STMicroelectronics STM32F103CBT6

STM32F103CBT6 is a versatile ARM Cortex-M3 microcontroller that is well suited for embedded projects. This article describes its pinout, programming and use in Arduino projects, including schematic design and blue pill development board.

Table of Contents

• 1. Introduction to STM32F103CBT6
• 2. STM32F103CBT6 Pinout
• 3. STM32F103CBT6 Features
• 4. Design circuits and Schematics
• 5. Application of STM32F103CBT6
• 6. STM32F103CBT6 is used in Arduino project
• 7. Sum up
• 8. Frequently Asked Questions

1. Introduction to STM32F103CBT6

STM32F103CBT6 is a 32-bit microcontroller launched by STMicroelectronics, which belongs to the STM32 family. The core of the microcontroller is an ARM Cortex-M3 with a clock frequency of up to 72MHz, and it has 128KB flash memory and 20KB SRAM. STM32F103CBT6 supports a variety of peripheral interfaces, including I2C, SPI, USART, PWM, etc., suitable for simple sensor reading to complex control system development.

2. STM32F103CBT6 Pinout

The pinout definition of STM32F103CBT6 is described in detail in its reference manual. Different pinout have different functions, mainly including power pinout, communication pinout, clock pinout, input and output pinout, etc. Understanding the functionality of these pinout is fundamental for effective development.

2.1 Pinout function

2.2 STM32F103CBT6 package

3. STM32F103CBT6 Features

4. Design circuits and Schematics

Designing circuits and schematics is an essential step when developing a system based on the STM32F103CBT6 microcontroller. These design drawings help developers plan how components are connected, how they function, and ensure that electrical and physical characteristics meet requirements.

4.1 Circuit diagram

The circuit diagram shows all the components in the system and how they are connected. When designing the STM32F103CBT6 project, the circuit diagram needs to indicate the electrical connection between each peripheral device (such as sensor, display, motor, etc.) and STM32F103CBT6.

I2C interface : STM32F103CBT6 is connected to the temperature sensor through the I2C interface for reading temperature data.

GPIO pin connected to LCD monitor : Use the GPIO pin of STM32F103CBT6 to control the display content of LCD monitor.

4.2 Schematic diagram

The schematic shows the electrical connection of each circuit element in detail. Unlike circuit diagrams, schematic diagrams focus more on electrical characteristics, signal flow, and connection specifications. It helps developers understand how circuits work and ensures that there are no electrical conflicts or incorrect connections.

When designing STM32F103CBT6 schematics, it is usually necessary to:

Power management : Provide stable power supply for STM32F103CBT6, usually 3.3V power supply is used.

Clock system : Choose a suitable external oscillator or use a built-in oscillator to ensure the accuracy of the system clock.

Communication interface : such as UART, SPI, I2C, etc., for data exchange with peripherals.

4.3 Footprint design

Footprint is the pad layout reserved for components on the PCB, ensuring that components are properly soldered to the circuit board. For the STM32F103CBT6 microcontroller, the LQFP-48 package is usually used, so the corresponding Footprint must conform to the size and pinout of this package. Footprint ensures that the welding position of STM32F103CBT6 and other components is accurate.

5. Application of STM32F103CBT6

STM32F103CBT6 has a wide range of uses in various applications, from simple LED control to complex sensor data acquisition systems, which can be implemented by STM32F103CBT6.

5.1 Embedded system:

The low power consumption and high performance of STM32F103CBT6 make it an ideal choice for embedded systems. It can be used to control home appliances, monitoring systems, wireless sensors, etc.

5.2 Internet of Things:

Combined with the wireless communication module, STM32F103CBT6 can be used as the core of the iot device to collect sensor data and transmit it through the network.

5.3 Robot control:

The rich peripheral interfaces of the STM32F103CBT6 make it well suited for robot control applications, capable of controlling motors, servos, and sensors.

5.4 Automatic control:

In the field of industrial automation, STM32F103CBT6 can be used for the acquisition and processing of temperature, humidity, pressure and other data, as well as the automatic control of equipment.

6. STM32F103CBT6 is used in Arduino project

Although STM32F103CBT6 is not the official MCU of Arduino, developers can still use STM32F103CBT6 in the Arduino environment by using an appropriate development board (such as the blue pill development board) and the STM32 Arduino library. This provides developers with a flexible platform that balances the ease of use of Arduino with the power of STM32.

6.1 Blue pill development board

Blue Pill is a development board based on STM32F103CBT6, which is popular among developers because of its user-friendly appearance and price. It provides most of the I/O pins of the STM32F103CBT6 and has a USB interface to support programming via USB.

In order to use STM32F103CBT6 in Arduino, the developer first needs to install the appropriate Bootloader for the blue pill. Through Bootloader, developers can directly burn the program to STM32F103CBT6 through the USB interface. Next, you can write and upload the code in the Arduino IDE by simply selecting the corresponding development board and chip model.

6.2 Programming of STM32F103CBT6 in Arduino

The programming method of STM32F103CBT6 is different from the traditional Arduino board. First of all, you need to install the relevant drivers and library files of STM32 in the Arduino IDE. Once the installation is complete, you can develop using standard Arduino programming languages like C++.

For example, if you want to control an LED to flash, you can use the following Arduino code:

This code, when run on an STM32F103CBT6, will cause the LED connected to the 13 pinout to flash once per second.

7. Sum up

STM32F103CBT6 is a powerful microcontroller ideal for various development projects. Using it with Arduino simplifies development, combining high-performance hardware with easy-to-use software. By mastering its pinout, board usage, schematic design, and programming, developers can create diverse applications, from IoT to robotics, meeting the demands of modern embedded systems.

8. Frequently Asked Questions

8.1 What is the price of STM32F103CBT6?

The STM32F103CBT6 costs between $2 and $5, depending on the supplier and the amount purchased.

8.2 Where can I find the datasheet for STM32F103CBT6?

The datasheet for STM32F103CBT6 can be found on our website

8.3 Can STM32F103CBT6 be used for USB communication?

Yes, with appropriate firmware or bootloaders, it supports USB communication.

8.4 How to program STM32F103CBT6 with Arduino IDE?

Install STM32 core in Arduino IDE, select the board, and upload code via USB or ST-Link.

8.5 What is the power consumption of STM32F103CBT6?

It typically consumes 20mA at 72MHz, and less in power-saving modes.

8.6 Can STM32F103CBT6 be used for motor control?

Yes, with its PWM, ADCs, and timers, it's ideal for motor control applications.