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STM32F401CBU6 Detailed explanation of pin function specifications and circuit principle instructions

The "STM32F401CBU6" is a microcontroller from the STMicroelectronics STM32 family, part of their ARM Cortex-M4 series. This specific model is based on the ARM Cortex-M4 core with a floating-point unit (FPU). The STM32F401CBU6 chip is designed for a wide range of applications requiring high performance, low Power consumption, and an extensive peripheral set.

Package and Pin Specifications for STM32F401CBU6

The STM32F401CBU6 is offered in a LQFP (Low-profile Quad Flat Package) with 64 pins.

Here’s a detailed breakdown of the 64-pin package and their functionalities:

Pin Number Pin Name Pin Function 1 VSS Ground Pin 2 VDD Power Supply Pin (3.3V) 3 VCAP1 Internal Voltage Regulator capacitor Pin 4 NRST Reset Pin 5 PA0 GPIO, External Interrupt, ADC In 6 PA1 GPIO, External Interrupt, ADC In 7 PA2 GPIO, External Interrupt, USART2 TX 8 PA3 GPIO, External Interrupt, USART2 RX 9 PA4 GPIO, External Interrupt, SPI1 MISO 10 PA5 GPIO, External Interrupt, SPI1 SCK 11 PA6 GPIO, External Interrupt, USART1 RX 12 PA7 GPIO, External Interrupt, USART1 TX 13 PB0 GPIO, External Interrupt, TIM3 CH3 14 PB1 GPIO, External Interrupt, TIM3 CH4 15 PB2 GPIO, External Interrupt, SPI1 SCK 16 PB3 GPIO, External Interrupt, SPI1 MISO 17 PB4 GPIO, External Interrupt, TIM3 CH1 18 PB5 GPIO, External Interrupt, TIM3 CH2 19 PB6 GPIO, External Interrupt, I2C1 SCL 20 PB7 GPIO, External Interrupt, I2C1 SDA 21 PC0 GPIO, External Interrupt, ADC In 22 PC1 GPIO, External Interrupt, ADC In 23 PC2 GPIO, External Interrupt, ADC In 24 PC3 GPIO, External Interrupt, ADC In 25 PC4 GPIO, External Interrupt, ADC In 26 PC5 GPIO, External Interrupt, ADC In 27 PC6 GPIO, External Interrupt, USART1 TX 28 PC7 GPIO, External Interrupt, USART1 RX 29 PD0 GPIO, External Interrupt, TIM4 CH1 30 PD1 GPIO, External Interrupt, TIM4 CH2 31 PD2 GPIO, External Interrupt, TIM4 CH3 32 PD3 GPIO, External Interrupt, TIM4 CH4 33 PD4 GPIO, External Interrupt, SPI2 MISO 34 PD5 GPIO, External Interrupt, SPI2 SCK 35 PD6 GPIO, External Interrupt, I2C2 SCL 36 PD7 GPIO, External Interrupt, I2C2 SDA 37 PE0 GPIO, External Interrupt, ADC In 38 PE1 GPIO, External Interrupt, ADC In 39 PE2 GPIO, External Interrupt, ADC In 40 PE3 GPIO, External Interrupt, ADC In 41 PE4 GPIO, External Interrupt, ADC In 42 PE5 GPIO, External Interrupt, ADC In 43 PE6 GPIO, External Interrupt, USART2 TX 44 PE7 GPIO, External Interrupt, USART2 RX 45 PE8 GPIO, External Interrupt, I2C1 SDA 46 PE9 GPIO, External Interrupt, I2C1 SCL 47 PF0 GPIO, External Interrupt, ADC In 48 PF1 GPIO, External Interrupt, ADC In 49 PF2 GPIO, External Interrupt, ADC In 50 PF3 GPIO, External Interrupt, ADC In 51 PF4 GPIO, External Interrupt, ADC In 52 PF5 GPIO, External Interrupt, ADC In 53 PF6 GPIO, External Interrupt, USART3 TX 54 PF7 GPIO, External Interrupt, USART3 RX 55 VSS Ground Pin 56 VDD Power Supply Pin (3.3V) 57 NC Not Connected 58 NC Not Connected 59 NC Not Connected 60 NC Not Connected 61 NC Not Connected 62 NC Not Connected 63 NC Not Connected 64 NC Not Connected

