GainSpan GS2011M User manual

Release 0.9, 03/18/2014
Copyright © 2014 GainSpan. All rights reserved.
Preliminary
Confidential
GS2011M Low Power WiFi Module
Data Sheet
GS2011M-DS-001211
GainSpan®
802.11b/g/n Ultra-Low Power WiFi® Series Modules

FCC Communications
Commission (FCC)
Interference Statement
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 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 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
FCC Caution: To assure continued compliance, (example - use only shielded interface
cables when connecting to computer or peripheral devices). Any changes or modifications
not expressly approved by the party responsible for compliance could void the user’s
authority to operate this equipment.
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.
FCC & IC Radiation
Exposure Statement
This equipment complies with FCC & IC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance 20cm
between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or
transmitter must not be co-located or operating in conjunction with any other antenna or
transmitter. This device intended only for OEM integrators under the following conditions:
1. The antenna must be installed such that 20cm is maintained between the antenna and
users, and
2. The transmitter module may not be co-located with any other transmitter or antenna. As
long as 2 conditions above are met, further transmitter test will not be required.
However, the OEM integrator is still responsible for testing their end-product for any
additional compliance requirements required with this module installed (for example,
digital device emissions, PC peripheral requirements, etc.).
3. digital device emissions, PC peripheral requirements, etc.).
4. digital device emissions, PC peripheral requirements, etc.).
IMPORTANT NOTE: In the event that these conditions cannot be met (for example certain
laptop configurations or co-location with another transmitter), then the FCC & IC
authorizations are no longer considered valid and the FCC & IC IDs cannot be used on the
final product. In these circumstances, the OEM integrator will be responsible for re-evaluating
the end product (including the transmitter) and obtaining separate FCC & IC authorizations.
End Product Labeling: This transmitter module is authorized only for use in device where
the antenna may be installed such that 20cm may be maintained between the antenna and
users (for example access points, routers, wireless ADSL modems, and similar equipment).
the final product must be labeled in a visible area with the corresponding FCC ID number.

IC Certification - Canada The labeling requirements for Industry Canada are similar to those of the FCC. A visible label
on the outside of the final product must display the IC labeling. The user is responsible for
the end product to comply with IC ICES-003 (Unintentional radiators).
English
This device complies with Industry Canada license-exempt RSS standard(s). Operation is
subject to the following two conditions:
1. This device may not cause harmful interference
2. This device must accept any interference received, including received, including
interference that may cause undesired operation of the device.
French
Cet appareil est conforme à Industrie Canada une licence standard RSS exonérés (s). Son
fonctionnement est soumis aux deux conditions suivantes:
1. Cet appareil ne doit pas provoquer d'interférences
2. Cet appareil doit accepter toute interférence reçue, y compris les interférences pouvant
provoquer un fonctionnement indésirable de l'appareil.
Manual Information That Must be Included
The user’s manual for end users must include the following information in a prominent
location.
IMPORTANT NOTE: To comply with FCC & IC RF exposure compliance requirements, the
antenna used for this transmitter must be installed to provide a separation distance of at least
20cm from all persons and must not be co-located or operating in conjunction with any other
antenna or transmitter.
Other Notes: GainSpan modules have been built or under development for near body
exposure applications. The 20cm statement is a standard note because absorption rate
testing (commonly knowns as SAR or Specific absorption rate) is not modularly transferable
for FCC/IC. Thus, if a radio is being used against the body, the end user is still responsible
to test for regulatory near body exposure testing (for USA, please refer to the following):
• FCC Part 1.1037
• FCC Part 2.1091 Mobile Devices
• FCC Part 2.1093 Portable Devices
• FCC Part 15.247 (b) (4)

