Datasheet

OK so, exciting right? But, what's the catch? The catch is this add on board uses nearly every pin available on the
Raspberry Pi and those pins are hardcoded, they cannot be moved or rearranged. The pins used are GPIO 2 through
21 inclusive. That means you don't get the UART RX/TX pins (no console cable) and you don't get the standard user
I2C pins, the EEPROM I2C pins, or hardware SPI pins. You do get to use pins #22, #23, #24, #25, #26 and #27, and
the USB ports are fine to use too.
The other catch is that this display replaces the HDMI/NTSC output, so you can't have the DPI HAT and HDMI
working at once, nor can you 'flip' between the two.
Also, there's no PWM's available so you can't have precision backlight control unless you somehow rig up an external
PWM generator with a 555 or something.
Finally, we did test this setup with a straight-up Raspbian and after the software installs, it works great. However, we
don't guarantee it will work with any other Raspberry Pi operating system or setup.
© Adafruit Industries https://learn.adafruit.com/adafruit-dpi-display-kippah-ttl-tft Page 4 of 20