MXCHIP Information Technology EMW3280 Wi-Fi Module User Manual DS0001E EMW3280 V2

Data Sheet

EMW3280

Data Sheet

UART/Wi-Fi high speed data transceiver

Data Sheet

2.0

Date：2012-8-8

Data sheet

Overview

EMW3280 Wi-Fi modules developed by

MXCHIP integrate the TCP/IP protocol, IEEE

802.11b/g MAC and PHY. Wireless network

function can be deployed on user's products

easily. EMW3280 will save your development time

and greatly improve your product’s

competitiveness.

This product line is used to convert data

between UART and WLAN and support all of the

IEEE 802.11i security modes.

Applications

Building Automation / Access Control

Intelligent home appliances

Medical/Health Care

Industrial Automation Systems

Point Of Sale system (POS)

Auto electronics

Communicate with smart phones and

Products List

EMW

3

Generation

Function

Interface

-

Package

EMW

Embedded Wi-Fi

3

Module

2

3rd(2012)

8

Full function

0

UART

2

2.0mm lead pitch pins

4

2.0mm LGA

!

EMW Wi-Fi module hardware block

Network

Processor

120MHz CortexM

MCU

Flash

1Mbytes

SRAM

128KB

WLAN

Subsystem

128MHz Feroceon

CPU

802.11 a/b/g/n

MAC &

Baseband

2.4GHz

Transceiver

On-board PCB

antenna

U.F.L connector

8MHz OSC

1.8V regulator

PRODUCT BRIEF

GS1011

Ultra Low-Power Wireless Single Chip

PRODUCT OVERVIEW

GS1011 device is a highly integrated ultra low power wireless single chip which

contains an 802.11 radio, media access controller (MAC) and baseband processor,

on-chip flash memory and SRAM, and an applications processor all on a single

package. The GS1011 supports the full 802.11b (11Mbps) data rates providing

scalability on data throughput for higher bandwidth application while still providing

the ultra low power consumption for years of battery life. The GS1011 is pin and

package compatible with the GS1010 enabling seamless hardware upgrade fo

r

current designs. Along with its embedded software stack it offers a highly scalable,

reliable, manageable and secure wireless link to meet the growing demand o

f

wireless sensor networks utilizing the broadly accepted IEEE 802.11 standards

infrastructure. This solution is ideal for use in smart energy, building automation,

industrial and commercial automation and cold storage monitoring applications. In

addition, the solution provides capabilities such as location awareness which also

make it well suited for logistics and supply chain applications for tracking asset

location and status.

FEATURES & BENEFITS

 Highly Integrated wireless SOC with 802.11 radio, MAC and Baseband,

Integrated PA, Application CPU, RTC, SRAM and FLASH

 Reduces system cost of implementing separate devices and lowers design complexity

 Ultra small form-factor reduces board space

 Supports IEEE 802.11

 Lowers customer’s total cost of ownership (TCO) in network implementation and

management

 Seamlessly integrates with existing 802.11b/g infrastructure and utilizes the 802.11

security, manageability, easeof-use, and quality of service

 Supports full 802.11b data rates (up to 11 Mbps) for higher bandwidth applications

 802.11i/WPA2 Authentication, AES

Hardware encryption

 Enterprise level security &reliability for

sensor networks

 Power Management

 Optimized for battery powered application

with very low power consumption for

multiple years of battery life

 Location Awareness

 Enables users to trace and monitor assets

 Multiple I/O: SPI, UART, PWM, I2C,

ADC, GPIO

 Provides flexibility in system design for

easier integration

 Firmware, Device drivers, Reference

Application SW, APIs, and SDK

 Reduces customer development time for

application software enabling faster time to

market

 Seamless HW upgrade to current

designs

 Pin and package compatible with GS1010,

makes it drop in replacement onto current

GS1010 designs

GS1011 BLOCK DIAGRAM

Standby Power Domain

Network

Processor

WLAN

Subsystem

UART

Antenna

External Power Amp Control

(Optional)

RF Switch

44MHz XTAL

DC-DC Control

2x External Wake Up

32kHz XTAL

2x SPI

2x UART

2x ADC

I

2

C

3x PWM

32x GPIO ARM7 CPU

Battery (3.6V – 1.2V)

