Item specifics
Description
The STM32F412RGT6 is a Cortex-M4 dynamic efficiency MCU from STMicroelectronics in an LQFP-64 package. It runs at 100 MHz with FPU and ART Accelerator. It integrates 1 MB Flash, 256 KB SRAM, USB 2.0 OTG (FS), SDIO, 4 SPIs, 4 USARTs, 3 I2Cs, BAM batch acquisition mode, DFSDM (Digital Filter for Sigma-Delta Modulators), up to 13 timers (incl. 1 motor control PWM/deadtime), and a 12-bit ADC (16ch, 2.4MSPS). 50 I/Os, all 5 V-tolerant. Supply 1.7–3.6 V, -40–85 °C. Compared to the STM32F412RET6 (512 KB Flash, 256 KB SRAM), this model doubles the Flash to 1 MB, meeting the demands of larger firmware and complex protocol stacks. Compared to the STM32F411RET6 (100 MHz, 512 KB Flash, 128 KB SRAM), both Flash and SRAM are doubled, and the DFSDM digital filter is added, making it the memory flagship upgrade model in the LQFP-64 package. Compared to the STM32F103RET6 (Cortex-M3), it upgrades to a Cortex-M4 core with FPU, delivering an overall improvement in performance and connectivity.
Core: Arm Cortex-M4 100 MHz + FPU + ART Accelerator Memory: 1 MB Flash, 256 KB SRAM USB 2.0 OTG: FS, supports Device/Host/OTG SDIO: SD/MMC card interface support BAM: Batch Acquisition Mode for low-power batch sensor data reading DFSDM: 8-channel digital Sigma-Delta filter for connecting external modulators for high-precision ADC 12-bit ADC: 16 channels, 2.4 MSPS (up to 7.2 MSPS interleaved) Timers: 1× motor control PWM (deadtime/emergency stop), 7× 16-bit GP (incl. 2 quadrature encoders), 2× basic, 2× watchdogs, SysTick Communication Interfaces: 4×USART (ISO7816/LIN/IrDA), 4×SPI/I2S, 3×I2C (SMBus), USB OTG, SDIO I/Os: 50, all 5 V-tolerant Low Power: Sleep/Stop/Standby, VBAT backup RTC, BAM mode Package: LQFP-64 (10×10×1.4 mm)
High-Precision Sensor Nodes: DFSDM for connecting external Sigma-Delta ADCs/sensors Industrial: Sensor transmitters, data acquisition nodes, PLCs Motor Control: BLDC/PMSM FOC, fans, pumps Consumer: Game controllers, remote controls, drone flight controllers IoT Nodes USB OTG/SDIO Storage Applications
Cortex-M4 + FPU + ART Accelerator: 100 MHz high performance with DSP and floating-point support 1 MB Flash + 256 KB SRAM: Ample memory for large firmware and complex data processing DFSDM Digital Filter: Connects to external Sigma-Delta modulators for flexible high-precision measurement BAM Batch Acquisition Mode: Low-power batch sensor data reading, optimized battery life USB OTG + SDIO: USB communication and SD card storage LQFP-64 Package: 50 I/Os, rich resources for applications requiring more connectivity 12-bit ADC 2.4 MSPS Fast Conversion Mature STM32 Ecosystem: CubeIDE/CubeMX/HAL/LL
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FAQ:
What is the STM32F412RGT6 and how does it differ from the STM32F413RGT6?
The STM32F412RGT6 is a 100 MHz Cortex‑M4F microcontroller with 1 MB Flash, 256 KB SRAM, a DCMI camera interface, and a flexible memory controller (FMC) in a compact LQFP‑64 package. Compared to the STM32F413RGT6, it offers less SRAM (256 KB vs 320 KB) and the FMC does not support SDRAM (only NOR/PSRAM/NAND). Both share the same DCMI, USB, and communication peripherals. Choose the F412 when external SDRAM is not needed and the smaller SRAM suffices, allowing a more cost‑effective design while keeping the powerful camera and connectivity features.
