1FEATURES
2• Low Supply Voltage Range: 1.8 V to 3.6 V
• Ultra-Low-Power Consumption:
– Active Mode: 200 μA at 1 MHz, 2.2 V
– Standby Mode: 0.7 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
• Scan Interface for Background Water, Heat,
and Gas Volume Measurement
• 16-Bit Timer_A With Three Capture/Compare
Registers
• 16-Bit Timer_A With Five Capture/Compare
Registers
• Integrated LCD Driver for Up to 96 Segments
• On-Chip Comparator
• Serial Onboard Programming, No External
Programming Voltage Needed Programmable
Code Protection by Security Fuse
• Brownout Detector
• Supply Voltage Supervisor and Monitor With
Programmable Level Detection
• Bootstrap Loader (BSL) in Flash Devices
• Family Members Include:
– MSP430FW423
8KB + 256B Flash Memory, 256B RAM
– MSP430FW425
16KB + 256B Flash Memory, 512B RAM
– MSP430FW427
32KB + 256B Flash Memory, 1KB RAM
– MSP430FW428
48KB + 256B Flash Memory, 2KB RAM
– MSP430FW429
60KB + 256B Flash Memory, 2KB RAM
• Available in 64-Pin Quad Flat Pack (QFP)
• For Complete Module Descriptions, See the
MSP430x4xx Family User's Guide, Literature
Number SLAU056

APPLICATIONS
• Analog Sensor Systems
• Digital Sensor Systems
• Gas, Heat, or Water Meters
• Industrial Meters
• Hand-Held Meters

DESCRIPTION
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 the device
to wake up from low-power modes to active mode in
less than 6 μs.
The MSP430FW42x series are microcontroller
configurations with two built-in 16-bit timers, a
comparator, 96 LCD segment drive capability, a scan
interface, and 48 I/O pins.
Typical applications include sensor systems that
capture analog signals, convert them to digital values,
and process the data and transmit them to a host
system. The comparator and timers make the
configurations ideal for gas, heat, and water meters,
industrial meters, counter applications, and hand-held meters.