STM32L431CBT6 Detailed explanation of pin function specifications and circuit principle instructions

STM32L431CBT6 Detailed explanation of pin function specifications and circuit principle instructions

The model you referred to, "STM32L431CBT6," is from the STM32 family of microcontrollers, developed by STMicroelectronics. This microcontroller is based on the ARM Cortex-M4 processor. It is specifically designed for low- Power applications, offering various features suitable for energy-efficient projects.

Key Information:

Brand: STMicroelectronics Model: STM32L431CBT6 Core: ARM Cortex-M4 Packaging: LQFP (Low-Profile Quad Flat Package) Pin Count: 32 Pins (32-pin version)

Pinout and Detailed Pin Function Specifications

Here is a detailed description of the pins for STM32L431CBT6 (LQFP package, 32 pins). Each pin has multiple potential functions, depending on your application's requirements. The descriptions will cover various input/output functions, voltage levels, and peripheral mappings.

Pin Number Pin Name Function Description 1 VDD Power supply voltage (3.3V typical) 2 VSS Ground pin 3 NRST Reset pin (Active low) 4 PA0 GPIO, ADC1IN0, TIM2CH1, EXTI0, CAN_RX 5 PA1 GPIO, ADC1IN1, TIM2CH2, EXTI1, CAN_TX 6 PA2 GPIO, ADC1IN2, USART2TX, EXTI2 7 PA3 GPIO, ADC1IN3, USART2RX, EXTI3 8 PA4 GPIO, SPI1NSS, TIM3CH1, EXTI4 9 PA5 GPIO, SPI1SCK, TIM2CH1, EXTI5 10 PA6 GPIO, SPI1MISO, TIM3CH2, EXTI6 11 PA7 GPIO, SPI1MOSI, TIM3CH3, EXTI7 12 PB0 GPIO, ADC1IN8, TIM3CH3, EXTI8 13 PB1 GPIO, ADC1IN9, TIM3CH4, EXTI9 14 PB2 GPIO, TIM3_CH1, EXTI10 15 PB3 GPIO, TIM3_CH2, EXTI11 16 PB4 GPIO, TIM2_CH4, EXTI12 17 PB5 GPIO, SPI1SCK, TIM2CH1, EXTI13 18 PB6 GPIO, I2C1SCL, TIM4CH1, EXTI14 19 PB7 GPIO, I2C1SDA, TIM4CH2, EXTI15 20 PC13 GPIO, EXTI17 21 PC14 GPIO, EXTI18 22 PC15 GPIO, EXTI19 23 VCAP capacitor for internal voltage regulator 24 VDDA Analog power supply (3.3V) 25 VSSA Analog ground 26 PA8 GPIO, MCO, TIM1_CH1, EXTI8 27 PA9 GPIO, USART1TX, TIM1CH2, EXTI9 28 PA10 GPIO, USART1RX, TIM1CH3, EXTI10 29 PA11 GPIO, USART1CK, TIM1CH4, EXTI11 30 PA12 GPIO, USART1CTS, TIM1ETR, EXTI12 31 PA13 GPIO, SWDIO, EXTI13 32 PA14 GPIO, SWCLK, EXTI14

Pinout Summary:

The STM32L431CBT6 microcontroller comes with 32 pins in total. Pin functions include general-purpose I/O (GPIO), analog-to-digital conversion (ADC), digital communication peripherals (USART, SPI, I2C), and various timer channels (TIM). VDD and VSS are power pins, while VDDA and VSSA are specifically used for the analog section of the device.

FAQ: 20 Common Questions

What is the voltage supply for STM32L431CBT6? The operating voltage is typically 3.3V (can range from 2.0V to 3.6V). What is the function of the NRST pin? The NRST pin is used to reset the microcontroller. It is active low. How many pins does STM32L431CBT6 have? This model has a 32-pin configuration. What are the functions of PA0 and PA1 pins? PA0 and PA1 are used for GPIO, ADC1IN0, TIM2CH1, EXTI0, CANRX, and CANTX. Can I use the PA5 pin for SPI communication? Yes, PA5 can be used for SPI1SCK as well as TIM2CH1. What is the purpose of VCAP pin? VCAP is used for a capacitor connected to the internal voltage regulator to ensure stability. Which pins are used for I2C communication? PB6 (I2C1SCL) and PB7 (I2C1SDA) are used for I2C communication. What timer functionalities are supported by STM32L431CBT6? The microcontroller supports several timers, including TIM2, TIM3, and TIM4 for PWM, input capture, and output compare. Does STM32L431CBT6 support UART? Yes, the model supports USART1 and USART2 for UART communication. How can I use PA8 for output? PA8 is used for MCO, which is the microcontroller output Clock . Is it possible to use STM32L431CBT6 for ADC applications? Yes, the microcontroller supports 12-bit ADC functionality through various pins such as PA0 to PA7 and PB0 to PB1. What is the purpose of VDDA pin? VDDA is the power supply for the analog section of the chip. Can I use PA14 for debugging? Yes, PA14 is used for the SWCLK (Serial Wire Clock) pin for debugging purposes. How many external interrupts are available on STM32L431CBT6? The microcontroller provides external interrupts on PA0 through PA15, PB0 through PB7, and PC13 through PC15. What is the maximum frequency of STM32L431CBT6? The maximum clock frequency of this microcontroller is 80 MHz. Can I use STM32L431CBT6 for low-power applications? Yes, the STM32L431 series is optimized for low-power consumption, making it suitable for battery-powered applications. What peripherals are available on STM32L431CBT6? Peripherals include USART, I2C, SPI, ADC, PWM, and Timers. What is the STM32L431CBT6's built-in flash memory capacity? The microcontroller has 128KB of flash memory. How do I handle power-down modes? STM32L431CBT6 supports various low-power modes such as Sleep Mode, Stop Mode, and Standby Mode to save power. What is the role of VSSA pin? VSSA is the ground pin for the analog section of the microcontroller.

This covers the detailed pin function specifications and answers to 20 common questions related to the STM32L431CBT6 microcontroller. Let me know if you need more details or further clarification!