Description
The STM32F051xx microcontrollers incorporate the high-performance ARM® Cortex®-M0 32-bit RISC core operating at up to 48 MHz frequency, high-speed embedded memories (up to 64 Kbytes of Flash memory and 8 Kbytes of SRAM), and an extensive range of enhanced peripherals and I/Os. All devices offer standard communication interfaces (up to two I2Cs, up to two SPIs, one I2S, one HDMI CEC and up to two USARTs), one 12-bit ADC, one 12-bit DAC, six 16-bit timers, one 32-bit timer and an advanced-control PWM timer.

Features
• Core: ARM® 32-bit Cortex®-M0 CPU, frequency up to 48 MHz
• Memories
    – 16 to 64 Kbytes of Flash memory
    – 8 Kbytes of SRAM with HW parity checking
• CRC calculation unit
• Reset and power management
    – Digital and I/O supply: VDD = 2.0 V to 3.6 V
    – Analog supply: VDDA = from VDD to 3.6 V
    – Power-on/Power down reset (POR/PDR)
    – Programmable voltage detector (PVD)
    – Low power modes: Sleep, Stop, Standby
    – VBAT supply for RTC and backup registers
• Clock management
    – 4 to 32 MHz crystal oscillator
    – 32 kHz oscillator for RTC with calibration
    – Internal 8 MHz RC with x6 PLL option
    – Internal 40 kHz RC oscillator
• Up to 55 fast I/Os
    – All mappable on external interrupt vectors
    – Up to 36 I/Os with 5 V tolerant capability
• 5-channel DMA controller
• One 12-bit, 1.0 µs ADC (up to 16 channels)
    – Conversion range: 0 to 3.6 V
    – Separate analog supply from 2.4 up to 3.6
• One 12-bit DAC channel
• Two fast low-power analog comparators with programmable input and output
• Up to 18 capacitive sensing channels supporting touchkey, linear and rotary touch sensors
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