STM32F405VGT6 ST Mainstream Arm Cortex-M4 High-Performance 32-bit MCU 1MB Flash 168MHz FPU USB OTG SDIO DCMI LQFP-100

STM32F405VGT6 Product Overview

The STM32F405VGT6 is a Cortex-M4 high-performance MCU from STMicroelectronics in an LQFP-100 package. It runs at 168 MHz with FPU and ART Accelerator. It integrates 1 MB Flash, 192 KB SRAM, USB 2.0 OTG (FS/HS), SDIO, camera interface (DCMI), hardware crypto/HASH processor, two 12-bit DACs, three 12-bit ADCs (24ch, up to 7.2 MSPS in triple-interleaved mode), up to 17 timers (incl. 2 advanced motor control PWM/deadtime). 82 I/Os, all 5 V-tolerant. Supply 1.8–3.6 V, -40–85 °C. Core specifications are identical to the STM32F405RGT6 (LQFP-64, 51 I/Os), with the package upgraded to LQFP-100, doubling I/O resources and providing more ADC channels, making it ideal for complex applications requiring numerous I/Os and multi-channel analog front-ends. Compared to the STM32F401RET6 (84 MHz Cortex-M4), it doubles the core frequency, significantly upgrades memory and peripherals, and adds advanced features such as DCMI, crypto engine, and dual DACs.

STM32F405VGT6 Core Features

Core: Arm Cortex-M4 168 MHz + FPU + ART Accelerator Memory: 1 MB Flash, 192 KB SRAM USB 2.0 OTG: FS + HS, FS on-chip PHY, HS requires external ULPI SDIO + HW Crypto: SD/MMC interface; AES 128/192/256, 3DES, HASH (MD5, SHA-1), RNG Camera Interface: 8–14-bit parallel DCMI 3×12-bit ADCs: 24 channels, 2.4 MSPS (up to 7.2 MSPS in triple-interleaved mode) 2×12-bit DACs: Buffered output Timers: Up to 17 (2× motor control PWM/deadtime/emergency stop, 12× 16-bit GP/quadrature encoder, 2× basic, 2× watchdogs, SysTick) Communication Interfaces: 4×USART + 2×UART (ISO7816/LIN/IrDA), 3×SPI (30 Mbit/s), 2×I2S, 3×I2C (SMBus), USB OTG, SDIO I/Os: 82, all 5 V-tolerant Low Power: Sleep/Stop/Standby, VBAT backup RTC Package: LQFP-100 (14×14×1.4 mm)

STM32F405VGT6 Applications

Industrial: PLCs, inverters, precision motor drives Motor Control: Dual-motor FOC, servo drives, pumps Image Capture: Simple camera monitoring, barcode scanning, industrial vision Consumer: Drone flight controllers, game controllers, high-end remote controls Security Applications: IoT security, payment terminals Portable Medical Devices

STM32F405VGT6 Key Advantages

168 MHz Cortex-M4 + FPU: Strongest performance in this series for complex DSP and floating-point operations 192 KB SRAM + 1 MB Flash: Ample memory for large firmware and complex algorithms LQFP-100 Package: 82 I/Os with rich resources, up to 24 ADC channels, ideal for multi-peripheral connectivity DCMI Camera Interface: Supports CMOS sensors for image capture and vision applications Hardware Crypto Engine: AES/3DES/HASH/RNG for data security Dual DACs + 3 ADCs: Comprehensive analog functions with multi-channel synchronous acquisition 17 Timers (incl. 2 Motor Control): Supports dual-motor FOC Mature STM32 Ecosystem: CubeIDE/CubeMX/HAL/LL

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FAQ:

1. What is the STM32F405VGT6 and how does it differ from the STM32F407VGT6?
   The STM32F405VGT6 is a 168 MHz Arm Cortex‑M4F microcontroller with 1 MB Flash, 192 KB SRAM, USB OTG HS/FS, dual CAN, and an FSMC external memory controller, all in an LQFP‑100 package. It lacks the Ethernet MAC and the DCMI camera interface found on the STM32F407VGT6. This makes the F405VGT6 a cost‑optimised choice for applications that need the full Cortex‑M4 processing power and generous I/O, but do not require wired networking or a parallel camera.