SPI

ADC

I

2

C

PWM

GPIO

ARM7 CPU

2.4 GHz

Transceiver

802.11

MAC &

Baseband

Flash

256KB

SRAM

128KB

RTC

2x Alarm

XTL

OSC

1.8 V Regulator

NVRAM

512 Bytes

PRODUCT BRIEF

GS1011

Ultra Low-Power Wireless Single Chip

PRODUCT OVERVIEW

GS1011 device is a highly integrated ultra low power wireless single chip which

contains an 802.11 radio, media access controller (MAC) and baseband processor,

on-chip flash memory and SRAM, and an applications processor all on a single

package. The GS1011 supports the full 802.11b (11Mbps) data rates providing

scalability on data throughput for higher bandwidth application while still providing

the ultra low power consumption for years of battery life. The GS1011 is pin and

package compatible with the GS1010 enabling seamless hardware upgrade fo

r

current designs. Along with its embedded software stack it offers a highly scalable,

reliable, manageable and secure wireless link to meet the growing demand o

f

wireless sensor networks utilizing the broadly accepted IEEE 802.11 standards

infrastructure. This solution is ideal for use in smart energy, building automation,

industrial and commercial automation and cold storage monitoring applications. In

addition, the solution provides capabilities such as location awareness which also

make it well suited for logistics and supply chain applications for tracking asset

location and status.

FEATURES & BENEFITS

 Highly Integrated wireless SOC with 802.11 radio, MAC and Baseband,

Integrated PA, Application CPU, RTC, SRAM and FLASH

 Reduces system cost of implementing separate devices and lowers design complexity

 Ultra small form-factor reduces board space

 Supports IEEE 802.11

 Lowers customer’s total cost of ownership (TCO) in network implementation and

management

 Seamlessly integrates with existing 802.11b/g infrastructure and utilizes the 802.11

security, manageability, easeof-use, and quality of service

 Supports full 802.11b data rates (up to 11 Mbps) for higher bandwidth applications

 802.11i/WPA2 Authentication, AES

Hardware encryption

 Enterprise level security &reliability for

sensor networks

 Power Management

 Optimized for battery powered application

with very low power consumption for

multiple years of battery life

 Location Awareness

 Enables users to trace and monitor assets

 Multiple I/O: SPI, UART, PWM, I2C,

ADC, GPIO

 Provides flexibility in system design for

easier integration

 Firmware, Device drivers, Reference

Application SW, APIs, and SDK

 Reduces customer development time for

application software enabling faster time to

market

 Seamless HW upgrade to current

designs

 Pin and package compatible with GS1010,

makes it drop in replacement onto current

GS1010 designs

GS1011 BLOCK DIAGRAM

Standby Power Domain

Network

Processor

WLAN

Subsystem

UART

Antenna

External Power Amp Control

(Optional)

RF Switch

44MHz XTAL

DC-DC Control

2x External Wake Up

32kHz XTAL

2x SPI

2x UART

2x ADC

I

2

C

3x PWM

32x GPIO ARM7 CPU

Battery (3.6V – 1.2V)

SPI

ADC

I

2

C

PWM

GPIO

ARM7 CPU

2.4 GHz

Transceiver

802.11

MAC &

Baseband

Flash

256KB

SRAM

128KB

RTC

2x Alarm

XTL

OSC

1.8 V Regulator

NVRAM

512 Bytes

3.3V Input

UART

SPI/I2S

ADC

DAC

Timer/PWM

I2C

GPIO

SDIO

Power

Mangement

MXCHIP CORPORATION

Wireless M2M Division

EMW3280 Wi-Fi module

Features

Fast, ease of use embedded system interface

UART baudrate is up to 921600

Max. data transmission speed: 90kbytes/s (UART)

