# Padmelon board

## Specs (with Merlin Falcon SOC)

* Two 260-pin DDR4 SO-DIMM slots, 1.2V DDR4-1333/1600/1866/2133 SO-DIMMs
  Supports 4GB, 8GB and 16GB DDR4 unbuffered ECC (Merlin Falcon)SO-DIMMs
* Can use Prairie Falcon, Brown Falcon, Merlin Falcon, though coreboot
  code is specific for Merlin Falcon SOC. Some specs will change if not
  using Merlin Falcon.
* One half mini PCI-Express slot on back side of mainboard
* One PCI Express® 3.0 x8 slot
* Two SATA3 ports with 6Gb/s data transfer rate
* Two USB 2.0 ports at rear panel
* Two USB 3.0 ports at rear panel
* Dual Gigabit Ethernet from Realtek RTL8111F Gigabit controller
* 6-channel High-Definition audio from Realtek ALC662 codec
* One soldered down SPI flash with dediprog header

## Mainboard

![mainboard][padmelon]

Three items are marked in this picture
1. dediprog header
2. memory dimms, address 0xA0 and 0xA4
3. SATA cables connected to motherboard

## Back panel

![back panel][padmelon_io]

* The lower serial port is UART A (debug serial)

## Flashing coreboot

```eval_rst
+---------------------+--------------------+
| Type                | Value              |
+=====================+====================+
| Socketed flash      | no                 |
+---------------------+--------------------+
| Model               | Macronix MX256435E |
+---------------------+--------------------+
| Size                | 8 MiB              |
+---------------------+--------------------+
| Flash programing    | dediprog header    |
+---------------------+--------------------+
| Package             | SOIC-8             |
+---------------------+--------------------+
| Write protection    | No                 |
+---------------------+--------------------+
```

## Technology

```eval_rst
+---------------+------------------------------+
| Fan control   | Using fintek F81803A         |
+---------------+------------------------------+
| CPU           | Merlin Falcon (see reference)|
+---------------+------------------------------+
```

## Description of pictures within this document

```eval_rst
+----------------------------+----------------------------------------+
|padmelon.jpg                | Motherboard with components identified |
+----------------------------+----------------------------------------+
|padmelon_io.jpg             | Back panel picture                     |
+----------------------------+----------------------------------------+
```

## Reference

[Merlin Falcon BKDG][merlinfalcon]

[merlinfalcon]: ../../../soc/amd/family15h.md
[padmelon]: padmelon.jpg
[padmelon_io]: padmelon_io.jpg
