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.