STM32L031K6 Microcontroller

STM32L031K6 Microcontroller Overview

• Ultra-low-power platform
  • 1.65 V to 3.6 V power supply
  • -40 to 125 °C temperature range
  • 0.25 μA Standby mode (2 wakeup pins)
  • 0.38 μA Stop mode (16 wakeup lines)
  • 0.68 μA Stop mode + RTC + 8 KB RAM retention
  • Down to 76 μA/MHz in Run mode
  • 5 μs wakeup time (from Flash memory)
  • 41 μA 12-bit ADC conversion (at 10ksps)
• Core: ARM® 32-bit Cortex®-M0+
  • From 32 kHz up to 32 MHz max.
  • 0.95 DMIPS/MHz
  • Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds
  • Ultralow power POR/PDR
  • Programmable voltage detector (PVD)
• Clock sources
  • 1 to 25 MHz crystal oscillator
  • 32 kHz oscillator for RTC with calibration
  • High speed internal 16 MHz factory-trimmed RC (+/- 1%)
  • Internal low-power 37 kHz RC
  • Internal multispeed low-power 65 kHz to 4.2 MHz RC
  • PLL for CPU clock
• Pre-programmed bootloader
  • USART, SPI supported
• Development support
  • Serial wire debug supported
• Up to 38 fast I/Os (31 I/Os 5V tolerant)
• Memories
  • Up to 32 KB Flash with ECC
  • 8 KB RAM
  • 1 KB of data EEPROM with ECC
  • 20-byte backup register
  • Sector protection against R/W operation
• Rich Analog peripherals
  • 12-bit ADC 1.14 Msps up to 10 channels (down to 1.65 V)
  • 2x ultra-low-power comparators (window mode and wake up capability, down to 1.8 V)
• 7-channel DMA controller, supporting ADC, SPI, I2C, USART, Timers
• 5x peripherals communication interface
• 1x USART (ISO 7816, IrDA), 1x UART (low power)
• 1x SPI 16 Mbits/s
• 1x I2C (SMBus/PMBus)
• 8x timers: 1x 16-bit with up to 4 channels, 2x 16-bit with up to 2 channels, 1x 16-bit ultra-low-power timer, 1x SysTick, 1x RTC and 2x watchdogs (independent/window)
• CRC calculation unit, 96-bit unique ID
• All packages are ECOPACK®2

STM32L031K6 block diagram

STM32L031K6 clock tree

Documents and files

Datasheet
Specifications
Getting started
Reference manual
Programming manual
Errata
Getting started with STM32F0 or STM32L0 series
Virtually increasing the number of serial communication peripherals in STM32 applications
Guidelines to increase the number of touch sensing touchkeys

Pinout

Alternate function mapping

Alternate Functions for available pins on chip

Pin	AF0	AF1	AF2	AF3	AF4	AF5	AF6	AF7	Additional functions
PA0		USART1_CTS	TIM2_CH1_ETR						ADC_IN0 RTC_TAMP2 WKUP1
PA1	EVENTOUT	USART1_RTS	TIM2_CH2						ADC_IN1
PA2		USART1_TX	TIM2_CH3						ADC_IN2
PA3		USART1_RX	TIM2_CH4						ADC_IN3
PA4	SPI1_NSS I2S1_WS	USART1_CK			TIM14_CH1				ADC_IN4
PA5	SPI1_SCK I2S1_CK		TIM2_CH1_ETR						ADC_IN5
PA6	SPI1_MISO I2S1_MCK	TIM3_CH1	TIM1_BKIN			TIM16_CH1	EVENTOUT		ADC_IN6
PA7	SPI1_MOSI I2S1_SD	TIM3_CH2	TIM1_CH1N		TIM14_CH1	TIM17_CH1	EVENTOUT		ADC_IN7
PA8	MCO	USART1_CK	TIM1_CH1	EVENTOUT
PA9		USART1_TX	TIM1_CH2		I2C1_SCL
PA10	TIM17_BKIN	USART1_RX	TIM1_CH3		I2C1_SDA
PA11	EVENTOUT	USART1_CTS	TIM1_CH4
PA12	EVENTOUT	USART1_RTS	TIM1_ETR
PA13	SWDIO	IR_OUT
PA14	SWCLK	USART1_TX
PA15	SPI1_NSS I2S1_WS	USART1_RX	TIM2_CH1_ETR	EVENTOUT
PB0	EVENTOUT	TIM3_CH3	TIM1_CH2N						ADC_IN8
PB1	TIM14_CH1	TIM3_CH4	TIM1_CH3N						ADC_IN9
PB2
PB3	SPI1_SCK I2S1_CK	EVENTOUT	TIM2_CH2
PB4	SPI1_MISO I2S1_MCK	TIM3_CH1	EVENTOUT
PB5	SPI1_MOSI I2S1_SD	TIM3_CH2	TIM16_BKIN	I2C1_SMBA
PB6	USART1_TX	I2C1_SCL	TIM16_CH1N
PB7	USART1_RX	I2C1_SDA	TIM17_CH1N
PF0									OSC_IN
PF1									OSC_OUT

