The STMicroelectronics Mainstream microcontroller is based on high-performance Arm® Cortex®-M0+ 32-bit RISC core that operates at up to 64 MHz frequency. It incorporates a memory protection unit (MPU), high-speed embedded memories (8 Kbytes of SRAM and up to 64 Kbytes of Flash program memory with read, write protection), extensive range of system functions and enhanced I/Os. It is suitable for a wide range of applications in consumer, industrial and appliance domains.

Operating temperature range between -40°C to 85°C
Up to 64 Kbytes of Flash memory with protection
4 to 48 MHz crystal oscillator
32 kHz crystal oscillator with calibration
8 Kbytes of SRAM with HW parity check
Voltage range between 2.0 V to 3.6 V
Power-on/Power-down reset POR/PDR
Low-power modes - Sleep, Stop, Standby