STM32F405RGT6

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STMicroelectronics STM32F405RGT6

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Part No.:
STM32F405RGT6
Manufacturer:
STMicroelectronics
Package:
64-LQFP
Datasheet:
STM32F405RGT6.pdf
Description:
IC MCU 32BIT 1MB FLASH 64LQFP
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2841
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    STM32F405RGT6 Pinout, Development Boards, and Arduino Projects

    The STM32F405RGT6 is a powerful microcontroller that belongs to STMicroelectronics' STM32 series. It offers a rich set of features, making it an excellent choice for a wide range of embedded systems projects, from hobbyist applications to complex industrial designs. In this article, we'll explore the STM32F405RGT6 pinout, development boards, and how it can be integrated into Arduino-based projects. Additionally, we'll look at useful resources such as the reference manual, datasheet, and other key documents to help you get started.


    Table of Contents

    Overview of the STM32F405RGT6 Microcontroller

    The STM32F405RGT6 is based on the ARM Cortex-M4 core, offering a high-performance solution for embedded systems. With a clock speed of up to 168 MHz, it provides substantial processing power for handling computationally intensive tasks. The microcontroller is equipped with various peripherals, such as ADCs, timers, communication interfaces (SPI, I2C, UART), and USB, making it highly versatile for a variety of applications.

    Key Features

    Core: ARM Cortex-M4 with FPU (Floating-Point Unit)

    Clock Speed: Up to 168 MHz

    Flash Memory: 512 KB

    RAM: 192 KB

    Peripherals: SPI, I2C, UART, CAN, USB, ADC, DAC

    Voltage Range: 2.0 to 3.6V

    Package: LQFP-64

    These features make the STM32F405RGT6 a powerful microcontroller for many embedded system projects.


    STM32F405RGT6 Pinout

    The pinout of the STM32F405RGT6 is an essential aspect to understand when designing a circuit. This microcontroller has a 64-pin LQFP (Low-profile Quad Flat Package) footprint, which provides ample I/O pins for various applications. Each pin has specific functions, such as GPIO (General Purpose Input/Output), analog inputs, PWM (Pulse Width Modulation) outputs, and more.

    STM32F405RGT6 Pinout

    STM32F405RGT6 Pinout

    Pinout Features

    Pin Number
    Pin Name
    Description
    1
    VBAT
    Battery input for RTC and backup registers
    2-5
    PC13, PC14, PC15, PH0
    General-purpose I/O and oscillator pin
    6
    PH1
    High-speed external oscillator pin 2
    7
    NRST
    Reset pin
    8-11
    PC0-PC3
    General-purpose I/O, Port C Pins 0-3
    12
    VSSA
    Analog ground
    13
    VDDA
    Analog power supply
    14-16
    PA0_WKUP, PA1, PA2
    Wakeup pin and general-purpose I/O, Port A
    17-19
    PA3, VSS, VDD
    Ground, power, and Port A Pin 3
    20-23
    PA4-PA7
    General-purpose I/O, Port A Pins 4-7
    24-25
    PC4-PC5
    General-purpose I/O, Port C Pins 4-5
    26-30
    PB0-PB11
    General-purpose I/O, Port B Pins 0-11
    31-32
    VCAP_1, VDD
    Capacitor pin and power supply
    33-36
    PB12-PB15
    General-purpose I/O, Port B Pins 12-15
    37-40
    PC6-PC9
    General-purpose I/O, Port C Pins 6-9
    41-44
    PA8-PA11
    General-purpose I/O, Port A Pins 8-11
    45-46
    PA12, PA13
    General-purpose and debug/Serial Wire Pins
    47-48
    VCAP_2, VDD
    Capacitor pin and power supply
    49-50
    PA14, PA15
    Debug/Serial Wire and general-purpose I/O
    51-53
    PC10-PC12
    General-purpose I/O, Port C Pins 10-12
    54
    PD2
    General-purpose I/O, Port D Pin 2
    55-59
    PB3-PB7
    General-purpose I/O, Port B Pins 3-7
    60
    BOOT0
    Boot configuration pin
    61-62
    PB8, PB9
    General-purpose I/O, Port B Pins 8-9
    63-64
    VSS, VDD
    Ground and power supply

    A detailed pinout diagram is available in the datasheet and schematic, providing a clear understanding of each pin's functionality. This is crucial when designing circuits that utilize the STM32F405RGT6, especially when integrating various peripherals and sensors.