Support UART hardware ﬂow control which ensure reliable data transmission

in high speed mode

Simpliﬁed hardware connections

Secure, stable Wi-Fi link

Support AP chient mode, soft AP mode and Ad-hoc mode

Secure, stable Wi-Fi link

Auto recover from Wi-Fi’s disconnection

Support WPA/WPA2 PSK, WEP encryption

IPEX antenna connector, on board PCB antenna

CE，FCC passed

Embedded TCP/IP stack

Support UDP protocol, broadcast and unicast

Support TCP protocol, act as TCP server or client

Allow 3 connections from TCP client under TCP server mode

Auto reconnect after TCP link is lost

Transfer data to internet through a gateway

Support DNS service

Flexible conﬁguration and management

Use EMSP commands to control and conﬁg module through UART

Send EMSP commands from Wi-Fi network

Conﬁguration on build-in html pages

Conﬁguration software is provided on multiple platforms

Designed for embedded systems

Less than 220mA in running mode

Less than 1mA in standby mode

Less than 30mA in low power mode, network connection is maintained

Time interval from reset to Wi-Fi connection is less than 2 seconds

Reliable quality, comprehensive technical services

Industrial temperature range: －40󺔯80℃

Module test appliance is provided

ROSH certiﬁcation passed

Evaluation boards, API library and test source codes are provided

EMW3280 Wi-Fi module

󲥣录
Function Description!1
1.Features!1
RF features!1
UART features !1
TCP/IP features !1
2.Electrical Parameters!2
2.1.Absolute maximum ratings: Voltage & Current!2
2.2.Operating conditions: Voltage & Current!2
2.3.Digital I/O port characteristics!3
Output voltage levels!3
Output voltage levels!3
NRST pin characteristics !3
2.4.Absolute maximum ratings: Temperature!3
2.5.Absolute maximum ratings: The Electromagnetic Environment Electrostatic discharge (ESD)!3
2.6.Static latch-up!4
2.7.RF characteristics !5
3.Mechanical Dimensions!9
3.1.Mechanical Dimensions Of EMW3280 (Metric units)!9
Module interface!10
1.Leds!10
2.Pinouts!10
3.Pin Arrangement!11
4.Typical Hardware Connection And Pin Description!11
Antenna!14
1.Minimizing radio interference!14
2.On-board Antenna Speciﬁcation!14
3.U.F.L RF Connector!15
Lable!16
Recommended Reﬂow Proﬁle!17
MSL/Storage Condition!17
Sales Information!18
    EMW3280 Wi-Fi module

8. Technical Support!18

EMW3280 Wi-Fi module

1. Function Description

EMW3280 Wi-Fi modules developed by MXCHIP integrate the TCP/IP protocol, IEEE

802.11b/g MAC and PHY. Wireless network function can be deployed on user's products easily.

EMW3280 will save your development time and greatly improve your product’s competitiveness.

EMW3280 modules can run in the industrial temperature rang: -40℃ to 85℃. The highest

baudrate of UART interface is 921600. It has two transfer modes: TCP, UDP, and support EMSP

commands to conﬁgure its parameters.

1.1. Features

★Single operation voltage: 3.3V.

★Power consumption: <220mA under run mode, current <1mA under standby mode.

★CPU frequency: 120MHz，ﬂash size: 1M bytes，RAM size128k bytes.

★Two working modes: command mode and data transmission mode.

★Complete Wi-Fi wireless communications solutions, to reduce the resource requirements of

the application processor;

★Multipul conﬁguration methods: build-in web pages，EMW tool box(PC software) and

EMSP commands；

RF features

★WLAN standard: IEEE 802.11b/g/n, Wi-Fi compatible.

★RF frequency: 2.4G ISM.

★Support AP chient mode, soft AP mode and Ad-hoc mode.

★WEP40 and WEP104 encryption (64/128bit), support open system or shared key.

★WPA/WPA2 PSK encryption, use AES or TKIP encryption algorithm.

★Auto recover from Wi-Fi disconnection.

★Time interval from reset to Wi-Fi connection is less than 2 seconds.

UART features

★UART Baudrate：1200－921600；

★Highest transmission speed: 90kbytes/s(send or receive), 60kbytes/s(send & receive both).

★upport UART hardware ﬂow control that provide the reliable data transmission

TCP/IP features

★Support DNS service.

★Support DHCP client and DHCP server.

★Support network data transmission protocol: TCP, UDP；

★TCP server or client.

★Reliable TCP link management: Automatic reconnect when the connection was lost.

★As a TCP server, allow 3 TCP connection from the clients.

★UDP broadcast or unicast.

! ! EMW3280 Wi-Fi module

1

1.2. Electrical Parameters

1.2.1. Absolute maximum ratings: Voltage & Current

Stresses above the absolute maximum ratings may cause permanent damage to the device.

These are stress ratings only and functional operation of the device at these conditions is not

implied. Exposure to maximum rating conditions for extended periods may aﬀect device

reliability.

