The STM32F427xx and STM32F429xx devices are based on the high-performance ARM? Cortex?-M4 32-bit RISC core operating at a frequency of up to 180 MHz. The Cortex-M4 core features a Floating point unit （FPU） single precision which supports all ARM? singleprecision 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 STM32F427xx and STM32F429xx devices incorporate high-speed embedded memories （Flash memory up to 2 Mbyte， up to 256 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， two 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. They also feature standard and advanced communication interfaces.