The STM32F446xx 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 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 STM32F446xx devices incorporate high-speed embedded memories (Flash memory up to 512 Kbyte, up to 128 Kbyte 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.
Core: ARM® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Fl ash memory, frequency up to 180 MHz, MPU, 225 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP instructions
Memories
512 kB of Flash memory
128 KB of SRAM
Flexible external memory controller with up to 16-bit data bus: SRAM,PSRAM,SDRAM/LPSDR SDRAM, Flash NOR/NAND memories
Dual mode Quad SPI interface
LCD parallel interface, 8080/6800 modes
Clock, reset and supply management
1.7 V to 3.6 V application supply and I/Os
POR, PDR, PVD and BOR
4-to-26 MHz crystal oscillator
Internal 16 MHz factory-trimmed RC (1% accuracy)
32 kHz oscillator for RTC with calibration
Internal 32 kHz RC with calibration
Low power
Sleep, Stop and Standby modes
VBATsupply for RTC, 20×32 bit backup registers + optional 4 KB backup SRAM
3×12-bit, 2.4 MSPS ADC: up to 24 channels and 7.2 MSPS in triple interleaved mode
2×12-bit D/A converters
General-purpose DMA: 16-stream DMA controller with FIFOs and burst support
Up to 17 timers: 2x watchdog, 1x SysTick timer and up to twelve 16-bit and two 32-bit timers up to 180 MHz, each with up to 4 IC/OC/PWM or pulse counter
Debug mode
SWD & JTAG interfaces
Cortex®-M4 Trace Macrocell™
Up to 114 I/O ports with interrupt capability
Up to 111 fast I/Os up to 90 MHz
Up to 112 5 V-tolerant I/Os
Up to 20 communication interfaces
SPDIF-Rx
Up to 4 × I²C interfaces (SMBus/PMBus)
Up to 4 USARTs/2 UARTs (11.25 Mbit/s, ISO7816 interface, LIN, IrDA, modem control)
Up to 4 SPIs (45 Mbits/s), 3 with muxed I²S for audio class accuracy via internal audio PLL or external clock
2 x SAI (serial audio interface)
2 × CAN (2.0B Active)
SDIO interface
Consumer electronics control (CEC) I/F
Advanced connectivity
USB 2.0 full-speed device/host/OTG controller with on-chip PHY
USB 2.0 high-speed/full-speed device/host/OTG controller with dedicated DMA, on-chip full-speed PHY and ULPI
Dedicated USB power rail enabling on-chip PHYs operation throughout the entire MCU power supply range
8- to 14-bit parallel camera interface up to 54 Mbytes/s
CRC calculation unit
RTC: subsecond accuracy, hardware calendar
96-bit unique ID
