Silex technology SX-550 User Manual

SX-550 WLAN Module

Developer’s Reference Guide



Part Number 40183-101

Revision D

© 2006 silex technology america, Inc.. All rights reserved.
January, 2006

silex technology america SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
OF THIS PRODUCT FOR A PARTICULAR PURPOSE. silex shall not be liable for any errors contained in this manual or for
any damages resulting from loss of use, data, profits, or any incidental or consequential damages arising from the use of
SILEX products or services. The information contained in this documentation is subject to change without notice.

Information and descriptions contained herein are the property of silex. Such information and descriptions may
not be copied, disseminated, or distributed without the express written consent of silex. This publication is subject
to change without notice.

The software embedded in this SX-550 module includes eCos, the Embedded Configurable Operating System.
eCos is licensed under a GNU GPL compatible Free Software License. In compliance with the eCos license, the
silex is offering the eCos source code for this product on our web site at http://www.silexamerica.com. A copy of
the eCos and GNU General Public License are available in the license folder on the CDROM that ships with this
product.

Trademarks

ExtendView is a trademark of silex technology america, Inc. All other company or product names referenced in
this document may be trademarks or registered trademarks of their respective owners.

silex technology america, Inc.

www.silexamerica.com

Part Number 40183-101

Contents

About This Reference Guide ..................................................................................................................................... 1

Safety Precautions................................................................................................................................................. 1

Emissions Disclaimer ............................................................................................................................................. 1

Chapter 1: Introduction .............................................................................................................................................. 3

Chapter 2: Getting Started......................................................................................................................................... 5

Verify Development Kit Contents ........................................................................................................................... 6

Installing the SX-550 WLAN Module...................................................................................................................... 7

Chapter 3: SX-550 Evaluation Daughtercard Hardware Configuration.................................................................... 9

Monitoring Module Status ...................................................................................................................................... 9

OEM Interface ...................................................................................................................................................... 10

Electrical Characteristics...................................................................................................................................... 12

Power Input ...................................................................................................................................................... 12

Power Management ......................................................................................................................................... 12

Serial Peripheral Interface................................................................................................................................ 12

Serial Ports....................................................................................................................................................... 13

General Purpose IO ......................................................................................................................................... 15

LEDs and General Purpose IO Signals............................................................................................................ 16

RS-232 Cable................................................................................................................................................... 17

Additional OEM Interface Signals .................................................................................................................... 17

OEM Interface Electrical Characteristics.......................................................................................................... 18

Chapter 4: Using the SX-550 WLAN Module .......................................................................................................... 19

Evaluation Module Connections .......................................................................................................................... 19

Using the Wireless Method .............................................................................................................................. 19

Using the Wired Ethernet Method .................................................................................................................... 20

Access silex Console Interface ............................................................................................................................ 20

Generating Configuration Data......................................................................................................................... 21

Chapter 5: Accessing Configuration Parameters .................................................................................................... 23

Access ExtendView Utility.................................................................................................................................... 23

Installing ExtendView Utility ............................................................................................................................. 24

Using ExtendView Utility .................................................................................................................................. 25

Access HTTP Pages............................................................................................................................................ 27

Access Internal Command Console..................................................................................................................... 28

Using Telnet Session ....................................................................................................................................... 29

Using Terminal Emulator through the Serial Port............................................................................................. 29

Using AT Modem Commands.............................................................................................................................. 30

Standard AT Commands Supported ................................................................................................................ 30

Response Codes ................................................................................................................................................. 32

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Chapter 6: Setting Configuration Parameters ........................................................................................................ 33

Factory Default Settings....................................................................................................................................... 33

Restoring Factory Default Settings .................................................................................................................. 34

Modify Basic Settings........................................................................................................................................... 34

Changing Serial Settings.................................................................................................................................. 34

Modifying TCP/IP Settings ............................................................................................................................... 36

Configure Simple Network Management Protocol............................................................................................... 39

Configuring GPIO Alerts and Traps ..................................................................................................................... 40

Configuring Serial Port Monitor Alert and Trap Configuration ............................................................................. 44

Chapter 7: Designing with the SX-550 .................................................................................................................... 46

