FEATURES

• 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 Wake-Up 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) Supporting SPI

and I2C (See Table 1)

• Brownout Detector

• 10-Bit 200-ksps A/D Converter With Internal

Reference, Sample-and-Hold, and Autoscan

(See Table 1)

• 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 Table 1

• Available in 14-Pin Plastic Small-Outline Thin

Package (TSSOP) (PW), 14-Pin Plastic Dual

Inline Package (PDIP) (N), and 16-Pin QFN

Package (RSA)

• For Complete Module Descriptions, See the

MSP430x2xx Family User’s Guide (SLAU144)

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 MSP430G2x21/G2x31 series is an ultra-low-power mixed signal microcontroller with a built-in 16-bit timer

and ten I/O pins. The MSP430G2x31 family members 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.