board-st-nucleo-l031k6 - Wokwi

A Nucleo-32 development board with STM32L031K6 MCU: ARM Cortex-M0+ processor, 32 KB Flash, 8 KB RAM, 1 KB EEPROM running at 32 MHz.

Onboard LED

The Nucleo-L031K6 has an onboard user LED (LD3), attached to GPIO pin PB3 (D13). The LED is lit when the pin is driven high. You can also use the LED_BUILTIN constant to reference the LED in your Arduino code:

pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);

See Blink for a complete code example.

Simulation features

This table summarizes the current status of the STM32L031K6 MCU simulation features:

Feature	Status	Notes
Processor core	✔️	Cortex M0+ core
SysTick timer	✔️
EERPOM	✔️
GPIO	✔️
USART	✔️
I2C	✔️	Master mode only
SPI	✔️	Master mode only
ADC	✔️	Used by analogRead()
STM32 timers	✔️	TIM2/21/22, used by analogWrite()
Comparator	❌
CRC	✔️	32, 16, and 8 bits (7 bits not supported)
DBG	❌
DMA	❌
EXTI	✔️
IWDG	❌
LPTIM	❌	Low power timer
LPUART	❌	Low power USART
PWR	❌
RCC	✔️
RTC	❌
SYSCFG	🟡	Only EXTICRn registers
WWDG	🟡	Implemented, not tested yet
GDB Debugging	✔️	See the GDB Debugging guide

Legend:
✔️ Simulated
🟡 Partial implementation/work in progress
❌ Not implemented

Simulator examples