Ezurio WISMC01BI Manuale utente

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802.11b/g Wireless LAN – TCP/IP (BISM II Pin Compatible)

Part Number: WISMC01BI

1. General Description

EZURiO’s Wireless LAN Module is a fully integrated and qualified solution for adding 802.11

functionality to embedded products. Unlike other modules it implements a complete wireless system,

including antenna, 802.11b/g radio, wireless network drivers, TCP/IP stack, security (WEP, WPA2,

SSL), a web-server, UART, GPIOs, 10 bit ADCs, plus an interpreter with a wireless language and user

accessible flash storage for program scripts. It is ideal for integration within M2M applications. It can

also be used for remote monitoring with the addition of just a sensor and battery/power supply.

The optimised RF section provides an output of up to +17dBm using the integrated ceramic antenna.

Coupled with a receive sensitivity of -84dBm, a range of 100 metres is achievable. A separate u.fl

connector is fitted to the module which allows a second antenna to be connected to take advantage of

antenna diversity. For most applications the internal antenna is sufficient. It provides a largely

omnidirectional distribution and is highly resistant to detuning, allowing the module to be fitted in a

wide variety of situations with no degradation of the radio performance.

An integrated ARM processor runs all of the wireless drivers and protocol stack. It includes a web

server that can be used to interrogate the variety of interfaces within module. The processor runs

EZURiO’s high efficiency embedded interpreter, which gives the module its amazing power. Users can

write simple scripts for the interpreter, which supports the BASIC language, as well as an extensive

range of commands to control the wireless connection. Scripts can be auto-run at power up to turn

the module into a self-contained wireless application processor. A low cost development system is

available for fast product evaluation and development.

The module contains an industry standard RS-232 UART for connection to a host processor,

peripheral device or sensor. This is capable of baud rates up to 921,600 bps for high speed data

transfer. Nine General Purpose I/O lines and two 10 bit analogue input lines are also provided. These

can be configured using scripts to provide control or monitoring of simple devices such as switches or

LEDs without a requirement for any external processing. Both the GPIO and ADC lines can be

accessed either via the wired host UART connection, or remotely over the Wireless LAN connection.

For battery and low power operation, support is provided for IEEE powersave modes, which can

reduce the current consumption to less than 10mA. This makes the module ideal for battery powered

sensor applications.

The Wireless LAN module is supplied in a small pcb form factor (22.0mm x 34.0mm x 7.6mm), that

connects to a main pcb using a 40 way Hirose connector. It is pin compatible with the EZURiO

Bluetooth Intelligent Serial Module BISMII. The Wireless LAN module is Lead-free and is RoHS

compliant and supports an industrial temperature range of -40°C to +85°C.

1.1 Applications

•POS Equipment

•Medical Equipment

•Telematics

•Industrial Automation

•Automotive Applications

•Battery Powered Sensors

2. Features

Feature Implementation

Wireless LAN Transmission Complete stand alone device with on board flash

Drivers Embedded 802.11b/g

Protocol TCP/IP IPv4 and DHCP

Range 100 metres typical

Frequency 2.4 – 2.484 GHz

Channels

11 channels – USA

13 channels – Europe (excl France)

14 channels – Japan

4 channels – France

Max Transmit Power

+15 dBm @ antenna connector.

+17dBm from integrated antenna

+10 dBm limit for France and Hungary

Receive Sensitivity -84dBm @ 2Mbps

Interface UART Interface

Programmable Real-time scripting engine

Data Transfer rate Up to 2 Mbps (determined by UART)

Serial Interface RS-232 bi-directional for commands and data.

16550 compatible. DTR, DSR, DCD, RI, RTS, CTS

Serial parameters Default 115200,n,8,1.

Configurable from 9,600 bps. Default 921,600 bps

Security WEP encryption 64 and 128 bit options, WPA, WPA2, SSL

Network support Access Point

I/O 2 x 10bit ADC’s

9 GPIO

Current consumption Less than 250mA (this depends on the data rate – 250mA is at

115kbaud) during data transfer with a configurable low power mode

Temperature Range -40°C to +85°C (requires operation in powersave modes)

-30°C to +60°C (continuous operation)

Supply Voltage 3.3V – 5.0V

Interface Levels 3.0V Logic

Connection Option: 40 way BISM II pin compatible Hirose connector

Lead free Lead-free and RoHS compliant

Warranty 2 Years

The features described within this data sheet are those targeted for the first production

release of firmware. Note that not all of these features may be available within individual

releases of the Engineering Sample firmware. Check with the firmware release notes to

determine the supported functionality.

