1 Features

• Qualified for Automotive Applications

• Low Supply-Voltage Range: 1.8 V to 3.6 V

• Ultra-Low-Power Consumption

– Active Mode: 220 μA at 1 MHz, 2.2 V

– Standby Mode: 0.5 μA

– Off Mode (RAM Retention): 0.1 μA

• Five Power-Saving Modes

• Ultra-Fast Wakeup 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 One

Calibrated Frequency

– Internal Very Low Power Low-Frequency (LF)

Oscillator

– 32-kHz Crystal

– External Digital Clock Source

• 16-Bit Timer_A With Two Capture/Compare

Registers

• Universal Serial Interface (USI) Supports SPI and

I2C

• Brownout Detector

• 10-Bit 200-ksps Analog-to-Digital Converter (ADC)

With Internal Reference, Sample-and-Hold, and

Autoscan

• Serial Onboard Programming,

No External Programming Voltage Needed,

Programmable Code Protection by Security Fuse

• On-Chip Emulation Logic With Spy-Bi-Wire

Interface

• For Family Members Details, See Device

Characteristics

• Available Packages

– 14-Pin Plastic Small-Outline Thin Package

(TSSOP) (PW)

– 16-Pin QFN Package (RSA)

• For Complete Module Descriptions, See the

MSP430x2xx Family User’s Guide (SLAU144)

2 Applications

• Low-Cost Sensor Systems

3 Description

The Texas Instruments MSP430™ family of ultra-low- power microcontrollers consists 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 MSP430G2231 devices are ultra-low-power

mixed signal microcontrollers with a built-in 16-bit

timer and ten I/O pins. The MSP430G2231 devices

have a 10-bit A/D converter and built-in

communication capability using synchronous

protocols (SPI or I2C). For configuration details, see

Table 1.

Typical applications include low-cost sensor systems

that capture analog signals, convert them to digital

values, and then process the data for display or for transmission to a host system.