The Texas Instruments MSP430 family of ultralow-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 MSP430G2x01/11 series is an ultralow-power mixed signal microcontroller with a built-in 16-bit timer and ten I/O pins. The MSP430G2x11 family members have a versatile analog comparator.
  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.

  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
  Brownout Detector
  On-Chip Comparator for Analog Signal Compare Function or Slope A/D
  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 a 14-Pin Plastic Small-Outline Thin Package (TSSOP), 
  14-Pin Plastic Dual Inline Package (PDIP), and 16-Pin QFN
  For Complete Module Descriptions, See the MSP430x2xx Family User's Guide （SLAU144）