STMicroelectronics STM32446E-EVAL

Overview

STM32446E-EVAL from STMicroelectronics is an evaluation board built around the STM32F446ZET6 ARM® Cortex®-M4 microcontroller with FPU, featuring 512KB Flash, 128KB SRAM, dual CAN 2.0A/B interfaces, SPDIF optical input, and a 3.2" 240×320 TFT LCD with resistive touchscreen - used for rapid prototyping of motor control, audio processing, and industrial HMI applications.

For engineers reviewing the STM32446E-EVAL datasheet, STM32446E-EVAL pinout, STM32446E-EVAL application, or STM32446E-EVAL equivalent, this board supports full peripheral validation including SAI audio DAC, camera interface (2048×1536), USB OTG HS/FS, JTAG/SWD+ETM trace debug, and QuadSPI Flash expansion.

Technical Context

The board implements the full peripheral suite of the STM32F446ZET6 MCU, including two SAI interfaces for stereo audio I/O, three 12-bit ADCs and two 12-bit DACs for analog signal acquisition and playback, and dual CAN controllers compliant with ISO 11898-1 for industrial networking.

It integrates ST-LINK/V2-1 for in-circuit debugging and programming, supports multiple power sources (5 V via power jack, USB FS/HS, ST-LINK, or daughter board), and provides extension headers for custom daughter boards targeting FMC, memory, or application-specific I/O.

Key Specifications

Availability

STM32446E-EVAL is available at Aetrix Electronics and suitable for industrial HMI development, audio codec evaluation, motor control algorithm validation, and embedded vision prototyping requiring stable component supply and long-term design support.

Supply support for STM32446E-EVAL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for automotive, industrial, and consumer markets.

This board belongs to ST's STM32 Evaluation Board product line, engineered to accelerate firmware development, peripheral interoperability testing, and real-world system integration for Cortex-M4-based applications.

FAQ

Does STM32446E-EVAL support external SDRAM expansion beyond the onboard 4M×16-bit chip?

Yes - the board exposes the full FMC (Flexible Memory Controller) bus via dedicated expansion headers, enabling connection of additional SDRAM, NOR/NAND flash, or SRAM devices. The onboard 4M×16-bit SDRAM is directly mapped to FMC Bank1, and pinout matches STM32F446ZE datasheet timing requirements for 16-bit data width and address multiplexing.

Can the SPDIF optical input be used simultaneously with the SAI audio DAC outputs?

Yes - the SPDIF receiver and SAI transmitter operate on independent clock domains and share no hardware resource conflict. The STM32F446ZET6 supports concurrent SPDIF input capture and SAI-driven stereo DAC playback, validated in ST's official audio demonstration firmware using separate DMA channels and configurable audio clocks.

Is the camera interface compatible with OV5640 or similar 5MP sensors?

No - the onboard camera connector is designed for ST's VE9600 module (2048×1536 resolution) and uses a parallel 8-/10-/12-bit DVP interface with specific timing and control signals (PCLK, HSYNC, VSYNC, XCLK). While OV5640 supports DVP, its register map, power sequencing, and clocking differ and require custom driver adaptation beyond the provided ST HAL examples.

What debug capabilities does the embedded ST-LINK/V2-1 provide beyond basic programming?

The ST-LINK/V2-1 on board supports full SWD/JTAG debugging, real-time variable watch, instruction trace via ETM (Embedded Trace Macrocell), and SWV (Serial Wire Viewer) for printf-style logging. It delivers up to 4 KB of trace buffer depth and supports breakpoints, step-through execution, and memory inspection directly from STM32CubeIDE or Keil MDK without external probes.