More details may soon be found on Sinlinx website, and if you can read and write Chinese, you may ask question on their forums.Chipset maker Allwinner recently announced that it will be entering the 64-bit market but it hasn’t lost its focus on highly affordable white-box tablets where the company's strength lies. The new board is available on Taobao for 349.00 CNY (~$54). This is all for the older board, so modifications would be needed for the new features of SIN-A33 Plus board. SIN-A33 board also have its own page on linux-sunxi community, and while there isn’t any support for Allwinner A33 on the legacy kernel (3.4), there’s some support in mainline U-boot and Linux with sun8i-a33-sina33.dtb device tree binary. The company provided me a link to the SDK (password: xfux) with Android 4.4 and Linux 3.4 + Qt 4.8.7, as well as documentation (mostly in Chinese). There’s actually very little information about SIN-A33 Plus, but there are more details about its smaller predecessor that lacks VGA, Ethernet and wireless connectivity, and a few other features.

Dimensions – Mainboard: 145 x 108 mm CPU module: 63 x 48 mm.

Power Supply – 5V via power barrel 2-pin battery header AXP233 PMIC on CPU module.

Misc- Power, reset, volume and home buttons.

Debugging – 3-pin UART header for serial console.

Other Expansion Headers – User I/O, Camera.

USB – 3x USB 2.0 host ports, 1x micro USB OTG port.

Connectivity – 10/100M Ethernet, WiFi and Bluetooth.

Audio – 3.5mm audio jacks for microphone and headphone, speaker header.

Video Output – LCD connector, MIPI DSI header, and VGA port.

SoC – Allwinner A33 quad core Cortex-A7 1.3 GHz with Mali-400MP2 GPU.

But this morning, I’ve come across Sinlinx company on linux-sunxi mailing list, and one of their latest development board – Sinlinx SIN-A33 Plus – is based on their older Allwinner A33 and features LCD, VGA & camera interfaces, I/Os headers, Ethernet and WiFi/Bt connectivity, and various other ports. Allwinner A33 has never been a popular processor for development boards and single board computers, despite its $5 price tag for a quad core processor (in 2014), as without HDMI support, it’s been mostly used in low cost Android tablets.

Qt 7 tablet allwinner a33