OEM Header Interface ......................................................................................................................................... 46

Antenna Connectors ............................................................................................................................................ 48

Ethernet PHY ....................................................................................................................................................... 49

Transformer Specification ................................................................................................................................ 49

General Purpose I/O Interface ............................................................................................................................. 50

Power ................................................................................................................................................................... 51

Chapter 8: Product Specifications .......................................................................................................................... 52

TCP Port Connections ......................................................................................................................................... 55

Appendix A: Console Commands........................................................................................................................... 56

Wireless and Network Security Commands ........................................................................................................ 56

Port Commands ................................................................................................................................................... 62

Server Information Commands ............................................................................................................................ 63

Service Commands.............................................................................................................................................. 65

String Commands ................................................................................................................................................ 67

TCP/IP Commands .............................................................................................................................................. 68

Power Configuration Commands......................................................................................................................... 71

Firmware Update.................................................................................................................................................. 71

Miscellaneous Commands................................................................................................................................... 73

Help Commands .................................................................................................................................................. 73

Appendix B: Engineering Drawings ........................................................................................................................ 74

Antenna Cable Assembly..................................................................................................................................... 74

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Figures

Figure 1 Processor and Wireless LAN Radio PCB .................................................................................................. 3

Figure 2 Installing WLAN Module in Daughtercard .................................................................................................. 5

Figure 3 WLAN Module Inserted in Daughtercard ................................................................................................... 7

Figure 4 Antenna Connectors................................................................................................................................... 7

Figure 5 SX-550 Evaluation Daughtercard............................................................................................................... 8

Figure 6 JP1 Header............................................................................................................................................... 12

Figure 7 Optional Serial Signals .............................................................................................................................. 13

Figure 8 Serial Port DB-9 Connector...................................................................................................................... 14

Figure 9 RS-232 Cable Pinouts.............................................................................................................................. 17

Figure 10 ExtendView Main Page .......................................................................................................................... 25

Figure 11 ExtendView New View Window ............................................................................................................. 25

Figure 12 Create View with Default Settings.......................................................................................................... 26

Figure 13 ExtendView Window............................................................................................................................... 26

Figure 14 ExtendView Configuration Window ........................................................................................................ 27

Figure 15 SX-550 Home Page .............................................................................................................................. 28

Figure 16 Output Port Tab...................................................................................................................................... 34

Figure 17 Serial Settings Window .......................................................................................................................... 35

Figure 18 TCP/IP Window ...................................................................................................................................... 36

Figure 19 Change Password Window .................................................................................................................... 37

Figure 20 Advanced TCP/IP Configuration Window .............................................................................................. 38

Figure 21 SNMP Traps........................................................................................................................................... 40

Figure 22 Main and Auxiliary Antenna Connectors ................................................................................................ 48

Figure 23 Circuit Diagram with Transformer .......................................................................................................... 49

Figure 24 Antenna Cable Assembly....................................................................................................................... 74

Figure 25 Electrical Specifications for Antenna...................................................................................................... 75

Figure 26 Connector Specifications........................................................................................................................ 75

Tables

Table 1 Development Kit Contents........................................................................................................................... 6

Table 2 Status Monitors............................................................................................................................................. 9

Table 3 OEM Interface Pinout ................................................................................................................................ 10

Table 4 OEM Interface Signal Description .............................................................................................................. 11

Table 5 Logical Serial Port Signal Descriptions ..................................................................................................... 13

Table 6 DB-9 Pinouts for RS-232 Mode................................................................................................................. 14

Table 7 General Purpose IO Signal Descriptions................................................................................................... 15

Table 8 General Purpose I/O Signal Description ................................................................................................... 15

Table 9 LED and GPIO Descriptions...................................................................................................................... 16

Table 10 RS-232 Cable Pinout Description............................................................................................................ 17

Table 11 OEM Signal Parameter Descriptions....................................................................................................... 18

Table 12 Port Settings ............................................................................................................................................ 20

Table 13 Pushbutton Functions.............................................................................................................................. 21

Table 14 ExtendView System Requirements ......................................................................................................... 24