NUCLEO-L031K6 development Board Overview

Front	Back	Dimentions

Packaging literature

Front	Back

Features

• STM32 microcontrollers in 32-pin packages
• Extension with Arduino™ nano connectivity
• ARM® mbed™ -enabled (see http://mbed.org)
• On-board ST-LINK/V2-1 debugger/programmer with SWD connector:
  • USB VBUS
  • External source
• Three LEDs:
  • USB communication (LD1), power LED (LD2), user LED (LD3)
• Reset push-button
• Supported by wide choice of Integrated Development Environments (IDEs) including IAR™ , Keil® , GCC-based IDEs (AC6 SW4STM32, ...)

Documents and files

Specifications
Getting started with STM32 Nucleo board software development tools
User manual
Schematic

Board Layout

Top	Bottom

Pinout

Available pins on board

Available pins on board

Bit

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Port A

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

Port B

PB0

PB1

PB3

PB4

PB5

PB6

PB7

Port F

PF0

PF1

PCB IO map

IO connections

STM32 pin	Board pin name	Board pin number	Direction	Connected to	Alternate functions	Notes
PA0	A0	CN4.12	↔	?	ADC_IN0
PA1	A1	CN4.11	↔	?	ADC_IN1
PA2	A7	CN4.5	→	VCP TX	ADC_IN2
PA3	A2	CN4.10	↔	?	ADC_IN3
PA4	A3	CN4.9	↔	?	ADC_IN4
PA5	A4	CN4.8	↔	?	ADC_IN5 I2C1_SDA	Limitations on A4 and A5, D4 and D5 related to I2C configuration are explained in Section 6.8: Solder bridges according to SB16/SB18 setting.
PA6	A5	CN4.7	↔	?	ADC_IN6 I2C1_SCL	Limitations on A4 and A5, D4 and D5 related to I2C configuration are explained in Section 6.8: Solder bridges according to SB16/SB18 setting.
PA7	A6	CN4.6	↔	?	ADC_IN7
PA8	D9	CN3.12	↔	?	TIM1_CH1
PA9	D1	CN3.1	→	?	USART1_TX	Only one USART is available and it is shared between Arduino Nano and VCP. The selection is done by remapping (no need to change the hardware configuration).
PA10	D0	CN3.2	←	?	USART1_RX	Only one USART is available and it is shared between Arduino Nano and VCP. The selection is done by remapping (no need to change the hardware configuration).
PA11	D10	CN3.13	↔	?	SPI_CS TIM1_CH4	SPI_CS is made by GPIO.
PA12	D2	CN3.5	↔	?
PB0	D3	CN3.6	↔	?	TIM3_CH3 ADC_IN8 ?
PB1	D6	CN3.9	↔	?	TIM14_CH1 ADC_IN9 ?
PB3	D13	CN4.15	↔	LED green	SPI1_SCK
PB4	D12	CN3.15	↔	?	SPI1_MISO
PB5	D11	CN3.14	↔	?	SPI1_MOSI TIM3_CH2
PB6	D5	CN3.8	↔	?	TIM16_CH1N	D5 PWM on inverted channel Timer 16.
PB7	D4	CN3.7	↔	?
PF0	D7	CN3.10	↔	?		D7/D8 shared with OSC_IN/OSC_OUT.
PF1	D8	CN3.11	↔	?		D7/D8 shared with OSC_IN/OSC_OUT.