Inet D70 A23

= Identification = Case: Fondi

PCB: INET-D70-REV03 Zeng-gc 2014-07-01

Android -> Settings -> About Tablet: Model Number: T725B Build Number: A23_D70_D708C_1410038.20141021

= Sunxi support =

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
For building mainline U-Boot, use the  target.

Mainline kernel
Use the  device-tree file for the mainline kernel.

= Tips, Tricks, Caveats =

FEL mode
To enter FEL mode:


 * 1) Switch off the device.
 * 2) Hold down the Vol- and Power buttons.
 * 3) Release the Power button once u-boot reports: key pressed value=0xb.
 * 4) Press the Power three times, u-boot should report: you can unclench the key to update now.
 * 5) Release the Vol- button.

It is possible to query the device version at this stage, but reading results in failure.

Obtaining script.bin

 * 1) Cross-compile, and statically link, the script_extractor utility from sunxi-tools.
 * 2) Transfer the script_extractor binary to the device.
 * 3) Execute script_extractor, redirecting its output to a file named script.bin.
 * 4) Transfer script.bin to the host.

= Adding a serial port (voids warranty) =



Device disassembly

 * 1) Remove the two screws surrounding the button panel interface.
 * 2) Insert a suitable plastic tool into the seam of the casing next to one of the screw holes.
 * 3) Gently slide the tool towards and around the nearest corner.
 * 4) If the first clip has not been released at this point, twist the tool slowly to pry the casing halves apart.
 * 5) Place the tool on the opposite end of the released clip and proceed by sliding the tool towards the next clip.
 * 6) Continue carefully around the perimeter of the casing until all clips have been released.

Locating the UART
The TX and RX pads are located next to the Touchscreen ZIF connector, and the negative battery terminal provides the GND reference. Please review the UART howto for further information.

UART Cable Routing
As an alternative to carefully boring a hole in the rear casing, the Rear Camera may be removed for convenient cable access

= Pictures =

= Also known as =

Fondi T725B

= See also =