Overview
The STM32F103CBT6 is a 32-bit microcontroller launched by STMicroelectronics based on the ARM Cortex-M3 core . It has a main frequency of up to 72MHz , built-in 128KB Flash program memory and 20KB SRAM , and integrates a rich set of peripheral interfaces (such as USART, SPI, I²C, USB, CAN, ADC, timers, etc.).
The device uses an LQFP-48 package and has low power consumption, high performance, and good real-time processing capabilities. It is widely used in industrial control, consumer electronics, communication equipment, automotive electronics, and the Internet of Things (IoT) .
Core parameters
Parameter | Numerical |
Kernel | ARM Cortex-M3, 32-bit RISC |
Maximum main frequency | 72MHz |
Flash memory | 128KB |
SRAM | 20KB |
Operating voltage range | 2.0V ~ 3.6V |
Number of I/Os | 37 general-purpose I/O pins |
ADC | 2 × 12-bit, 16 channels, 1Msps |
DAC | Not supported (supported by optional models) |
Timer/Counter | 3 × general-purpose timers, 1 × advanced timer, 2 × watchdog timers |
Communication interface | 3 × USART, 2 × SPI, 2 × I²C, CAN 2.0B, USB 2.0 Full-Speed Device |
DMA controller | 7-channel DMA |
Power Management | Supports sleep/standby/stop modes |
Operating temperature range | –40°C to +85°C |
Package | LQFP-48 (7×7 mm²) |
Features
High performance and low power consumption
Cortex-M3 core + 72MHz main frequency, supports efficient real-time processing, and has low power consumption mode.
Rich peripheral resources
Built-in multiple communication interfaces (USART, SPI, I²C, CAN, USB) support complex embedded applications.
Powerful simulation features
Two 12-bit ADCs, a total of 16 channels, with a sampling rate of up to 1Msps, are suitable for multi-sensor signal acquisition.
Flexible clock system
Built-in high-speed PLL, can be provided by external crystal oscillator clock source.
High cost-effectiveness and stable ecology
As one of the main models of the STM32F1 series, it has complete documentation, supporting development boards and rich library functions.
Typical application scenarios
Industrial Control
PLC, industrial control module, motor drive and data acquisition.
Internet of Things (IoT)
Smart home nodes and remote monitoring equipment.
Consumer Electronics
Smart home appliances, wearable devices, digital cameras.
Automotive Electronics
On-board control unit, body network node (CAN bus).
Communication and interface control
USB peripherals, gateways, protocol converters.
Performance Comparison
Index | STM32F103CBT6 | AT91SAM7X256-AU (ARM7 core) |
Kernel architecture | ARM Cortex-M3 | ARM7TDMI-S |
Main frequency | 72MHz | 55MHz |
Flash memory | 128KB | 256KB |
SRAM | 20KB | 64KB |
ADC | 12 bits × 16 channels | 10 bits × 8 channels |
CAN bus | support | support |
USB | support | Support (full-speed device side) |
Power consumption performance | Better (supports multiple low power modes) | generally |
The STM32F103CBT6 offers better performance, power consumption, and peripheral flexibility , and has a more complete ecosystem.
Manufacturer Profile: STMicroelectronics
STMicroelectronics is a world-renowned semiconductor manufacturer, with a product portfolio encompassing MCUs, power semiconductors, sensors, and analog chips. The STM32 series MCUs, with its extensive product line and robust ecosystem, are widely used in industrial, automotive, and consumer electronics applications. The STM32F103CBT6, a member of the classic STM32F1 series, is a popular choice among embedded developers for its cost-effectiveness and powerful peripherals.
Why choose the STM32F103CBT6?
● High-performance Cortex-M3 core (72MHz) with strong real-time processing capabilities
● Rich peripherals (USART, SPI, I²C, CAN, USB) suitable for multi-protocol systems
● 12-bit high-speed ADC suitable for multi-sensor analog acquisition
● Low power mode supports battery-powered applications
● Mature ecosystem with rich development resources, supporting tools such as Keil, IAR, and STM32CubeMX
Frequently Asked Questions (FAQ)
Q1: Is the STM32F103CBT6 suitable for beginners?
A: Yes, it is . The STM32F1 series is the most classic and widely used STM32 microcontroller series, with a wealth of supporting documentation, open source projects, and learning tutorials. Its comprehensive peripherals (including ADC, USART, SPI, I²C, CAN, and more) meet both beginners’ learning needs and the stability and reliability required for mass production designs.
Q2: Can this chip run FreeRTOS?
A: Yes . The STM32F103CBT6 features 128KB of Flash and 20KB of RAM , sufficient for running lightweight real-time operating systems like FreeRTOS . Common applications include task scheduling, peripheral management, and communication protocol stack execution. For applications with more complex tasks or involving complex graphics or network protocols, it is recommended to select an STM32F103 series model with greater memory capacity to ensure system performance.
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