Item specifics
Description
STM32H725ZGT6 Product Overview
STM32H725ZGT6 is a Cortex-M7 MCU at 550 MHz with double-precision FPU, LQFP-144. 1 MB dual-bank Flash, 564 KB SRAM, USB OTG HS/FS (on-chip HS PHY), Ethernet MAC, CAN FD, camera interface (DCMI), dual Quad SPI, FMC (SDRAM), three 16-bit ADCs (5 Msps, 24 ch), two 12-bit DACs, two comparators, two op-amps, advanced motor control timers, GP/LP timers, RTC, 8×USART/UART, 5×SPI/I2S, 4×I2C, SDIO, SAI, SPDIF-Rx/Tx. 114 x 5 V-tolerant I/Os. 1.71–3.6 V, -40–85 °C. Compared to the H723 series, adds a DCMI camera interface and SPDIF-Tx audio output, delivering more comprehensive multimedia support for high-performance real-time control, image acquisition, and industrial networking.
STM32H725ZGT6 Core Features
Core: Cortex-M7 550 MHz, DPFPU + L1 cache (16 KB I-cache + 16 KB D-cache)
Memory: 1 MB Dual-Bank Flash, 564 KB SRAM (incl. 128 KB DTCM)
Connectivity & Imaging: Ethernet MAC, USB OTG HS/FS (on-chip HS PHY), CAN FD, DCMI, SDIO, SAI, SPDIF-Rx/Tx, 8×USART/UART, 5×SPI/I2S, 4×I2C
Analog: 3×16-bit ADCs (5 Msps, 24 ch), 2×12-bit DACs, 2×Comparators, 2×Op-Amps
Motor Control: 2×Advanced Timers (PWM/Deadtime/Brake), multiple GP/LP timers
Memory Expansion: FMC (SDRAM/PSRAM/NOR/NAND), Dual Quad SPI
I/Os: 114 (5 V-tolerant)
Package: LQFP-144
Temperature Range: -40°C to 85°C
STM32H725ZGT6 Applications
Industrial Control: Real-time controllers, PLCs, servo drives, industrial Ethernet gateways
Image Capture & Processing: Camera interfaces, industrial vision, barcode scanning
Audio & Consumer: Digital audio equipment, advanced consumer electronics
Motor Control: High-precision FOC, multi-axis servo control
High-Speed Communication: Ethernet/CAN FD/USB HS interface conversion and bridging
STM32H725ZGT6 Key Advantages
550 MHz Cortex-M7 + DPFPU: Ultimate real-time processing and floating-point performance
1 MB Dual-Bank Flash + DCMI + SPDIF-Tx: Large storage with image capture and audio transmit for enhanced multimedia capabilities
On-Chip USB HS PHY: Eliminates external HS PHY, simplifying design and BOM
Ethernet + CAN FD + Rich Connectivity: Single-chip for industrial networking and real-time communication
114 I/Os + 24 ADC Channels: Rich pin and analog acquisition resources for complex system integration
Dual Quad SPI + FMC: Flexible external memory expansion
1.71–3.6 V Wide Supply: Adaptable to various power scenarios
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FAQ
1. The Cortex‑M7 core on the STM32H725ZGT6 runs at up to 550 MHz. What advantages does this offer over the 480 MHz STM32H743?
The 550 MHz Cortex‑M7 delivers approximately 1178 DMIPS and 2778 CoreMark—a roughly 15% performance uplift over the 480 MHz H743. With the same double‑precision FPU, DSP extensions, 1 MB dual‑bank Flash, and 564 KB SRAM in an LQFP‑144 package, it is particularly well‑suited for motor control, digital power, and industrial communication applications that demand the highest levels of deterministic real‑time computation.
2. How is the 564 KB SRAM organized, and how does it benefit hard real‑time tasks?
The SRAM is carefully partitioned into 128 KB DTCM (Data Tightly Coupled Memory), 64 KB ITCM (Instruction Tightly Coupled Memory), 256 KB AXI SRAM, and 128 KB low‑power SRAM (retainable in Stop mode). DTCM and ITCM provide zero‑wait‑state CPU access for the lowest and most deterministic interrupt and control‑loop latency. The multi‑bank architecture allows DMA and the CPU to access different regions simultaneously without blocking, significantly boosting throughput when concurrently handling Ethernet, LCD refresh, and high‑speed ADC acquisition.