Copyright Statement This GainSpan manual is owned by GainSpan or its licensors and protected by U.S. and
international copyright laws, conventions, and treaties. Your right to use this manual is
subject to limitations and restrictions imposed by applicable licenses and copyright laws.
Unauthorized reproduction, modification, distribution, display or other use of this manual may
result in criminal and civil penalties.
GainSpan assumes no liability whatsoever, and disclaims any express or implied warranty,
relating to sale and/or use of GainSpan products including liability or warranties relating to
fitness for a particular purpose, merchantability, or infringement of any patent, copyright or
other intellectual property right. GainSpan products are not authorized for use as critical
components in medical, lifesaving, or life-sustaining applications
GainSpan may make changes to specifications and product descriptions at any time, without
notice.
Trademark GainSpan is a registered trademark of GainSpan Corporation. All rights reserved. Other
names and brands may be claimed as the property of others.
Contact Information In an effort to improve the quality of this document, please notify GainSpan Technical
Assistance at 1.408.627.6500 in North America or [phone] outside North America.
Web and Email Contact www.gainspan.com
[email protected]

GS2011M-DS-001211, Release 0.9 Confidential Preliminary 5
Table of Contents
Chapter 1 About This Manual ............................................................................................... 7
Revision History ..............................................................................................................7
Audience ......................................................................................................................... 8
Standards ........................................................................................................................ 8
Documentation Conventions ........................................................................................... 8
Documentation .............................................................................................................. 11
Documentation Feedback ....................................................................................... 12
Contacting GainSpan Technical Support ...................................................................... 12
Returning Products to GainSpan .................................................................................. 13
Guidelines for Packing Components for Shipment .................................................. 13
Accessing the GainSpan Portal .................................................................................... 14
Ordering Information ..................................................................................................... 14
Chapter 2 GS2011M Overview .......................................................................................... 15
Product Overview .......................................................................................................... 15
GS2011M Module Product Features ............................................................................. 15
Chapter 3 GS2011M Architecture ...................................................................................... 19
Architecture Description ................................................................................................ 19
Wireless LAN and System Control Subsystem ............................................................. 21
Onboard Antenna / RF Port / Radio ........................................................................ 21
802.11 MAC ....................................................................................................... 21
802.11 PHY ........................................................................................................ 22
RF/Analog .......................................................................................................... 23
Network Services Subsystem .................................................................................. 23
APP CPU ............................................................................................................ 23
Crypto Engine ..................................................................................................... 23
Memory Subsystem ................................................................................................. 23
SRAM ................................................................................................................. 23
ROM ................................................................................................................... 24
OTP ROM ........................................................................................................... 24
Flash Interface .................................................................................................... 24
Clocks ...................................................................................................................... 24
Real Time Clock (RTC) Overview ........................................................................... 25
RTC Main Features ............................................................................................ 25
Real Time Clock Counter ................................................................................... 26
RTC I/O .............................................................................................................. 27
DC_DC_CNTL .................................................................................................... 27
GS2011M Peripherals ............................................................................................. 27
SDIO Interface .................................................................................................... 27
SPI Interface ....................................................................................................... 28
UART Interface ................................................................................................... 28
I2C Interface ....................................................................................................... 28
GPIO .................................................................................................................. 29
ADC .................................................................................................................... 29

GS2011M Low Power WiFi Module Data Sheet
6 Confidential Preliminary GS2011M-DS-001211, Release 0.9
PWM ................................................................................................................... 29
System States ......................................................................................................... 30
Power Supply .......................................................................................................... 33
Chapter 4 Pin-out and Signal Description .......................................................................... 37
GS2011Mxx Device Pin-out .......................................................................................... 37
GS2011Mxx Module Pins Description ..................................................................... 38
GS2011M Pin MUX Function .................................................................................. 42
GS2011M Program and Code Restore Options ...................................................... 44
Chapter 5 Electrical Characteristics ................................................................................... 45
Absolute Maximum Ratings .......................................................................................... 45
Operating Conditions .................................................................................................... 46
Internal 1.8V Regulator ................................................................................................. 46
I/O DC Specifications .................................................................................................... 47
I/O Digital Specifications (Tri-State) Pin Types 4mA, 12mA, and 16mA ................. 47
I/O Digital Specifications for VDDIO=3.0V to 3.6V ............................................. 47
I/O Digital Specifications for VDDIO=2.25V to 2.75V ......................................... 48
I/O Digital Specs for VDDIO=1.7V to 1.98V ....................................................... 49
RTC I/O Specifications ............................................................................................ 50
Power Consumption (Estimate) .................................................................................... 50
802.11 Radio Parameters (Estimate) ............................................................................ 51
ADC Parameters ........................................................................................................... 51
Chapter 6 Package and Layout Guidelines ........................................................................ 53
GS2011Mxx Recommended PCB Footprint and Dimensions ....................................... 53