2.1 Block Diagram

The module will have 40 way Hirose connector which will have a compatible pin out to the

EZURiO Bluetooth Intelligent Serial Module, BISM II Hirose connector.

3. Mechanical

Figure 1 Wireless LAN Module Dimensional outline

1 RF antenna 2 Optional RF connector (Hirose U.FL-R-SMT)

3 Board to board connector (Hirose connector) 4 2MM maximum top side component height

(excluding antenna)

5 1.5MM maximum bottom side component

height

6 3.8 max. pcb clearance for fixings body (top

and bottom)

7 40 way connector 8 2.2 +/- 0.075 fixing holes X 3

3.1 40 way Hirose Pin Descriptions

The Hirose DF12C board-to-board connector on the module is a 40-pin double-row receptacle.

The table below defines the pin functions. Note that this pin-out is as viewed from the underside of the

Module.

No.

Signal Description Pin

No.

Signal Description

1 ADC 0 1.8v Max 2 GPIO1 I/O for Host.

3 ADC 1 1.8v Max 4 GPIO2 I/O for Host

5 WLAN_ACTIVE Output 6 UART_RI ‘Ring’ Input or Output

7 N/C 8 UART_DCD Input or Output

9 N/C 10 UART_DSR Input

11 GND 12 GPIO3/UART_DTR I/O for Host

13 RESET Reset I/P * 14 GPIO4 I/O for Host

15 GND 16 GPIO5 I/O for Host

17 N/C Not used 18 GND

19 UART_CTS Clear to Send I/P 20 IRQ0 Input

21 UART_TX Transmit Data O/P 22 WAKEUP Not used

23 UART_RTS Request to Send O/P 24 BT_PRIORITY Input

25 UART_RX Receive Data I/P 26 N/C Not used

27 VCC_3V 3.0V Monitor 28 VCC_5v Input

29 VCC_5V Input 30 GND

31 VCC_5V Input 32 N/C

33 GPIO6 I/O for Host 34 N/C

35 GPIO7 ** I/O for Host 36 GND

37 GPIO8 ** I/O for Host 38 GND

39 GPIO9 I/O for Host 40 BT_STATE

Notes:

* The reset circuitry within the module incorporates a brown-out detector. The reset line has a fixed

10kOhm pull down resistor to ground.

GPIO lines can be configured through software to be either inputs or outputs. At reset, all GPIO lines

are configured as inputs.

UART_RX, UART_TX, UART_CTS, UART_RTS, UART_RI, UART_DCD and UART_DSR are all 3.0v level

logic. For example, when RX and TX are idle they will be sitting at 3.0V. For handshaking pins CTS,

RTS, RI, DCD, DSR, 0v is treated as an assertion.

Pin 8 (UART_DCD) is active low. It is normally 3.0v. When a connection is live this pin is low. This

means that when this pin is converted to RS232 voltage levels it will have the correct voltage level for

assertion.

Pin 10 (UART_DSR) is an input, with active low logic. It should be connected to the DTR output of the

host.

Pin 27 (VCC_3V monitor) may only be used for monitoring purposes. It must not be used as a current

source.

ADC inputs (pins 1 and 3) are read using UW script functions.

3.2 Electrical Specifications

3.2.1 Absolute Maximum ratings

Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the Module

are listed below; exceeding these values will cause permanent damage.

Parameter Min Max Unit

Peak current of power supply 550 mA

Voltage at digital pins -0.3 3.3 V

Voltage at POWER pin 3.3 5 V

3.2.2 Recommended Operating Parameters

3.2.2.1 Power Supply

Signal Name Pin No I/O Voltage level Comments

Vcc 29 I 3.3V to 5.0V Ityp = 250mA

GND 11, 15, 18,

30, 36, 38

6 Ground terminals to be attached

in parallel

Signal Name Pin No I/O Voltage level Comments

VCC_3V0 27 O 3.0V typical For monitoring only. No current

source

3.2.2.2 RS-232 Interface

Signal Name Pin No I/O Signal level Comments

UART_TX 21 O VOLmax=0.2V

VOHmin=2.8V

UART_RX 25 I VILmax=0.8V

VIHmin=2.1V

VIHmax=3.3V

UART_CTS 19 I VILmax=0.8V

VIHmin=2.1V

VIHmax=3.3V

UART_RTS 23 O VOLmax=0.2V

VOHmin=2.8V

UART_DSR 10 I VILmax=0.8V

VIHmin=2.1V

VIHmax=3.3V

UART_DTR 12 O VOLmax=0.2V

VOHmin=2.8V

Shared with GPIO3

UART_RI 6 I or O O/P : VOLmax=0.2V

VOHmin=2.8V

I/P : VILmax=0.8V

VIHmin=2.1V

VIHmax=3.3V

Direction may be programmed.