Symbol

Ratings

Min

Max

Unit

VDD–VSS

Voltage

–0.3

4.0

V

VIN

Input voltage on ﬁve volt tolerant pin

VSS −0.3

5.5

V

VIN

Input voltage on any other pin

VSS −0.3

VDD+0.3

V

Symbol

Ratings

Max

Unit

IVDD

Total current into VDD power lines (source)

320

mA

IVSS

Total current out of VSS ground lines (sink)

320

mA

IIO

Output current sunk by any I/O and control pin

25

mA

IIO

Output current source by any I/Os and control pin

-25

mA

1.2.2. Operating conditions: Voltage & Current

Symbol

Note

Conditions

Speciﬁcation

Symbol

Note

Conditions

Min.

Typical

Max.

Unit

DD

IVDD

Current

VDD=3.3V, normal

2437 MHz，18 dBm，

11 Mbps CCK

TX Speed：80kbytes/s

219

224

230

mA

IVDD

Current

VDD=3.3V, normal

2437 MHz，18 dBm，

11 Mbps CCK

TX Speed：10kbytes/s

199

202

204

mA

IVDD

Current

VDD=3.3V, normal

2437 MHz，15 dBm，

54 Mbps OFDM

TX Speed：80kbytes/s

203

204

205

mA

IVDD

Current

VDD=3.3V, normal

2437 MHz，15 dBm，

54 Mbps OFDM

TX Speed：10kbytes/s

199

200

202

mA

IVDD

Current

VDD=3.3V，Receive mode

182

185

188

mA

IVDD

Current

VDD=3.3V，Sleep mode

50

60

uA

! ! EMW3280 Wi-Fi module

2

VVoltage 3.0 3.3 3.5 V

1.2.3. Digital I/O port characteristics

Output voltage levels

Symbol

Note

Parameter

Conditions

Min.

Max.

Unit

VOL

UART & IO

output voltage

Output low level voltage

IIO = +8 mA

2.7 V < VDD < 3.6 V

0.4

V

VOH

UART & IO

output voltage

Output high level voltage

IIO = +8 mA

2.7 V < VDD < 3.6 V

VDD-0.4

V

VOL

UART & IO

output voltage

Output low level voltage

IIO = +20 mA

2.7 V < VDD < 3.6 V

1.3

V

VOH

UART & IO

output voltage

Output high level voltage

IIO = +20 mA

2.7 V < VDD < 3.6 V

VDD-1.3

V

Output voltage levels

Symbol

Note

Parameter

Conditions

Min.

Max.

Unit

VIL

UART & IO

input voltage

Input low level voltage

TTL level

-0.5

0.8

V

VIH

UART & IO

input voltage

Input high level voltage

TTL level

2

VDD+0.5

V

VIH

UART & IO

input voltage

Input high level voltage

(5V input tolerant)

TTL level

2

5.5

V

VIL

UART & IO

input voltage

Input low level voltage

CMOS level

-0.5

0.35VDD

V

VIH

UART & IO

input voltage

Input high level voltage

CMOS level

0.65VDD

VDD+0.5

V

NRST pin characteristics

The NRST pin input driver uses CMOS technology. EMW3280 contains RC(resistance-

capacitance) reset circuit which ensures the module reset accurately when it powers up. If you

need to reset manually, just connect the external control signals to the reset pins directly.

Additional, you can also control the reset by means of the EMSP command.

Symbol

Item

Conditions

Min.

Typical

Max.

Unit

VIL(NRST)

/RESET input low level

–0.5

0.8

V

VIH(NRST)

/RESET input high level

2

VDD+0.5

V

RPU

Resistor for Pulling up

VIN = VSS

7.5

8

8.3

kΩ

CPD

Capacitor for charging and

Resetting

100

1000

pF

1.2.4. Absolute maximum ratings: Temperature

Symbol

Ratings

Max

Unit

TSTG

Storage temperature

–55 to +125

℃

TA

Working temperature

-40 to +85

℃

1.2.5. Absolute maximum ratings: The Electromagnetic Environment

Electrostatic discharge (ESD)

Symbol

Ratings

Conditions

Class

Max

Unit

VESD(HBM)

Electrostatic discharge voltage

(human body model)

TA = +25 °C

conforming to

JESD22-A114

2

2000

V

! ! EMW3280 Wi-Fi module

3

Symbol

Ratings

Conditions

Class

Max

Unit

VESD(CDM)

Electrostatic discharge voltage

(charge device model)

TA = +25 °C

conforming to

JESD22-C101

II

500

V

1.2.6. Static latch-up

These tests are compliant with EIA/JESD 78A IC latch-up standard.

