Burning Firmware onto PCB800862

PCB800862 is an RTD2556 based controller board. Features include:

• USB C input
• HDMI input (mimi HDMI/HDMI C connector)
• Audio output
• USB hub
• PD charging
• Supports up to 1920x1200 supposedly, although I have not been able to get it work on my panel.

See the files section for the specs (in poorly written Chinese, don't blame Google translate). This log probably applies to other RTD based boards as well. But I haven't verified.

Programmer Hardware

I am using this ISP programmer from AliExpress. There are some DIY versions based on Raspberry Pi floating on the Internet. I haven't tried any. Leave a comment if any has worked for you.

The programmer communicates with the controller board using I2C over the VGA, HDMI, or DVI connector. I have only used the HDMI.

Programmer Software

I got the software from the vendor who sold me the programmer. It runs only on Windows. I was worried that it wouldn't run on Windows 11 but it seemed to work fine.

See the files section for the software bundle.

Firmware

I got the firmware pack from the vendor too. They made it sound like it works for PCB800860, PCB800862, and PCB800863. I only have a PCB800862 to verify.

See the files section for the firmware pack.

Notes

Verified working:

• 1920x1080 2-ch 6-bit
• 1366x768 1-ch 6-bit

Did not work:

• 1920x1200 2-ch 8-bit, at least not on CLAA260WU11