1.1 Features 1
• 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, up to 12-MHz System
Clock
• Basic Clock Module Configurations
– Internal Frequencies up to 12 MHz With Two
Calibrated Frequencies
– Internal Very-Low-Power Low-Frequency (LF)
Oscillator
– High-Frequency (HF) Crystal up to 16 MHz
– Resonator
– External Digital Clock Source
• Up to Three 24-Bit Sigma-Delta Analog-to-Digital
Converters (ADCs) With Differential PGA Inputs
• 16-Bit Timer_A With Three Capture/Compare
Registers
• Serial Communication Interface (USART),
Asynchronous UART or Synchronous SPI
Selectable by Software
• 16-Bit Hardware Multiplier
• Brownout Detector
• Supply Voltage Supervisor and Monitor With
Programmable Level Detection
• Serial Onboard Programming, No External
Programming Voltage Needed Programmable
Code Protection by Security Fuse
• On-Chip Emulation Module
• Device Comparison Summarizes the Available
Family Members
• For Complete Module Descriptions, See the
MSP430x2xx Family User's Guide

1.2 Applications
• Single-Phase Electricity Meters
• Digital Power Monitoring
• Sensor Applications

1.3 Description
The TI MSP 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 the device to wake up from low-power modes to
active mode in less than 1 μs.
The MSP430AFE2x3 devices are ultra-low-power mixed signal microcontrollers integrating three
independent 24-bit sigma-delta ADCs, one 16-bit timer, one 16-bit hardware multiplier, USART
communication interface, watchdog timer, and 11 I/O pins.
The MSP430AFE2x2 devices are identical to the MSP430AFE2x3, except that there are only two 24-bit
sigma-delta ADCs integrated.
The MSP430AFE2x1 devices are identical to the MSP430AFE2x3, except that there is only one 24-bit
sigma-delta ADC integrated.