UART_DCD 8 I or O O/P : VOLmax=0.2V

VOHmin=2.8V

I/P : VILmax=0.8V

VIHmin=2.1V

VIHmax=3.3V

Direction may be programmed.

3.2.2.3 General Purpose I/O and ADC

Signal Name Pin No I/O Signal level Comments

GPIO 1 - 9 2,4,12,

14,16,

33, 35,

37, 39

I or O O/P : VOLmax=0.2V

VOHmin=2.8V

I/P : VILmax=0.8V

VIHmin=2.1V

VIHmax=3.3V

AIO_0, AIO_1 1, 3 I Range 0 – 1.8V

4. DC Characteristics

4.1 RF Performance

4.1.1 Transmit Power (802.11g)

Conducted Transmit Power Typ: +13 dBm

Antenna Gain (Integrated

Antenna)

+2dBi typ.

Effective Transmit Power Typ:+15dBm

4.1.2 Transmit Power (802.11b)

Conducted Transmit Power Typ: +15 dBm

Antenna Gain (Integrated

Antenna)

+2dBi typ.

Effective Transmit Power Typ:+17dBm

4.1.3 Receive Sensitivity (802.11b)

Receive Sensitivity (11Mbps) Typ: -84dBm

Antenna Gain (Integrated

Antenna)

+2dBi typ

Effective Receive Sensitivity -86dBm

4.1.4 Receive Sensitivity (802.11g)

Receive Sensitivity (6Mbps) Typ: -82dBm

Antenna Gain (Integrated

Antenna)

+2dBi typ

Effective Receive Sensitivity -84dBm

Serial Module

UART Interface

UART_TX

UART_RX

UART_CTS

UART_RTS

UART_DSR

UART_DTR

UART_RI

UART_DCD

/RXD

/TXD

/RTS

/CTS

/DTR

/DSR

/RING

/DCD

RS232 Interface

5. Functional Description

The Wireless LAN module is a self-contained product and requires only power to implement full wireless

communication. The integrated, high performance antenna together with the RF and Baseband circuitry

provides the Wireless LAN connectivity and the UART interface provides a connection to the host

system. The module can also be used with a program script that interrogates the GPIO and ADC lines,

allowing it to operate as a stand-alone sensor interface.

The complexity and flexibility of configuration are made simple for the design engineer by the

integration of a extremely comprehensive scripting language, UWScript. UWScript provides a BASIC

style language enhanced with commands that simplify the wireless operation of the module.

To provide the widest scope for integration a range of different physical host interfaces are provided:

5.1 Interfaces

5.1.1 UART interface

UART_TX, UART_RX, UART_RTS and UART_CTS form a conventional asynchronous serial data port with

handshaking. The interface is designed to operate correctly when connected to other UART devices

such as the 16550A. The signalling levels are nominal 0V and 3.0V and are inverted with respect to the

signalling on an RS232 cable. The interface is programmable over a variety of bit rates; no, even or

odd parity; stop bit and hardware flow control. The default condition on power-up is pre-assigned in the

external Flash. Two-way hardware flow control is implemented by UART_RTS and UART_CTS.

UART_RTS is an output and is active low. UART_CTS is an input and is active low. These signals

operate according to normal industry convention.

The module communicates with the customer application using the following signals:

RS-232

Port /TXD @ application sends data to the module’s UART_RX signal line

Port /RXD @ application receives data from the module’s UART_TX signal line

Figure 6.1 : UART interfaces

Note that the serial module output is at 3.0V CMOS logic levels. Level conversion must be added to

interface with an RS-232 level compliant interface.

5.1.2 GPIO Port

Nine lines of programmable bi-directional input/outputs (I/O) are provided that can be accessed either

via the UART port using UWscript functions. These can be used as data inputs or to control external

equipment.

Each of the GPIO pins can be independently configured to be either an Input or Output. A selection of

ports can be accessed synchronously.

Application

5.1.3 ADC

The Wireless LAN module provides access to two 10-bit ADCs. These provide an input range of 0mV to

1.8V ADC reference voltage.

Suitable external scaling and over-voltage protection should be incorporated in your design. If read

through the UART the ADCs provide 5 samples per second.

6. Firmware Features

6.1 Command Set

The Wireless LAN module has an integrated high level language UWScript. UWScript provides both the

command set and an structured programming language for the module. This revolutionary software

interface is described in detail in the UWScript Core Language and the UWScript Wireless LAN specific

extension documents. Accompanying these are release notes specific to each module and firmware

release notes detailing the functions supported with each release.

