原标题：TI eZ430-TMS37157无线RFID开发方案

　　TI公司的MSP430F22xx系列是超低功耗混合信号微控制器,集成了两个16位计时器,通用串行通信接口,10位ADC和基准电压源以及数据传输控制器(DTC),两个通用运放.器件工作电压1.8V-3.6V, 1 MHz, 2.2 V工作模式的功耗为270uA,待机功耗为0.7uA,主要用于手持设备.本文介绍了MSP430F22xx主要特性,功能方框图,以及eZ430- TMS37157无线RFID开发套件主要特性, eZ430-RF USB调试接口电路图, eZ430-TMS37157目标板电路图和RFID基站电路图等.

　　The Texas Instruments MSP430 family of ultra-low-power microcontrollers consist of several devices featuring different sets of peripherals targeted for various applications. The architecture, combined with five low-power modes is optimized to achieve extended battery life in portable measurement applications. The device features a powerful 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency. The digitally controlled oscillator (DCO) allows wake-up from low-power modes to active mode in less than 1 µs.

　　The MSP430F22xx series is an ultra-low-power mixed signal microcontroller with two built-in 16-bit timers, a universal serial communication interface, 10-bit A/D converter with integrated reference and data transfer controller (DTC), two general-purpose operational amplifiers in the MSP430F22x4 devices, and 32 I/O pins.

　　MSP430F22xx主要特性:

　　Low Supply Voltage Range: 1.8 V to 3.6 V

　　Ultra-Low Power Consumption

　　Active Mode: 270 µA at 1 MHz, 2.2 V

　　Standby Mode: 0.7 µ

　　Off Mode (RAM Retention): 0.1 µA

　　Ultra-Fast Wake-Up From Standby Mode in Less Than 1 µs

　　16-Bit RISC Architecture, 62.5-ns Instruction Cycle Time

　　Basic Clock Module Configurations

　　Internal Frequencies up to 16 MHz With Four Calibrated Frequencies to %plusm;1%

　　Internal Very-Low-Power Low-frequency Oscillator

　　32-kHz Crystal

　　High-Frequency (HF) Crystal up to 16 MHz

　　Resonator

　　External Digital Clock Source

　　External Resistor

　　16-Bit Timer_A With Three Capture/Compare Registers

　　16-Bit Timer_B With Three Capture/Compare Registers

　　Universal Serial Communication Interface

　　Enhanced UART Supporting Auto-Baudrate Detection (LIN)

　　IrDA Encoder and Decoder

　　图1.MSP430F22x4功能方框图

　　eZ430-TMS37157无线开发套件

　　The eZ430-TMS37157 is a complete USB-based MSP430 wireless development tool providing the hardware and software to evaluate the MSP430F2274 microcontroller and the TMS37157 passive low-frequency interface (PaLFI) RFID transponder.

　　The eZ430-TMS37157 uses Code Composer Essentials (CCE) or IAR Embedded Workbench Integrated Development Environment (IDE) to write, download, and debug an application. The debugger is unobtrusive, allowing the user to run an application at full speed with both hardware breakpoints and single stepping available while consuming no extra hardware resources.

　　The eZ430-TMS37157 target board is an out-of-the box wireless system that may be used with the USB debugging interface, as a stand-alone system with or without external sensors, or may be incorporated into an existing design.

　　The new USB debugging interface enables the eZ430-TMS37157 to remotely send and receive data from a PC using the MSP430 application UART.

　　eZ430-TMS37157无线开发套件主要特性:

　　• USB debugging and programming interface featuring a driverless installation and application backchannel

　　• 14 available development pins

　　• Highly integrated, ultra-low-power MSP430 MCU with 16-MHz performance

　　• Two general-purpose digital I/O pins connected to green and red LEDs for visual feedback

　　• Interruptible push button for user feedback

　　图2.eZ430-TMS37157外形图