The Texas Instruments MSP430 family of ultralow-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 3 µs (typical).
The MSP430F643x series are microcontroller configurations with an integrated 3.3-V LDO, a high-performance 12-bit analog-to-digital converter (ADC), comparator, two universal serial communication interfaces (USCIs), a hardware multiplier, DMA, four 16-bit timers, a real-time clock module with alarm capabilities, an LCD driver, and up to 74 I/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.
Low Supply Voltage Range: 1.8 V to 3.6 V
Active Mode (AM): All System Clocks Active: 270 µA/MHz at 8 MHz, 3.0 V, Flash Program Execution (Typical)
Standby Mode (LPM3): Watchdog With Crystal and Supply Supervisor Operational, Full RAM Retention, Fast Wake-Up: 1.8 µA at 2.2 V, 2.1 µA at 3.0 V (Typical)
Shutdown RTC Mode (LPM3.5): Shutdown Mode, Active Real-Time Clock With Crystal: 1.1 µA at 3.0 V (Typical)
Shutdown Mode (LPM4.5): 0.3 µA at 3.0 V (Typical)
Wake Up From Standby Mode in 3 µs (Typical)
16-Bit RISC Architecture, Extended Memory, Up to 20-MHz System Clock
Flexible Power Management System
Fully Integrated LDO With Programmable Regulated Core Supply Voltage
Supply Voltage Supervision, Monitoring, and Brownout