TI 公司的LM3S9B92是 Stellaris 系列MCU，采用ARM? Cortex?-M3處理器核，80MHz工作，100DMIPS性能，ARM Cortex SysTick定時(shí)器，嵌套矢量中斷控制器（NVIC），片上存儲(chǔ)器包括256KB閃存和96KB單周期SRAM，具有豐富的接口和系統(tǒng)集成功能，先進(jìn)的馬達(dá)控制和模擬特性，主要用在工業(yè)應(yīng)用，包括遙測(cè)，電子POS機(jī)器，測(cè)試測(cè)量設(shè)備，網(wǎng)絡(luò)設(shè)備和交換，工廠自動(dòng)化，HVAC和建筑物控制，游戲機(jī)，馬達(dá)控制，醫(yī)療儀器以及消防安全。本文介紹了LM3S9B92主要特性，方框圖，微控制器CPU方框圖以及Stellaris?機(jī)器人評(píng)估板(EVALBOT)主要特性，方框圖，電路圖和材料清單與元件布局圖。

Texas Instruments is the industry leader in bringing 32-bit capabilities and the full benefits of ARM? Cortex?-M3-based microcontrollers to the broadest reach of the microcontroller market. For current users of 8- and 16-bit MCUs, Stellaris with Cortex-M3 offers a direct path to the strongest ecosystem of development tools, software and knowledge in the industry. Designers who migrate to Stellaris benefit from great tools, small code footprint and outstanding performance. Even more important, designers can enter the ARM ecosystem with full confidence in a compatible roadmap from $1 to 1 GHz. For users of current 32-bit MCUs, the Stellaris family offers the industry’s first implementation of Cortex-M3 and the Thumb-2 instruction set. With blazingly-fast responsiveness, Thumb-2 technology combines both 16-bit and 32-bit instructions to deliver the best balance of code density and performance. Thumb-2 uses 26 percent less memory than pure 32-bit code to reduce system cost while delivering 25 percent better performance. The Texas Instruments Stellaris family of microcontrollers—the first ARM? Cortex?-M3 based controllers—brings high-performance 32-bit computing to cost-sensitive embedded microcontroller applications. These pioneering parts deliver customers 32-bit performance at a cost equivalent to legacy 8- and 16-bit devices, all in a package with a small footprint.

LM3S9B92主要特性：

The LM3S9B92 microcontroller has the following features:

■ ARM? Cortex?-M3 Processor Core

– 80-MHz operation; 100 DMIPS performance

– ARM Cortex SysTick Timer

– Nested Vectored Interrupt Controller (NVIC)

■ On-Chip Memory

– 256 KB single-cycle Flash memory up to 50 MHz; a prefetch buffer improves performance above 50 MHz

– 96 KB single-cycle SRAM

– Internal ROM loaded with StellarisWare software:

? Stellaris Peripheral Driver Library

? Stellaris Boot Loader

? Advanced Encryption Standard (AES) cryptography tables

? Cyclic Redundancy Check (CRC) error detection functionality

■ External Peripheral Interface (EPI)

– 8/16/32-bit dedicated parallel bus for external peripherals

– Supports SDRAM, SRAM/Flash memory, FPGAs, CPLDs

■ Advanced Serial Integration

– 10/100 Ethernet MAC and PHY

– Two CAN 2.0 A/B controllers USB 2.0 OTG/Host/Device

– Three UARTs with IrDA and ISO 7816 support (one UART with full modem controls)

– Two I2C modules

– Two Synchronous Serial Interface modules (SSI)

– Integrated Interchip Sound (I2S) module

■ System Integration

– Direct Memory Access Controller (DMA)

– System control and clocks including on-chip precision 16-MHz oscillator

– Four 32-bit timers (up to eight 16-bit), with real-time clock capability

– Eight Capture Compare PWM pins (CCP)

– Two Watchdog Timers

? One timer runs off the main oscillator

? One timer runs off the precision internal oscillator

– Up to 65 GPIOs, depending on configuration

? Highly flexible pin muxing allows use as GPIO or one of several peripheral functions

? Independently configurable to 2, 4 or 8 mA drive capability

? Up to 4 GPIOs can have 18 mA drive capability

■ Advanced Motion Control

– Eight advanced PWM outputs for motion and energy applications

– Four fault inputs to promote low-latency shutdown

– Two Quadrature Encoder Inputs (QEI)

■ Analog

– Two 10-bit Analog-to-Digital Converters (ADC) with 16 analog input channels and sample rate of one million samples/second

– Three analog comparators

– 16 digital comparators

– On-chip voltage regulator

■ JTAG and ARM Serial Wire Debug (SWD)

■ 100-pin LQFP and 108-ball BGA package

■ Industrial (-40°C to 85°C) Temperature Range

The LM3S9B92 microcontroller is targeted for industrial applications, including remote monitoring, electronic point-of-sale machines, test and measurement equipment, network appliances and switches, factory automation, HVAC and building control, gaming equipment, motion control, medical instrumentation, and fire and security.

