STMicroelectronics STM32G031F4P6, 32bit ARM Cortex M0+ Microcontroller, STM32G0, 64MHz, 16 kB Flash, 20-Pin TSSOP

Core: Arm® 32-bit Cortex®-M0+ CPU, frequency up to 64 MHz
-40°C to 85°C/125°C operating temperature Memories
Up to 64 Kbytes of Flash memory
8 Kbytes of SRAM with HW parity check CRC calculation unit Reset and power management
Voltage range: 1.7 V to 3.6 V
Power-on/Power-down reset (POR/PDR)
Programmable Brownout reset (BOR)
Programmable voltage detector (PVD)
Low-power modes: Sleep, Stop, Standby, Shutdown
–VBAT supply for RTC and backup registers Clock management
4 to 48 MHz crystal oscillator
32 kHz crystal oscillator with calibration
Internal 16 MHz RC with PLL option (±1 %)
Internal 32 kHz RC oscillator (±5 %) Up to 44 fast I/Os
All mappable on external interrupt vectors
Multiple 5 V-tolerant I/Os
5-channel DMA controller with flexible mapping
12-bit, 0.4 μs ADC (up to 16 ext. channels)
Up to 16-bit with hardware oversampling
Conversion range: 0 to 3.6V 11 timers (one 128 MHz capable): 16-bit for advanced motor control, one 32-bit and four 16-bit general-purpose, two low-power 16-bit, two watchdogs, SysTick timer Calendar RTC with alarm and periodic wakeup from Stop/Standby/Shutdown Communication interfaces
–Two I2C-bus interfaces supporting Fast-mode Plus (1 Mbit/s) with extra current
sink, one supporting SMBus/PMBus and wakeup from Stop mode
Two USARTs with master/slave synchronous SPI, LIN, IrDA capability, auto baud rate detection and wakeup feature
One low-power UART
Two SPIs (32 Mbit/s) with 4- to 16-bit programmable bitframe, one multiplexed
with I2S interface
Development support: serial wire debug (SWD)
96-bit unique ID