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).

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.

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
• Brownout Detector
• 10-Bit 200-ksps A/D Converter With Internal Reference, Sample-and-Hold, and Autoscan (See )
• Serial Onboard Programming, No External Programming Voltage Needed, Programmable Code Protection by Security Fuse
• On-Chip Emulation Logic With Spy-Bi-Wire Interface
• 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)