GS2011M-DS-001211, Release 0.9 Confidential Preliminary 7
Chapter 1 About This Manual
This manual describes the GS2011M Low Power module hardware specification.
Refer to the following sections:
• Revision History, page 7
• Audience, page 8
• Standards, page 8
• Documentation Conventions, page 8
• Documentation, page 11
• Contacting GainSpan Technical Support, page 12
• Returning Products to GainSpan, page 13
• Accessing the GainSpan Portal, page 14
• Ordering Information, page 14
Revision History
This version of the GainSpan GS2011M Low Power WiFi Data Sheet contains the
following new information listed in Table 1, page 7.
Table 1 Revision History
Version Date Remarks
0.6 April 2013 Initial Release
0.7 January 2014
Updated Pinout and Signal description diagram
and table (see GS2011Mxx Device Pin-out,
page 37).
Updated SDIO interface clock frequency (see
GS2100M Module Product Features, page 15).
Updated Power Consumption Estimates and
802.11 Radio Parameter Estimates (see Power
Consumption (Estimate), page 50 and 802.11
Radio Parameters (Estimate), page 51).
0.8 February 2014
Added Notation to describe the GPIO37 when
using SPI interface.. See GS2011Mxx Module
Pins Description, page 38.
0.9 March 2014 Added Regulator Notations in About this
Manual.

About This Manual GS2011M Low Power WiFi Module Data Sheet
Audience
8 Confidential Preliminary GS2011M-DS-001211, Release 0.9
Audience
This manual is designed to help system designers build low power, cost effective, flexible
platforms to add WiFi connectivity for embedded device applications using the GainSpan
GS2011M based module.
Standards
The standards that are supported by the GainSpan GS module series are:
– IEEE 802.11 b/g/n
Documentation Conventions
This manual uses the following text and syntax conventions:
– Special text fonts represent particular commands, keywords, variables, or window
sessions
– Color text indicates cross-reference hyper links to supplemental information
– Command notation indicates commands, subcommands, or command elements
Table 2, page 8, describes the text conventions used in this manual for software procedures
that are explained using the AT command line interface.
Table 2 Document Text Conventions
Convention Type Description
command syntax
monospaced font
This monospaced font represents command strings entered on a
command line and sample source code.
AT XXXX
Proportional font
description
Gives specific details about a parameter.
<Data> DATA
UPPERCASE
Variable parameter
Indicates user input. Enter a value according to the descriptions that
follow. Each uppercased token expands into one or more other token.
lowercase
Keyword parameter
Indicates keywords. Enter values exactly as shown in the command
description.
[ ]
Square brackets
Enclose optional parameters. Choose none; or select one or more an
unlimited number of times each. Do not enter brackets as part of any
command.
[parm1|parm2|parm3]

