
not cause harmful interference to licensed radio stations and that this product accept harmful
interference. Unless the assembled kit is designed to operate under part 15, part 18, or part 95 of this
chapter, the operator of the kit must operate under the authority of an FCC license holder or must
secure an experimental authorization under part 5 of this chapter.”
Per TI’s Regulatory Compliance Information located in the WL1835ModCOMB8A User’s Guide’s
“Evaluation Board/Kit/Module (EVM) Additional Terms,” this EVM cannot be used for production purposes
and is explicitly restricted from end-product introduction.
Use of this EVM requires the developer to provide a minimum distance of at least 20 cm from the antenna
to all persons in order to minimize risk of potential radiation hazards.
Industry Canada Licensing Requirements:
The radio module is Industry Canada certified, but does not apply to the EVM. This EVM is not authorized
for sale or use inCanada unless special provisions are arranged between developer and Industry Canada.
Preface
SWRU359C–September 2013–Revised January 2014
Read This First
CAUTION
Do not leave the EVM powered when unattended.
SWRU359C–September 2013–Revised January 2014 Preface
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User's Guide
SWRU359C–September 2013–Revised January 2014
WL1835MODCOM8B WLAN MIMO and Bluetooth®Module
Evaluation Board for TI Sitara™ Platform
1 Introduction
The WL1835MODCOM8B device is a WiFi®MIMO, Bluetooth, and Bluetooth Low Energy (BLE) module
board with the TI WL18MODGB module. WL18MODGB is built-in TI WL1835 IEEE 802.11 b/g/n and
Bluetooth 4.0 solutions to provide the best WiFi and Bluetooth coexistence interoperability and powersaving technologies from TI.
1.1 Features
• WLAN, Bluetooth, BLE on a module board
• 100-pin board card
• Dimension 76.0 mm(L) x 31.0 mm(W)
• WLAN 2.4 GHz SISO (20- and 40-MHz channels), 2.4-GHz MIMO (20-MHz channels)
• Support for BLE dual mode
• Seamless integration with TI Sitara and other application processors
• Design for TI AM335X general-purpose EVM
• WLAN and Bluetooth, BLE cores are software and hardware compatible with prior WL127x, WL128x
and CC256x offerings, for smooth migration to device.
• Shared HCI transport for Bluetooth and BLE over UART and SDIO for WLAN.
• WiFi / Bluetooth single antenna co-existence
• Built-in chip antenna
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WL1835MODCOM8B WLAN MIMO and Bluetooth®Module Evaluation Board SWRU359C–September 2013–Revised January 2014
for TI Sitara™ Platform
Figure 1. WL1835MODCOM8B Top View
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• Optional U.FL RF connector for external 2.4-GHz band antenna
• Direct connection to battery using external switching mode power supply supporting 4.8-V to 2.9-V
operation
• VIO in the 1.8-V domain
1.2 Applications
• Internet of Things Multimedia
• Home Electronics
• Home Appliances and White Goods
• Industrial and Home Automation
• Smart Gateway and Metering
• Video Conferencing
• Video Camera and Security
1.3 TI Module Key Benefits
• Reduces Design Overhead: Single WiLink8™ Module Scales Across Wi-Fi and Bluetooth.
• WLAN High Throughput: 80 Mbps (TCP), 100 Mbps (UDP)
• Bluetooth 4.0 + BLE (Smart Ready)
• WiFi-Bluetooth Single Antenna Coexistence
• Low Power (30–50% Less than Previous Generation)
• Available as Easy-to-Use FCC, ETSI, and Telec Certified Module
• Lower Manufacturing Costs, Saving Board Space and Minimizing RF Expertise
• AM335x Linux®and Android™ Reference Platform Accelerates Customer Development and Time to
Market
Introduction
SWRU359C–September 2013–Revised January 2014 WL1835MODCOM8B WLAN MIMO and Bluetooth®Module Evaluation Board
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for TI Sitara™ Platform
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U1
WL18MODGB
Board Pin Assignment
2 Board Pin Assignment
www.ti.com
Figure 2. Board Top View
Figure 3. Board Bottom View
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WL1835MODCOM8B WLAN MIMO and Bluetooth®Module Evaluation Board SWRU359C–September 2013–Revised January 2014
for TI Sitara™ Platform
Copyright © 2013–2014, Texas Instruments Incorporated
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www.ti.com
2.1 Pin Descriptions
No. Name Type Description
1 SLOW_CLK I Slow clock input
2 GND G Ground
3 GND G Ground
4 WL_EN I WLAN Enable
5 VBAT P Power supply input
6 GND G Ground
7 VBAT P Power supply input
8 VIO P Power supply input for I/O pin
9 GND G Ground
10 N.C. No connection
11 WL_RS232_TX O WLAN tool RS232 output
12 N.C. No connection
13 WL_RS232_RX I WLAN tool RS232 input
14 N.C. No connection
15 WL_UART_DBG O WLAN Logger output
16 N.C. No connection
17 N.C. No connection
18 GND G Ground
19 GND G Ground
20 SDIO_CLK I WLAN SDIO clock
21 N.C. No connection
22 GND G Ground
23 N.C. No connection
24 SDIO_CMD I/O WLAN SDIO command
25 N.C. No connection
26 SDIO_D0 I/O WLAN SDIO data bit 0
27 N.C. No connection
28 SDIO_D1 I/O WLAN SDIO data bit 1
29 N.C. No connection
30 SDIO_D2 I/O WLAN SDIO data bit 2
31 N.C. No connection
32 SDIO_D3 I/O WLAN SDIO data bit 3
33 N.C. No connection
34 WLAN_IRQ O WLAN SDIO interrupt out
35 N.C. No connection
36 N.C. No connection
37 GND G Ground
38 N.C. No connection
39 N.C. No connection
40 N.C. No connection
41 N.C. No connection
42 GND G Ground
43 N.C. No connection
44 N.C. No connection
45 N.C. No connection
46 N.C. No connection
47 GND G Ground
Board Pin Assignment
SWRU359C–September 2013–Revised January 2014 WL1835MODCOM8B WLAN MIMO and Bluetooth®Module Evaluation Board for
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