WF111 DEVELOPMENT KIT
DATA SHEET
Friday, 14 September 2012
Version 1.1
Bluegiga Technologies Oy
Copyright © 2000-2012 Bluegiga Technologies
All rights reserved.
Bluegiga Technologies assumes no responsibility for any errors which may appear in this manual.
Furthermore, Bluegiga Technologies reserves the right to alter the hardware, software, and/or specifications
detailed here at any time without notice and does not make any commitment to update the information
contained here. Bluegiga’s products are not authorized for use as critical components in life support devices
or systems.
The WRAP, Bluegiga Access Server, Access Point and iWRAP are registered trademarks of Bluegiga
Technologies.
The Bluetooth trademark is owned by the Bluetooth SIG Inc., USA and is licensed to Bluegiga Technologies.
All other trademarks listed herein are owned by their respective owners.
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VERSION HISTORY
Version
Comment
1.0
First version
1.1
Minor updates
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TABLE OF CONTENTS
1 Product description ........................................................................................................................................5
2 Board Description ..........................................................................................................................................6
2.1 WF111 Wi-Fi Module ............................................................................................................................6
2.2 Configurable I/O Ports ..........................................................................................................................7
2.3 Debug SPI Interface .............................................................................................................................7
2.4 Bluetooth co-existence .........................................................................................................................7
2.5 SDIO/SDIO SPI/CSPI Host Connection ...............................................................................................8
2.6 Board Powering ....................................................................................................................................8
2.7 Jumper Header .....................................................................................................................................8
2.8 LEDs .....................................................................................................................................................8
2.9 Resistor Jumpers ..................................................................................................................................9
2.10 Current Measurement Point............................................................................................................... 10
3 Board Layout .............................................................................................................................................. 11
4 Contact Information .................................................................................................................................... 12
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1 Product description
DESCRIPTION
DKWF111 is intended for evaluating the WF111
Wi-Fi module and as a basis for product
development. The board can be inserted
directly into an SDIO card slot, or a pin header
or wires can be soldered to the board for
alternative connections into the test system or
application.
The WF111 is a fully integrated single 2.4GHz
band 802.11 b/g/n module, intended for portable
and battery powered applications, where Wi-Fi
connectivity is needed. WF111 integrates an
IEEE 802.11 b/g/n radio, antenna or U.FL
antenna connector and SDIO or CSPI host
interfaces.
The WF111 provides a low cost and simple Wi-
Fi solution for devices that run an operating
system and a TCP/IP stack on-board, but still
offers the benefits of a module – small form
factor, easy integration and certifications.
Bluegiga also provides WF111 drivers for the
Linux operating system.
The WF111 has hardware support for Wi-Fi
encryption protocols and for various co-
existence schemes which enables exceptional
performance during simultaneous use of IEEE
802.11 and Bluetooth with a single antenna.
KEY FEATURES:
SDIO host connection
Two switch mode converters
Current measurement voltage output
PHYSICAL OUTLOOK:
Figure 1: DKWF111
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2 Board Description
2.1 WF111 Wi-Fi Module
Figure 2: WF111 Wi-Fi module example schematic
DKWF111 contains a WF111-A module variant with an internal chip antenna.
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2.2 Configurable I/O Ports
A number of programmable bi-directional input/outputs (I/O) are provided on a number of pads on the board,
arranged for a surface mounted pin header that can be soldered on if needed. PIO[0:5] are powered from
VDD_PADS.
PIO lines can be configured through software to have either weak or strong pull-ups or pull-downs. All PIO
lines are configured as inputs with weak pull-downs at reset. Configuration is done through the settings file
(MIB) uploaded through the host connection at device configuration.
In addition to PIO, the lines can be can be configured as interrupt request lines, wake-up lines from sleep
modes, status led drivers with multiple internally generated modes, general I/O pins controlled by the host,
Bluetooth co-existence interface or as a 32.768 kHz sleep clock input.
2.3 Debug SPI Interface
A header is provided for the module debug bus for certification RF. Access to internal settings and test modes
is available using a CSR compatible SPI adapter and UniTest-software.
For more information, please contact Bluegiga’s technical support.
2.4 Bluetooth co-existence
Industry standard 2-wire and 3-wire, as well as Unity-3, Unity-4, Unity-3e co-existence schemes are supported
as well as the Unity+ -extension, and the associated signals are available. The PIO pads can be configured
for these functions among others. The co-existence parameters are set through the settings file uploaded
through the host connection.
A U.FL connector is also present for antenna sharing using the module internal RF switch.
