MSP430F5438：低功耗混合信号微控制器

需积分: 0 177 浏览量更新于2024-07-25 收藏 1017KB PDF 举报

"MSP430f5438a是德州仪器（TI）推出的一款混合信号微控制器，属于MSP430F543x系列，具有极低功耗和高性能的特点，广泛应用于各种低功耗嵌入式系统设计。" MSP430F5438微控制器的主要特性包括： 1. **低供电电压范围**：该微控制器可以在1.8V至3.6V的宽电压范围内工作，这使得它适合于电池供电或者电源电压波动较大的应用场景。 2. **统一时钟系统**：MSP430F5438采用了统一的时钟系统，能够灵活地控制不同模块的时钟源，优化功耗并提高系统效率。 3. **超低功耗**：该芯片在不同的工作模式下具有极低的功耗： - **主动模式(AM)**：所有系统时钟都处于活动状态，支持高性能运行。在8MHz、3.0V条件下，使用Flash作为程序源执行时，平均电流约为230µA/MHz。 - **低功耗/低频内部时钟**（VLO）：在同样条件下，使用内部低频参考时钟（REFO），运行RAM程序时电流仅为110µA/MHz。 - **待机模式(LPM3)**：在这种模式下，可以保留高频率晶体，同时实现实时时钟、看门狗和电源监控器等功能，且快速唤醒，即使在2.2V时，电流也仅消耗1.7µA，3.0V时消耗2.1µA（典型值）。 4. **高精度内部参考和时钟源**：提供了一个可校准的16位低功耗内部参考和32kHz晶体，确保了系统在低功耗运行时的精确计时和稳定性能。 5. **丰富的定时器功能**：MSP430F5438配备了多个16位定时器，如Timer_A（TA0、TA1）和Timer_B（TB0），每个定时器都有不同的捕捉/比较寄存器，可以用于计数、定时、脉冲宽度调制等多种应用。 6. **其他功能**：包括通用计数器、看门狗定时器、低功耗振荡器（VLO）以及全RAM保留，确保快速唤醒和系统稳定性。这些特性使MSP430F5438成为适合于物联网(IoT)设备、传感器节点、便携式设备、能源管理和其他对功耗有严格要求的应用的理想选择。其强大的低功耗能力，配合灵活的定时器和多功能接口，为开发者提供了高效且节能的设计平台。通过访问www.ti.com，可以获取更多关于MSP430F5438a的详细资料和技术支持。

MSP430F543xA, MSP430F541xA

SLAS655B –JANUARY 2010–REVISED OCTOBER 2010

www.ti.com

Bootstrap Loader (BSL)

The BSL enables users to program the flash memory or RAM using a UART serial interface. Access to the

device memory via the BSL is protected by an user-defined password. Usage of the BSL requires four pins as

shown in Table 5. BSL entry requires a specific entry sequence on the RST/NMI/SBWTDIO and TEST/SBWTCK

pins. For complete description of the features of the BSL and its implementation, see the MSP430 Memory

Programming User's Guide, literature number SLAU265.

Table 5. BSL Pin Requirements and Functions

DEVICE SIGNAL BSL FUNCTION

RST/NMI/SBWTDIO Entry sequence signal

TEST/SBWTCK Entry sequence signal

P1.1 Data transmit

P1.2 Data receive

VCC Power supply

VSS Ground supply

JTAG Operation

JTAG Standard Interface

The MSP430 family supports the standard JTAG interface which requires four signals for sending and receiving

data. The JTAG signals are shared with general-purpose I/O. The TEST/SBWTCK pin is used to enable the

JTAG signals. In addition to these signals, the RST/NMI/SBWTDIO is required to interface with MSP430

development tools and device programmers. The JTAG pin requirements are shown in Table 6. For further

details on interfacing to development tools and device programmers, see the MSP430 Hardware Tools User's

Guide, literature number SLAU278.

Table 6. JTAG Pin Requirements and Functions

DEVICE SIGNAL DIRECTION FUNCTION

PJ.3/TCK IN JTAG clock input

PJ.2/TMS IN JTAG state control

PJ.1/TDI/TCLK IN JTAG data input/TCLK input

PJ.0/TDO OUT JTAG data output

TEST/SBWTCK IN Enable JTAG pins

RST/NMI/SBWTDIO IN External reset

VCC Power supply

VSS Ground supply

Spy-Bi-Wire Interface

In addition to the standard JTAG interface, the MSP430 family supports the two wire Spy-Bi-Wire interface.

