The STMicroelectronics STM32F20x family is based on the high-performance Arm® Cortex®-M3 32-bit RISC core operating at a frequency of up to 120 MHz The family incorporates high-speed embedded memories (Flash memory up to 1 Mbyte, up to 128 Kbytes of system SRAM), up to 4 Kbytes of backup SRAM, and an extensive range of enhanced I/Os and peripherals connected to two APB buses, three AHB buses and a 32-bit multi-AHB bus matrix. The devices also feature an adaptive real-time memory accelerator (ART Accelerator™) that allows to achieve a performance equivalent to 0 wait state program execution from Flash memory at a CPU frequency up to 120 MHz

Up to 1 Mbyte of Flash memory
512 bytes of OTP memory
Up to 128 + 4 Kbytes of SRAM
Flexible static memory controller that supports Compact Flash, SRAM, PSRAM, NOR and NAND memories
LCD parallel interface, 8080/6800 modes
Clock, reset and supply management
From 1.8 to 3.6 V application supply + I/Os
POR, PDR, PVD and BOR
4 to 26 MHz crystal oscillator
Internal 16 MHz factory-trimmed RC
32 kHz oscillator for RTC with calibration
Internal 32 kHz RC with calibration