Sunchip SDK-758

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Sunchip SDK-758
SDK-758 front.jpg
Manufacturer Sunchip
Dimensions 101.6mm x 101.6mm x 23.6mm
Release Date April 2014
Website Device Product Page
SoC A20 @ 1Ghz
DRAM 512MiB DDR3 @ 384MHz
Power DC 5.6V @ 2A
Video HDMI, Composite Video through 3.5mm jack
Audio 3.5mm combined Composite AV plug, HDMI
Network WiFi 802.11 b/g/n (Realtek RTL8188ETV), 10/100Mbps Ethernet (ICplus IP101GA)
Storage µSD
USB 1 USB2.0 Host, 1 USB2.0 OTG
Other IRDA
Headers UART

This page needs to be properly filled according to the New Device Howto and the New Device Page guide.


The case of this device has a very distinct and clean look. Other than that it reads the following printed information on the bottom:

[Android Logo]
INPUT : 5V = 2A
[FCC] [CE] [Do not dispose]

On the bottom of the PCB it says: SDK-758-V1.0 2013-12-03

In android, under Settings->About Tablet, you will find:

  • Model Number: CX_718
  • Build Number: sugar_ref001-eng 4.2.2 JDQ39 20140507 test-keys

Sunxi support

Current status

Kernel and u-boot are currently WIP.




Manual build

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

Everything else is the same as the manual build howto.

Mainline U-Boot

Mainline kernel

Tips, Tricks, Caveats

AV plug

The 3.5mm RCA AV jack has the following pinout:

Tip:    Composite
Ring 1: Audio Left
Ring 2: Audio Right
Base:   Ground

FEL mode

The "UBOOT" button triggers FEL mode. It is located between UART and the microSD slot. FEL mode is currently not too useful due to the lack of a standard OTG port, but perhaps a special USB Type-A (male-male) cable could work.

Adding a serial port (voids warranty)

UART pads

Device disassembly

The top lid (shiny part) is held only by plastic notches. Insert your Plastic tool between top and bottom case vertically, and carefully work your way round.

Locating the UART

RX, TX and GND are clearly marked on the board right next to the microSD slot. Just solder on some wires according to our UART howto, or you can solder in some 2.54mm pitch connectors like in the picture.


Also known as

See also