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The screen is a bit on the crappy side of things. It can be operated independently of the navigation unit in the trunk of the car, but it requires a communication with microcontroller.

The communication protocol is uni-directional (screen is always receiver) and serial. It uses (or is usable with) 5V logic.

Pinout for the connector in back of the car:

  1 - Red channel for RGB
  2 - Green channel for RGB
  3 - unknown, NC
  4 - serial data
  5 - remote control sensor (I believe it's output from IR receiver mounted in screen)
  6 - Blue channel for RGB
  7 - video ground (chassis ground too, I believe)
  8 - Sync channel for RGB
  9 - unknown, NC
  10 - composite video input (75Ohm terminated).

Overview of the protocol:

Implementation for AVR:

For more information on protocol, see:

rti.txt · Last modified: 2018/03/17 16:03 (external edit)