The STM32L031K6T6 is part of the STM32 series, which is produced by STMicroelectronics, a well-known semiconductor manufacturer. It is a low- Power , 32-bit microcontroller based on the ARM Cortex-M0+ core.
Here’s a detailed explanation regarding the pin functions, pinout, and circuit principles for the STM32L031K6T6:
Package and Pinout Information
The STM32L031K6T6 is housed in a LQFP-32 (Low-profile Quad Flat Package with 32 pins).
Pinout Table:Here’s the list of all pins and their functions in a table format:
Pin Number Pin Name Function Description 1 VSS Ground pin 2 VDD Power supply (2.1V to 3.6V) 3 NRST Reset pin, used to reset the microcontroller 4 PA13 SWDIO (Serial Wire Debug I/O), or GPIO pin (General-purpose I/O) 5 PA14 SWCLK (Serial Wire Clock ), or GPIO pin 6 PA15 USART1_CK (USART 1 Clock), or GPIO pin 7 PB3 USART1_TX (USART 1 Transmit), or GPIO pin 8 PB4 USART1_RX (USART 1 Receive), or GPIO pin 9 PB5 SPI1_SCK (SPI1 Clock), or GPIO pin 10 PB6 SPI1_MISO (SPI1 Master In Slave Out), or GPIO pin 11 PB7 SPI1_MOSI (SPI1 Master Out Slave In), or GPIO pin 12 PB8 I2C1_SCL (I2C1 Clock), or GPIO pin 13 PB9 I2C1_SDA (I2C1 Data), or GPIO pin 14 PA8 MCO (Microcontroller Clock Output), or GPIO pin 15 PA9 USART1_TX (USART 1 Transmit), or GPIO pin 16 PA10 USART1_RX (USART 1 Receive), or GPIO pin 17 PA11 USART1_CTS (USART 1 Clear to Send), or GPIO pin 18 PA12 USART1_RTS (USART 1 Request to Send), or GPIO pin 19 PC13 GPIO pin 20 PC14 USBFSDP (USB Full Speed Data Positive), or GPIO pin 21 PC15 USBFSDM (USB Full Speed Data Negative), or GPIO pin 22 PD0 GPIO pin 23 PD1 GPIO pin 24 PD2 GPIO pin 25 PD3 GPIO pin 26 PD4 GPIO pin 27 PD5 GPIO pin 28 PD6 GPIO pin 29 PD7 GPIO pin 30 PD8 GPIO pin 31 PD9 GPIO pin 32 PD10 GPIO pin20 FAQ (Frequently Asked Questions)
Q1: What are the power supply voltage requirements for the STM32L031K6T6? A1: The STM32L031K6T6 requires a power supply voltage between 2.1V and 3.6V for operation.
Q2: What is the purpose of the NRST pin? A2: The NRST pin is the reset pin, used to reset the microcontroller to its default state.
Q3: Can I use the PA13 and PA14 pins for regular GPIO functions? A3: Yes, PA13 and PA14 can be used as general-purpose I/O pins, but they also support SWDIO and SWCLK functions for debugging.
Q4: What functions can the PA15 pin be used for? A4: PA15 can function as USART1_CK or as a regular GPIO pin.
Q5: How many UART interface s are available in STM32L031K6T6? A5: The STM32L031K6T6 provides one UART interface (USART1) available on PA9, PA10, PA11, and PA12.
Q6: Which pins are used for SPI communication? A6: Pins PB5 (SPI1SCK), PB6 (SPI1MISO), and PB7 (SPI1_MOSI) are used for SPI communication.
Q7: Can I use the PB8 and PB9 pins for I2C? A7: Yes, PB8 is I2C1SCL (Clock) and PB9 is I2C1SDA (Data) for I2C communication.
Q8: How many GPIO pins are available in STM32L031K6T6? A8: There are a total of 32 pins in the LQFP-32 package. Of these, several can be configured as GPIO pins.
Q9: What are the available clock output options on the STM32L031K6T6? A9: PA8 can be used to output the microcontroller clock (MCO).
Q10: Does the STM32L031K6T6 support USB? A10: Yes, it supports USB functionality with pins PC14 (USBFSDP) and PC15 (USBFSDM) for USB Full Speed.
Q11: Can I configure all pins as regular GPIOs? A11: Many of the pins can be configured as GPIOs, but some are dedicated to specialized functions like UART, SPI, I2C, or USB.
Q12: How is the reset functionality triggered? A12: The reset is triggered by pulling the NRST pin low, which forces the microcontroller into a reset state.
Q13: Is there any special configuration for using the USART1TX and USART1RX pins? A13: These pins (PA9 for TX and PA10 for RX) are used for USART
