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boards/stm32f746g-disco: extend documentation

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Alexandre Abadie 2021-12-01 15:55:59 +01:00
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boards/stm32f746g-disco/doc.txt
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* @ingroup boards
* @brief Support for the STM32F746G-DISCO board.
## Overview
The ST [STM32F746G-DISCO](https://www.st.com/en/evaluation-tools/32f746gdiscovery.html)
is an evaluation board supporting a ARM Cortex-M7 STM32F746NG microcontroller
with 340KB of RAM and 1MB of ROM Flash.
As main features, this board provides:
- a 4"3 RGB 480×272 color LCD-TFT with capacitive touch screen,
- an ethernet port
- 2 user USB ports (FS and HS)
- 2 user digital microphones
- 128M-bit external Quas-SPI flash
- 128M-bit external SDRAM
Current hardware support:
| Feature | Support | Configuration |
| ------------- | :---------------------: | --------------------- |
| UART | X | USART1 on PB7/PA9 (stdio) and USART6 on PC6/PC7 |
| SPI | X | SPI2 on PB15/PB14/PI1 |
| I2C | X | I2C1 on PB8/PB9 |
| Ethernet | X | |
| USB OTG FS | X | |
| USB OTG HS | - | |
| TFT LCD | - | |
| Capacitive touch screen | - | |
| User microphones | - | |
| External Quad-SPI Flash | - | |
| External SDRAM | - | |
## Flashing the device
The STM32F746G-DISCO board includes an on-board ST-LINK programmer and can be