Symbol

Parameter

Class

LU

Static latch-up class

TA = +105 °C conforming to JESD78A

II level A

! ! EMW3280 Wi-Fi module

4

1.2.7. RF characteristics

Basic characteristics

Item Speciﬁcation

Operating Frequency 2.412~2.472GHz

WiFi Standard 802.11b/g/n(1x1)＊

Modulation Type

11b: DBPSK, DQPSK,CCK for DSSS

11g: BPSK, QPSK, 16QAM, 64QAM for OFDM

11n: MCS0~7,OFDM＊

Data Rates

11b:1, 2, 5.5 and 11Mbps

11g:6, 9, 12, 18, 24, 36, 48 and 54 Mbps

11n: MCS0~7, up to 150Mbps

Antenna type One U.F.L connector for external antenna

PCB printed ANT (Reserve)

IEEE802.11b mode

Item Speciﬁcation

Modulation Type DSSS / CCK

Frequency range 2400MHz~2483.5MHz

Channel CH1 to CH13

Data rate 1, 2, 5.5, 11Mbps

TX Characteristics Min. Typical Max. Unit

Transmitter Output Power

11b Target Power 16 18 dBm

Spectrum Mask @ target power

fc +/-11MHz to +/-22MHz -30 dBr

fc > +/-22MHz -50 dBr

Frequency Error -25 -1 ＋25 ppm

Constellation Error( peak EVM)@ target power

1~11Mbps 35%

RX Characteristics Min. Typical Max. Unit

Minimum Input Level Sensitivity

1Mbps (FER≦8%) -97 -83 dBm

2Mbps (FER≦8%) -93 -80 dBm

5.5Mbps (FER≦8%) -91 -79 dBm

11Mbps (FER≦8%) -89 -76 dBm

Maximum Input Level (FER≦8%) -10 dBm

! ! EMW3280 Wi-Fi module

5

25

<

IEEE802.11g mode

Item Speciﬁcation

Modulation Type OFDM

Frequency range 2400MHz~2483.5MHz

Channel CH1 to CH13

Data rate 6, 9, 12, 18, 24, 36, 48, 54Mbps

TX Characteristics Min. Typical Max. Unit

Transmitter Output Power

11g Target Power 13 15 dBm

Spectrum Mask @ target power

fc +/-11MHz -20 dBr

fc +/-20MHz -28 dBr

fc > +/-30MHz -40 dBr

Frequency Error -25 -1.1 ＋25 ppm

Constellation Error( peak EVM)@ target power

6Mbps -5 dBm

9Mbps -8 dBm

12Mbps -10 dBm

18Mbps -13 dBm

24Mbps -16 dBm

36Mbps -19 dBm

48Mbps -22 dBm

54Mbps -30 -25 dBm

RX Characteristics Min. Typical Max. Unit

Minimum Input Level Sensitivity

6Mbps (FER≦10%) -90 -82 dBm

9Mbps (FER≦10%) -88 -87 dBm

12Mbps (FER≦10%) -86 -79 dBm

18Mbps (FER≦10%) -85 -77 dBm

24Mbps (FER≦10%) -82 -74 dBm

36Mbps (FER≦10%) -79 -70 dBm

48Mbps (FER≦10%) -75 -66 dBm

54Mbps (FER≦10%) -72 -65 dBm

Maximum Input Level (FER≦10%) -20 dBm

! ! EMW3280 Wi-Fi module

6

25

<

IEEE802.11n 20MHz bandwidth mode

Item Speciﬁcation

Modulation Type MIMO-OFDM

Channel CH1 to CH13

Data rate MCS0/1/2/3/4/5/6/7

TX Characteristics Min. Typical Max. Unit

Transmitter Output Power

11n HT20 Target Power 13 15 dBm

Spectrum Mask @ target power

fc +/-11MHz -20 dBr

fc +/-20MHz -28 dBr

fc > +/-30MHz -45 dBr

Frequency Error -25 -1.2 ＋25 ppm

Constellation Error( peak EVM)@ target power

MCS0 -5 dBm

MCS1 -10 dBm

MCS2 -13 dBm

MCS3 -16 dBm

MCS4 -19 dBm

MCS5 -22 dBm

MCS6 -25 dBm

MCS7 -32 -28 dBm

RX Characteristics Min. Typical Max. Unit

