Item specifics
Description
The STM32F427VIT6 is a Cortex-M4 high-performance MCU from STMicroelectronics in an LQFP-100 package. It runs at 180 MHz with FPU and ART Accelerator. It integrates 2 MB Flash, 256 KB SRAM (incl. 64 KB CCM), Ethernet 10/100 MAC (IEEE 1588 PTP, MII/RMII), USB 2.0 OTG (FS/HS, FS on-chip PHY), camera interface (DCMI), hardware crypto/HASH/true random number processor, dual CAN 2.0B, 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. Compared to the STM32F427VGT6 (1 MB Flash, 256 KB SRAM), this model doubles the Flash to 2 MB, meeting the demands of larger firmware and complex protocol stacks, making it the memory flagship in this series within the LQFP-100 package. Compared to the STM32F407VGT6 (168 MHz, 192 KB SRAM), this model increases the core frequency to 180 MHz, increases SRAM to 256 KB, adds a second CAN interface and a true random number generator, providing comprehensive enhancements in performance and security.
Core: Arm Cortex-M4 180 MHz + FPU + ART Accelerator Memory: 2 MB Flash, 256 KB SRAM (incl. 64 KB CCM) Ethernet MAC: 10/100 Mbit/s, IEEE 1588 PTP hardware support, MII/RMII 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), True RNG Dual CAN 2.0B: Supports dual industrial bus communication 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, Ethernet I/Os: 82, all 5 V-tolerant Low Power: Sleep/Stop/Standby, VBAT backup RTC Package: LQFP-100 (14×14×1.4 mm)
Industrial: PLCs, inverters, precision motor drives, industrial Ethernet gateways Motor Control: Dual-motor FOC, servo drives, pumps Image Capture: Simple camera monitoring, barcode scanning, industrial vision Network Communication: Ethernet control nodes, IoT gateways Security Applications: IoT security, payment terminals, data integrity verification Portable Medical Devices
180 MHz Cortex-M4 + FPU: Increased core frequency for complex DSP and floating-point operations 2 MB Flash + 256 KB SRAM: Large memory capacity for large firmware and complex algorithms Ethernet + DCMI + Crypto + Dual CAN: Network communication, image capture, data security, and dual industrial bus in a 100-pin package Hardware Crypto Engine + RNG: AES/3DES/HASH/true random number for data security and integrity 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:
What is the STM32F427VIT6 and how does it differ from the STM32F427ZIT6?
The STM32F427VIT6 is a 180 MHz Cortex‑M4 microcontroller with 2 MB Flash, 256 KB SRAM, and a rich set of industrial communication peripherals. It is housed in an LQFP‑100 package, whereas the ZIT6 uses an LQFP‑144. Both share identical core speed, memory, and peripheral set, but the VIT6 is limited to 82 I/Os compared to 114 on the ZIT6. Choose the VIT6 when you need the full 2 MB of code storage but can keep your I/O count within 82 pins, saving PCB space and simplifying layout.
Why would I want a 2 MB Flash MCU in a small LQFP‑100 package? Is that combination practical?
Absolutely. Many complex industrial devices—multi‑protocol gateways, motion controllers, and data loggers—have large firmware requirements (RTOS, TCP/IP, CANopen, FAT file system) but only need a moderate number of I/Os. The VIT6 packs 2 MB of Flash for all that code into a compact 100‑pin body that is easy to hand‑solder and route on a small PCB, giving you the best of both worlds: massive code space without a large footprint.
Can the STM32F427VIT6 run Ethernet, USB high‑speed, and dual CAN simultaneously with only 82 I/Os?
Yes, with careful planning. Using an RMII Ethernet PHY (reduced pin count) and the ULPI interface for USB HS, you can configure one Ethernet, one USB HS, two CAN 2.0B, plus several UART, SPI, and I2C interfaces simultaneously without pin conflicts. The key is to assign signals wisely; STM32CubeMX helps you verify the exact pin‑multiplexing before designing the schematic.
How does the STM32F427VIT6 compare with the STM32F407VGT6? Is it a drop‑in upgrade?
In many cases, yes. The STM32F407VGT6 also uses LQFP‑100 and shares a very similar pinout. Upgrading to the F427VIT6 gives you double the Flash (2 MB vs 1 MB), larger SRAM (256 KB vs 192 KB), a higher clock speed (180 MHz vs 168 MHz), and more communication peripherals. Existing HAL‑based code can be reused with minimal changes, providing an immediate performance and storage boost.
Does the STM32F427VIT6 have a TFT‑LCD controller or camera interface? What if I need a display?
No. Like all STM32F427 models, the VIT6 does not include an LCD‑TFT controller, Chrom‑ART accelerator, or DCMI camera interface. It is a headless controller, optimised for industrial communication and control. If you need a graphical display, you can still connect a small SPI or parallel LCD via GPIO, or move to the STM32F429 series which has the dedicated graphics hardware.
How is the 256 KB SRAM organised, and what is the CCM memory used for?
The SRAM consists of 112 KB of general‑purpose SRAM, 64 KB of core‑coupled memory (CCM), 64 KB of additional system SRAM, and 16 KB of high‑speed SRAM (ITCM). The CCM is directly connected to the CPU data bus, providing zero‑wait‑state access for critical real‑time data and the stack, but it cannot be accessed by DMA. Use the general‑purpose and system SRAM for DMA‑driven buffers.
What is the maximum number of I/O pins on the STM32F427VIT6, and how many UART/SPI/I2C ports can I use?
The LQFP‑100 package provides up to 82 general‑purpose I/Os. The chip offers up to 6 USART/UART, 4 SPI/I2S, and 3 I2C interfaces. You can typically run 3‑4 UARTs, 2 SPIs, and 2 I2Cs together with Ethernet and USB, as long as you avoid pin‑function overlaps. STM32CubeMX is invaluable for checking the exact pin allocation.
Is 2 MB of Flash overkill for a 100‑pin MCU? What applications really benefit?
Not at all. Large Flash is essential for applications that must store extensive firmware, configuration data, or even a small embedded file system. Typical examples include industrial Ethernet gateways with web servers, Modbus/CAN‑to‑cloud converters, and motor drives that need a complete field‑oriented control library plus a communication stack. The VIT6 delivers this capacity in a compact, easy‑to‑assemble package.
Can I perform over‑the‑air (OTA) firmware updates with the single‑bank 2 MB Flash?
Yes. The 2 MB Flash can be logically partitioned into a bootloader, an active application area, and a download buffer, or into two application slots for an A/B update scheme. The generous SRAM can temporarily hold the new firmware image received via Ethernet, USB, or a wireless module before it is verified and written to Flash. This ensures a safe update process even without hardware dual‑bank Flash.
What development tools support the STM32F427VIT6? Is there a matching Nucleo board?
All major IDEs—free STM32CubeIDE, Keil MDK, and IAR EWARM—fully support the chip. While there is no dedicated Nucleo‑64 or Nucleo‑144 with this exact 100‑pin F427, the NUCLEO‑F429ZI (144‑pin) is software‑compatible and can be used for early firmware development. You only need to adjust the linker script and pin assignments in CubeMX when migrating to the VIT6 target.