Merge pull request #21207 from dylad/pr/board/arduino_due/doctxt

boards/arduino-due: update doc.txt

boards/arduino-due/doc.txt

@@ -3,5 +3,59 @@
 @ingroup     boards
 @brief       Support for the Arduino Due board
 
-@see boards_common_arduino_due for details
+\section arduino_due Arduino-Due
+
+## Table of Contents {#arduino_due_toc}
+
+1. [Overview](#arduino_due_overview)
+2. [Hardware](#arduino_due_hardware)
+    1. [MCU](#atmel_sam3x8e_mcu)
+    2. [Board Configuration](#arduino_due_board_configuration)
+    3. [Board Pinout](#arduino_due_pinout)
+3. [Flashing the Device](#arduino_due_flashing)
+
+## Overview {#arduino_due_overview}
+
+The Arduino Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU.
+It is the first Arduino board based on a 32-bit ARM core microcontroller.
+
+\image html "https://store.arduino.cc/cdn/shop/files/A000062_00.front_1000x750.jpg" "Arduino Due board" width=750px
+
+## Hardware {#arduino_due_hardware}
+
+### MCU {#atmel_sam3x8e_mcu}
+
+The board features a SAM3X8E MCU (ARM Cortex-M3) running at up to 84MHz.
+It embeds 96 KiB of SRAM and 512 KiB of flash memory.
+The board reference manual is available [here](https://docs.arduino.cc/resources/datasheets/A000062-datasheet.pdf)
+and the MCU datasheet is available [here](https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11057-32-bit-Cortex-M3-Microcontroller-SAM3X-SAM3A_Datasheet.pdf).
+
+### Board configuration {#arduino_due_board_configuration}
+The Arduino Due provides the following features:
+- 54 I/Os (of which 12 PWM outputs)
+- 12 analog inputs
+- 4 UARTs
+- 1 USB OTG
+- 2 DAC outputs
+- 2 TWI
+- 1 power jack
+- 1 SPI header
+- 1 JTAG header
+- 2 CAN Buses
+- A reset button
+- An erase button
+
+### Board pinout {#arduino_due_pinout}
+
+\image html "https://content.arduino.cc/assets/Pinout-Due_latest.png" "Arduino Due pinout"
+
+The board schematics are available [here](https://docs.arduino.cc/resources/schematics/A000056-schematics.pdf).
+
+## Flashing the device {#arduino_due_flashing}
+Flashing RIOT on the Arduino Due is quite straight forward as it relies on
+the preinstalled arduino bootloader. Connect your board using the programming
+port to your host computer and type:
+
+`make BOARD=arduino-due flash`
+
  */