3. Does the 1 MB dual‑bank Flash support OTA updates? How can update safety be ensured?
Yes. The dual‑bank architecture allows code execution from one bank while the other is being erased and programmed. Once a new firmware image is downloaded to the alternate bank and verified, a simple boot‑address switch completes the update. If a power loss or verification failure occurs, the system automatically rolls back to the original firmware, guaranteeing the device is never bricked. Combined with the hardware AES‑256 and SHA accelerators, fully encrypted firmware updates can be implemented—ideal for industrial IoT gateways and critical infrastructure requiring highly reliable remote maintenance.
4. Are the Chrom‑ART accelerator and LCD controller fully featured on the H725? What display size can be driven?
Fully integrated. The Chrom‑ART (DMA2D) hardware accelerator handles 2D graphics operations without consuming extra I/Os. The on‑chip TFT‑LCD controller (LTDC) can bring out a complete 24‑bit RGB interface within the 114 I/Os of the LQFP‑144 package, directly driving displays up to 1024×768 resolution and smoothly running graphics libraries like TouchGFX. Compared to packages with fewer I/Os, the H725 offers more relaxed pin allocation between the display and other peripherals.
5. What are the differences between the STM32H725 and STM32H735? How should I choose?
Both share the same 550 MHz core, 1 MB dual‑bank Flash, 564 KB SRAM, Chrom‑ART, Ethernet, USB HS, and CAN FD. The H725 primarily streamlines some analog peripherals (such as the digital filter DFSDM and certain timer channels) to focus on pure digital real‑time control and graphics at a more competitive system cost. If your application does not require those specific analog features, the H725 can optimize your BOM without sacrificing processing performance.
6. What hardware security features does the chip integrate? Is secure boot supported?
It includes a hardware true‑random‑number generator (TRNG), an AES‑256 encryption accelerator, and SHA‑1/SHA‑2 and HMAC hashing accelerators for efficient encryption and authentication. Together with the dual‑bank Flash and code readout protection (RDP), it can establish a complete chain of trust from secure boot to encrypted firmware updates, effectively preventing unauthorized firmware access or tampering. This is especially important in payment terminals, IoT security gateways, and industrial controllers where IP protection is essential.
7. What external memory types can be connected via FMC and dual QSPI? Is SDRAM supported?
The Flexible Memory Controller (FMC) supports standard 16/32‑bit SDRAM, allowing up to 256 MB of runtime memory expansion, and can also interface with parallel NOR/NAND Flash. The dual Quad SPI interfaces support memory‑mapped mode and can connect high‑speed NOR Flash (up to 512 Mbit) or HyperRAM for code, graphics, and file storage. These interfaces do not conflict; within the LQFP‑144 package, you can simultaneously use a 32‑bit SDRAM bus and both QSPI ports to build a highly flexible memory architecture.
8. What high‑speed communication interfaces does the chip offer? Can Ethernet, USB HS, and CAN FD be used concurrently?
It integrates a 10/100M Ethernet MAC (with IEEE 1588 precision time protocol), a USB 2.0 OTG high‑speed controller (480 Mbps), and up to three FDCAN controllers. All can operate simultaneously without conflicts and feature dedicated DMA to significantly reduce CPU overhead. The LQFP‑144 package’s 114 I/Os are sufficient to bring out Ethernet RMII, USB HS ULPI, and multiple CAN FD channels while leaving ample GPIOs for other peripherals.
9. How should power and thermal management be handled at 550 MHz full load? Is the LQFP‑144 package reliable?
Typical power consumption at full load is around 1–1.5 W. The LQFP‑144 package has no exposed thermal pad, but effective heat dissipation can be achieved through a large ground copper pour under the chip, a multi‑layer PCB, and sufficient thermal vias—no external heatsink is required. The chip supports dynamic frequency scaling and multiple low‑power modes (Sleep, Stop, Standby) to significantly reduce power during idle periods. Within the commercial temperature range (0 °C–85 °C), good thermal design ensures reliable long‑term operation.
10. Is the software toolchain for the STM32H725ZGT6 mature? Can I reuse code from previous STM32F4/F7 projects?
Very mature. It is fully compatible with the STM32Cube ecosystem, including the free STM32CubeMX graphical configuration tool, STM32CubeIDE integrated development environment, and the feature‑rich STM32CubeH7 firmware package. When migrating from STM32F4 or F7, a large portion of HAL code can be reused, with the main adjustments being peripheral configuration and memory mapping. ST also provides extensive example projects and middleware covering Ethernet, USB, graphics, and file systems to jump‑start development.