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  • clifflecliffle@hachyderm.io
    Oct 12, 2026, 3:24 AM

    Alright, I figured out some of the reasons why my display repaints are faster than others'. (Not everyone's -- there are some very fast demos on YouTube, source unavailable.)

    A meme appears to have spread that the ILI9488 doesn't support 16-bit color mode in 4-wire SPI mode, only 24-bit. So these applications are sending 50% more bits than I am.

    The meme seems to stem from an error in a diagram in the datasheet, but the datasheet _text_ says it's supported, and it's what I've always used.

    I wonder if I should send some PRs to people.

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  • Dion Dokterdiondokter@fosstodon.org
    Oct 12, 2026, 6:07 AM

    @cliffle goes to show again how important accurate docs are. A whole class of people now think this chip is worse than it is.

    How many chip sales have they squandered? We'll never know, but it's possible it's a lot

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  • clifflecliffle@hachyderm.io
    Oct 12, 2026, 3:05 PM

    @diondokter Maybe -- this chip is quite common in low-cost TFT panels, and I think a lot of people see "24 bit color" as a feature. I'm only forcing 16 bit color because I'm a giant performance nerd, and because of its maximum 20 MHz SPI rate.

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