6.2 TCP/IP

The module implements IPLITE - an Ultra Compact IPv4 solution. IPLITE has a very small footprint and

minimal impact on the module’s processing and is designed specifically for the embedded environment.

The stack fully supports raw IP, UDP and TCP BSD sockets as well as providing an underlying support

infrastructure for the implementation of IP Security and is designed for minimum footprint and

maximum performance.

6.3 DHCP

With the Dynamic Host Configuration Protocol - DHCP - the process of configuring devices on a network

gets automated. With very little administrator intervention it is easy to accommodate new devices to a

network. Another big advantage of DHCP is that it allows for easy connection of mobile devices. DHCP-

enabled modules can move from one place to another with no disturbances. The TCP/IP stack

automatically gets an IP address and configuration suitable for the network segment it is currently

attached to.

6.4 Power Saving

The module supports the Wireless LAN IEEE power saving function. When this power saving mode is

enabled, the wireless LAN chipset goes to sleep when it is not actively receiving from the access point.

The chipset wakes up on a regular basis to receive broadcast messages from the AP or to transmit or

receive unicast messages. By using this technique the average power consumption of the chipset is

reduced from around 250mA in active receive to <10mA (TBC) when IEEE power save is in use. The

EZURiO module offers IEEE power save operation in two different modes:

•Powersave mode 1: The wireless LAN chipset operates in IEEE powersave mode and the

module microcontroller remains fully awake and ready to receive commands and data from

the host. This mode of power saving reduces the average consumption of the module to

<35mA (TBC).

•Powersave mode 2: The wireless LAN module operates in IEEE powersave mode and the

module microcontroller is put into a very low power standby mode. The average current

consumption in this mode is reduced to <5mA (TBC). In power save mode 2, /DSR (TBD) is

used by the host to indicate that the module can enter the low power state. When /DSR

(TBD) is de-asserted, the module microcontroller enters low power standby. The

microcontroller will re-start when either a packet is received from the AP or the host

requests it by asserting /DSR (TBD).

•Powersave mode 5: The modules default mode of start up is in powersave mode5.

At start up the module automatically enters Power Save 5 mode. The average

current consumption in this mode is reduced to <25mA (TBC). In this mode the module

powers down the WLAN chipset, and awaits commands from the host or from a

script running on the module. While in powersave mode 5 the host or scripts

cannot send commands relating to wireless operation.

To gain access to all commands the module must first be changed from powersave

mode 5 to either powersave 1 or powersave 0 mode.

7. Application Information

7.1 External Antenna

A variety of manufacturers can supply external antennae suitable for use with the WISM module as a

diversity or prime antenna. Users should be aware that the choice of antenna will affect the

qualification of the module.

To ensure that the qualification is not affected, the TOTAL GAIN of the external antenna, including

insertion loss of the connectors and cable must be less than 3dBi. If a higher gain is employed, then

the pre-qualified status of the module will be lost. It is the customer’s responsibility to ensure that an

external antenna does not negate the qualification.

7.2 Power Supply Considerations

The power supply for the Module has to be a single voltage source of Vcc within the range of 3.3 V to

5.0 V. It must be able to provide sufficient current in a transmit burst. This can rise to 550mA.

The Module includes regulators to provide local 3.0V. This rail is accessible on connector J2 for

monitoring purposes only. Under no circumstances should this pin be used to source current.

Power (Vcc) can be provided via the board-to-board connector Pins 28, 29 and 31.

7.3 Power-On-Reset

The Module is provided with an active high reset pin (Hirose 40way DF12C connector pin 13). Upon the

application of power, the Power On Reset circuit built into the Module will ensure that the unit starts

correctly. There is no need for an external power reset monitor.

7.4 Operational Temperature

The Wireless LAN module is designed to meet an operational temperature of -40°C to +85°C in the

standard mode where it is running in IEEE power save mode.

If the module is run in a mode that results in more frequent receive and transmit activity the operating

temperature will need to be derated to ensure that overall module power dissipation limits are not

exceeded. When the ambient temperature rises above 60°C the module should only be operated in

powersave mode 1 or higher.

7.5 Mounting the Module onto the application platform

There are many ways to properly install the Module in the host device. An efficient approach is to

mount the PCB to a frame, plate, rack or chassis. Fasteners can be M1.8 or M2 screws plus suitable

washers, circuit board spacers, or customized screws, clamps, or brackets in 2.2mm diameter holes.

Note that care should be taken to ensure the head of the fixing does not interfere with the circuit.

Nylon fixings are recommended. In addition, the board-to-board connection can also be utilized to

achieve better support.

The antenna (Brown square component on top side of PCB) must not be influenced by any other PCBs,

components or by the housing of the host device. The proximity of the antenna to large metallic objects

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