FAQs for STM32F401CBU6 Pin Functionality

1. Q: What is the power supply voltage for STM32F401CBU6? A: The power supply voltage for STM32F401CBU6 is 3.3V (VDD).

2. Q: How many pins does STM32F401CBU6 have? A: The STM32F401CBU6 has a 64-pin LQFP package.

3. Q: Can I use all GPIO pins for ADC input? A: Not all GPIO pins are connected to the ADC. For the STM32F401CBU6, PA0-PA7, PB0-PB1, PC0-PC5, and PF0-PF5 are typically ADC input pins.

4. Q: What is the function of pin NRST? A: The NRST pin is the external reset pin. It is used to reset the microcontroller.

5. Q: What is the role of pin VCAP1? A: VCAP1 is a capacitor pin used for the internal voltage regulator.

6. Q: What is the function of the PA2 and PA3 pins? A: PA2 is USART2 TX (Transmit) and PA3 is USART2 RX (Receive).

7. Q: Can I use PA5 as a regular GPIO? A: Yes, PA5 can be configured as a regular GPIO, but it is also used as SPI1 SCK.

8. Q: Which pins are used for SPI communication? A: SPI1 uses pins PA4 (MISO), PA5 (SCK), PA6 (MOSI), and PA7 (NSS). SPI2 uses pins PD4 (MISO), PD5 (SCK), PD6 (MOSI), and PD7 (NSS).

9. Q: Can I use PB6 and PB7 for I2C? A: Yes, PB6 and PB7 can be used for I2C1 SCL and SDA, respectively.

10. Q: What is the maximum clock frequency for STM32F401CBU6? A: The STM32F401CBU6 can operate at a maximum frequency of 84 MHz.

11. Q: Can the GPIO pins be configured for PWM? A: Yes, several GPIO pins support PWM functionality through timers, such as PA0-PA7, PB0-PB7, and PC0-PC5.

12. Q: Is there any pin dedicated to the reset function? A: Yes, the NRST pin is dedicated to the reset function.

13. Q: Can I use the PA9 and PA10 pins for USART1? A: Yes, PA9 is USART1 TX and PA10 is USART1 RX.

14. Q: Can I use PD3 and PD4 for UART communication? A: Yes, PD3 and PD4 can be used for USART3 TX and RX.

15. Q: How do I configure the pins for I2C communication? A: I2C1 uses PB6 (SCL) and PB7 (SDA). I2C2 uses PD6 (SCL) and PD7 (SDA).

16. Q: Is there a dedicated clock input pin? A: Yes, the STM32F401CBU6 has an external clock input pin (XTI).

17. Q: Can I use the STM32F401CBU6 for USB communication? A: No, the STM32F401CBU6 does not have USB support in its configuration.

18. Q: Which pins are used for external interrupts? A: Most GPIO pins can be configured as external interrupts.

19. Q: Can I use the STM32F401CBU6 for motor control? A: Yes, it supports motor control using PWM on various GPIO pins connected to timers.

20. Q: What is the typical application of STM32F401CBU6? A: STM32F401CBU6 is widely used in applications such as industrial control, robotics, home automation, and sensor interface s due to its high-performance capabilities.

Conclusion

The STM32F401CBU6 is a powerful microcontroller from STMicroelectronics designed for a wide range of embedded applications. With 64 pins and extensive peripheral support, including ADC, SPI, USART, I2C, and more, this microcontroller is highly versatile and suitable for both simple and complex designs. Each pin can serve a variety of functions depending on the configuration, making it an excellent choice for development and prototyping.