The STM32F031x microcontrollers incorporate the high-performance ARM Cortex-M0 32-bit RISC core operating at a 48 MHz maximum frequency, high-speed embedded memories (up to 32 Kbytes of Flash memory and up to 4 Kbytes of SRAM), and an extensive range of enhanced peripherals and I/Os. All devices offer standard communication interfaces (one I²C, one SPI, one I²S, and one USART), one 12-bit ADC, up to five general-purpose 16-bit timers, a 32-bit timer and an advanced-control PWM timer.The STM32F031x microcontrollers operate in the -40 to +85 °C and -40 to +105 °C temperature ranges, from a 2.0 to 3.6 V power supply. A comprehensive set of power-saving modes allows the design of low-power applications.The STM32F031x microcontrollers include devices in four different packages ranging from 20 pins to 48 pins. Depending on the device chosen, different sets of peripherals are included. The description below provides an overview of the complete range of STM32F031x peripherals proposed.These features make the STM32F031x microcontrollers suitable for a wide range of applications such as application control and user interfaces, handheld equipment, A/V receivers and digital TV, PC peripherals, gaming and GPS platforms, industrial applications, PLCs, inverters, printers, scanners, alarm systems, video intercoms, and HVACs.
Core: ARM® 32-bit Cortex™-M0 CPU, frequency up to 48 MHz
Memories
16 to 32 Kbytes of Flash memory
4 Kbytes of SRAM with HW parity checking
CRC calculation unit
Reset and supply management
Voltage range: 2.0 to 3.6 V
Power-on/Power-down reset (POR/PDR)
Programmable voltage detector (PVD)
Low power modes: Sleep, Stop and Standby
VBATsupply 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 39 fast I/Os
All mappable on external interrupt vectors
Up to 25 I/Os with 5 V tolerant capability
5-channel DMA controller
1 × 12-bit, 1.0 µs ADC (up to 10 channels)
Conversion range: 0 to 3.6V
Separate analog supply from 2.4 up to 3.6 V
Up to 9 timers
1 x 16-bit 7-channel advanced-control timer for 6 channels PWM output, with deadtime generation and emergency stop
1 x 32-bit and 1 x 16-bit timer, with up to 4 IC/OC, usable for IR control decoding
1 x 16-bit timer, with 2 IC/OC, 1 OCN, deadtime generation and emergency stop
1 x 16-bit timer, with IC/OC and OCN, deadtime generation, emergency stop and modulator gate for IR control
1 x 16-bit timer with 1 IC/OC
Independent and system watchdog timers
SysTick timer: 24-bit downcounter
Calendar RTC with alarm and periodic wakeup from Stop/Standby
Communication interfaces
1 x I²C interface; supporting Fast Mode Plus (1 Mbit/s) with 20 mA current sink, SMBus/PMBus, and wakeup from STOP
1 x USART supporting master synchronous SPI and modem control; one with ISO7816 interface, LIN, IrDA capability auto baud rate detection and wakeup feature
1 x SPI (18 Mbit/s) with 4 to 16 programmable bit frames, with I²S interface multiplexed
Serial wire debug (SWD)
96-bit unique ID
Extended temperature range: -40 to +105°C
All packages ECOPACK® 2
