• Low Supply Voltage Range: 3.6 V Down to 1.8 V
• Ultra-Low Power Consumption
  • Active Mode (AM): All System Clocks Active 230 µA/MHz at 8 MHz, 3.0 V, Flash Program Execution (Typical) 110 µA/MHz at 8 MHz, 3.0 V, RAM Program Execution (Typical)
  • Standby Mode (LPM3): Real-Time Clock (RTC) With Crystal, Watchdog, and Supply Supervisor Operational, Full RAM Retention, Fast Wakeup: 1.7 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 Wakeup: 1.2 µA at 3.0 V (Typical)
  • Off Mode (LPM4): Full RAM Retention, Supply Supervisor Operational, Fast Wakeup: 1.2 µA at 3.0 V (Typical)
  • Shutdown Mode (LPM4.5): 0.1 µA at 3.0 V (Typical)
• Wake up From Standby Mode in 3.5µs (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 System
  • FLL Control Loop for Frequency Stabilization
  • Low-Power Low-Frequency Internal Clock Source (VLO)
  • Low-Frequency Trimmed Internal Reference Source (REFO)
  • 32-kHz Crystals
  • High-Frequency Crystals up to 32 MHz
• 16-Bit Timer TA0, Timer_A With Five Capture/Compare Registers
• 16-Bit Timer TA1, Timer_A With Three Capture/Compare Registers
• 16-Bit Timer TB0, Timer_B With Seven Capture/Compare Shadow Registers
• Up to Four Universal Serial Communication Interfaces
  • USCI_A0, USCI_A1, USCI_A2, and USCI_A3 Each Support:
    • Enhanced UART Supports Automatic Baud-Rate Detection
    • IrDA Encoder and Decoder
    • Synchronous SPI
  • USCI_B0, USCI_B1, USCI_B2, and USCI_B3 Each Support:
    • I2C
    • Synchronous SPI
• 12-Bit Analog-to-Digital Converter (ADC)
  • Internal Reference
  • Sample-and-Hold
  • Autoscan Feature
  • 14 External Channels, 2 Internal Channels
• Hardware Multiplier Supports 32-Bit Operations
• Serial Onboard Programming, No External Programming Voltage Needed
• Three-Channel Internal DMA
• Basic Timer With RTC Feature
• Section 3 Summarizes the Available Family Members
• For Complete Module Descriptions, See the MSP430x5xx and MSP430x6xx Family User's Guide (SLAU208)

• Analog and Digital Sensor Systems
• Digital Motor Controls
• Remote Controls
• Thermostats
• Digital Timers
• Hand-Held Meters

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 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 the device to wake up from low-power modes to active mode in 3.5µs (typical).

The MSP430F543xA and MSP430F541xA series are microcontroller configurations with three 16-bit timers, a high-performance 12-bit ADC, up to four universal serial communication interfaces (USCIs), a hardware multiplier, DMA, an RTC module with alarm capabilities, and up to 87I/O pins.

Typical applications for this device include analog and digital sensor systems, digital motor control, remote controls, thermostats, digital timers, and hand-held meters.