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boards/nucleo-l031k6: improve board doc #21790

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43 changes: 31 additions & 12 deletions boards/nucleo-l031k6/doc.md
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Expand Up @@ -7,16 +7,35 @@
The Nucleo-L031K6 is a board from ST's Nucleo family supporting ARM Cortex-M0
STM32L031K6T6 microcontroller with 8KiB of RAM and 32KiB of Flash.

## Pinout

## Flashing the Board Using ST-LINK Removable Media

On-board ST-LINK programmer provides via composite USB device removable media.
Copying the HEX file causes reprogramming of the board. This task
could be performed manually; however, the cpy2remed (copy to removable
media) PROGRAMMER script does this automatically. To program board in
this manner, use the command:
```
make BOARD=nucleo-l031k6 PROGRAMMER=cpy2remed flash
```
@note This PROGRAMMER was tested using ST-LINK firmware 2.37.26. Firmware updates
can be found on [this STM webpage](https://www.st.com/en/development-tools/stsw-link007.html).
@image html pinouts/nucleo-l432kc-and-more.svg "Pinout for the Nucleo-L031K6 (from STM user manual, UM1956, https://www.st.com/resource/en/user_manual/um1956-stm32-nucleo32-boards-mb1180-stmicroelectronics.pdf, page 32)" width=25%

### MCU

| MCU | STM32L031K6 |
|:---------- |:------------------- |
| Family | ARM Cortex-M0+ |
| Vendor | ST Microelectronics |
| RAM | 8KiB |
| Flash | 32KiB |
| Frequency | up to 32MHz |
| FPU | no |
| Timers | 8 (4x 16-bit, 1x RTC, 1x Systick, 2x Watchdog) |
| ADC | 1x 12-bit (10 channels) |
| UARTs | 2 (one USART and one Low-Power UART) |
| SPIs | 2 |
| CANs | 0 |
| RTC | 1 |
| I2Cs | 1 |
| Vcc | 1.65V - 3.6V |
| Datasheet | [Datasheet](https://www.st.com/resource/en/datasheet/stm32l031k6.pdf) |
| Reference Manual | [Reference Manual](https://www.st.com/resource/en/reference_manual/rm0377-ultralowpower-stm32l0x1-advanced-armbased-32bit-mcus-stmicroelectronics.pdf) |
| Programming Manual | [Programming Manual](https://www.st.com/resource/en/programming_manual/pm0223-stm32-cortexm0-mcus-programming-manual-stmicroelectronics.pdf) |
| Board Manual | [Board Manual](https://www.st.com/resource/en/user_manual/um1956-stm32-nucleo32-boards-mb1180-stmicroelectronics.pdf) |

## Flashing the Board

A detailed description about the flashing process can be found on the
[guides page](https://guide.riot-os.org/board_specific/stm32/).
The board name for the Nucleo-L031K6 is `nucleo-l031k6`.