Laird LSR Sterling-LWB5 User manual

A
User Guide
Sterling-LWB(5) SD Card Board
Version 1.1

Sterling-LWB(5) SD Card Board
User Guide
Embedded Wireless Solutions Support
Center: http://ews-support.lairdtech.com
www.lairdtech.com/wireless
330-0245-R1.1
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© Copyright 2017 Laird. All Rights Reserved
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REVISION HISTORY
Version
Date
Notes
Approver
1.0
12 April 2017
Initial Release
Andrew Dobbing
1.1
14 Nov 2017
Added Sterling-LWB5 SD Card
Robert Gosewehr

Sterling-LWB(5) SD Card Board
User Guide
Embedded Wireless Solutions Support
Center: http://ews-support.lairdtech.com
www.lairdtech.com/wireless
330-0245-R1.1
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© Copyright 2017 Laird. All Rights Reserved
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CONTENTS
1Introduction........................................................................................................................................................4
1.1. Purpose and Scope .........................................................................................................................................4
1.2. Applicable Documents....................................................................................................................................4
2Sterling-LWB (5) SD Card Board Description ......................................................................................................4
3Sterling-LWB (5) SD Card Board Hardware.........................................................................................................6
3.1. Interface Connectors......................................................................................................................................6
3.2. Development Board Power ............................................................................................................................7
4Development Board Host Software Configuration.............................................................................................8
5Contacting Laird..................................................................................................................................................9

Sterling-LWB(5) SD Card Board
User Guide
Embedded Wireless Solutions Support
Center: http://ews-support.lairdtech.com
www.lairdtech.com/wireless
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© Copyright 2017 Laird. All Rights Reserved
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1INTRODUCTION
1.1. Purpose and Scope
The purpose of this document is to provide details regarding the setup of the Sterling-LWB and Sterling-LWB5
module on the SD card board. This document covers a description of the SD card board and its features.
1.2. Applicable Documents
The following documents are available from the Sterling-LWB product page:
▪Sterling-LWB Datasheet
▪How-to Guide –Integrating Laird Sterling-LWB Wi-Fi and Bluetooth with Freescale i.MX 6 UltraLite
Evaluation Kit Under Linux
The following documents are available from the Sterling-LWB5 product page:
▪Sterling-LWB5 Datasheet
▪Sterling-LWB5 Application Guide
▪How-to Guide –Integrating Laird Sterling-LWB Wi-Fi and Bluetooth with Freescale i.MX 6 UltraLite
Evaluation Kit Under Linux –Note: This guide also works for the Sterling-LWB5.
2STERLING-LWB (5) SD CARD BOARD DESCRIPTION
The Sterling-LWB & Sterling-LWB5 SD Card development board is an evaluation and development board for the
Laird Sterling-LWB and Sterling-LWB5 module. It connects to a standard SDIO card slot on a host board and can
be powered directly from the SD card slot or from an external power supply. Additionally, it brings out all
necessary GPIO pins for Wi-Fi operation and all necessary pins for Bluetooth operation including PCM audio pins.
This allows the board to be connected to any development board with an available SD card slot. The board
allows for quick prototyping of designs using the Laird Sterling-LWB and Sterling-LWB5 modules.
Figure 1: Sterling-LWB Chip Antenna SD card board

Sterling-LWB(5) SD Card Board
User Guide
Embedded Wireless Solutions Support
Center: http://ews-support.lairdtech.com
www.lairdtech.com/wireless
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© Copyright 2017 Laird. All Rights Reserved
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Figure 2: Sterling-LWB U.FL SD card board
Figure 3: Sterling-LWB5 Chip Antenna SD card board
Figure 4: Sterling-LWB5 U.FL SD card board

Sterling-LWB(5) SD Card Board
User Guide
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3STERLING-LWB (5) SD CARD BOARD HARDWARE
See the LSR website for the full PCB, schematic, and BOM of the Sterling-LWB & Sterling-LWB5 SD card board:
Sterling-LWB
https://www.lsr.com/embedded-wireless-modules/wifi-plus-bluetooth-module/sterling-lwb
Sterling-LWB5
https://www.lsr.com/embedded-wireless-modules/wifi-plus-bluetooth-module/sterling-lwb5
3.1. Interface Connectors
The Laird Sterling-LWB and Sterling-LWB5 SD card board has two connectors (J2 and J3) for interfacing with the
host development board. This provides all necessary pins to completely connect the module to the host for both
Wi-Fi and Bluetooth operation.
Figure 5: Sterling-LWB SD card board connectors
Table 1: Connector J2 pinout
J2 Pin
Number
Pin Name
Description
1
VIN_3V3
3.3V Input Voltage
2
WIFI_GPIO_1
Wi-Fi GPIO 1 from the module
3
WL_HOST_WAKE
Wi-Fi host wake signal
4
WIFI_GPIO_2
Wi-Fi GPIO 2 from the module
5
NC
No Connect
6
WIFI_GPIO_3
Wi-Fi GPIO 3 from the module
7
NC
No Connect
8
BT_GPIO_5
Bluetooth GPIO 5 from the module
9
EXT_32KHZ_CLK
32KHz Clock
10
WIFI_GPIO_4
Wi-Fi GPIO 4 from the module
11
CLK_REQ
Wi-Fi SDIO clock request
12
NC
No Connect
13
NC
No Connect
14
NC
No Connect
15
NC
No Connect
16
GND
Ground

