WeAct-MiniH750-LTDC expansion board

This project is an expansion board for the H750Mini core board of Weihang Studio. It extends the LTDC function based on the original core board and can be used to drive RGB-TFT screens. At the same time, an RTC backup battery is added to the core board.

The expansion board is equipped with an LED backlight circuit and an XPT2046 touch screen driver circuit, which can directly drive a standard 40-pin RGB bare screen without the need for an additional expansion board.

Precautions:

• The two sets of jumpers JP1, JP2 and JP3, JP4 need to be short-circuited at least one set, and it is not recommended to leave them unconnected.
• If the TFT screen is not connected when powering on, or the screen is accidentally disconnected during normal operation, the backlight circuit will automatically enter the protection mode. At this time, you need to wait for at least 20 minutes after powering off to release the protection. Or you can manually short C8 to immediately release the protection mode.
• When using the LTDC function, the DCMI interface on the original core board cannot be used at the same time.
• The backlight circuit can drive up to 5-inch 800x480 RGB-TFT screen

Physical picture

Front view

Rear view

What it looks like after being combined with the core board

Can directly drive the bare screen with standard 40PinRGB interface

Core board picture