MSP430G2452微控制器技术手册：低功耗与多功能接口

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"MSP430G2x52 和 MSP430G2x12 是 Texas Instruments（TI）公司推出的微控制器系列，属于 MSP430 系列的成员，专为低功耗应用设计。这些器件集成了多种功能，包括模拟到数字转换器、通用串行接口（USI）以及多种低功耗模式，适用于各种嵌入式控制系统。" MSP430G2x52 和 MSP430G2x12 微控制器的特性包括： 1. **低电源电压范围**：支持 1.8V 至 3.6V 的供电电压，这使得它们能够在宽电压范围内工作，适应不同应用场景。 2. **通用串行接口 (USI)**：支持 SPI 和 I2C 协议，可与多种外部设备通信，如传感器、显示模块等。 3. **超低功耗**：在主动模式下，当工作频率为 1MHz 且电压为 2.2V 时，功耗仅为 220μA；在待机模式下，功耗仅为 0.5μA；而在关闭模式（RAM 保留）下，对于 MSP430G2x52，功耗更是低至 0.1μA。 4. **10 位 200ksps 模拟到数字转换器**：内置参考电压、采样保持和自动扫描功能，适合进行高精度的模拟信号采集。 5. **五种节能模式**：包括主动模式、待机模式、关闭模式、空闲模式和掉电模式，便于优化系统能耗。 6. **片上比较器**：用于处理和分析模拟信号。 7. **超快唤醒**：从待机模式唤醒时间小于 1μs，确保快速响应。 8. **棕色断路检测器**：保护系统免受电压下降的影响。 9. **串行在板编程**：无需外部编程电压，通过内部机制即可完成程序更新，同时提供可编程的安全保护熔丝。 10. **16 位 RISC 架构**：执行速度快，指令周期短至 62.5ns，有助于实现高效的代码执行。 11. **基本时钟模块配置**：包括四个校准频率，最高可达 16MHz，内置低频振荡器支持 32kHz 晶体。 12. **封装选项**：提供 TSSOP 封装，包括 14 引脚和 20 引脚版本，适应不同空间需求。 MSP430G2x52 和 MSP430G2x12 微控制器是针对低功耗应用而设计的高效能处理器，适合于智能仪表、无线传感器网络、便携式设备等需要长期电池供电的场合。其丰富的外设集、灵活的电源管理及强大的性能使其成为嵌入式系统开发的优选平台。

MSP430G2x52

MSP430G2x12

SLAS722D –DECEMBER 2010– REVISED AUGUST 2011

www.ti.com

Special Function Registers (SFRs)

Most interrupt and module enable bits are collected into the lowest address space. Special function register bits

not allocated to a functional purpose are not physically present in the device. Simple software access is provided

with this arrangement.

Legend rw: Bit can be read and written.

rw-0,1: Bit can be read and written. It is reset or set by PUC.

rw-(0,1): Bit can be read and written. It is reset or set by POR.

SFR bit is not present in device.

Table 6. Interrupt Enable Register 1 and 2

Address 7 6 5 4 3 2 1 0

00h ACCVIE NMIIE OFIE WDTIE

rw-0 rw-0 rw-0 rw-0

WDTIE Watchdog Timer interrupt enable. Inactive if watchdog mode is selected. Active if Watchdog Timer is configured in

interval timer mode.

OFIE Oscillator fault interrupt enable

NMIIE (Non)maskable interrupt enable

ACCVIE Flash access violation interrupt enable

Address 7 6 5 4 3 2 1 0

01h

Table 7. Interrupt Flag Register 1 and 2

Address 7 6 5 4 3 2 1 0

02h NMIIFG RSTIFG PORIFG OFIFG WDTIFG

rw-0 rw-(0) rw-(1) rw-1 rw-(0)

WDTIFG Set on watchdog timer overflow (in watchdog mode) or security key violation.

Reset on V

power-on or a reset condition at the RST/NMI pin in reset mode.

OFIFG Flag set on oscillator fault.

PORIFG Power-On Reset interrupt flag. Set on V

power-up.

RSTIFG External reset interrupt flag. Set on a reset condition at RST/NMI pin in reset mode. Reset on V

power-up.

NMIIFG Set via RST/NMI pin

Address 7 6 5 4 3 2 1 0

03h

MSP430G2x52

MSP430G2x12

SLAS722D –DECEMBER 2010– REVISED AUGUST 2011

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 MSP430x2xx Family User's Guide (SLAU144).

Oscillator and System Clock

The clock system is supported by the basic clock module that includes support for a 32768-Hz watch crystal

oscillator, an internal very-low-power low-frequency oscillator and an internal digitally controlled oscillator (DCO).

The basic clock module is designed to meet the requirements of both low system cost and low power

consumption. The internal DCO provides a fast turn-on clock source and stabilizes in less than 1 µs. The basic

clock module provides the following clock signals:

• Auxiliary clock (ACLK), sourced either from a 32768-Hz watch crystal or the internal LF oscillator.

• Main clock (MCLK), the system clock used by the CPU.

• Sub-Main clock (SMCLK), the sub-system clock used by the peripheral modules.

The DCO settings to calibrate the DCO output frequency are stored in the information memory segment A.

Calibration Data Stored in Information Memory Segment A

Calibration data is stored for both the DCO and for ADC10 organized in a tag-length-value structure.

Table 9. Tags Used by the ADC Calibration Tags

NAME ADDRESS VALUE DESCRIPTION

TAG_DCO_30 0x10F6 0x01 DCO frequency calibration at V

= 3 V and T

= 30°C at calibration

TAG_ADC10_1 0x10DA 0x10 ADC10_1 calibration tag

TAG_EMPTY - 0xFE Identifier for empty memory areas

Table 10. Labels Used by the ADC Calibration Tags

ADDRESS

LABEL CONDITION AT CALIBRATION / DESCRIPTION SIZE

OFFSET

CAL_ADC_25T85 INCHx = 0x1010, REF2_5 = 1, T

= 85°C word 0x0010

CAL_ADC_25T30 INCHx = 0x1010, REF2_5 = 1, T

= 30°C word 0x000E

CAL_ADC_25VREF_FACTOR REF2_5 = 1, T

= 30°C, I

(VREF+)

= 1 mA word 0x000C

CAL_ADC_15T85 INCHx = 0x1010, REF2_5 = 0, T

= 85°C word 0x000A

CAL_ADC_15T30 INCHx = 0x1010, REF2_5 = 0, T

= 30°C word 0x0008

CAL_ADC_15VREF_FACTOR REF2_5 = 0, T

= 30°C, I

(VREF+)

= 0.5 mA word 0x0006

CAL_ADC_OFFSET External VREF = 1.5 V, f

(ADC10CLK)

= 5 MHz word 0x0004

CAL_ADC_GAIN_FACTOR External VREF = 1.5 V, f

(ADC10CLK)

= 5 MHz word 0x0002

CAL_BC1_1MHz - byte 0x0009

CAL_DCO_1MHz - byte 0x00008

CAL_BC1_8MHz - byte 0x0007

CAL_DCO_8MHz - byte 0x0006

CAL_BC1_12MHz - byte 0x0005

CAL_DCO_12MHz - byte 0x0004

CAL_BC1_16MHz - byte 0x0003

CAL_DCO_16MHz - byte 0x0002

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MSP430G2452微控制器技术手册：低功耗与多功能接口

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