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.