Table 15 Port Settings ............................................................................................................................................ 30

Table 16 AT Commands......................................................................................................................................... 31

Table 17 Extended AT Commands ........................................................................................................................ 32

Table 18 Response Codes ..................................................................................................................................... 32

Table 19 Factory Default Settings .......................................................................................................................... 33

Table 20 Serial Setting Parameters........................................................................................................................ 35

Table 21 TCP/IP Settings ....................................................................................................................................... 37

Table 22 TCP/IP Configuration Settings................................................................................................................. 38

Table 23 SNMP Commands................................................................................................................................... 39

Table 24 SNMP Trap Settings................................................................................................................................ 40

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Table 25 GPIO Commands .................................................................................................................................... 41

Table 26 GPIO Trigger Commands........................................................................................................................ 42

Table 27 GPIO Transmit Commands ..................................................................................................................... 43

Table 28 Port Monitor Alert Commands ................................................................................................................ 44

Table 29 TRIGMON Commands ............................................................................................................................ 45

Table 30 OEM Header Interface Pinout ................................................................................................................. 46

Table 31 OEM Interface Signal Description ............................................................................................................ 47

Table 32 Antenna Connector Types....................................................................................................................... 48

Table 33 10/100M Magnetic Specifications............................................................................................................. 49

Table 34 10/100M Magnetics Manufacturers ......................................................................................................... 50

Table 35 GPIO Interface......................................................................................................................................... 50

Table 36 Product Specifications ............................................................................................................................. 52

Table 37 Radio Performance Specifications .......................................................................................................... 52

Table 38 TCP Port Connections............................................................................................................................. 55

Table 39 Network Commands ................................................................................................................................ 56

Table 40 Port Commands....................................................................................................................................... 62

Table 41 Server Information Commands ............................................................................................................... 63

Table 42 Service Commands ................................................................................................................................. 65

Table 43 String Commands.................................................................................................................................... 67

Table 44 TCP/IP Commands.................................................................................................................................. 68

Table 45 Power Configuration ................................................................................................................................ 71

Table 46 Firmware Update ..................................................................................................................................... 71

Table 47 Miscellaneous Commands ...................................................................................................................... 73

Table 48 Electrical Performance ............................................................................................................................ 74

Table 49 Electrical Specifications........................................................................................................................... 76

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Part Number 40183-101

About This Reference Guide

This reference guide provides detailed specifications, diagrams and additional information required to integrate
the Ethernet and Wireless Serial Server Module in a product. The intended audiences are the developers and
engineers responsible for the integration of the module in another product.

Safety Precautions

 To prevent damage to the SX-550 module’s electronic circuit components, follow established ESD practices

and procedures for handling static-sensitive devices. All ESD-sensitive components must be stored and
shipped in ESD-conductive bags or bubble-wrap and labeled as such using the standardized ESD adhesive
warning label.

 Ethernet electrical wiring must be at least 6 feet from bare power wiring or lightning rods and associated

wires, and at least 6 inches from other types of wire (antenna wires, doorbell wires, wires from transformers
to neon signs), steam or hot water pipes, and heating devices.

 Protectors and grounding wire placed by the service provider must not be connected to, removed, or

modified by the customer.

Emissions Disclaimer

Final emission certification per FCC, CE and other agency requirements are the responsibility of the OEM using
any printed circuit assemblies or other items used in this developer’s kit in their saleable packaged product.

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Page 2 silex About This Reference Guide

Part Number 40183-101

Chapter 1: Introduction

The SX-550 WLAN Module provides a complete solution for integrating networking technology into a
product. It includes an embedded processor, auto-sensing 10baseT/100baseTX Ethernet MAC/PHY,
wireless chipset and embedded operating system with a full networking stack and drivers. The wireless
high speed network interface conforms to the IEEE 802.11a, b, g, and h protocols. The radio is based on
Conexant’s PRISM WorldRadio chipset.

The module consists of two printed circuit boards measuring 44.60 mm by 59.70 mm. One card contains
the processor and memory and the second card contains the 802.11abg wireless LAN radio, as shown in
Figure 1. In addition, the module supports dual diversity antennas and intelligent power control.

