ET-Q8 A33

This is low cost Allwinner A33 based tablet by softwinner. = Identification =

On the back of the device, the following is printed: The PCB has the following written on it: ET_Q8_A23_A33_v1.6 140903

In android, under Settings->About Tablet, you will find:
 * Model Number: MID-756
 * Build Number: astar_rda-eng 4.4.2 KVT 49L 20141110 test-keys

= Sunxi support =

Current status
This tablet comes with the Android 4.4.2 as Stock OS.

Manual build

 * For building u-boot, use the  target.
 * The .fex file can be found in sunxi-boards as

Everything else is the same as the manual build howto.

Mainline U-Boot
Not yet available. hopefully coming soon...

Mainline kernel
Not yet available.

= Tips, Tricks, Caveats = Unlike, other allwinner devices,Script.bin is not present in the vfat partition(nanda) as file.

Instead, It is located 0x43000000, it's size is	0x00020000. script.bin can be extracted from /dev/mem using mmap.

FEL mode
Swith off the tablet, now press and hold volume Up button, Press and hold Power Button for a second, then quickly release and press power button 7-8 times, it'll trigger FEL mode.

= Adding a serial port (voids warranty) =



UART0 RX/TX is multiplexed with MMC.

Device disassembly
It is absolutely trivial to open this device.

The edge of the back cover needs to be pushed to the outside to release the clips. So put the device on its back and insert your plastic tool in the outer edge. Push the outer casing away from the display, and you should soon hear the clips release.

Locating the UART
MicroSD pins CLK(pin 5) and CD(pin 2) are multiplexed with UART 0 RX and TX respectively.

debug messages from Stock bootloader and Kernel appeared on this UART.

For more information have look at MicroSD_Breakout

= Pictures =

Here are some pictures(sorry for bad quality).

= See also =
 * A-Star_KV49L