This display comes with an EYESPI connector, which is an 18pin 0.5mm pitch connector that allows you to use a flex cable to connect your display to your microcontroller. For more details, visit the EYESPI page, or see below for basic pin info.

Power Pins

  • V+ / VIN - This is the power pin. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 3V microcontroller like a Feather M4, use 3V, or for a 5V microcontroller like Arduino, use 5V.
  • 3V / 3Vo - This is the output from the onboard 3.3V regulator. If you have a need for a clean 3.3V output, you can use this! It can provide at least 100mA output.
  • G / Gnd - This is common ground for power and logic.

SPI Pins

  • CK / SCK - this is the SPI Clock pin. Use 3-5V logic level.
  • SI / MOSI - this is the Serial Data In / Microcontroller Out Sensor In pin. It is used to send data from the microcontroller to the SD card and/or TFT. Use 3-5V logic level
  • SO / MISO - this is the Serial Data Out / Microcontroller In Sensor Out pin. It is used for the SD card. It isn't used for the TFT display which is write-only. It is 3.3V logic out (but can be read by 5V logic)
  • TC / TFTCS - this is the TFT Chip Select pin. Use 3-5V logic level

Other Pins

  • RT / RST - This is the TFT reset pin. Connect to ground to reset the TFT! It's best to have this pin controlled by the library so the display is reset cleanly, but you can also connect it to the microcontroller Reset pin, which works for most cases. There is an automatic-reset chip connected so it will reset on power-up. Use 3-5V logic level
  • DC - This is the TFT SPI data or command selector pin. Use 3-5V logic level
  • CC / SDCS - This is the SD card chip select pin, used if you want to read from the SD card. Use 3-5V logic level
  • BL / Lite - This is the PWM input for the backlight control. It is by default pulled high (backlight on) you can PWM at any frequency or pull down to turn the backlight off. Use 3-5V logic level

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

This guide was first published on Mar 29, 2022. It was last updated on Jul 17, 2024.

This page (Pinouts) was last updated on Mar 08, 2024.

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