Item specifics
Description
The STM32F207VCT6 is a Cortex-M3 advanced performance MCU from STMicroelectronics in an LQFP-100 package. It runs at 120 MHz with ART Accelerator for zero-wait Flash execution. Integrated 256 KB Flash, 128 KB SRAM, Ethernet 10/100 MAC (IEEE 1588 PTP hardware support, MII/RMII), USB 2.0 OTG (FS/HS), dual CAN 2.0B, SDIO, hardware crypto/HASH, 3×12-bit ADCs (16ch/2.4MSPS/triple sampling), 2×12-bit DACs, 16-stream DMA, up to 17 timers (incl. 2 motor control PWM/deadtime/emergency stop), and 15 communication interfaces (4×USART/2×UART/3×SPI/3×I2C/SDIO/USB/CAN). 82 I/Os (LQFP-100), all 5 V-tolerant. Supply 1.8–3.6 V, -40–85 °C, ECOPACK®2. Compared to the STM32F205VCT6 (256 KB Flash/96 KB SRAM), SRAM is upgraded to 128 KB, and Ethernet MAC (IEEE 1588 PTP) and camera interface (DCMI) are added, making this the communication-enhanced version of the F205 series. Compared to the STM32F107VCT6 (72 MHz Cortex-M3), core frequency is increased to 120 MHz, adding ART Accelerator, USB OTG HS, hardware crypto engine, more ADC/DAC channels and timers.
Core: Arm Cortex-M3 120 MHz, ART Accelerator, 1.25 DMIPS/MHz Memory: 256 KB Flash, 128 KB SRAM, CRC 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 Dual CAN 2.0B: 512 bytes dedicated SRAM, 11 filters SDIO + HW Crypto: AES 128/192/256, 3DES, HASH (MD5, SHA-1), RNG Camera Interface: 8–14-bit parallel DCMI, supports CMOS sensors 3×12-bit ADCs: 16 channels, 2.4 MSPS (7.2 MSPS interleaved), triple sample-and-hold 2×12-bit DACs: Buffered DMA: 16 streams, memory-to-memory, peripheral-to-memory Timers: Up to 17 (2× motor control PWM/deadtime/emergency stop, 10× GP/quadrature encoder, 2× basic, 2× watchdogs, SysTick) Communication Interfaces: 4×USART + 2×UART (ISO7816/LIN/IrDA), 3×SPI (30 Mbit/s), 3×I2C (SMBus), 2×I2S, SDIO, USB OTG, CAN 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, dual CAN nodes, industrial Ethernet gateways Precision Clock Sync: IEEE 1588 PTP network time synchronization, smart grid Image Capture: Simple camera monitoring, barcode scanning, industrial vision Dual-Motor FOC Control: 2 advanced-control timers USB HS Communication, Audio Devices Security Applications: IoT security, payment terminals Medical & Handheld Devices Video Intercom, HVAC
120 MHz + ART Accelerator: Zero-wait Flash execution, performance close to Cortex-M4, far surpassing standard Cortex-M3 Ethernet MAC + USB OTG HS/FS + Dual CAN + Crypto Engine: Comprehensive communication features, rare configuration 128 KB SRAM + 256 KB Flash: SRAM upgraded to 128 KB over F205VCT6 for more complex protocol stacks Camera Interface (DCMI): Supports CMOS sensors for image capture applications LQFP-100 Package: 82 I/Os with rich resources for multi-peripheral connection 3 ADCs (Triple Sampling) + 2 DACs: Comprehensive analog functions 17 Timers (incl. 2 Motor Control): Supports dual-motor FOC 15 Communication Interfaces: Rich resources Mature STM32 Ecosystem: CubeIDE/CubeMX/HAL/LL
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FAQ:
What is the STM32F207VCT6 and how does it differ from the STM32F207VET6?
The STM32F207VCT6 is a 120 MHz Arm Cortex‑M3 microcontroller with 256 KB Flash and 128 KB SRAM in an LQFP‑100 package. It includes a 10/100 Ethernet MAC, USB OTG FS/HS, dual CAN, and a flexible static memory controller (FSMC). The only difference from the VET6 is Flash size: the VCT6 provides 256 KB, while the VET6 doubles it to 512 KB. All other features—CPU speed, SRAM, peripherals, and pin‑out—are identical. Choose the VCT6 when your firmware fits within 256 KB and you want the most cost‑effective entry into the STM32F2 series, with full connectivity and zero analog compromises.