    STM32F405RGT6 Typical Application Circuitry Schematics

    STM32F405RGT6 Typical application Circuitry Schematics

    STM32F405RGT6 Typical application Circuitry Schematics

    When designing a circuit with the STM32F405RGT6, adhering to proper schematic design principles is crucial for achieving reliable performance. Below are key considerations and typical circuitry setups for using the STM32F405RGT6 in an application.

    Power Supply: A 3.3V regulator with decoupling capacitors (0.1 µF) near VDD and VSS pins.

    Clock Circuit: An 8 MHz or 16 MHz crystal oscillator with load capacitors (e.g., 22 pF) or the internal RC oscillator.

    Reset Circuit: A 10 kΩ pull-up resistor on the NRST pin, with an optional reset button.

    USB Interface: D+ and D- connected through 22 Ω resistors, with a 1.5 kΩ pull-up on D+.

    SWD Debugging: SWDIO and SWCLK pins with a 10 kΩ pull-up resistor on SWDIO.

    BOOT Mode: BOOT0 pin pulled high (system memory boot) or low (Flash boot) using resistors.

    This setup ensures stable performance and facilitates debugging. Always refer to the datasheet for precise specifications.


    STM32F405RGT6 Development Boards

    Several development boards utilize the STM32F405RGT6, offering an easy way to get started with the microcontroller without the need for designing a custom PCB (Printed Circuit Board). One of the most popular development boards based on this microcontroller is the Blue Pill. The Blue Pill board has become a favorite among hobbyists due to its low price and versatile features.

    Blue Pill Board

    The Blue Pill is a compact development board that features the STM32F103C8T6 microcontroller, a sibling of the STM32F405RGT6. However, there are other development boards, like the STM32F4 Discovery, that specifically feature the STM32F405RGT6. These boards come with integrated peripherals such as an onboard debugger, power supply, and various I/O pins.

    Key Features of Development Boards

    Price: STM32F405RGT6-based boards are generally affordable, with many options available at competitive prices.

    Onboard Debugging: Many development boards, including the Blue Pill and STM32F4 Discovery, come with an integrated debugger, making programming and debugging easier.

    Power Supply: The STM32F405RGT6 requires a stable 3.3V or 5V power supply, depending on the specific development board you choose.

    The development boards are well-suited for both novice and advanced users, making them ideal for learning STM32 programming and building embedded applications.


    STM32F405RGT6 Programming

    Programming the STM32F405RGT6 can be done using various tools and environments. The most common approach is to use STM32CubeIDE, which is STMicroelectronics' integrated development environment (IDE). Additionally, many developers use Arduino IDE with an STM32 core added to create projects in a more familiar environment.

    STM32 Programming with Arduino IDE

    STM32F405RGT6 Arduino

    STM32F405RGT6 Arduino

    If you are familiar with Arduino, you will be pleased to know that the STM32F405RGT6 can be programmed using the Arduino IDE. To get started, you'll need to install the STM32 core for Arduino, which provides support for STM32 microcontrollers in the Arduino IDE.

    To upload code to the STM32F405RGT6, you will need to use a bootloader. The bootloader allows the microcontroller to load code from external storage via serial communication or USB. The STM32F405RGT6 has a built-in bootloader, which simplifies the process of flashing new firmware to the board.

    Circuit Design and Programming

    When creating your own circuit using the STM32F405RGT6, it is essential to understand the footprint of the microcontroller. The footprint refers to the physical dimensions of the microcontroller and its pin layout, which are necessary to create custom PCBs.

    Key Programming Considerations:

    Bootloader: You will need to configure the microcontroller to enter bootloader mode to flash the firmware.

    Debugging: You can use external debuggers, such as ST-Link, to debug your code while running on the STM32F405RGT6.

    Flash Memory: The STM32F405RGT6 comes with 1MB of Flash memory and 192KB of RAM, which should be sufficient for most embedded projects.


    STM32F405RGT6 Projects

    With its high-performance ARM Cortex-M4 processor and rich set of features, the STM32F405RGT6 is ideal for a wide range of embedded projects. Whether you're building a home automation system, a robotics project, or a sensor-based application, the STM32F405RGT6 offers the flexibility and power needed for advanced designs.

    Sample Arduino Projects with STM32F405RGT6

    Here are a few ideas for Arduino-compatible projects using the STM32F405RGT6:

    1. Temperature and Humidity Monitoring System

    Using the STM32F405RGT6 with a DHT22 or BME280 sensor, you can build a temperature and humidity monitoring system. The microcontroller can read the sensor data and display it on an LCD or OLED screen.