Minimum Input Level Sensitivity

MCS0 (FER≦10%) -89 -82 dBm

MCS1 (FER≦10%) -86 -79 dBm

MCS2 (FER≦10%) -84 -77 dBm

MCS3 (FER≦10%) -82 -74 dBm

MCS4 (FER≦10%) -78 -70 dBm

MCS5 (FER≦10%) -74 -66 dBm

MCS6 (FER≦10%) -72 -65 dBm

MCS7 (FER≦10%) -69 -64 dBm

Maximum Input Level (FER≦10%) -20 dBm

! ! EMW3280 Wi-Fi module

7

<25

IEEE802.11n 40MHz bandwidth mode

Item Speciﬁcation

Modulation Type MIMO-OFDM

Channel CH3 to CH11

Data rate MCS0/1/2/3/4/5/6/7

TX Characteristics Min. Typical Max. Unit

Transmitter Output Power

11n HT20 Target Power 12 14 dBm

Spectrum Mask @ target power

fc +/-22MHz -20 dBr

fc +/-40MHz -28 dBr

fc > +/-60MHz -45 dBr

Frequency Error -25 -1.3 ＋25 ppm

Constellation Error( peak EVM)@ target power

MCS0 -5 dBm

MCS1 -10 dBm

MCS2 -13 dBm

MCS3 -16 dBm

MCS4 -19 dBm

MCS5 -22 dBm

MCS6 -25 dBm

MCS7 -31 -28 dBm

RX Characteristics Min. Typical Max. Unit

Minimum Input Level Sensitivity

MCS0 (FER≦10%) -87 -79 dBm

MCS1 (FER≦10%) -84 -76 dBm

MCS2 (FER≦10%) -81 -74 dBm

MCS3 (FER≦10%) -79 -71 dBm

MCS4 (FER≦10%) -75 -67 dBm

MCS5 (FER≦10%) -71 -63 dBm

MCS6 (FER≦10%) -69 -62 dBm

MCS7 (FER≦10%) -66 -61 dBm

Maximum Input Level (FER≦10%) -20 dBm

! ! EMW3280 Wi-Fi module

8

25

<

1.3. Mechanical Dimensions

1.3.1. Mechanical Dimensions Of EMW3280 (Metric units)

!

Figure 1.1 EMW3280 top view

Figure 1.2 EMW3280 side view

Figure 1.3 EMW3280 bottom view

! ! EMW3280 Wi-Fi module

9

2. Module interface

2.1. Leds

D1

D2

Table 2.1 LED functions

Name

Color

Description

D1

Green

On: Initialize successful, working in normal

Oﬀ：Initialize failed, or standby mode

Flashing (Short/short/short): Firmware update mode

Flashing (Short/long/short): Illegal ﬁrmware version

D2

Red

Flashing: Data transmission (test failed in MFG mode)

On：Wi-Fi is connected

Oﬀ：Wi-Fi disconnected

2.2. Pinouts

EMW3280has two groups of pins (1X15 +1X15). The lead pitch is 2mm.

EMW3280’s pinout is shown in the Figure 2.1. Table 2.2 lists the pin functions.

Figure2.1 EMW3280: appearance and pinout

! ! EMW3280 Wi-Fi module

10

2.3. Pin Arrangement

Figure 2.2 EMW3280 pin arrangement

Pins

Pin Name

FT

Pins

Pin Name

FT

1-14

NC

22

UART_TXD(OUT)

15

GND

23

UART_RXD(IN)

√

16

nWI-FI LED(OUT)

BOOT(IN)

24

VDD

17

nRESET(IN)

25

GND

18

IO1

26-28

NC

19

NC

29

nWAKE_UP(IN）

20

nUART_RTS(OUT)

30

STATUS(IN)

√

21

nUART_CTS(IN)

√

2.4. Typical Hardware Connection And Pin Description

EMW3280 consume more power in data transmission. It is recommended that the VDD

power supply is connected in parallel with a 330uF/5V solid capacitor, or a high-frequency

electrolytic capacitor (low ESR), this can reduce the requirements of DC power supply, A 300mA

LDO can be used (500mA LDO is recommended).

