serial (RS232) port on MK802IIIS

[w4sepp]

Does any one know if and how to access the internal debug UART on the MK802IIIS ? Please post a picture

Thank you


.... seems there is not such a good knowledge about the hardware here

still hoping to get the information. THANK YOU

[w4sepp]

I just found the information for the 802

https://www.miniand.com/forums/forums/development/topics/internal-uart-port-of-mk802

I hope the MK802IIIS also has a access to the serial interface.

[w4sepp]

Found some hints for the RS232

Oval Elephant UG802 with RK3066 CPU





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The color coding for the pins is as follows:
Green = Ground
Blue = Serial TxD
Red = Serial RxD
White = No signal
Yellow = 3.3V
Magenta = 2.5V
The serial connection is the expected 3.3V at 115,200bps. A log from the boot process is available here. Regrettably, I didn't take the time to see if the bootloader had an interactive mode. I'll make a dump of the bootloader and examine it, see if there is anything interesting or useful there.


I'm guessing the unpopulated TO92 package is intended to be an IR receiver, but that's only a guess.


The use of the other pins is less clear, I'm guessing that by either pulling some set high or low, the device can be placed in a factory flash/recovery mode, however more time with the CPU datasheet and experimentation required to figure this out.

Got it from

http://eirev.blogspot.com.es/2012/09/oval-elephant-ug802-with-rk3066-cpu.html