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Adafruit 1.69" 280x240 Round Rectangle Color IPS TFT Display - ST7789

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Don't be such a square - throw a curveball into your electronics with a curved-edge miniature display. Here's a new "round rect" TFT display - it's 1.69" diagonal and has high-density 220 PPI, 280x240 full-colour pixels with IPS any-angle viewing. We've seen displays of this calibre used in smartwatches and small electronic devices but they've always been MIPI interfaces. Finally, we found one that is SPI and has a friendly display driver, so it works with any and all microcontrollers or microcomputers!

This lovely little display breakout is the best way to add a small, colourful, and very bright display to any project. Since the display uses 4-wire SPI to communicate and has its own pixel-addressable frame buffer, it can be used with every kind of microcontroller. Even a very small one with low memory and few pins available! The 1.69" display has 280x240 16-bit full-colour pixels and is an IPS display, so the colour looks great up to 80 degrees off-axis in any direction. The TFT driver (ST7789) is very similar to the popular ST7735, and our Arduino library supports it well.

Note that the way we get the rounded corners is by deleting pixels. The corner pixels are still addressed in RAM, they just don't appear, so it isn't like you have to do some special radial-pixel mapping. Treat it like a rectangular display.

Our breakout has the TFT display soldered on (it uses a delicate flex-circuit connector) as well as an ultra-low-dropout 3.3V regulator and a 3/5V level shifter so you can use it with 3.3V or 5V power and logic. We also had a little space so we placed a microSD card holder so you can easily load full colour bitmaps from a FAT16/FAT32 formatted microSD card. The MicroSD card is not included, but you can pick one up here.

Of course, we wouldn't just leave you with a datasheet and a "good luck!" - we've written a full open-source graphics library that can draw pixels, lines, rectangles, circles, text, and bitmaps as well as example code and a wiring tutorial. The code is written for Arduino but can be easily ported to your favourite microcontroller!

This display breakout also features an 18-pin "EYE SPI" standard FPC connector with a flip-top connector. You can use an 18-pin 0.5mm pitch FPC cable to connect to all the GPIO pins, for when you want to skip the soldering. 

TECHNICAL DETAILS

Specifications:

  • 1.69" LCD TFT display
  • Built-in microSD slot 
  • 1x11 header for easy breadboarding
  • 4 x 0.1" / 2.5mm mounting holes in corners
  • TFT screen dimensions: 38mm x 30mm / 1.5" x 1.2"
  • Overall dimension: 45.8mm x 36.8mm x 5.4mm / 1.8" x 1.4" x 0.2"
  • Mounting holes: 1.5" x 1.2"

EYE SPI 18-pin FPC Connector:

  1. VIN (3 to 5V DC power)
  2. Backlight (3~5V logic PWM optional input)
  3. Ground
  4. SPI Clock (3~5V logic in)
  5. SPI MOSI (3~5V logic Microcontroller Out, Screen/SD In)
  6. SPI MISO (3~5V logic Microcontroller In, Screen/SD Out)
  7. TFT Data/Command (3~5V logic in)
  8. TFT Reset (optional 3~5V logic in)
  9. TFT SPI Chip Select (3~5V logic in)
  10. SD Card SPI Chip Select (3~5V logic in)
  11. Unused
  12. Unused
  13. Unused
  14. Unused
  15. Unused
  16. Unused
  17. Unused
  18. Unused

Product Dimensions: 45.8mm x 36.8mm x 5.4mm / 1.8" x 1.4" x 0.2"

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