GS2011M Low Power WiFi Module Data Sheet About This Manual
Documentation Conventions
GS2011M-DS-001211, Release 0.9 Confidential Preliminary 9
?
Question mark
Used with the square brackets to limit the immediately following token
to one occurrence.
<ESC>
Escape sequence
Each escape sequence <ESC> starts with the ASCII character 27 (0x1B).
This is equivalent to the Escape key.
<ESC>C
<CR>
Carriage return Each command is terminated by a carriage return.
<LF>
Line feed Each command is terminated by a line feed.
<CR> <LF>
Carriage return
Line feed
Each response is started with a carriage return and line feed with some
exceptions.
< >
Angle brackets
Enclose a numeric range, endpoints inclusive. Do not enter angle
brackets as part of any command.
<SSID>
=
Equal sign
Separates the variable from explanatory text. Is entered as part of the
command.
PROCESSID = <CID>
.
dot (period)
Allows the repetition of the element that immediately follows it multiple
times. Do not enter as part of the command.
.AA:NN can be expanded to 1:01 1:02 1:03.
A.B.C.D
IP address
IPv4-style address.
10.0.11.123
X:X::X:X
IPv6 IP address
IPv6-style address.
3ffe:506::1
Where the : : represents all 0x for those address components not
explicitly given.
LINE
End-to-line input token
Indicates user input of any string, including spaces. No other parameters
may be entered after input for this token.
string of words
WORD
Single token
Indicates user input of any contiguous string (excluding spaces).
singlewordnospaces
Table 2 Document Text Conventions (Continued)
Convention Type Description

About This Manual GS2011M Low Power WiFi Module Data Sheet
Documentation Conventions
10 Confidential Preliminary GS2011M-DS-001211, Release 0.9
Table 3, page 10, describes the symbol conventions used in this manual for notification and
important instructions.
Table 3 Symbol Conventions
Icon Type Description
Note
Provides helpful suggestions needed in understanding
a feature or references to material not available in the
manual.
Alert Alerts you of potential damage to a program, device,
or system or the loss of data or service.
Caution Cautions you about a situation that could result in
minor or moderate bodily injury if not avoided.
Warning Warns you of a potential situation that could result in
death or serious bodily injury if not avoided.
Electro-Static Discharge
(ESD)
Notifies you to take proper grounding precautions
before handling a product.

GS2011M Low Power WiFi Module Data Sheet About This Manual
Documentation
GS2011M-DS-001211, Release 0.9 Confidential Preliminary 11
Documentation
The GainSpan documentation suite listed in Table 4, page 11 includes the part number,
documentation name, and a description of the document. The documents are available from
the GainSpan Portal. Refer to Accessing the GainSpan Portal, page 14 for details.
Table 4 Documentation List
Part Number Document Title Description
GS2K-QS-001205 GainSpan GS2000 Based Module Kit
Quick Start Guide
Provides an easy to follow guide on
how to unpack and setup GainSpan
GS2000 based module kit for the
GS2011M and GS2100M modules.
GS2K-EVB-FP-UG-001206 GainSpan GS2000 Based Module
Programming User Guide
Provides users steps to program the
on-board Flash on the GainSpan
GS2000 based modules using DOS or
Graphical User Interface utility
provided by GainSpan. The user guide
uses the evaluation boards as a
reference example board.
GS-S2W-APP-PRG-RG-001208
GainSpan Serial-to-WiFi Adapter
Application Programmer Reference
Guide
Provides a complete listing of AT serial
commands, including configuration
examples for initiating, maintaining,
and evaluating GainSpan WiFi series
modules.
GS2K-EVB-HW-UG-001210
GainSpan GS2000 Based Module
Evaluation Board Hardware User
Guide.
Provides instructions on how to setup
and use the GS2000 based module
evaluation board along with component
description, jumper settings, board
specifications, and pinouts.
GS2011M-DS-001211 GainSpan GS2011M Low Power
WiFi Module Data Sheet
Provides information to help WiFi
system designers to build systems using
GainSpan GS2011M module and
develop wireless applications.
GS2100M-DS-001212 GainSpan GS2100M Low Power
WiFi Module Data Sheet
Provides information to help WiFi
system designers to build systems using
GainSpan GS2100M module and
develop wireless applications.
GS2011MxxS-DS-001214 GainSpan GS2011MxxS Low Power
WiFi Module Data Sheet
Provides information to help WiFi
system designers to build systems using
GainSpan GS2011MxxS module and
develop wireless applications.

