STM32L431RCT6 Detailed explanation of pin function specifications and circuit principle instructions

The STM32L431RCT6 is a microcontroller from the STM32L4 series by STMicroelectronics. The STM32L4 series is part of STM32's ARM Cortex-M4-based microcontrollers, offering low power consumption, high performance, and a wide range of peripheral interface s, ideal for applications like IoT, industrial control, and consumer electronics.

Packaging

The STM32L431RCT6 comes in a LQFP-64 package, which features 64 pins.

Detailed Pin Function Description for STM32L431RCT6 (LQFP-64)

Below is a comprehensive pinout and description for each pin of the STM32L431RCT6 in the LQFP-64 package.

Pin Number Pin Name Pin Function 1 PA13 (SWDIO) Serial Wire Debug I/O. This is the data line for debugging communication. 2 PA14 (SWCLK) Serial Wire Debug Clock . This is the clock line for debugging communication. 3 PA15 (NJTRST) NJTRST Pin. This is the JTAG Test Reset, used for JTAG debugging. 4 PB3 I2C1SCL, SPI1SCK, or PWM output (depending on the configuration). This is the serial clock for I2C1 or SPI1, or a PWM signal. 5 PB4 I2C1SDA, SPI1MISO, or PWM output. This is the serial data line for I2C1 or SPI1, or a PWM signal. 6 PB5 SPI1MOSI, CAN1RX. This is the Master Out Slave In line for SPI1 or CAN receive. 7 PB6 I2C1SCL, SPI2SCK, or PWM output. This is the serial clock for I2C1 or SPI2, or a PWM signal. 8 PB7 I2C1SDA, SPI2MISO, or PWM output. This is the serial data line for I2C1 or SPI2, or a PWM signal. 9 PC0 Analog Input, USART2_TX, or PWM output. 10 PC1 Analog Input, USART2_RX, or PWM output. 11 PC2 Analog Input, USART2_CK, or PWM output. 12 PC3 Analog Input, USART2_RTS, or PWM output. 13 PC4 Analog Input, USART2_CTS, or PWM output. 14 PC5 SPI1SCK, SPI3SCK, or PWM output. 15 PC6 USART1TX, SPI2MISO, or PWM output. 16 PC7 USART1RX, SPI2MOSI, or PWM output. 17 PD0 Analog Input, USART3_TX, or PWM output. 18 PD1 Analog Input, USART3_RX, or PWM output. 19 PD2 Analog Input, USART3_CK, or PWM output. 20 PD3 Analog Input, USART3_RTS, or PWM output. 21 PD4 Analog Input, USART3_CTS, or PWM output. 22 PD5 SPI3SCK, I2S2CK, or PWM output. 23 PD6 SPI3MISO, I2S2SD, or PWM output. 24 PD7 SPI3MOSI, I2S2WS, or PWM output. 25 PD8 USART1TX, SPI1SCK, or PWM output. 26 PD9 USART1RX, SPI1MISO, or PWM output. 27 PD10 CAN1TX, SPI1MOSI, or PWM output. 28 PD11 CAN1RX, SPI1MISO, or PWM output. 29 PD12 Analog Input, SPI2_MISO, or PWM output. 30 PD13 Analog Input, SPI2_MOSI, or PWM output. 31 PD14 Analog Input, SPI2_SCK, or PWM output. 32 PD15 Analog Input, SPI2_NSS, or PWM output. 33 PE0 Analog Input, TIM4_CH1, or PWM output. 34 PE1 Analog Input, TIM4_CH2, or PWM output. 35 PE2 Analog Input, TIM4_CH3, or PWM output. 36 PE3 Analog Input, TIM4_CH4, or PWM output. 37 PE4 Analog Input, TIM5_CH1, or PWM output. 38 PE5 Analog Input, TIM5_CH2, or PWM output. 39 PE6 Analog Input, TIM5_CH3, or PWM output. 40 PE7 Analog Input, TIM5_CH4, or PWM output. 41 PE8 Analog Input, TIM1_CH1, or PWM output. 42 PE9 Analog Input, TIM1_CH2, or PWM output. 43 PE10 Analog Input, TIM1_CH3, or PWM output. 44 PE11 Analog Input, TIM1_CH4, or PWM output. 45 PE12 Analog Input, TIM1_ETR, or PWM output. 46 PE13 Analog Input, TIM8_CH1, or PWM output. 47 PE14 Analog Input, TIM8_CH2, or PWM output. 48 PE15 Analog Input, TIM8_CH3, or PWM output. 49 PF0 Analog Input, TIM8_CH4, or PWM output. 50 PF1 Analog Input, TIM8_ETR, or PWM output. 51 PF2 Analog Input, TIM2_CH1, or PWM output. 52 PF3 Analog Input, TIM2_CH2, or PWM output. 53 PF4 Analog Input, TIM2_CH3, or PWM output. 54 PF5 Analog Input, TIM2_CH4, or PWM output. 55 PF6 Analog Input, TIM3_CH1, or PWM output. 56 PF7 Analog Input, TIM3_CH2, or PWM output. 57 PF8 Analog Input, TIM3_CH3, or PWM output. 58 PF9 Analog Input, TIM3_CH4, or PWM output. 59 PF10 Analog Input, TIM4_CH1, or PWM output. 60 PF11 Analog Input, TIM4_CH2, or PWM output. 61 PF12 Analog Input, TIM4_CH3, or PWM output. 62 PF13 Analog Input, TIM4_CH4, or PWM output. 63 PF14 Analog Input, TIM5_CH1, or PWM output. 64 PF15 Analog Input, TIM5_CH2, or PWM output.