Host Device

UART TX

UART RX

IO circult

WI-Fi Module

UART TX

IO circult

UART RX

TX

nCTS

UART_RXD

nUART_RTS

RX

nRTS

UART_TXD

nUART_CTS

IO2

IO1

IO3

STATUS

nRESET

WAKEUP

Optional

3.3V

Optional

nWIFI LED/BOOT

3.3V VDD

GND

1K

IO4 FC(IO1)

Optional

Figure 2.3 Typical hardware connection: TTL/CMOS UART Interface

! ! EMW3280 Wi-Fi module

11

Host Device

RS232 TX

RS232 RX

IO circult

WI-Fi Module

TX circult

IO circult

RX circult

TX

nCTS

UART_RXD

nUART_RTS

RX

nRTS

UART_TXD

nUART_CTS

IO2

IO1

IO3

STATUS

nRESET

WAKEUP

Optional

3.3V

Optional

nWIFI LED/BOOT

GND

1K

MAX3232

C1+

C1-

C2+

C2-

Vcc

V+

V-

1

3

4

5

3.3V

16

2

6

14 T1OUT T1IN 11

R1IN R1OUT

13 12

T2OUT T2IN

R2IN R2OUT

710

89

IO3 FC(IO1)

Optional

3.3V VDD

Figure 2.4 Typical hardware connection: RS232 UART Interface

MAX3485

3.3V

VCC

DI

RO

A

B

DE

RE

Host Device

RS485

IO circult

WI-Fi Module

RX circult

IO circult

TX circult

IO2

IO1

IO3

STATUS

nRESET

WAKEUP

Optional

3.3V

Optional

nWIFI LED/BOOT

GND

1K

HDC(IO1)

3.3V VDD

Figure 2.5 Typical hardware connection: RS485 UART Interface

! ! EMW3280 Wi-Fi module

12

Table 2.3 Pin functions

Type

Function

VDD

Power input.

GND

Grounding.

UART_RXD

I, FT

UART Data input.

UART_TXD

O

UART Data output.

nUART_CTS

I, FT

UART allow to send, active low.

nUART_RTS

O

UART is ready to receive, active low.

STATUS(IN)

I, FT,

PU

Set the operation mode, cooperation with BOOT pin:

WAKE_UP(IN)

I, PU

•Pull down: Enter standby mode

•Pull up: Wake up from standby mode

nRESET(IN)

I, PU

Pull down this pin for 1μs to reboot.

nWI-FI LED(OUT)

BOOT(IN)

O/I, PU

This pin has two functions:

nWIFI_LED：Output led D1 status, Low: D1 = on, High: D1 = oﬀ.

BOOT：Enter diﬀerent operation modes when powered on or reset.

IO1

NC

IO1 can be conﬁgured by software

IO1

I

Set to Frame Control mode (FC), used in DTU mode:

Input low, EMW3280 store the received UART data in RAM.

Input high, EMW3280 send the buﬀed UART data over Wi-Fi network.

Refer document: RM0001_EMW3280 for details

IO1

O

Set to Half-duplex Control mode (HDC), used in DTU mode:

Output low, while receiving UART data

Output high, while sending UART data

NC

Undeﬁned IOs. Leave them ﬂoating or grounding.

1. FT: = 5V input tolerant.

2. PU: The pin is at high level if no external signal is asserted.

3. PD: The pin is at low level if no external signal is asserted.

4. UART signals include: UART_TXD，UART_RXD，nUART_RTS和nUART_CTS.

5. Only VDD, GND UART_TXD and UART_RXD are needed in a simple connection.

6. We strong recommend that using STATUS signal to switch EMW3X80’s operation mode.

7. nRESET should not be forced pulled up by external circuit, otherwise standby mode and

internal watchdog would be unable to work properly. If an external signal is connected to

nRESET, this signal must be Open Drain Mode (OD).

8. Use BOOT pin and STATUS pin to deﬁne diﬀerent working mode.

BOOT

STATUS

EMW3280 operation mode

0

MFG mode

0

1 (Default)

FW UPDATE mode

1 (Default)

0

Command mode (working mode)

1 (Default)

DTU mode (working mode)

! ! EMW3280 Wi-Fi module

13

3. Antenna

There is co-layout design (C35&C32) for antenna connection. Normally, load the capacitor

c35(10pF/0201) , it means can use U.F.L RF connector for external antenna. If want to use on-

board PCB printed antenna, just need load the capacitor from C35 to C32.

In order to get the maximum performance, strongly suggest customer use external antenna

connected with U.F.L RF connector.





