Freescale 公司的TWR-WIFI-G1011MI 模块是802.11b Wi-Fi解决方案，采用GainSpan公司的超低功耗的无线芯片GS1011，集成了802.11 无线电, MAC和基带，以及PA, 应用CPU, RTC, SRAM 与闪存。支持IEEE 802.11，具有802.11i/WPA2身份验证, AES 硬件加密。GS1011应用在保健设备，智能电网，工业控制和监视，商业/建筑物自动化以及消费类电子。本文介绍了GS1011主要特性和优势，方框图以及GainSpan Wi-Fi Tower 模块 (TWR-WIFI-G1011MI)主要特性，方框图和电路图。

GS1011：Ultra Low-Power Wireless Single Chip

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 for current designs. Along with its embedded software stack it offers a highly scalable, reliable, manageable and secure wireless link to meet the growing demand of 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.

GS1011主要特性和优势：

• 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应用：

• Healthcare

• Smart Energy

• Industrial Control and Monitoring

• Commercial/Building Automation

• Consumer

图1。GS1011方框图

GainSpan Wi-Fi Tower 模块 (TWR-WIFI-G1011MI)主要特性：

The GainSpan Wi-Fi Tower Module (TWR-WIFI-G1011MI) is a low-cost evaluation, demonstration and development board that features an 802.11b solution from GainSpan. The following list summarizes the features of the TWR-WIFI-G1011MI:

GainSpan GS1011MIP Wi-Fi module

Compliant to 802.11b and operates with standard 802.11 b/g/n access points at speeds up to 11 Mbps

Supports Infrastructure or Adhoc mode

UART and SPI interfaces

Up to 3 MHz in SPI Slave Mode

Up to 921.6 kbps baud rate on UART

Full Wi-Fi stack including WPS and optional networking stack and services

802.11i Security

WEP, WPA, WPA2-PSK, Enterprise

Embedded Web Server for Provisioning

Certified RF Module: FCC/IC, ETSI, RoHS, Compliant with JAPAN regulatory

GS1011MIP module is a highly integrated ultra low power Wi-Fi module that contains the following:

GainSpan’s GS1011 Wireless SoC, which contains media access controller (MAC), baseband processor, on-chip flash memory and SRAM, and a network processor in a single package.

Built in certified PCB trace antenna or external Antenna Options and onboard 32 KHz & 44 MHz crystal circuitries.

The GS1011MIP has a capability of +8 dBm (typical) output power at the antenna Module includes a variety of I/O interfaces:

Two UART with optional hardware flow control support

Two SPI block with Master or Slave Operation

I2C with Master or slave operation

Two low-power 10-bit ADC capable of running at up to 32 Ksamples/Sec.

GPIO’s, and LED Drivers/GPIO with 20mA capabilities, JTAG

图2。TWR-WIFI-G1011MI方框图

The TWR-WIFI-G1011MI module connects to the Freescale Tower platform using the SPI or UART interface and uses the TCP/IP stack of the Freescale MQX system. The module firmware supports basic AT command set and the MQX driver for the GS1011MIP communicate using these AT command sets. By default the SPI interface is used.

The TWR-WIFI-G1011MI peripheral module enables easy-to-use 802.11b Wi-Fi connectivity for your application development using the Tower System. This FCC-certified module comes with complimentary MQX software and enables you to quickly go from the lab to production with the same Wi-Fi hardware.

The on-board GS1011MIP Wi-Fi module from GainSpan features a highly integrated wireless SOC with 802.11 radio, MAC and Baseband, Integrated PA, Application CPU, RTC, SRAM and FLASH.

TWR-WIFI-G1011MI Module Features:

GS1011MIP Wi-Fi module from GainSpan

Operates with standard 802.11 b/g/n access points at speeds up to 11 Mbps

Infrastructure or Adhoc mode

UART and SPI interfaces

Up to 3 Mbps in SPI Slave Mode

Up to 921.6 kbps on UART

Full Wi-Fi stack including WPS and optional networking stack and services

802.11i Security

WEP, WPA, WPA2-PSK, Enterprise

Certified RF Module: Wi-Fi, FCC, IC, Japan, ETSI, RoHS

图3。TWR-WIFI-G1011MI外形图

图4。TWR-WIFI-G1011MI方框图

图5。TWR-WIFI-G1011MI电路图（1）

图6。TWR-WIFI-G1011MI电路图（2）