Figure 1 Processor and Wireless LAN Radio PCB

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Page 4 silex Introduction

Part Number 40183-101

Chapter 2:

Getting Started

You can install the SX-550 WLAN Module in the SX-550 Evaluation Daughtercard and connect the
cabling, as shown in Figure 2.

Figure 2 Installing WLAN Module in Daughtercard

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Verify Development Kit Contents

The SX-550 Evaluation Module Development Kit CAS-1000-I2C product consists of the components
listed in Table 1. Please ensure that all materials listed are present and free from visible damage or
defects before proceeding. If anything appears to be missing or damaged, please contact SILEX.

Table 1 Development Kit Contents

Description

SX-550 Evaluation Daughtercard

2x Antennas with 4-inch Cables

2 x Magnetic Stand with 3-foot Cables

5 VDC 1 Amp Power Supply

AC Power Cord for US

AC Power Cord for Europe

2 x Serial Null Modem Cables with Gender Changer

Plastic bag containing:

 4 x Rubber Feet with Adhesive

 3 M2 screws

 3 M2 nuts

 3  3mm nylon spacers

 3  8mm nylon spacers

CD containing:

 ExtendView Software

 Serial Port Emulator

 This User’s Guide

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Part Number 40183-101

Installing the SX-550 WLAN Module

To install the SX-550 WLAN module in the SX-550 Evaluation Daughtercard:

1. Using the 40-pin OEM header, plug the SX-550 WLAN Module in the SX-550 Evaluation
Daughtercard and secure with screws, nuts and spacers.

Figure 3 WLAN Module Inserted in Daughtercard

2. Plug the main antenna cable into the right top corner Main Antenna Connector on the card. If needed,
plug the auxiliary antenna cable into the Auxiliary Antenna Connector.

Figure 4 Antenna Connectors

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3. Connect the magnetic antenna base cable to the antenna cable.

4. Connect the antenna to the base.

5. Connect one serial null-modem cable from the Serial Port 2 DB-9 connector on the evaluation
daughtercard to a serial port on a personal computer or laptop. The PC or laptop acts as a console
port for command line configuration and monitoring.

6. If an Ethernet LAN connection is required, plug a category 5 Ethernet cable into the RJ-45 jack.
The Ethernet interface has Auto-MDIX that automatically detects and configures itself for either a

straight-thru or crossover Ethernet cable.

Figure 5 SX-550 Evaluation Daughtercard

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Part Number 40183-101

Monitoring Module Status

Chapter 3:

SX-550 Evaluation Daughtercard

Hardware Configuration

You can monitor the module status using the yellow, green and orange LED status indicators on the
monitor. Table 2 defines the default functions of the LED status indicators.

Table 2 Status Monitors

Function State Status

Power

Orange

Network Status

Yellow or Green

On The module is receiving power

Off The module is not receiving power

Blinking The module power supply is malfunctioning

Yellow Off

No network activity

Green Off

Yellow On

10baseT network active

Green Off

Yellow Blinking

10baseT network data received

Green Off

Yellow Off

100baseTX network active

Green On

Yellow Off

100baseTX network data received

Green Blinking

Yellow On

Green On

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Wireless network active, if wireless model

Part Number 40183-101

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Function State Status

Yellow Blinking

Wireless network data received, if wireless model

Green Blinking

OEM Interface

Table 3 describes the OEM interface pinout, J5, for the SX-550 Evaluation Daughtercard. Table 4
describes the OEM interface signal descriptions.

All input and output signals, except the differential signals, are 0 to 3.3 V logic signals.