FAQs for STM32L431RCT6

What is the function of pin PA13 on the STM32L431RCT6? PA13 is used for the Serial Wire Debug I/O (SWDIO), which is part of the debug interface. What is the function of pin PA14 on the STM32L431RCT6? PA14 is used for the Serial Wire Debug Clock (SWCLK), which provides the clock for debug communication. Can I use pin PA15 as a general-purpose I/O pin? PA15 can be used as a general-purpose I/O pin, but it is typically configured as NJTRST for JTAG reset. What is the default function of pin PB3? PB3 is configured as I2C1SCL by default but can also be used for SPI1SCK or PWM output. What is the alternate function of pin PB4? PB4 is typically used as I2C1SDA, but it can also serve as SPI1MISO or a PWM output. What is the maximum current rating for the I/O pins on STM32L431RCT6? The maximum current for I/O pins on the STM32L431RCT6 is typically 25 mA per pin. Can I configure PB5 for CAN1_RX communication? Yes, PB5 can be used as CAN1_RX (CAN receive) for communication. How many PWM channels are available on STM32L431RCT6? STM32L431RCT6 supports multiple PWM channels across several timers, including TIM1, TIM2, TIM3, TIM4, and TIM5. What is the voltage range for the I/O pins? The voltage range for I/O pins is typically 0V to 3.6V, depending on the specific configuration.

Can STM32L431RCT6 support USB communication?

No, STM32L431RCT6 does not have native USB functionality, but it supports many other communication interfaces like UART, SPI, I2C, and CAN.

Is there a dedicated reset pin on the STM32L431RCT6?

Yes, PA13 (SWDIO) is shared with the reset functionality, and pin PA15 is dedicated for the JTAG reset.

What are the clock sources available for the STM32L431RCT6?

STM32L431RCT6 supports multiple clock sources, including internal RC oscillators and external crystals.

Can I use pin PD6 as a general-purpose I/O?

Yes, PD6 can be configured as a general-purpose I/O, although it may be used as SPI3_MISO or PWM output in some configurations.

What are the supported communication protocols?

STM32L431RCT6 supports UART, SPI, I2C, CAN, and other peripherals.

How can I configure the I/O pins for analog inputs?

You can configure pins like PA0, PA1, etc., as analog inputs for ADC functionality.

What is the maximum clock frequency for STM32L431RCT6?

The maximum clock frequency is 80 MHz.

How do I configure the timers for PWM output on STM32L431RCT6?

You can configure the timers (e.g., TIM1, TIM2) in PWM mode by setting appropriate registers for the desired frequency and duty cycle.

Does STM32L431RCT6 support DMA?

Yes, STM32L431RCT6 has Direct Memory Access (DMA) for data transfer and peripheral management.

Can STM32L431RCT6 operate in low-power modes?

Yes, STM32L431RCT6 supports various low-power modes, including Sleep, Stop, and Standby modes.

How do I program STM32L431RCT6?

STM32L431RCT6 can be programmed using JTAG/SWD interfaces and STM32 programming tools.

This is just a starting point; you can refer to the STM32L431RCT6 datasheet for more specific, detailed information on the pinout and features.