CS102 II: teardown, adding a UART

I finally got two more of those allwinner a10-based sticks, this time called ‘CS102 II’. Time to crack ’em open, and see what’s inside.

First I couldn’t find the UART. It is possible to MUX it to SD slot, but since my plan was to actually load the kernel from SD…
Anyway, just as I was thinking about encapsulating data in I2C transactions and sending them out via HDMI DDC, I noticed a few more test pads, that were VERY small. That saved the day for me:
A bit soldering ninja-skills and superglue and voila:
There’s also a strange interface on the test pads on the other side. Looks like an SPI & ISR for some 2.4Ghz transceiver chip.


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