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2.5 SDIO/SDIO SPI/CSPI Host Connection
The board is shaped to fit into a standard SDIO card slot, with the corresponding contact pads. The signals
are also present on a separate row of pads, where a standard surface mount pin header can be soldered if an
alternative connection is needed. Please note that after soldering this header the board will no longer fit into
an SDIO card slot.
The SDIO supply line is always connected to the module VDD_SDIO pad, as this supply pad provides the
voltage to which the bus voltage levels are referred, and should always be connected to the host system’s
logic supply. This voltage can range from 1.7V to 3.6V.
2.6 Board Powering
DKWF111 board can be powered through the SDIO host power line as mentioned in the previous section, or
through a two pin header with a standard 2.54mm raster. The pin header can be used with an external supply
voltage between 2.7V and 5.5V to the system. This voltage feeds a switch-mode converter that provides 3.3V
to the system (assuming the input is above 3.3V, below this it acts as a small resistance). The external power
supply should be specified for at least 500mA.
A second on-board switch-mode converter converts the 3.3V supply line from either supply input into a WiFi
core supply voltage of 1.5V.
2.7 Jumper Header
There is a four pin header on the board with two jumpers inserted.
The jumper connecting pins 1 and 2 connects module signal REGEN to the 1.5V supply line, enabling the
module. Removing the jumper will cause the module to fully power off.
The other jumper connecting pins 3 and 4 connects the module 3.3V supply line to the VDD_SDIO line. When
the SDIO host has 3.3V logic levels and can supply enough power for the evaluation board, this jumper is left
inserted. However, when the bus logic levels are at a voltage lower than 2.7V, the external power connector
on the board should be used to power the board. In this case the jumper should be removed to isolate the two
supply domains (thus preventing smoke).
2.8 LEDs
Two LEDs are present on the board: a green one, indicating when a 3.3V supply voltage is present, and a
blue one for indicating various operating modes. The blue led is connected to a PIO line, and its functions can
be set through the host connection.
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2.9 Resistor Jumpers
There are three places for 0 ohm resistors on board, with two populated. These can be used to change some
functionality of the board.
R6 connects the module 3.3V power supply to the VDD_PADS supply line, which acts as the logic level
reference for the PIO lines. If an external system running at a different voltage is required to be connected to
the PIO lines, R6 can be removed and the reference supply voltage fed to the PIO header supply pad.
R5 connects the module power amplifier supply to the switch mode regulator 3.3V output. If it is necessary to
connect the PA supply directly to the input (testing total consumption while powering directly from a lithium
battery, for example), the 0 ohm resistor can be moved from R5 to R7. The power amplifier is recommended
to be supplied with a voltage from 2.7V to 4.8V, with an absolute maximum of 5.5V (set by the switch mode
regulator input). Please note that this will remove the power amplifier from behind the current consumption
measurement circuit.
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2.10 Current Measurement Point
A two pin header is provided for measuring module momentary current consumption. Due to the dual voltage
requirement of the module, the measurement point only measures 3.3V consumption, including the
consumption and conversion losses of the switch mode converter providing the 1.5V core supply voltage. The
header gives the voltage dropped over a high-side series resistor, amplified suitably and referred to the 3.3V
voltage. The voltage relates to the current consumption with the following equation:
Imodule = (3.3V – Vout)/5
For example, a momentary reading of 2.6V would imply a current draw of 140mA.
An oscilloscope can be connected to this header to find the power consumption profiles of common use cases
in different use cases.
Detaching the jumper connecting the REGEN signal lowers the total consumption of the module and the
regulator to about 80µA. With the REGEN jumper removed the voltage across the measurement jumper can
be used to calibrate the current measurement reference.
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3 Board Layout
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4 Contact Information
Sales: sales@bluegiga.com
Technical support: support@bluegiga.com
http://techforum.bluegiga.com
Orders: orders@bluegiga.com
WWW: www.bluegiga.com
www.bluegiga.hk
Head Office / Finland:
Phone: +358-9-4355 060
Fax: +358-9-4355 0660
Sinikalliontie 5A
02630 ESPOO
FINLAND
Postal address / Finland:
P.O. BOX 120
02631 ESPOO
FINLAND
Sales Office / USA:
Phone: +1 770 291 2181
Fax: +1 770 291 2183
Bluegiga Technologies, Inc.
3235 Satellite Boulevard, Building 400, Suite 300
Duluth, GA, 30096, USA
Sales Office / Hong-Kong:
Phone: +852 3182 7321
Fax: +852 3972 5777
Bluegiga Technologies, Inc.
19/F Silver Fortune Plaza, 1 Wellington Street,
Central Hong Kong