Why put 1 MB Flash and a camera interface into a 64‑pin package? Is this combination really usable?
Absolutely. Many space‑constrained designs—portable medical instruments, compact barcode readers, miniature IoT cameras—need generous code storage but only a modest number of I/Os. The RGT6 packs 1 MB Flash, 256 KB SRAM, and a DCMI into a hand‑solderable LQFP‑64 body, enabling a powerful single‑chip solution with a camera input on a very small PCB. Careful pin allocation with STM32CubeMX ensures that the camera, USB, and several serial interfaces coexist without conflicts.
How does the STM32F412RGT6 compare to the classic STM32F407RGT6? Is it a worthwhile upgrade?
The STM32F407RGT6 also offers 1 MB Flash and an LQFP‑64 package, but the F412RGT6 brings significant improvements: SRAM increases from 192 KB to 256 KB, a DCMI camera interface is added, and the FMC now supports PSRAM. The CPU runs at a more power‑efficient 100 MHz. Existing F407 code can be migrated with minimal changes, giving you more memory, camera capability, and better low‑power performance in the same compact footprint.
Can the DCMI camera interface really work on a 64‑pin package? How many pins does it need?
Yes. The DCMI requires 8–14 data lines plus a few control signals. On the 64‑pin RGT6, you can allocate a reduced 8‑bit DCMI bus together with USB, CAN, and one or two serial ports without pin conflicts. STM32CubeMX helps you verify the exact pin assignment, and many real‑world designs successfully integrate a small camera module on this package.
Does the STM32F412RGT6 support SDRAM? What external memory options are available?
No, the F412 series does not include an SDRAM controller. Instead, the FMC supports parallel NOR Flash, PSRAM, and NAND Flash. On the 64‑pin package, you can connect a fast 8‑ or 16‑bit PSRAM (e.g., 8 MB) for frame buffers or data logging. This keeps power consumption and cost lower, aligning with the F412’s target applications.
Is 256 KB SRAM enough for camera frame buffering, and what resolutions can I handle?
256 KB is sufficient for line‑by‑line processing of VGA (640×480) frames or for a small frame buffer at QVGA (320×240). For larger buffers, stream the data into external PSRAM connected to the FMC. The 1 MB Flash comfortably stores the camera driver, image processing code, and a real‑time OS, so the overall system can be both compact and capable.
Does the STM32F412RGT6 support USB high‑speed, or only full‑speed?
It includes a full‑speed USB OTG controller with an integrated PHY, and a separate high‑speed controller that works with an external ULPI PHY. You can implement a USB Video Class (UVC) device or stream data from the camera to a PC over HS USB. Both modes can be used on the 64‑pin package with careful pin planning.
What low‑power modes does the STM32F412RGT6 offer, and how efficient is it?
The chip supports Sleep, Stop, and Standby modes. In Stop mode with the main regulator off and full SRAM retention, current drops to about 100 µA. It can wake up quickly on USB, CAN, or external interrupts, making it ideal for battery‑powered camera sensors and portable instruments that spend most of their time in low‑power states.
What development tools and evaluation boards are available for the STM32F412RGT6?
All major IDEs—free STM32CubeIDE, Keil MDK, and IAR EWARM—fully support the chip. While no dedicated 64‑pin Nucleo board exists for the exact F412RGT6, you can prototype firmware on a NUCLEO‑F413ZH (software‑compatible) or use the STM32F4 Discovery boards. When moving to the RGT6 target, simply adjust the linker script and pin configuration in CubeMX. The STM32CubeF4 package includes ready‑to‑run examples for DCMI, USB, and other peripherals.
What are the most typical applications for the STM32F412RGT6?
It is perfect for ultra‑compact camera modules, handheld barcode scanners, portable medical diagnostic tools, tiny USB‑connected cameras, and industrial sensor nodes that require a high‑resolution camera input but limited I/O. The unique combination of 1 MB Flash, 256 KB SRAM, a camera interface, and a small LQFP‑64 package makes it a standout choice for embedded products where space and imaging capability must go hand in hand.