The MikroElektronika Arm cortex -M3 32-bit RISC core operating at a frequency of up to 120 MHz It has high-speed embedded to 1 Mbytes of flash memory, 128 Kbytes of SRAM, and an extensive range of enhanced I/Os and peripheral connected to two APB bus

512 bytes of OTP memory
Low-power mode
4 to 26 MHz crystal oscillator