Sinlinx SinA31s

The SinA31s is an A31s core/daughter board combo from Sinlinx. The core board can be purchased separately and integrated into other projects.

= Identification = The PCB has the following silkscreened on it: SINA31S 芯灵思 | SINLINX

In android, under Settings->About Tablet, you will find:
 * Model Number: Allwinner-Tablet
 * Build Number: fiber_a31st-eng 4.2.2 JDQ39 20140725 test-keys

= Sunxi support =

Current status
This board is supported on mainline U-Boot and Linux kernel. See sections below.

Manual build

 * Follow SDK build howto to build u-boot and the kernel from the SDK.
 * The .fex file can be found in sunxi-boards as sinlinx_a31s.fex

Mainline U-Boot
For building mainline u-boot, use the SinA31s target.

Mainline kernel
Use the sun6i-a31s-sina31s.dtb device-tree file for the mainline kernel.

= Tips, Tricks, Caveats =

FEL mode
The U-Boot button triggers booting from mmc0 directly, and falls back to FEL mode if that fails.

Optional LCD / VGA converter
Sinlinx also provides a 7" LCD with capacitive touchscreen, or an LCD to VGA converter board, for video display.

= Serial console port = The board uses a converter chip to convert the UART signal level to RS232 levels. On the upper side of the board is a 9-pin RS232 connector.

= Pictures =

Manufacturer images
Sinlinx provides Android and Linux images to buyers, hosted on BaiduPan (Baidu's cloud storage).