Sterling-LWB(5) SD Card Board
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Table 2: Connector J3 pinout
J3 Pin
Number
Pin Name
Description
1
VIN_EXT
External Supply Voltage
2
VCC_IO_EXT
External I/O Voltage Supply
3
BT_HOST_WAKE
Bluetooth host wake signal from module
4
BT_PCM_CLK
PCM Clock Input
5
BT_PCM_SYNC
PCM Frame Synch Signal
6
BT_UART_CTS_HST_RTS
Module Bluetooth UART CTS signal (host RTS signal)
7
BT_PCM_IN
PCM Input Signal
8
BT_UART_TXD_HOST_RXD
Module Bluetooth UART transmit pin (host receive pin)
9
BT_PCM_OUT
PCM Output Signal
10
BT_UART_RXD_HST_TXD
Module Bluetooth UART receive pin (host transmit pin)
11
WLREG_ON
Wi-Fi Enable
12
NC
Not Connected
13
BT_REG_ON
Module Bluetooth enable signal
14
BT_UART_RTS_HST_CTS
Module Bluetooth UART RTS signal (host CTS signal)
15
BT_DEV_WAKE
Bluetooth device wake signal from host
16
GND
Ground
Note: Pin Layout is the same for the Sterling-LWB5 version of the SD Card
3.2. Development Board Power
The Sterling-LWB & Sterling-LWB5 SD card boards provide two possible sources for powering the board 3.3V.
Power can be provided from an external power supply on J5 or from the SD card bus (Pin 4). Jumper J7 is used to
select which power supply is used. Sterling-LWB is setup in the 3.3V position when shipped.
Note: The Sterling-LWB5 SD Card will need to be powered with a secondary power supply at 1.8V to J3 Pin 2
(VCC_IO_EXT) and Pin 16 (GND). 3.3V is for WiFi and 1.8V is for I/O pins. The Sterling-LWB and Sterling-LWB5 SD
Cards utilize the same PCBA and because of this the silkscreen will show 3.3V on Jumper J4. Sterling-LWB
supports both VIO voltages of 3.3V and 1.8V. Sterling-LWB5 only operates at VIO of 1.8V.
To decide which power supply is best for you, check with the manufacturer of your host development board to
determine the maximum current for the power supply used for the SD card slot. If this is too low, consider
powering the board externally. See the Sterling-LWB and Sterling-LWB5 module datasheets for power supply
requirements of the module in various operating modes.

Sterling-LWB(5) SD Card Board
User Guide
Embedded Wireless Solutions Support
Center: http://ews-support.lairdtech.com
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Figure 6: Sterling-LWB SD card board external power connector
4DEVELOPMENT BOARD HOST SOFTWARE CONFIGURATION
The SD card board can be tested on various development boards that have a free SD card slot, a free UART, and
two free GPIOs (at a minimum) for basic Wi-Fi and BT operation. The host must also have a PCM audio port
available for BT audio.
For detailed information on how to integrate the Sterling-LWB module into an iMX UltraLite development board,
refer to the Integrating Laird Sterling-LWB Wi-Fi and Bluetooth with Freescale i.MX 6 UltraLite Evaluation Kit
Under Linux How-to Guide available from the Sterling-LWB product page. This guide will also work with the
Sterling-LWB5 SD Card.

Sterling-LWB(5) SD Card Board
User Guide
Embedded Wireless Solutions Support
Center: http://ews-support.lairdtech.com
www.lairdtech.com/wireless
330-0245-R1.1
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© Copyright 2017 Laird. All Rights Reserved
Americas: [phone]
Europe: [phone]
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5CONTACTING LAIRD
Headquarters Laird
W66 N220 Commerce Court
Cedarburg, WI 53012-2636
USA
Tel: [phone]
` Fax: [phone]
Website https://www.lsr.com/
Technical Support [e-mail]
Sales Contact [email protected]
© Copyright 2017 Laird. All Rights Reserved. Patent pending. Any information furnished by Laird and its agents is believed to be accurate and reliable. All
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