STM32F446 Microcontrollers: Circuit, Pinout, and Datasheet

The STM32F446 devices are built around the high-performance Arm® Cortex®-M4 32-bit RISC processor, which runs at up to 180 MHz. All Arm® single-precision data-processing instructions and data formats are supported by the Cortex-M4 core's floating-point unit (FPU) single precision. It also includes a memory protection unit (MPU) to improve program security and a full set of DSP commands.

High-speed embedded memories (Flash memory up to 512 Kbytes, 128 Kbytes of SRAM), up to 4 Kbytes of backup SRAM, and a comprehensive range of upgraded I/Os and peripherals are all included in the STM32F446 devices, which are coupled to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix.

Three 12-bit ADCs, two DACs, a low-power RTC, twelve general-purpose 16-bit timers, two PWM timers for motor control, and two general-purpose 32-bit timers are available on all devices.

Footprint

3D Model

• 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 180 MHz, MPU, 225 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP instructions

• Memories

– 512 Kbytes of Flash memory

– 128 Kbytes of SRAM

– Flexible external memory controller with up to 16-bit data bus: SRAM, PSRAM, SDRAM/LPSDR SDRAM, NOR/NAND Flash memories

– Dual-mode QuadSPI 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

– VBAT supply for RTC, 20×32 bit backup registers plus 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 four IC/OC/PWM or pulse counter

• Debug mode

– SWD and 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 four USARTs and two UARTs (11.25 Mbit/s, ISO7816 interface, LIN, IrDA, modem control)

– Up to four SPIs (45 Mbits/s), three 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

• Industry

• Technology

• Internet-of-Things (IoT)

• Extensive Clock Gating

• Flexible Sleep Mode

• Motor Drive and Application Control

• Medical Equipment

• Industrial Applications: PLC, Inverters, Circuit Breakers

• Printers, and Scanners

• Alarm Systems, Video Intercom, and HVAC

• Home Audio Appliances

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