MSP430F552x/MSP430F551x Mixed-Signal MCUs Texas Instruments MSP430F552x/MSP430F551x Mixed-Signal Microcontrollers (MCUs) are ultra-low-power MCUs that are configured with an integrated USB and PHY supporting USB 2.0, and four 16-bit timers. They also include a high-performance 12-bit analogue-to-digital converter (ADC), two USCIs, a hardware multiplier, DMA, and an RTC module with alarm capabilities. The MSP430F5528, MSP430F5526, MSP430F5524, and MSP430F5522 microcontrollers include all of these peripherals but have 47 I/O pins. The Texas Instruments MSP430F552x/MSP430F551x microcontrollers feature 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 devices to wake up from low-power modes to active mode in 3.5µs (typical).