STM32U031C8U6 is an ultra-low power Arm®-based 32bit microcontroller. This device embeds high-speed memories (up to 64Kbyte flash memory) and an extensive range of enhanced I/Os and peripherals connected to APB and AHB buses, and a 32bit multi-AHB bus matrix. It also embeds protection mechanisms for embedded flash memory and SRAM, such as readout protection and write protection. This device offers a 12-bit ADC, a 12-bit DAC, an embedded rail-to-rail analogue comparator, one operational amplifier, a low-power RTC, one general-purpose 32bit timer, one 16-bit PWM timer dedicated to motor control, three general-purpose 16-bit timers, and two 16-bit low-power timers. It also features standard and advanced communication interfaces, namely three I2Cs, two SPIs, four USARTs and two low-power UARTs.

• 64Kbytes of flash memory, 1.71V to 3.6V power supply
• 32bit Arm® Cortex®-M0+ CPU, frequency up to 56MHz
• 1Kbyte instruction cache allowing 0-wait-state execution from flash memory
• Upto 64Kbyte single bank flash memory, proprietary code readout protection
• True random number generation, candidate for NIST SP 800-90B certification
• Candidate for Arm® PSA level 1 and SESIP level 3 certifications, 5 passive anti-tamper pins
• Oscillator frequency range from 4 to 48MHz
• I/O pin capacitance is 5pF typical
• Output rise and fall time is 9ns typ at (C = 50pF, 2.7V?VDDIOx?3.6V)
• Industrial temperature range from -40°C to 85°C, 48-pin UFQFPN package