MSP430

TI MSP430
設計公司德州儀器
體系結構類型存儲器-存儲器
字長/暫存器資料寬度16位
指令編碼長度小端序
擴展指令集MSP430X
通用暫存器16个（R0 – 程序计数器, R1 – 栈指针, R2 – 状态寄存器, R2/R3 – 常量生成器）

MSP430 是德州儀器生产的16位混合信号單晶片系列。该系列的單晶片专为低成本、特别是低功耗[1]的嵌入式应用设计。

应用

MSP430 單晶片可作为低功耗嵌入式设备使用，其静态电流可小于1微安。MSP430 系列單晶片的 CPU 的最高频率为 25 MHz，但也可以降低频率以降低功耗。MSP430 有6种不同的低功耗模式，在不同的模式下可以禁用不需要的时钟或 CPU。此外，MSP430 还可在1微秒内被唤醒，这可使它在睡眠模式下可以维持更长的时间，让其平均功耗最小化。

不同配置下的该设备带有常用的外设，如内部振荡器、定时器、PWM、看门狗、UART、SPI、I²C、10/12/14/16/24 位 ADC，以及掉电复位电路。此外也有一些较少使用的外设，如比较器（可与定时器配合使用来完成简单的 ADC 任务）、用于信号调理的片上运算放大器、12位DAC、LCD 驱动器、硬件乘法器、USB，以及用于处理 ADC 结果的 DMA。除了一些较老的 EPROM（如 MSP430E3xx）和大容量掩模 ROM（英语：Mask ROM） (如 MSP430Cxxx) 的版本，其余的设备都是可系统内编程的，需要使用 JTAG（使用完整的四线版本或 Spy-Bi-Wire）或内置引导加载器（Bootstrap Loader，BSL，使用UART，如RS232），在带有 USB 支持的设备上还可以使用USB接口。

然而，一些限制因素使其不易用于更复杂的嵌入式系统中。比如，MSP430 没有外部記憶體匯流排，因此它受限于內建的記憶體（最多66 KB的随机存取存储器和512 KB的闪存），这对于需要大的缓冲区或数据表的程序来说过于不足。此外，尽管 MSP430 带有 DMA 控制器，但由于缺少 DMA 输出选择的功能，要用它将数据移出芯片却并不容易。[2]

参数

超低功耗 16 位 精简指令集混合信号处理器。频率有8/16/25MHz可供选择。片上含ADC、DAC、时钟、看门狗、RAM、flash或ROM，支持I²C、CAN等。

其下又分为多个系列

x1xx系列

x2xx系列

x4xx系列，含LCD控制器。

x5xx系列


参考文献

  1. ^ MSP430 will run on grapes （页面存档备份，存于互联网档案馆） – YouTube 上的视频
  2. ^ D. Peters, D. Raskovic, and D. Thorsen, "An Energy Efficient Parallel Embedded System for Small Satellite Applications"[失效連結], ISAST Transactions on Computers and Intelligent Systems, vol. 1(2), 2009

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