Table 3 OEM Interface Pinout

Pin Signal Pin Signal

1 TPRX+ 2 TPTX+

3 TPRX- 4 TPTX-

5 GPIO_7 6 GPIO_8

7 AVDD 8 +3.3VDD

9 UART0_RXD 10 GPIO_9

11 UART0_TXD 12 GPIO_10

13 GND 14 +3.3VDC

15 UART0_RTS 16 UART0_CTS

17 UART1_RTS 18 UART1_CTS

19 GND 20 GND

21 UART1_TXD 22 UART1_RXD

23 GND 24 RESET_N

25 SPI_CS 26 SPI_CLK

27 +3.3VDC 28 GND

29 GPIO_1 30 SPI_SDO

31 GPIO_2 32 SPI_SDI

33 +3.3VDC 34 GND

35 GPIO_3 36 GPIO_4

37 GND 38 GND

39 GPIO_5 40 GPIO_6

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Hardware Configuration

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Table 4 OEM Interface Signal Description

Signal Pin Type Description

TPRX+, TPRX- 1,3 Differential

Ethernet Transmit Data primary

output

TPTX+, TPTX- 2,4 Differential

Ethernet Receive Data primary

input

AVDD 7 Power Ethernet Power Output to transformer

center tap

UART0_RXD 9 Input Serial Port 1 Receive Data

UART0_TXD 10 Output Serial Port 1 Transmit Data

UART0_RTS 15 Output Serial Port 1 Request To Send

UART0_CTS 16 Input Serial Port 1 Clear to Send

UART1_RXD 22 Input Serial Port 2 Receive Data

UART1_TXD 21 Output Serial Port 2 Transmit Data

UART1_RTS 17 Output Serial Port 2 Request To Send

UART1_CTS 18 Input Serial Port 2 Clear to Send

GPIO1, GPIO2,
GPIO3, GPIO4,
GPIO5, GPIO6,

29, 31, 35, 36,
39, 40, 5, 6,
10, 12

Input/Output General Purpose Input/Output Signals 1-

10, User defined

GPIO7, GPIO8,
GPIO9, GPIO10

SPI_CS 25 Output Serial Peripheral Interface Chip Select

(high-true)

SPI_SDO 30 Output Serial Peripheral Interface Data Out

SPI_SDI 32 Input Serial Peripheral Interface Data In

SPI_CLK 26 Output Serial Peripheral Interface Clock

RESET_N 24 Output Power-on Reset (low true)

+3.3VDC 8, 14, 27, 33 Power Power VCC Input

GND 13, 19, 20, 23,

Power Power Ground

28, 34, 37, 38

SX-550 Evaluation Daughtercard
Hardware Configuration

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Electrical Characteristics

The power requirements, port pinouts, GPIO characteristics, cable connections and wireless operational
modes are described below.

Power Input

Power to the SX-550 WLAN Module and Evaluation Daughtercard is supplied through the power jack,
located at J4, at +5VDC ±10%. Use a +5VDC power supply with a minimum of 1 amp capacity.

Power of +3.3VDC ±5% is input to the SX-550 WLAN Module via the OEM header, J5.

Power Management

Power for the SX-550 WLAN Module is less than 3 watts in normal power mode and peak consumption is
less that 3.3 watts. In low power mode average power is 1.2 watts.

Serial Peripheral Interface

The four SPI signals are accessible using the 20-pin header JP7. The Data Out, Data In and Clock
signals are routed to both the JP7 header and an on-board temperature sensor. The SPI Chip Select
signal is selectable to either the JP7 header or to the temperature sensor using the 3-pin header JP1.

3

1

JP7

J5

U1

Figure 6 JP1 Header

Routing the SPI Chip Select Signal

To select the on-board temperature sensor, place the jumper on pins 1 and 2.

To route the Chip Select signal to JP7, place the jumper on pins 2 and 3.

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Hardware Configuration

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Serial Ports

The two serial ports can be accessed with RS-232 signals, via the DB-9 connectors, or logic signals, via
the 10-pin headers.

The two logical serial port headers are located at JP2 and JP6. The serial ports provide four dedicated
signals and three optional signals. The optional signals are configured using jumpers. Table 5 details the
serial port signal descriptions.

Table 5 Logical Serial Port Signal Descriptions

Pin Signal Input/Output Pin Signal Input/Output

1 DCD Input

Enabled via header

2 DSR Input

Enabled via header

3 RXD Input 4 RTS Output

5 TXD Output 6 CTS Input

7 DTR Output

Enabled via header

8 No

Connect

9 GND 10 3.3V

All signals are 0 to 3.3 V logic signals.

