So I’m working on making a replacement PCB for the Micro Arcade that you can reuse the case, color screen, battery and speaker.
So far I’ve probed the pinout to be:
*GND low side switch, signal is open when system is off, tied to ground when powered on.
**CS signal is low when writing data
***D/C signal is low when writing commands, high when writing data
UPDATE: Figured it out!
The next step will be to use the signal analyser to capture the init sequence and compare it to some graphics drivers values, hopefully it will match. Then I just gotta figure out what to do with pin 7 and 10 as it isn’t totally obvious how they function. Under the oscilloscope it appears that they are tri state and ringing off the clock signal.
Does anyone have any ideas or interest in the project? If you’d like to help reverse engineer one of these and have the tools/knowledge to do so but lack the Micro Arcade to work on let me know! If you have one but don’t want to risk damaging it but can help out, let me know!