Spy-Bi-Wire can be used to interface with MSP430 development tools and device programmers. The Spy-Bi-Wire

interface pin requirements are shown in Table 7. For further details on interfacing to development tools and

device programmers, see the MSP430 Hardware Tools User's Guide, literature number SLAU278.

Table 7. Spy-Bi-Wire Pin Requirements and Functions

DEVICE SIGNAL DIRECTION FUNCTION

TEST/SBWTCK IN Spy-Bi-Wire clock input

RST/NMI/SBWTDIO IN, OUT Spy-Bi-Wire data input/output

VCC Power supply

VSS Ground supply

MSP430F543xA, MSP430F541xA

SLAS655B –JANUARY 2010–REVISED OCTOBER 2010

www.ti.com

Peripherals

Peripherals are connected to the CPU through data, address, and control buses and can be handled using all

instructions. For complete module descriptions, see the MSP430x5xx Family User's Guide, literature number

SLAU208.

Digital I/O

There are up to ten 8-bit I/O ports implemented: For 100-pin options, P1 through P10 are complete. P11 contains

three individual I/O ports. For 80-pin options, P1 through P7 are complete. P8 contains seven individual I/O ports.

P9 through P11 do not exist. Port PJ contains four individual I/O ports, common to all devices.

• All individual I/O bits are independently programmable.

• Any combination of input, output, and interrupt conditions is possible.

• Pullup or pulldown on all ports is programmable.

• Drive strength on all ports is programmable.

• Edge-selectable interrupt and LPM4.5 wakeup input capability is available for all bits of ports P1 and P2.

• Read/write access to port-control registers is supported by all instructions.

• Ports can be accessed byte-wise (P1 through P11) or word-wise in pairs (PA through PF).

Oscillator and System Clock

The clock system in the MSP430x5xx family of devices is supported by the Unified Clock System (UCS) module

that includes support for a 32-kHz watch crystal oscillator (XT1 LF mode), an internal very-low-power

low-frequency oscillator (VLO), an internal trimmed low-frequency oscillator (REFO), an integrated internal

digitally controlled oscillator (DCO), and a high-frequency crystal oscillator (XT1 HF mode or XT2). The UCS

module is designed to meet the requirements of both low system cost and low power consumption. The UCS

module features digital frequency locked loop (FLL) hardware that, in conjunction with a digital modulator,

stabilizes the DCO frequency to a programmable multiple of the selected FLL reference frequency. The internal

DCO provides a fast turn-on clock source and stabilizes in less than 5 µs. The UCS module provides the

following clock signals:

• Auxiliary clock (ACLK), sourced from a 32-kHz watch crystal, a high-frequency crystal, the internal

low-frequency oscillator (VLO), the trimmed low-frequency oscillator (REFO), or the internal digitally controlled

oscillator DCO.

• Main clock (MCLK), the system clock used by the CPU. MCLK can be sourced by same sources made

available to ACLK.

• Sub-Main clock (SMCLK), the subsystem clock used by the peripheral modules. SMCLK can be sourced by

same sources made available to ACLK.

• ACLK/n, the buffered output of ACLK, ACLK/2, ACLK/4, ACLK/8, ACLK/16, ACLK/32.

Power Management Module (PMM)

The PMM includes an integrated voltage regulator that supplies the core voltage to the device and contains

programmable output levels to provide for power optimization. The PMM also includes supply voltage supervisor

(SVS) and supply voltage monitoring (SVM) circuitry, as well as brownout protection. The brownout circuit is

implemented to provide the proper internal reset signal to the device during power-on and power-off. The

SVS/SVM circuitry detects if the supply voltage drops below a user-selectable level and supports both supply

voltage supervision (the device is automatically reset) and supply voltage monitoring (SVM, the device is not

automatically reset). SVS and SVM circuitry is available on the primary supply and core supply.

Hardware Multiplier

The multiplication operation is supported by a dedicated peripheral module. The module performs operations with

32-bit, 24-bit, 16-bit, and 8-bit operands. The module is capable of supporting signed and unsigned multiplication

as well as signed and unsigned multiply and accumulate operations.

剩余103页未读，继续阅读

fjfhjmh0

粉丝: 0
资源: 1

MSP430F5438：低功耗混合信号微控制器

msp430f5438a中文资料

MSP430F5438 最小系统核心板PDF原理图PCB+AD集成库.zip

MSP430F5438A BSL烧录软件

msp430F5438a入门

msp430f5438最小

MSP430F5438A学习板

msp430f5438 ucos ii

msp430f5438最小系统板模块pcb

MSP430F5438A驱动PT100

μc/os-ii在msp430f5438

最新资源