About This Manual GS2011M Low Power WiFi Module Data Sheet
Contacting GainSpan Technical Support
12 Confidential Preliminary GS2011M-DS-001211, Release 0.9
Documentation Feedback
We encourage you to provide feedback, comments, and suggestions so that we can improve
the documentation. You can send your comments by logging into GainSpan Support Portal.
If you are using e-mail, be sure to include the following information with your comments:
– Document name
– URL or page number
– Hardware release version (if applicable)
– Software release version (if applicable)
Contacting GainSpan Technical Support
Use the information listed in Table 5, page 12, to contact the GainSpan Technical Support.
For more Technical Support information or assistance, perform the following steps:
1. Point your browser to http://www.gainspan.com.
2. Click Contact, and click Request Support.
3. Log in using your customer Email and Password.
4. Select the Location and click Contact.
5. Select Support Question tab.
6. Select Add New Question.
7. Enter your technical support question, product information, and a brief description.
The following information is displayed:
• Telephone number contact information by region
• Links to customer profile, dashboard, and account information
• Links to product technical documentation
• Links to PDFs of support policies
Table 5 GainSpan Technical Support Contact Information
North America 1 [phone] - [email protected]
Outside North America
Europe: [email protected]
China: [email protected]
Asia: [email protected]
Postal Address
GainSpan Corporation
3590 North First Street
Suite 300
San Jose, CA 95134 U.S.A.

GS2011M Low Power WiFi Module Data Sheet About This Manual
Returning Products to GainSpan
GS2011M-DS-001211, Release 0.9 Confidential Preliminary 13
Returning Products to GainSpan
If a problem cannot be resolved by GainSpan technical support, a Return Material
Authorization (RMA) is issued. This number is used to track the returned material at the
factory and to return repaired or new components to the customer as needed.
For more information about return and repair policies, see the customer support web page
at: https://www.gainspan.com/secure/login.
To return a hardware component:
1. Determine the part number and serial number of the component.
2. Obtain an RMA number from Sales/Distributor Representative.
3. Provide the following information in an e-mail or during the telephone call:
– Part number and serial number of component
– You name, organization name, telephone number, and fax number
– Description of the failure
4. The support representative validates your request and issues an RMA number for
return of the components.
5. Pack the component for shipment.
Guidelines for Packing Components for Shipment
To pack an ship individual components:
– When you return components, make sure they are adequately protected with
packing materials and packed so that the pieces are prevented from moving
around inside the carton.
– Use the original shipping materials if they are available.
– Place individual components in electrostatic bags.
– Write the RMA number on the exterior of the box to ensure proper tracking.
NOTE: Do not return any components to GainSpan Corporation unless you have
first obtained an RMA number. GainSpan reserves the right to refuse shipments
that do not have an RMA. Refused shipments will be returned to the customer by
collect freight.
CAUTION! Do not stack any of the components.

About This Manual GS2011M Low Power WiFi Module Data Sheet
Accessing the GainSpan Portal
14 Confidential Preliminary GS2011M-DS-001211, Release 0.9
Accessing the GainSpan Portal
To find the latest version of GainSpan documentation supporting the GainSpan product
release you are interested in, you can search the GainSpan Portal website by performing the
following steps:
1. Go to the GainSpan Support Portal website.
2. Log in using your customer Email and Password.
3. Click the Actions tab to buy, evaluate, or download GainSpan products.
4. Click on the Documents tab to search, download, and print GainSpan product
documentation.
5. Click the Software tab to search and download the latest software versions.
6. Click the Account History tab to view customer account history.
7. Click the Legal Documents tab to view GainSpan Non-Disclosure Agreement
(NDA).
8. Click Download on the Item Browser section to open or save the document.
Ordering Information
To order GainSpan’s GS2011Mxx low power module contact a GainSpan Sales/Distributor
Representative. Table 6, page 14 lists the GainSpan device information.
NOTE: You must first contact GainSpan to set up an account, and obtain a
customer user name and password before you can access the GainSpan Portal.
Table 6 GS2011Mxx Ordering Information
Device Description Ordering Number Revision
Low power module with on-board antenna GS2011MIZ
Low power module with external antenna GS2011MIE
NOTE: Modules ship with test code ONLY. Designers must first program the
modules with a released firmware version. Designers should bring out GPIO27
pin (option to pull this pin to VDDIO during reset or power-on) and UART0 or SPI0
pins to enable programming of firmware into the module. For details refer to the
Programming the GainSpan Modules document.