3.1. Minimizing radio interference

When integrating the WiFi module with on board PCB printed antenna, make sure

the area around the antenna end the module protrudes at least 15mm from the mother

board PCB and any metal enclosure. If this is not possible use the on board U.FL connector to

route to an external antenna.

The area (6.5mmx17.3mm) under the antenna end of the module should be keep clear of

metallic components, connectors, vias, traces and other materials that can interfere with the

radio signal.

3.2. On-board Antenna Speciﬁcation

Operating Frequency

2.412~2.472GHz

VSWR (max)

<=2.5:1

Peak Gain

~2.1dBi

Antenna Type

PCB printed PiFA antenna

! ! EMW3280 Wi-Fi module

14

3.3. U.F.L RF Connector

This module use U.F.L type RF connector for external antenna connection.

! ! EMW3280 Wi-Fi module

15

4. Lable

Label’s position is as follow：

FCC ID:XXXXXXXXXXXXXXXXX

XXXXXXXXXXXX

-EMW3280

-XXX

MO-VVSS

FCC ID:XXXXXXXXXXXXXXXXX

XXXXXXXXXXXX

-EMW3280

-XXX

MO-VVSS

A

B

C

D

E

F

A：CE logo

B：FCC ID

C：Two-dimensional code，XXXXXXXXXXXX－EMW3280－XXX，same mean as part E

D：Internal production mark

E：XXXXXXXXXXXX 12 digitals, EMW3280 MAC address

%EMW3280: Model

%XXX : Production date

F：MXCHIP logo

! ! EMW3280 Wi-Fi module

16

5. Recommended Reﬂow Proﬁle

Reﬂow times<= 2times (Max.)

6. MSL/Storage Condition

! ! EMW3280 Wi-Fi module

17

7. Sales Information

To buy this product, please call MXCHIP \during the working hours. (Monday~Friday A.M.

9:00~12:00; P.M. 1:00~6:00)

Telephone: +86-21-52655026 / 52655025

Address: Floor 2, Building No.9, Lane 271, Qianyang Street, Putuo District, Shanghai

Post Code: 200333

Email：

sales@mxchip.com

8. Technical Support

To get technical support or other information, please visit

http://www.mxchip.com

To get telephone technical support, please call us during the working hours:

MCUs

+86 (021)52655026-822 Email：support@mxchip.com

Embedded wireless devices

+86 (021)58655026-812 Email：support@mxchip.com

Development tools

+86 (021) 52655026-822 Emali：support@mxchip.com

! ! EMW3280 Wi-Fi module

18

This device complies with Part 15 of the FCC Rules. Operation is subject

to the following two conditions: (1) this device may not cause harmful

interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.

Changes or modifications not expressly approved by the party

responsible for compliance could void the user's authority to operate the

equipment.

This equipment has been tested and found to comply with the limits for

a Class B digital device, pursuant to part 15 of the FCC Rules. These

limits are designed to provide reasonable protection against harmful

interference in a residential installation. This equipment generates

uses and can radiate radio frequency energy and, if not installed and

used in accordance with the instructions, may cause harmful interference

to radio communications. However, there is no guarantee that interference

will not occur in a particular installation. If this equipment does cause

harmful interference to radio or television reception, which can be

determined by turning the equipment off and on, the user is encouraged

to try to correct the interference by one or more of the following

measures:

-Reorient or relocate the receiving antenna.

-Increase the separation between the equipment and receiver.

-Connect the equipment into an outlet on a circuit different from that

to which the receiver is connected.

-Consult the dealer or an experienced radio/TV technician for help.

To satisfy FCC RF exposure requirements, a separation distance of 20 cm or more

should be maintained between the antenna of this device and persons during device

operation.

To ensure compliance, operations at closer than this distance is not recommended.

Limited by local law regulations, version for North America does not have region selection option.

Information for the OEM Integrators

This device is intended for OEM integrators only. Please see the full grant of

equipment document for restrictions.

Label Information to the End User by the OEM or Integrators

If the FCC ID of this module is not visible when it is installed inside another device,

then the outside of the device into which the module is installed must be label with

"Contains FCC ID: P53-EMW3280".

MXCHIP Information Technology EMW3280 Wi-Fi Module User Manual DS0001E EMW3280 V2

Shanghai MXCHIP Information Technology Co.,Ltd. Wi-Fi Module DS0001E EMW3280 V2

P53-EMW3280_User Manual

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