2. How does the STM32F405VGT6 compare with the STM32F405ZGT6? When should I pick the 100‑pin version?
   Both share the same core, memory, and peripherals (no Ethernet, no camera). The only difference is the package: the VGT6 is an LQFP‑100 with up to 82 I/Os, while the ZGT6 is an LQFP‑144 with up to 114 I/Os. Choose the VGT6 when board space is tight and 82 I/Os are enough for your design. The ZGT6 provides more I/Os for additional serial ports, a wider FSMC data bus, or easier routing when many peripherals are used simultaneously.

3. Is 1 MB Flash and 192 KB SRAM enough for a complex motor control or USB application?
   Absolutely. 1 MB Flash comfortably holds a real‑time OS, motor‑control libraries (FOC, digital PFC), a USB device/host stack, and application logic. The 192 KB SRAM is sufficient for real‑time control loops, communication buffers, and moderate data logging. Many production‑proven motor drives, USB instruments, and industrial gateways use this exact memory configuration.

4. Can the STM32F405VGT6 drive a TFT display or a camera? What are my options for adding these features?
   The F405VGT6 has no built‑in TFT‑LCD controller or DCMI camera interface. However, you can connect small SPI TFT displays directly to the SPI ports, or use a parallel display with GPIO bit‑banging. For camera input, an external camera module with an integrated FIFO can be connected to the FSMC. If you need native RGB TFT or a parallel camera interface, the STM32F407VGT6 or F429 series is more suitable.

5. What external memory does the STM32F405VGT6 support? Can I add SDRAM?
   The FSMC (Flexible Static Memory Controller) on the STM32F405 supports NOR Flash, PSRAM, and NAND Flash, but **does not** support SDRAM. For SDRAM, you would need an STM32F407 or later. On the 100‑pin package, you can connect a fast 8‑ or 16‑bit PSRAM for additional data buffering, or use the SDIO interface to store data on an SD card. The 192 KB internal SRAM is sufficient for many real‑time control tasks.

6. How does the STM32F405VGT6 compare with the STM32F415? Should I pick the F405?
   The STM32F415 adds a hardware cryptographic accelerator (AES, DES, 3DES, hash) to the same core and memory configuration. Choose the F405VGT6 when you do not need hardware crypto and want the most cost‑effective version of the high‑performance F4 core with 1 MB Flash and a compact 100‑pin package. If your application requires secure boot or TLS/SSL acceleration, the F415 is the better match.

7. Can I use the STM32F405VGT6 for USB high‑speed applications? Is an external PHY required?
   Yes, the chip includes a full‑speed USB OTG with an integrated PHY, and a separate high‑speed controller that works with an external ULPI PHY. You can implement USB HS devices or hosts, such as high‑speed data loggers, audio interfaces, or virtual COM ports. The 1 MB Flash and 192 KB SRAM comfortably host a USB stack and application code.

8. How can I perform over‑the‑air (OTA) firmware updates with the STM32F405VGT6's 1 MB single‑bank Flash?
   The 1 MB Flash can be logically partitioned into a bootloader, an active application, and a download buffer, or split into two 512 KB slots for an A/B update scheme. The 192 KB SRAM can temporarily hold the new firmware image during reception via USB, UART, or an external SPI‑to‑Wi‑Fi module. A signature check ensures a safe update without hardware dual‑bank Flash.

9. What low‑power modes does the STM32F405VGT6 support, and can it be used in battery‑powered designs?
   It supports Sleep, Stop, and Standby modes. In Stop mode with full SRAM retention, typical current is about 110 µA. The chip can wake up quickly on USB, CAN, or external interrupts. Its FPU and DSP capabilities let you complete processing tasks faster and return to sleep sooner, making it suitable for battery‑powered industrial sensors and portable instruments.

10. What are the most typical applications for the STM32F405VGT6, given its lack of Ethernet and camera?
    It excels in compact motor drives, digital power converters, USB‑connected instruments, multi‑axis sensor hubs, and industrial data loggers that communicate via CAN, RS‑485, or USB. The 1 MB Flash, generous SRAM, and hand‑solderable LQFP‑100 package provide all the I/O needed for complex real‑time control without the overhead of unused networking hardware.