GS2011M-DS-001211, Release 0.9 Confidential Preliminary 15
Chapter 2 GS2011M Overview
This chapter describes the GainSpan®GS2011M low power module hardware specification
overview.
• Product Overview, page 15
• GS2011M Module Product Features, page 15
Product Overview
The GS2011M low power based module provides cost effective, low power, and flexible
platform to add WiFi connectivity for embedded devices for a variety of applications, such
as wireless sensors and thermostats. It uses GS2000 SoC, which combines ARM®Cortex
M3-based processors with a 802.11b/g/n Radio, MAC, security, and PHY functions, RTC
and SRAM, up to 4 MB FLASH, and on board and off module certified antenna options.
The module provides a WiFi and regulatory certified IEEE 802.11b/g/n radio with
concurrent network processing services for variety of applications, while leverage existing
802.11 wireless network infrastructures.
GS2011M Module Product Features
• Family of modules with different antenna and output power options:
• GS2011MIx 22.8mm (0.90in) x 32.5 mm (1.28in) x 3.63mm (0.143in) 48-pin
PCB Surface Mount Package. Two SKU’s are:
– GS2011MIZ (on-board antenna)
– GS2011MIE (external antenna)
• The two SKUs are pin to pin compatible, and the user has to account only for
power consumption, and on-board antenna keep out (if used) to accommodate
“one size fits all” for various end applications.
• Simple API for embedded markets covering a large range of applications
• Fully compliant with IEEE 802.11b/g/n and regulatory domains:
– 802.11n: 1x1 single stream, 20 MHz channels, 400/800ns GI, MCS0 – 7
– Data rates of 7.2, 14.4, 21.7, 28.9, 43.3, 57.8, 65.0, 72.2 Mbps
– 802.11g: OFDM modulation for data rates of 6, 9, 12, 18, 24, 36, 48 and 54
Mb/s
– 802.11b: CCK modulation rates of 5.5 and 11 Mbps; DSSS modulation for
data rate of 1 and 2 Mbps

GS2011M Overview GS2011M Low Power WiFi Module Data Sheet
GS2011M Module Product Features
16 Confidential Preliminary GS2011M-DS-001211, Release 0.9
• WiFi Solution:
– WiFi security (802.11i):
– WPA™ - Enterprise, Personal
– WPA2™ - Enterprise, Personal
– Vendor EAP Type(s):
– EAP-TTLS/MSCHAPv2, PEAPv0/EAP-MSCHAPv2,
PEAPv1/EAP-GTC, EAP-FAST, EAP-TLS
• Hardware-accelerated high-throughput AES and RC4 encryption/decryption
engines for WEP, WPA/WPA2 (AES-CCMP and TKIP).
• Additional dedicated encryption HW engine to support higher layer encryption
such as IPSEC (IPv4 and IPv6), SSL/TLS, HTTPs, PKI, digital certificates, RNG,
etc.
• Dual ARM Cortex M3 Processor Platform:
•1
st Cortex M3 processor (WLAN CPU) for WLAN software
– Implements 802.11 b/g/n WLAN protocol services
– 320 KB dedicated SRAM
– 512 KB dedicated ROM
•2
nd Cortex M3 processor (APP CPU) for networking software
– Implements networking protocol stacks and user application software
– 384 KB dedicated SRAM
– 512 KB dedicated ROM
• 64KB shared dual ported SRAM for inter-processor communications
• 320 KB assignable (under SW control) SRAM
• Support processor clock frequencies for both CPU of up to 120MHz
• Based on Advanced Microprocessor Bus Architecture (AMBA) system:
– AMBA Multilayer High-Speed Bus (AHB)
– AMBA Peripheral Bus (APB)
• On-module controller
– Manages read/write/program/erase operations to the 4 MB flash memory
device on the module
– Supports higher performance QUAD SPI protocol operations
– Active power management
• Interfaces:
• SDIO:

GS2011M Low Power WiFi Module Data Sheet GS2011M Overview
GS2011M Module Product Features
GS2011M-DS-001211, Release 0.9 Confidential Preliminary 17
– Compliant to SDIO v2.0 specification
– Interface clock frequency up to 40 MHz
– Data transfer modes: 4-bit, 1-bit SDIO, SPI
– Device mode only
• SPI:
– Two (2) general-purpose SPI interfaces (each configurable independently as
master or slave)
– The SPI pins are muxed with other functions such as GPIO
– Supports clock rates of up to 30 MHz (master mode) and up to 10 MHz (slave
mode)
– Protocols supported include: Motorola SPI, TI Synchronous Serial Protocol
(SSP) and National Semiconductor Microwire
– Supports SPI mode 0 thru 3 (software configurable)
• UART:
– Two (2) multi-purpose UART interfaces operating in full-duplex mode
– 16450/16550 compatible
– Optional support for flow control using RTS/CTS signaling for high data
transfer rates
– Standard baud rate from 9600 bps up to 921.6 kbps (additional support for
higher non-standard rates using baud rates up to 7.5 MHz
• GPIOs:
– Up to 27 configurable general purpose I/O
• Single 3.3V supply option
– I/O supply voltage 1.8 ~ 3.3V option
• Three (3) PWM output
•I
2C master/slave interface
• Two 12-bit ADC channels, sample rate from 10 kS/s to 2 MS/s
• Three (3) RTC I/O that can be configured as:
– Up to three alarm inputs to asynchronously awaken the chip.
– Support of up to two control outputs for power supply and sensors.
• Embedded RTC (Real Time Clock) can run directly from battery.
• Power supply monitoring capability.
NOTE: Tested with current test platform up to 33 MHz.

GS2011M Overview GS2011M Low Power WiFi Module Data Sheet
GS2011M Module Product Features
18 Confidential Preliminary GS2011M-DS-001211, Release 0.9
• Low-power mode operations
– Standby, Sleep, and Deep Sleep
• FCC/IC/ETSI/TELEC/WiFi Certification (TBD)

GS2011M-DS-001211, Release 0.9 Confidential Preliminary 19
Chapter 3 GS2011M Architecture
This chapter describes the GainSpan®GS2011M Low Power module architecture.
• Architecture Description, page 19
• Wireless LAN and System Control Subsystem, page 21
Architecture Description
The GainSpan GS2011M module (see Figure 1, page 20) is based on a highly integrated
GS2000 ultra low power WiFi System-on-Chip (SoC) that contains the following:
• The GS2000 SoC contains two ARM Cortex M3 CPUs, a compatible 802.11
radio, security, on-chip memory, and variety of peripherals in a single package.
– One ARM core is dedicated to Networking Subsystems, and the other
dedicated to Wireless LAN Subsystems.
– The module carries an 802.11/g/n radio with on board 32KHz & 40 MHz
crystal circuitries, RF, and on-board antenna or external antenna options.
• On module 4 Mega Byte FLASH device that contains the user embedded
applications and data such as web pages.
• Variety of interfaces are available such as two UART blocks using only two data
lines per port with optional hardware flow controls, two SPI blocks (one SDIO is
shared function with one for the SPI interfaces), I2C with Master or slave
operation, JTAG port, low-power 12-bit ADC capable of running at up to 2M
samples/Sec., GPIO’s, and LED Drivers/GPIO with 16mA capabilities.
• GS2011Mxx has a VRTC pin that is generally connected to always available
power source such as battery or line power. This provides power to the Real Time
Clock (RTC) block on the SoC. The module contains a 1.8V regulator that is
turned on/off when going into the lowest power mode, i.e. standby mode. The
module also has VDDIO power supply input to provide the logic signal level for
the I/O pins. VDDIO must turn on/off with the 1.8V power.

GS2011M Architecture GS2011M Low Power WiFi Module Data Sheet
Architecture Description
20 Confidential Preliminary GS2011M-DS-001211, Release 0.9
Figure 1 GS2011M Block Diagram