The STM32F103CBU6 is a microcontroller from the STM32F1 series produced by STMicroelectronics. It belongs to the STM32 family, which is based on ARM Cortex-M3 architecture. Below, I’ll give you a detailed explanation of the pin functions, the encapsulation, and the circuit principle. For a complete breakdown of all the pins, their functions, and other details, please see the tables and the FAQ section that follow.
STM32F103CBU6 Pinout
The STM32F103CBU6 is available in a LQFP-48 (Low-profile Quad Flat Package, 48 pins) configuration. Here’s a breakdown of the 48 pins and their functions:
Pin Number Pin Name Function 1 PA13 SWDIO (Serial Wire Debug Input/Output) 2 PA14 SWCLK (Serial Wire Clock ) 3 PA15 JTDI (JTAG Test Data Input) 4 PB0 GPIO (General Purpose Input/Output), can also be used as EXTI0 (External Interrupt) 5 PB1 GPIO, EXTI1 6 PB2 GPIO, EXTI2 7 PB3 GPIO, EXTI3 8 PB4 GPIO, EXTI4 9 PB5 GPIO, SPI1_MOSI (Master Out Slave In) 10 PB6 GPIO, SPI1_MISO (Master In Slave Out) 11 PB7 GPIO, SPI1_SCK (Serial Clock) 12 PB8 GPIO, I2C1_SCL (I2C Clock) 13 PB9 GPIO, I2C1_SDA (I2C Data) 14 PC13 GPIO, EXTI15 (External Interrupt) 15 PC14 GPIO, OSC_IN (Oscillator Input) 16 PC15 GPIO, OSC_OUT (Oscillator Output) 17 PD0 GPIO, CAN_RX (CAN Bus Receive) 18 PD1 GPIO, CAN_TX (CAN Bus Transmit) 19 PD2 GPIO, UART1_RX (UART Receive) 20 PD3 GPIO, UART1_TX (UART Transmit) 21 PD4 GPIO, UART2_RX (UART Receive) 22 PD5 GPIO, UART2_TX (UART Transmit) 23 PD6 GPIO, I2S_CK (I2S Clock) 24 PD7 GPIO, I2S_SDI (I2S Serial Data Input) 25 PD8 GPIO, I2S_SDO (I2S Serial Data Output) 26 PD9 GPIO, I2S_WS (I2S Word Select) 27 PE0 GPIO, EXTI0 28 PE1 GPIO, EXTI1 29 PE2 GPIO, EXTI2 30 PE3 GPIO, EXTI3 31 PE4 GPIO, EXTI4 32 PE5 GPIO, EXTI5 33 PE6 GPIO, EXTI6 34 PE7 GPIO, EXTI7 35 PE8 GPIO, EXTI8 36 PE9 GPIO, EXTI9 37 PE10 GPIO, EXTI10 38 PE11 GPIO, EXTI11 39 PE12 GPIO, EXTI12 40 PE13 GPIO, EXTI13 41 PE14 GPIO, EXTI14 42 PE15 GPIO, EXTI15 43 NRST Reset Pin 44 VDD Supply Voltage 45 VSS Ground 46 VDDA Analog Supply Voltage 47 VSSA Analog Ground 48 BOOT0 Boot Mode Selection Pin (used to choose bootloader or application mode)Key Pin Functions and Features:
General Purpose I/O (GPIO) pins: Most pins on the STM32F103CBU6 can be configured as general-purpose input or output pins. SPI, I2C, UART, CAN, and I2S interface s: This chip includes support for serial communication peripherals including SPI, I2C, UART, CAN, and I2S interfaces. External Interrupts: Many pins support external interrupts (EXTI0 to EXTI15), which allow the microcontroller to respond to external signals from sensors or other devices. Analog and Digital Functions: Some pins have dual functions, such as ADC (Analog-to-Digital Conversion) inputs and PWM (Pulse Width Modulation) outputs. Debug and Programming Pins: SWDIO, SWCLK, and JTAG pins support debugging and programming operations.Pin Encapsulation and Additional Details
The LQFP-48 package, which stands for Low-profile Quad Flat Package with 48 pins, is commonly used for embedded systems and is often preferred for its relatively small size and ease of integration into designs requiring a high number of GPIOs.
Frequently Asked Questions (FAQ)
Q1: What is the supply voltage for the STM32F103CBU6? A1: The STM32F103CBU6 operates with a supply voltage of 2.0V to 3.6V.
Q2: How many GPIO pins does the STM32F103CBU6 have? A2: The STM32F103CBU6 has 48 pins, with 37 GPIO pins.
Q3: Can the pins be used for analog functions? A3: Yes, some of the pins support Analog-to-Digital Conversion (ADC) and Pulse Width Modulation (PWM).
Q4: What is the clock frequency of the STM32F103CBU6? A4: The STM32F103CBU6 can operate with a clock frequency of up to 72 MHz.
Q5: What communication protocols are supported by this microcontroller? A5: The STM32F103CBU6 supports SPI, I2C, UART, CAN, and I2S protocols.
Q6: What is the function of the BOOT0 pin? A6: The BOOT0 pin determines the boot mode of the microcontroller, allowing it to either run code from the internal Flash memory or from an external device.
Q7: Can the STM32F103CBU6 be used in low-power applications? A7: Yes, the STM32F103CBU6 has several low-power modes such as Sleep Mode and Stop Mode to reduce power consumption.
Q8: What is the function of the NRST pin? A8: The NRST pin is the Reset pin, which is used to reset the microcontroller.
Q9: Can the microcontroller communicate with a CAN bus? A9: Yes, the STM32F103CBU6 has CAN communication support via the CANRX and CANTX pins.
Q10: What is the maximum operating temperature of the STM32F103CBU6? A10: The STM32F103CBU6 operates within the temperature range of -40°C to +85°C.
Q11: Does the STM32F103CBU6 support USB communication? A11: No, this specific model does not support USB communication natively.
Q12: What kind of debugging interfaces are available for this microcontroller? A12: The STM32F103CBU6 supports JTAG and SWD (Serial Wire Debug) for debugging.
Q13: How many external interrupts are available on the STM32F103CBU6? A13: The STM32F103CBU6 has 16 external interrupts (EXTI0 to EXTI15).
Q14: What is the maximum current that each GPIO pin can source? A14: Each GPIO pin can source a maximum current of 25mA.
Q15: How do I set up PWM on the STM32F103CBU6? A15: You can configure PWM by setting the GPIO pins to Alternate Function mode and using timers.
Q16: What is the maximum ADC resolution of the STM32F103CBU6? A16: The STM32F103CBU6 has a 12-bit ADC resolution.
Q17: Can I use the STM32F103CBU6 for motor control? A17: Yes, you can use the STM32F103CBU6 for motor control with features like PWM, timers, and analog inputs for feedback.
Q18: Does the STM32F103CBU6 have a built-in RTC (Real-Time Clock)? A18: Yes, the STM32F103CBU6 has an embedded RTC to keep track of time.
Q19: What is the memory configuration of the STM32F103CBU6? A19: The STM32F103CBU6 has 128 KB of Flash memory and 20 KB of SRAM.
Q20: Can I use an external oscillator with the STM32F103CBU6? A20: Yes, you can use an external oscillator, and the microcontroller supports both external crystal oscillators and external clock signals.
If you have any other specific questions or need more details, feel free to ask!