The STM32F405xx and STM32F407xx family is based on the high-performance ARM Cortex -M4 32-bit RISC core operating at a frequency of up to 168 MHz. The Cortex-M4 core features a Floating point unit (FPU) single precision which supports all ARM single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security.The STM32F405xx and STM32F407xx family incorporates high-speed embedded memories (Flash memory up to 1 Mbyte, up to 192 Kbytes of 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.All devices offer three 12-bit ADCs, two DACs, a low-power RTC, twelve general-purpose 16-bit timers including two PWM timers for motor control, two general-purpose 32-bit timers. a true random number generator (RNG). They also feature standard and advanced communication interfaces.Core: ARM® 32-bit Cortex® -M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Flash memory, frequency up to 168 MHz, memory protection unit, 210 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP instructionsMemoriesUp to 1 Mbyte of Flash memoryUp to 192+4 Kbytes of SRAM including 64-Kbyte of CCM (core coupled memory) data RAMFlexible static memory controller supporting Compact Flash, SRAM, PSRAM, NOR and NAND memoriesLCD parallel interface, 8080/6800 modesClock, reset and supply management1.8 V to 3.6 V application supply and I/OsPOR, PDR, PVD and BOR4-to-26 MHz crystal oscillatorInternal 16 MHz factory-trimmed RC (1% accuracy)32 kHz oscillator for RTC with calibrationInternal 32 kHz RC with calibrationSleep, Stop and Standby modesVBATsupply for RTC, 20×32 bit backup registers + optional 4