1.1 Features 1
• Low Supply Voltage Range: 1.8 V to 3.6 V
• Ultra-Low Power Consumption:
– Active Mode: 400 μA at 1 MHz, 3 V
– Standby Mode: 1.6 μA
– Off Mode (RAM Retention): 0.1 μA
• Five Power-Saving Modes
• Wake up From Standby Mode in Less Than 6 μs
• Frequency-Locked Loop, FLL+
• 16-Bit RISC Architecture, 125-ns Instruction Cycle
Time
• Three Independent 16-Bit Sigma-Delta Analog-to-
Digital Converters (ADCs) With Differential PGA
Inputs
• 16-Bit Timer_A With Three Capture/Compare
Registers
• Integrated LCD Driver for 128 Segments
• Serial Communication Interface (USART),
Asynchronous UART or Synchronous SPI
Selectable by Software
• 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
• Bootloader (BSL)
• Family Members Include:
– MSP430F423
8KB + 256 B of Flash Memory, 256 B of RAM
– MSP430F425
16KB + 256 B of Flash Memory, 512 B of RAM
– MSP430F427
32KB + 256 B of Flash Memory, 1KB of RAM
• Available in 64-Pin Quad Flat Pack (LQFP)
• For Complete Module Descriptions, See the
MSP430x4xx Family User's Guide

1.2 Applications
• Handheld Metering Equipment
• Weigh Scales
• Energy Meters

1.3 Description
The TI 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 the device to wake up from lowpower
modes to active mode in less than 6 μs.
The MSP430F42x series are microcontroller configurations with three independent 16-bit sigma-delta
ADCs, each with an integrated differential programmable gain amplifier input stage. Also included is a
built-in 16-bit timer, 128-segment LCD drive capability, hardware multiplier, and 14 I/O pins.
Typical applications include high-resolution applications such as handheld metering equipment, weigh
scales, and energy meters.