Overview
The STM32H745ZIT6U, produced by STMicroelectronics, is a high-performance microcontroller based on the Arm® Cortex®-M7 and Cortex®-M4 32-bit RISC cores. The Cortex®-M7 core operates at up to 480 MHz, while the Cortex®-M4 core operates at up to 240 MHz. Both cores feature a floating point unit (FPU) supporting single- and double-precision operations and include a full set of DSP instructions and a memory protection unit (MPU) for enhanced application security.
This microcontroller is part of the STM32H745xI/G series, which incorporates high-speed embedded memories, extensive I/Os, and a wide range of peripherals connected to APB, AHB, and AXI buses.
Key Specifications
| Parameter | Specification |
|---|---|
| Cores | 32-bit Arm® Cortex®-M7 and Cortex®-M4 |
| Core Frequencies | Cortex®-M7: up to 480 MHz, Cortex®-M4: up to 240 MHz |
| Flash Memory | Up to 2 Mbytes with read-while-write support |
| RAM | Up to 1 Mbyte: 192 Kbytes of TCM RAM, up to 864 Kbytes of user SRAM, and 4 Kbytes of backup SRAM |
| ADCs | 3 ADCs with 16-bit max. resolution (up to 36 channels, up to 3.6 MSPS) |
| DACs | 2 × 12-bit D/A converters (1 MHz) |
| Timers | 12 × 16-bit timers, 2 × 32-bit timers |
| Communication Peripherals | Up to 35 peripherals including I2Cs, USARTs, SPIs, CAN controllers, USB OTG, and Ethernet MAC |
| Operating Temperature | -40°C to 125°C |
| Power Modes | Sleep, Stop, Standby, VBAT with battery charging capability |
| Standby Current | 2.95 µA (Backup SRAM OFF, RTC/LSE ON) |
Key Features
- Dual-core architecture with Arm® Cortex®-M7 and Cortex®-M4 cores, each with an FPU and DSP instructions.
- High-speed embedded memories: up to 2 Mbytes of flash and up to 1 Mbyte of RAM.
- Extensive range of I/Os and peripherals connected to APB, AHB, and AXI buses.
- Three ADCs, two DACs, two ultra-low power comparators, and a low-power RTC.
- Multiple timers including 12 general-purpose 16-bit timers and two PWM timers for motor control.
- Advanced communication interfaces: I2Cs, USARTs, SPIs, CAN FD, USB OTG, and Ethernet MAC.
- Low-power modes: Sleep, Stop, Standby, and VBAT with battery charging capability.
- Clock management with internal and external oscillators and three PLLs with Fractional mode.
- Four DMA controllers to unload the CPU and multiple interconnect matrices for efficient data transfer.
Applications
The STM32H745ZIT6U is suitable for a wide range of applications due to its high performance, low power consumption, and extensive peripheral set. Key applications include:
- Industrial automation and control systems.
- Medical devices requiring high precision and reliability.
- Automotive systems, including advanced driver-assistance systems (ADAS).
- Consumer electronics, such as smart home devices and IoT applications.
- Aerospace and defense systems where high reliability and performance are critical.
Q & A
- What are the core frequencies of the STM32H745ZIT6U?
The Cortex®-M7 core operates at up to 480 MHz, and the Cortex®-M4 core operates at up to 240 MHz.
- How much flash and RAM does the STM32H745ZIT6U have?
It has up to 2 Mbytes of flash memory and up to 1 Mbyte of RAM.
- What types of ADCs and DACs are available on this microcontroller?
It features three ADCs with 16-bit max. resolution and two 12-bit D/A converters.
- What are the low-power modes supported by the STM32H745ZIT6U?
The microcontroller supports Sleep, Stop, Standby, and VBAT modes with battery charging capability.
- What is the standby current consumption of the STM32H745ZIT6U?
The standby current is 2.95 µA (Backup SRAM OFF, RTC/LSE ON).
- What communication peripherals are available on this microcontroller?
It includes I2Cs, USARTs, SPIs, CAN FD, USB OTG, and Ethernet MAC among others.
- What is the operating temperature range of the STM32H745ZIT6U?
The operating temperature range is -40°C to 125°C.
- Does the STM32H745ZIT6U support external memory interfaces?
Yes, it supports a flexible external memory controller with up to 32-bit data bus for SRAM, PSRAM, SDRAM/LPSDR SDRAM, and NOR/NAND flash memory.
- What security features are included in the STM32H745ZIT6U?
The microcontroller includes a memory protection unit (MPU), ROP, PC-ROP, and active tamper detection.
- How many DMA controllers does the STM32H745ZIT6U have?
It has four DMA controllers, including a high-speed master DMA, dual-port DMAs, and a basic DMA with request router capabilities.
