# B-L475E-IOT01A IoT Node (`b-l475e-iot01a`)

The B-L475E-IOT01A IoT Node uses the STM32L475VG SoC which is based on ARM Cortex-M4F core. It is part of STMicroelectronics STM32 boards and more specifically the STM32L4 ultra-low power series. The STM32L4x5 chip runs at up to 80 MHz and integrates 128 KiB of SRAM and up to 1MiB of Flash. The B-L475E-IOT01A board namely features 64 Mibit QSPI Flash, BT, WiFi and RF connectivity, USART, I2C, SPI, CAN and USB OTG, as well as a variety of sensors.

## Supported devices

Currently B-L475E-IOT01A machine’s only supports the following devices:

- Cortex-M4F based STM32L4x5 SoC

- STM32L4x5 EXTI (Extended interrupts and events controller)

- STM32L4x5 SYSCFG (System configuration controller)

- STM32L4x5 RCC (Reset and clock control)

- STM32L4x5 GPIOs (General-purpose I/Os)

## Missing devices

The B-L475E-IOT01A does not support the following devices:

- Serial ports (UART)

- Analog to Digital Converter (ADC)

- SPI controller

- Timer controller (TIMER)

See the complete list of unimplemented peripheral devices in the STM32L4x5 module : `./hw/arm/stm32l4x5_soc.c`

## Boot options

The B-L475E-IOT01A machine can be started using the `-kernel` option to load a firmware. Example:

    $ qemu-system-arm -M b-l475e-iot01a -kernel firmware.bin