Core: Arm® 32-bit Cortex®-M0 CPU, frequency up to 48 MHz
Memories
16 to 256 Kbytes of Flash memory
4 to 32 Kbytes of SRAM with HW parity
CRC calculation unit
Reset and power management
Digital & I/Os supply: VDD = 2.4 V to 3.6 V
Analog supply: VDDA = VDD to 3.6 V
Power-on/Power down reset (POR/PDR)
Low power modes: Sleep, Stop, Standby
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 55 I/Os with 5V 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: 2.4 V to 3.6 V
Calendar RTC with alarm and periodic wakeup from Stop/Standby
11 timers
One 16-bit advanced-control timer for six-channel PWM output
Up to seven 16-bit timers, with up to four IC/OC, OCN, usable for IR control decoding
Independent and system watchdog timers
SysTick timer
Communication interfaces
Up to two I2C interfaces
Up to six USARTs supporting master synchronous SPI and modem control, one with auto baud rate detection
Up to two SPIs (18 Mbit/s) with 4 to 16 programmable bit frames
Serial wire debug (SWD)