    2. Motor Control System

    By interfacing the STM32F405RGT6 with a motor driver, you can control DC motors or stepper motors. PWM outputs can be used to vary the speed of the motors, making this ideal for robotics projects.

    3. IoT Weather Station

    Combine the STM32F405RGT6 with a Wi-Fi or Bluetooth module, such as the ESP8266 or HC-05, to create an IoT-based weather station. You can send data to a cloud service or mobile app for real-time monitoring.


    Datasheet, Schematic, and Reference Manual

    To make the most of the STM32F405RGT6, it is crucial to consult the datasheet and reference manual. These documents provide in-depth technical details about the microcontroller, including its electrical characteristics, memory layout, and pinout configuration. The schematic of a development board can also be invaluable when troubleshooting your design or modifying the board to suit your needs.

    Reference Manual: The reference manual offers a comprehensive guide to the STM32F405RGT6's functionality, peripheral configuration, and programming.

    Datasheet: The datasheet provides electrical specifications, including voltage ranges, current consumption, and pinout information.

    Schematic: A schematic of the development board helps you understand how the STM32F405RGT6 is connected to other components, such as power supply, communication interfaces, and peripheral devices.


    STM32F405RGT6 Package and Footprint

    Key Dimensions of the STM32F405RGT6 LQFP-64 Package

    STM32F405RGT6 package

    STM32F405RGT6 package

    Overall Package Size:

    D/E (Body Size): 12.00 mm ± 0.20 mm.

    D1/E1 (Pin Footprint Size): 10.00 mm ± 0.20 mm.

    Pin Dimensions:

    b (Pin Width): 0.17 mm to 0.27 mm.

    L (Pin Length): 0.45 mm to 0.75 mm.

    e (Pin Pitch): 0.50 mm (constant).

    Height:

    A (Maximum Height): 1.60 mm.

    A1 (Stand-Off Height): 0.05 mm to 0.15 mm.

    Thermal Pad (if applicable):

    Central area for heat dissipation is part of some LQFP packages, but it depends on the specific design (not explicitly shown in this drawing).

    Corner Indicators:

    Pin 1 is marked with a small dot or bevel to indicate orientation.

    Key Dimensions of the STM32F405RGT6 Footprint

    STM32F405RGT6 Footprint

    STM32F405RGT6 Footprint

    Outer Dimensions:

    Overall size: 12.70 mm × 12.70 mm (square).

    Pin-to-pin diagonal span (center to center): Approximately 10.30 mm.

    Pin Pitch:

    0.50 mm spacing between adjacent pins.

    Pad Dimensions:

    Pad width: 0.30 mm.

    Pad length: 1.20 mm.

    Inner Pad Spacing:

    Center-to-center spacing between opposing sides: 7.80 mm.


    Sum up

    The STM32F405RGT6 is a powerful and versatile microcontroller suitable for a wide variety of embedded systems projects. Whether you're using a development board like the Blue Pill or designing your own custom circuit, the STM32F405RGT6 provides the performance and features necessary for both simple and complex applications. With its Arduino compatibility, this microcontroller is accessible to a broad audience, making it a great choice for both beginners and experienced developers. For further development, be sure to consult the reference manual, datasheet, and schematic to understand the full potential of the STM32F405RGT6 in your next project.


    Frequently Asked Questions

    What boot modes does STM32F405RGT6 support?

    It supports Flash, system memory (bootloader), and SRAM boot modes, configurable via BOOT0 and BOOT1 pins.

    How to use PWM on STM32F405RGT6?

    PWM can be generated using timers. Configure the desired timer channel as PWM mode in STM32CubeMX or directly in the code.

    Can STM32F405RGT6 interface with external memories?

    Yes, it supports external memories like SRAM, SDRAM, and NOR Flash via its FSMC (Flexible Static Memory Controller).

    Is STM32F405RGT6 suitable for low-power applications?

    Yes, it has low-power modes like Sleep, Stop, and Standby for energy-efficient designs.

    Does STM32F405RGT6 have hardware encryption?

    Yes, it includes a cryptographic accelerator for AES, DES, and SHA algorithms.

    What debugging tools work with STM32F405RGT6?

    ST-Link, J-Link, and other ARM-compatible debuggers are supported.

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