Hey there!
there are a variety of boards based on the F1C100s/F1C200s processor, and I am currently working on designing my own. The datasheet shows that the processor offers several display output options, including a Parallel RGB interface with resolutions up to 1280x720@60fps.
![](https://i.imgur.com/oEJx1jO.png)
However, I don't plan to connect a display directly, but am considering integrating an alternate output. The F1C200s does offer a TV composite output that I could theoretically use, but so far I haven't seen anyone actually use this feature in their board design. Also, I'm unsure if Linux supports this output as a display, especially given Allwinner's lack of documentation. In addition, the quality of a composite signal is not comparable to a clear digital signal, and three jacks (2 for stereo audio and 1 for video + an amplifier circuit for the audio) takes up a lot of space on the board.
So I am considering integrating HDMI with an HDMI transmitter IC like the Sil9022. However, I wonder if this would actually work. A first look at the datasheet of the Sil9022 shows that it supports a 1280x720@60fps signal as input.
![](https://i.imgur.com/Gaw6ofe.png)
I2S audio is also supported by both ICs. However, the F1C100s is not very powerful and does not even have a GPU let alone an FPU. In addition, I'm also interested to know if any public schematics based on the Sil9022 exist, as I personally haven't found any.
I am aware that my board will probably not be any more compact than a Raspberry Pi Zero and will definitely offer fewer features (and thus be pretty useless). Still, the idea of having a chip output HDMI without a dedicated GPU fascinates me. I think it could be an exciting design challenge.
What are your thoughts on this? Can anyone help me with some information?
Many thanks in advance!