MSP430x26x系列MCU用户手册：简化开发指南

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"MSP430x26x Family Users Guide（MSP430F2619等MCU用户手册）是一份详尽的文档，针对MSP430x2xx系列混合信号处理器设计，旨在帮助开发者更有效地利用这些微控制器。手册主要关注该系列中的模块和外设，但需注意，并非所有设备都具备全部功能模块或外设，不同设备家族间可能存在实施细节差异，甚至某些模块或功能可能仅在特定型号上得到支持。手册首先强调了阅读的重要性，指出它提供了一般性的介绍，而不涉及每个模块和外设的详细特性，如引脚功能、内部信号连接以及操作参数，因为这些会因具体设备而异。用户在需要获取这类详细信息时，应查阅相应的设备特定数据手册。此外，手册还提到了与德州仪器（TI）相关的其他文档资源，开发人员可以访问TI的官方网站<http://www.ti.com/msp430>获取更多支持和参考资料。特别指出的是，此设备仅限于实验室测试环境使用，因为它会产生、使用并辐射射频能量，但在符合美国联邦通信委员会（FCC）第15部分J子部分的规定方面，可能并未经过全面测试。因此，在实际应用中，必须确保遵循所有相关的法规和限制，以确保设备的安全和合规性。 MSP430x26x Family Users Guide为MSP430F2619等MSP430系列微控制器的使用者提供了一个基础平台，帮助他们理解和利用这些设备的功能，同时提醒他们在开发过程中务必参考设备特性和法规要求，以确保项目的顺利进行和产品的合规使用。"

Architecture

1-2

Introduction

1.1 Architecture

The MSP430 incorporates a 16-bit RISC CPU, peripherals, and a flexible clock

system that interconnect using a von-Neumann common memory address

bus (MAB) and memory data bus (MDB). Partnering a modern CPU with

modular memory-mapped analog and digital peripherals, the MSP430 offers

solutions for demanding mixed-signal applications.

Key features of the MSP430x2xx family include:

- Ultralow-power architecture extends battery life

J 0.1-μA RAM retention

J 0.8-μA real-time clock mode

J 250-μA / MIPS active

- High-performance analog ideal for precision measurement

J Comparator-gated timers for measuring resistive elements

- 16-bit RISC CPU enables new applications at a fraction of the code size.

J Large register file eliminates working file bottleneck

J Compact core design reduces power consumption and cost

J Optimized for modern high-level programming

J Only 27 core instructions and seven addressing modes

J Extensive vectored-interrupt capability

- In-system programmable Flash permits flexible code changes, field

upgrades and data logging

1.2 Flexible Clock System

The clock system is designed specifically for battery-powered applications. A

low-frequency auxiliary clock (ACLK) is driven directly from a common 32-kHz

watch crystal. The ACLK can be used for a background real-time clock self

wake-up function. An integrated high-speed digitally controlled oscillator

(DCO) can source the master clock (MCLK) used by the CPU and high-speed

peripherals. By design, the DCO is active and stable in less than 2 μs at 1 Mhz.

MSP430-based solutions effectively use the high-performance 16-bit RISC

CPU in very short bursts.

- Low-frequency auxiliary clock = Ultralow-power stand-by mode

- High-speed master clock = High performance signal processing

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