STMicroelectronics ARM Cortex M4, STM32 Microcontroller, 170MHz, 256 Kbyte Flash, 64-Pin LQFP

The STMicroelectronics devices are based on the high-performance Arm Cortex M4 32-bit RISC core. They operate at a frequency of up to 170 MHz The Cortex-M4 core features a single-precision floating-point unit (FPU), which supports all the Arm single-precision data-processing instructions and all the data types. It also implements a full set of DSP (digital signal processing) instructions and a memory protection unit (MPU) which enhances the application’s security. These devices embed high-speed memories (up to 512 Kbytes of Flash memory, and 128 Kbytes of SRAM), a flexible external memory controller (FSMC) for static memories (for devices with packages of 100 pins and more), a Quad-SPI Flash memory interface, 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.

Calendar RTC with alarm, periodic wakeup from stop/standby
True random number generator (RNG)
CRC calculation unit and 96-bit unique ID
Development support serial wire debug (SWD), JTAG, Embedded Trace Microcell