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 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 extensive 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 3.5 µs (typical).

The MSP430F522x series are microcontroller configurations with four 16-bit timers, a high-performance 10-bit analog-to-digital converter (ADC), two universal serial communication interfaces (USCI), hardware multiplier, DMA, comparator, and real-time clock module with alarm capabilities. The MSP430F521x series include all the peripherals of the MSP430F522x series with the exception of the ADC. All devices have a split I/O supply system that allows for a seamless interface to other devices that have a nominal 1.8-V I/O interface without the need for external level translation.

Typical applications include analog and digital sensor systems, data loggers, and various general-purpose applications.


  • Dual-Supply Voltage Device
    • Primary Supply (AVCC, DVCC)
      • Powered From External Supply: 3.6 V Down to 1.8 V
      • Up to 22 General-Purpose I/O With up to Four External Interrupts
    • Low-Voltage Interface Supply (DVIO)
      • Powered From Separate External Supply: 1.62 V to 1.98 V
      • Up to 31 General-Purpose I/O With up to Twelve External Interrupts
      • Serial Communications
    • Ultra-Low Power ConsumptionWake-Up From Standby Mode in 3.5 µs (Typical)
      • Active Mode (AM):
        All System Clocks Active
        290 µA/MHz at 8 MHz, 3.0 V, Flash Program Execution (Typical)
        150 µA/MHz at 8 MHz, 3.0 V, RAM Program Execution (Typical)
      • Standby Mode (LPM3):
        Real-Time Clock With Crystal, Watchdog, and Supply Supervisor Operational, Full RAM Retention, Fast Wake-Up: 1.9 µA at 2.2 V, 2.1 µA at 3.0 V (Typical)
        Low-Power Oscillator (VLO), General-Purpose Counter, Watchdog, and Supply Supervisor Operational, Full RAM Retention, Fast Wake-Up: 1.4 µA at 3.0 V (Typical)
      • Off Mode (LPM4):
        Full RAM Retention, Supply Supervisor Operational, Fast Wake-Up: 1.1 µA at 3.0 V (Typical)
      • Shutdown Mode (LPM4.5): 0.18 µA at 3.0 V (Typical)
    • 16-Bit RISC Architecture, Extended Memory, up to 25-MHz System Clock
    • Flexible Power Management System
      • Fully Integrated LDO With Programmable Regulated Core Supply Voltage
      • Supply Voltage Supervision, Monitoring, and Brownout
    • Unified Clock System16-Bit Timer TA0, Timer_A With Five Capture/Compare Registers
      • FLL Control Loop for Frequency Stabilization
      • Low-Power Low-Frequency Internal Clock Source (VLO)
      • Low Frequency Trimmed Internal Reference Source (REFO)
      • 32-kHz Watch Crystals (XT1)
      • High-Frequency Crystals up to 32 MHz (XT2)
    • 16-Bit Timer TA1, Timer_A With Three Capture/Compare Registers
    • 16-Bit Timer TA2, Timer_A With Three Capture/Compare Registers
    • 16-Bit Timer TB0, Timer_B With Seven Capture/Compare Shadow Registers
    • Two Universal Serial Communication Interfaces10-Bit Analog-to-Digital (A/D) Converter With Internal Reference, Sample-and-Hold
      • USCI_A0 and USCI_A1 Each Support: Enhanced UART With Auto-Baudrate Detection, IrDA Encoder and Decoder, Synchronous SPI
      • USCI_B0 and USCI_B1 Each Support: I2CTM, Synchronous SPI
    • Comparator
    • Hardware Multiplier Supports 32-Bit Operations
    • Serial Onboard Programming, No External Programming Voltage Needed
    • Three Channel Internal DMA
    • Basic Timer With Real-Time Clock Feature
    • For Complete Module Descriptions, See the MSP430x5xx and MSP430x6xx Family User's Guide (SLAU208)
    • For Design Guidelines, See Designing With MSP430F522x Devices (SLAA558)