The STM32F405RGT6 is a high-performance microcontroller launched by STMicroelectronics, based on the ARM Cortex-M4 core. It integrates a Floating Point Unit (FPU), with a main frequency of up to 168MHz, and is equipped with 1MB of Flash memory and 192KB of RAM. With its rich peripheral interfaces and low-power design, it is widely used in high-demand scenarios such as industrial automation, consumer electronics, medical devices, and drone control.
Key Features
High-performance Processing Capability
The ARM Cortex-M4 core supports the DSP instruction set and hardware floating-point operations (FPU).
With a maximum main frequency of 168MHz, the computing performance reaches 210 DMIPS, meeting real-time control requirements.
Abundant Peripheral Resources
Communication Interfaces: USB OTG, dual CAN, 3xSPI, 4xUSART, 3xI2C.
Multiple low-power modes (Stop, Standby, Sleep), with a power consumption as low as 238μA/MHz in the operating mode.
The operating voltage range is 1.8V - 3.6V, suitable for battery-powered devices.
Industrial-grade Reliability
The operating temperature range is -40°C to +85°C, meeting the requirements of industrial environments.
It has obtained the IEC 61508 SIL2 functional safety certification (supported by some models).
Technical Specifications
Parameter
Specification
Core
ARM Cortex-M4 (with FPU)
Main Frequency
168MHz
Flash Memory
1MB
RAM
192KB
Communication Interfaces
USB OTG/HS, CAN×2, SPI×3
ADC/DAC
3×12-bit ADCs, 2×12-bit DACs
Package
LQFP64
Operating Voltage
1.8V - 3.6V
Temperature Range
-40°C ~ +85°C
Certification
RoHS, IEC 61508 SIL2
Typical Applications
Industrial Control: PLC, motor drive, sensor data processing.
Consumer Electronics: Main control for smart home, drone flight control system.
Medical Devices: Portable monitors, control units for infusion pumps.
Communication Equipment: Gateways, Modbus protocol conversion modules.
Why Choose STM32F405RGT6?
Complete Ecosystem: ST provides STM32CubeIDE, rich example programs, and hardware evaluation boards (such as Nucleo-F405RG).
High Expandability: Supports Ethernet and Camera interfaces (external PHY or driver chips are required).
Long Lifecycle: Industrial-grade products are guaranteed to be stably supplied for more than 10 years.
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1. What are the key features of STM32F405RGT6? >
·Core: ARM Cortex-M4 with FPU, up to 168 MHz, delivering 210 DMIPS.
·Memory: 1 MB Flash, 192+4 KB SRAM (including 64 KB CCM RAM).
·Peripherals: USB OTG HS/FS, Ethernet MAC, 17 timers, 3×12-bit ADCs, 15 communication interfaces (SPI/I2C/USART/CAN).
·Package: LQFP64 (10×10 mm).
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2. How to configure the system clock for maximum performance? >
·Use an external crystal (HSE) as the clock source, then use PLL to reach 168 MHz.
·Ensure correct RCC register configuration and enable the ART (Adaptive Real-Time) accelerator for zero-wait Flash access.
·Example code can be found in the datasheet Section 2.2.12: Clocks and startup.
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3. How to optimize power consumption? >
·Low-power modes: Sleep, Stop, and Standby.
·Stop Mode: Disables the main clock but retains SRAM/register contents; wakes up via external interrupts.
·Standby Mode: Powers down the core, retains only the backup domain (RTC and backup registers); requires a reset or specific event to wake.
·Configuration details in Section 2.2.18: Low-power modes.
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