In addition, the LM3S9B92 microcontroller offers the advantages of ARM’s widely available development tools, System-on-Chip (SoC) infrastructure IP applications, and a large user community.

Additionally, the microcontroller uses ARM’s Thumb?-compatible Thumb-2 instruction set to reduce memory requirements and, thereby, cost. Finally, the LM3S9B92 microcontroller is code-compatible to all members of the extensive Stellaris family; providing flexibility to fit our customers’ precise needs.

Texas Instruments offers a complete solution to get to market quickly, with evaluation and development boards, white papers and application notes, an easy-to-use peripheral driver library, and a strong support, sales, and distributor network. See “Ordering and Contact Information” on page 1376 for ordering information for Stellaris family devices.

LM3S9B92目標(biāo)應(yīng)用：

The Stellaris family is positioned for cost-conscious applications requiring significant control processing and connectivity capabilities such as:

■ Remote monitoring

■ Electronic point-of-sale (POS) machines

■ Test and measurement equipment

■ Network appliances and switches

■ Factory automation

■ HVAC and building control

■ Gaming equipment

■ Motion control

■ Medical instrumentation

■ Fire and security

■ Power and energy

■ Transportation

圖1。Stellaris LM3S9B92微控制器方框圖

圖2。Stellaris LM3S9B92微控制器CPU方框圖

Stellaris?機(jī)器人評(píng)估板(EVALBOT)

The Stellaris? Robotic Evaluation Board (EVALBOT) is a robotic evaluation platform for the Stellaris LM3S9B92 microcontroller. The board also uses a range of Texas Instruments’ analog components for motor drive, power supply, and communications functions. After a few minutes of assembly, the EVALBOT’s electronics are ready-to-run.

When roaming, three AA batteries supply power to the EVALBOT. The EVALBOT automatically selects USB power when tethered to a PC as a USB device or when debugging. Test points are provided to all key EVALBOT signals. Two 20-pin headers enable future wireless communications using standardized Texas Instruments’ low-power embedded radio modules (EM boards). Additional microcontroller signals are available on break-out pads arranged in rows adjacent to the microcontroller.

The EVALBOT has factory-installed quickstart software resident in on-chip Flash memory. For software debugging and Flash programming, an integrated In-Circuit Debug Interface (ICDI) requires only a single USB cable for debug and serial port functions.

圖3。Stellaris?機(jī)器人評(píng)估板(EVALBOT)外形圖

Stellaris?機(jī)器人評(píng)估板(EVALBOT)主要特性：

The evaluation kit provides a hands-on mini robotic platform for learning and using the μC/OS-III real-time kernel. The evaluation kit includes the following features:

Evaluation board with robotic capabilities

Mechanical components assembled by user

Stellaris? LM3S9B92 microcontroller

MicroSD card connector

I2S audio codec with speaker

USB Host and Device connectors

RJ45 Ethernet connector

Bright 96 x 16 blue OLED display

On-board In-Circuit Debug Interface (ICDI)

Battery power (3 AA batteries) or power through USB

Wireless communication expansion port

Robot features:

Two DC gear-motors provide drive and steering

Opto-sensors detect wheel rotation with 45° resolution

Sensors for "bump" detection

圖4。Stellaris?機(jī)器人評(píng)估板(EVALBOT)方框圖

圖5。Stellaris?機(jī)器人評(píng)估板(EVALBOT)電路圖（1）：MCU，以太網(wǎng)和USB

圖6。Stellaris?機(jī)器人評(píng)估板(EVALBOT)電路圖（2）：輪編碼器，馬達(dá)驅(qū)動(dòng)器和緩沖開(kāi)關(guān)

圖7。Stellaris?機(jī)器人評(píng)估板(EVALBOT)電路圖（3）：用戶(hù)接口，音頻和SD卡

圖8。Stellaris?機(jī)器人評(píng)估板(EVALBOT)電路圖（4）：電源

圖9。Stellaris?機(jī)器人評(píng)估板(EVALBOT)電路圖（5）：在電路調(diào)試接口
EVALBOT材料清單（BOM）：

圖10。EVALBOT元件布局圖