melonHD

WARNING: MelonHD does NOT work with traditional HDMI™ sources out of the box. It does not expose the DDC pins for EDID and does not connect to the HDMI™ HPD pin.

MelonHD is intended for DIY video game console portablizing, with non-traditional HDMI™ sources such as GCVideo DVI, and is NOT a general-purpose HDMI™ to USB-C DP Alt Mode converter.

Add USB-C video output to your portable with melonHD! Converts HDMI™ to USB-C DP Alt Mode using a Lontium LT6711A, with pin-strappable VBUS PDO selection (5V, 9V, 12V, 15V)

• Tiny 17 x 13mm 0.8mm-thick castellated PCB
• 480p - 2160p (4K) HDMI™ 2.0 input and USB-C DP 1.2 Alt Mode output
• Pin-strappable VBUS PDO selection: 5V/3A, 9V/3A, 12V/3A, or 15V/3A
• Powered directly from 5V - 15V VBUS with onboard voltage regulators
• HPD (hotplug detect) output pin: high for DP Alt Mode contracts, low for power-only contracts
  

To integrate melonHD into your project, you must solder it to an impedance-controlled 4-layer carrier PCB. An open source carrier board reference design is available in the GitHub repository.

NOTE: The melonHD module does not expose DDC pins for EDID and does not connect to HPD (HDMI™ pin 19) like a normal HDMI™ sink. As such, compatibility with desktop PCs and other HDMI™ sources which rely on EDID/HPD is not guaranteed. melonHD is intended for integration into portables using GCVideo, DCDigital, Retro GEM, and other HDMI™ mods which do not care about EDID or HPD.

Advanced users could add additional circuitry like an EDID EEPROM and HPD spoof circuitry to potentially work around these limitations, but this is not an intended usecase for melonHD, so I can't provide technical support for it. If you need a general purpose HDMI™ to USB-C DP Alt Mode converter, contact Lontium overseas sales. Familiarity with the HDMI™ and USB-C PD spec is mandatory.

NOTE: melonHD works best when it receives an HDMI™ signal after power-up. melonHD exposes an HPD pin to accommodate this; HPD goes high once a DP Alt Mode contract is established. See this forum post for a breakdown on how to power-gate an HDMI mod such as GCVideo DVI with HPD.

melonHD is an advanced mod and is not recommended for beginners. 

Manufactured and assembled by PCBWay.

Source: https://github.com/mackieks/melonHD

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