Is 256 KB Flash really enough for a complete Ethernet, USB, and CAN application?
Yes, for dedicated, well‑optimised designs. A lightweight RTOS, an LwIP TCP/IP stack, a USB device protocol, and a compact CANopen stack can be tightly packed into 256 KB, especially when using compiler optimizations. The 128 KB SRAM remains generous for communication buffers and real‑time data. If your code later outgrows this limit, the pin‑compatible STM32F207VET6 (512 KB) provides a direct drop‑in upgrade with no hardware changes.
How does the STM32F207VCT6 compare to the classic STM32F107 as an upgrade? What do I gain?
The STM32F107 is also an Ethernet‑enabled Cortex‑M3, but runs at only 72 MHz, with 256 KB Flash and just 64 KB SRAM. The F207VCT6 doubles the CPU speed and SRAM, adds a second CAN, a more capable FSMC, and a faster USB OTG controller. The LQFP‑100 package is often pin‑compatible, allowing a smooth hardware migration that dramatically improves network throughput and gives you far more RAM headroom for communication stacks.
Why choose the STM32F207VCT6 over the STM32F407VET6? What are the trade‑offs?
The STM32F407VET6 offers a 168 MHz Cortex‑M4 with FPU and DSP, plus a camera interface, but it costs more and has twice the Flash (512 KB). The F207VCT6 is a very attractive cost‑optimized alternative if your application does not need floating‑point math, DSP acceleration, or a camera, and your code fits in 256 KB. You still get the same LQFP‑100 footprint and identical Ethernet, USB, and CAN capabilities.
Can the STM32F207VCT6 really run Ethernet, USB, and both CAN ports at the same time on a 100‑pin package?
Yes, with careful pin planning. Using RMII for Ethernet (which uses fewer pins than MII) and an external ULPI PHY for USB HS if needed, you can allocate Ethernet, USB FS/HS, two CAN 2.0B ports, and a few UART/SPI/I2C interfaces without conflicts. STM32CubeMX helps you verify the exact pin‑multiplexing. This makes the VCT6 a powerful, compact communication hub even in its entry‑level Flash configuration.
How can I expand the memory beyond the 128 KB of internal SRAM?
The FSMC (Flexible Static Memory Controller) allows you to connect external parallel NOR Flash, PSRAM, or NAND Flash. It does not support SDRAM (that requires the STM32F407 series). On the 100‑pin package, the FSMC data bus is limited to 8‑ or 16‑bit width, but you can still add a fast PSRAM for data logging or additional buffers. The 256 KB internal Flash is usually enough for the application, so external parallel Flash is rarely required for code storage.
What low‑power modes does the STM32F207VCT6 support, and is it suitable for battery‑powered devices?
It supports Sleep, Stop, and Standby modes. In Stop mode with all 128 KB SRAM retained, the typical current is around 110 µA. The chip can wake up quickly on Ethernet, USB, or CAN activity. Its 120 MHz core can complete tasks faster and return to sleep, making it a good fit for battery‑powered industrial sensors and portable instruments that need periodic network communication.
Can the STM32F207VCT6 be used for USB high‑speed, or is it limited to full‑speed?
The chip includes a full‑speed USB OTG controller with an integrated PHY, and a separate high‑speed controller that requires an external ULPI PHY. You can implement USB HS devices or hosts, such as high‑speed data loggers or audio interfaces, by adding a ULPI transceiver. The 256 KB Flash and 128 KB SRAM comfortably host a USB stack and the application code.
How can I perform over‑the‑air (OTA) firmware updates with the 256 KB single‑bank Flash?
The 256 KB Flash can be logically partitioned into a bootloader and an active application. A typical bootloader reserves 16 KB, leaving 240 KB for the application. The 128 KB SRAM can temporarily buffer the new firmware image received via Ethernet, USB, or a wireless module. A CRC or signature check ensures a safe update, even without hardware dual‑bank Flash. For larger updates, an A/B scheme is possible if the application is compact enough.
What development tools and evaluation boards support the STM32F207VCT6?
All major IDEs—free STM32CubeIDE, Keil MDK, and IAR EWARM—fully support the chip. While there is no dedicated 100‑pin Nucleo board for this exact part, you can prototype on a NUCLEO‑F207ZG or STM3220G‑EVAL board (software‑compatible) and then migrate to the VCT6 by adjusting the linker script and pin‑out in CubeMX. The STM32CubeF2 firmware package provides HAL/LL drivers and ready‑to‑run examples for Ethernet, USB, CAN, and FSMC.