To use header JP2, disable the RS-232 transceiver, U3, by placing a jumper on both JP8 pins.

To use header JP6, disable the RS-232 transceiver, U6, by placing a jumper on both JP9 pins.

Using the Optional Serial Signals

Signals GPIO 1 to 6 can be used as GPIO or Serial Port control signals DTR, DSR and DCD.

To configure signals DTR, DSR and DCD, place a jumper between JP4 and JP5 for that signal, as shown
in Figure 7.

SX-550 Evaluation Daughtercard
Hardware Configuration

GPIO1

GPIO2

GPIO3

GPIO4

GPIO5

GPIO6

JP3

JP4

JP5

DSR1

DTR1

DCD1

DTR2

DCD2

DSR2

Figure 7 Optional Serial Signals

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To select the GPIO signals, place the jumper between JP3 and JP4. The GPIO signals are available at
JP7

Standard serial RS-232 signals are available on the DB-9 connectors J2 and J3 for serial ports 1 and 2,
as shown in Figure 8.

Figure 8 Serial Port DB-9 Connector

Table 6 DB-9 Pinouts for RS-232 Mode

DB-9 RS-232 Signal Type

1 DCD Input

Enabled via header

2 RXD Input

3 TXD Output

4 DTR Output

Enabled via header

5 Ground

6 DSR Input

Enabled via header

7 RTS Output

8 CTS Input

9 NC

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Hardware Configuration

Part Number 40183-101

General Purpose IO

The GPIOs, located on JP7, can be used for controlling or monitoring OEM functions. External pull-ups
are recommended for customization.

N

OTE: GPIO 7 is fixed as a switch input and GPIO 8 is fixed as an LED output.

Table 7 General Purpose IO Signal Descriptions

Pin Signal Selectable Pin Signal Selectable

1 GPIO_1 Via JP3 2 GPIO_2 Via JP3

3 3.3V 4 GPIO_3 Via JP3

5 GPIO_4 Via JP3 6 GND

7 GPIO_5 Via JP3 8 GPIO_6 Via JP3

9 GPIO_7 10 3.3V

11 GPIO_8 12 GPIO_9

13 GPIO_10 14 GND

15

17

19







16 3.3V

18

20





To use the first 6 GPIOs, place a jumper between JP3 and JP4 for the specific GPIO.

Table 8 General Purpose I/O Signal Description

Evaluation

Daughtercard

CN210

GPIO

I/O Drive High/Low Description

GPIO

1 2 I/O 6/6 mA Set as input or output

2 3 I/O 6/6 mA Set as input or output

3 4 I/O 6/6 mA Set as input or output

4 5 I/O 6/6 mA Set as input or output

5 6 I/O 6/6 mA Set as input or output

6 7 I/O 6/6 mA Set as input or output

7 48 I or I/O 6/6 mA Switch input

8 49 O or I/O 6/6 mA LED_1

SX-550 Evaluation Daughtercard
Hardware Configuration

1 = off
0 = switch depressed

1= off
0 = illuminated

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Part Number 40183-101

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Evaluation

Daughtercard

CN210

I/O Drive High/Low Description

GPIO

GPIO

9 50 O or I/O 6/6 mA LED_2 or used as a GPIO

1= off
0 = illuminated

10 51 O or I/O 6/6 mA LED_3 or used as a GPIO

1= off
0 = illuminated

43 O 6/6 mA SPI chip select

44 O 6/6 mA Ethernet PHY

1 = power down

0 = off (default)

47 O 6/6 mA Ethernet PHY

1 = not reset (default)

0 = reset#

52 I 6/6 mA PCI_LED2YP input

53 I 6/6 mA PCI Power Management Event#

input

54 O 6/6 mA PCI Clock

1 = clock off
0 = run# (default)

LEDs and General Purpose IO Signals

The LEDs are connected to the 10 GPIOs for easy viewing of signal activity. The first 7 GPIOs drive the
first 7 LEDs, D4 to D10. The last 3 GPIOs 8 to 10 drive LEDs D1 to D3. Logic 0 and 0 volts on GPIO_x
illuminates the LED.

Table 9 LED and GPIO Descriptions

GPIO LED

GPIO_1 D4

GPIO_2 D5

GPIO_3 D6

GPIO_4 D7

GPIO_5 D8

GPIO_6 D9

GPIO_7 D10

GPIO_8 D1 orange

GPIO_9 D2 yellow

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Hardware Configuration

Part Number 40183-101

GPIO LED

GPIO_10 D3 green

RS-232 Cable

The supplied DB-9 female-to-female null modem cable is wired as shown below.

Figure 9 RS-232 Cable Pinouts

Table 10 RS-232 Cable Pinout Description

Pin Description

1 DCD (Data Carrier Detect) Input

6 DSR (Data Set Ready) Input

2 RxD (Receive Data) Input

3 TxD (Transmit Data) Output

4 DTR (Data Terminal Ready) Output

7 RTS (Request To Send) Output

8 CTS (Clear To Send) Input

5 Ground

Additional OEM Interface Signals

The output LED signals ORLED-, GRLED- and YELED- represent the state of the LEDs on the module.
Logic 0 indicates the LED is on, and Logic 1 indicates the LED is off. Buffers are recommended if LEDs
are to be driven on the end-user side.

The SWITCH signal is connected to a momentary pushbutton switch on the evaluation daughtercard and
is in the normally open position. Depressing the switch causes a short to ground. A 4.7 K-ohm pull-up
resistor to +3.3 VDC is connected. The module’s processor monitors this signal. The end-user can drive
or use open-collector to this signal to either logic level or can monitor this signal as an input.

SX-550 Evaluation Daughtercard
Hardware Configuration

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OEM Interface Electrical Characteristics

Table 11 OEM Signal Parameter Descriptions

Parameter Symbol Condition Minimum Maximum Unit

Input high voltage Vih 2.0▼ Volts

Input low voltage Vil 0.7 Volts

Output high voltage

Voh Ioh = 4mA 2.4 Volts

UART0_TXD, UART0_RTS,

UART1_TXD, UART1_RTS

Output low voltage

Vol Iol = 4mA 0.4 Volts

UART0_TXD, UART0_RTS,

UART1_TXD, UART1_RTS

Output high voltage

Voh Ioh = 6mA 2.4 Volts

GPIO 1 to 10, SPI, CS, SPI_SDO,
SPI_CLK, Reset_N

Output low voltage

Vol Iol = 6mA 0.4 Volts

GPIO 1 to 10, SPI, CS, SPI_SDO,
SPI_CLK, Reset_N

Input Leakage Current Ii 0 < Vin < 3.3v -10 +10

µA

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Hardware Configuration

Part Number 40183-101

Chapter 4:

Using the SX-550 WLAN Module

The SX-550 WLAN module provides a dedicated host processor and an industry-leading network protocol
stack for connectivity to a traditional wired Ethernet or an 802.11a, b or g wireless local area network.

The module is easy to configure with several management options, including an internal web browser
interface and the Windows-based ExtendView configuration utility. In addition, the module’s internal
console can be accessed using TELNET or the serial port via a command line interface for sophisticated
diagnostics and configuration. It is also compatible with the SNMP MIBs I, II and has a proprietary MIB to
allow complete customization and monitoring.

The two circuit boards are 1.8 x 2.4-inch six-layer integrated design using surface-mounted components.
The module contains two I/O ports and three status LEDs that can be configured and programmed to
meet your functional requirements.

The compact form factor offers three through-holes allowing for flexible mounting options for
configurations, such as Ethernet and wireless versions. The Serial Port Emulator software allows for an
easy integration with existing PC applications.

A variety of power management options ensure very low power consumption during inactive periods.

Evaluation Module Connections

You can connect the SX-550 Evaluation Daughtercard to your LAN using wireless or wired Ethernet.

Using the Wireless Method

To use wireless method:

1. Verify the Ethernet cable is disconnected from the RJ-45 jack.

2. Connect the power supply plug to the SX-550 Evaluation Daughtercard.

3. Power on the power supply.
When the wireless connection connects with the access point, the yellow and green LEDs on the

module light up simultaneously. The lights blink during activity.

4. Continue to the Access silex Console Interface section.

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