Yones Toptech BD1078
|Yones Toptech BD1078|
|Dimensions||263mm x 165mm x 12mm|
|Release Date||April 2014|
|SoC||A20 @ 1Ghz|
|DRAM||1GiB DDR3 @ 408MHz|
|Power||DC 5V @ 2A, 6000mAh 3.7V Li-Ion battery|
|LCD||1024x600 (10.1" 16:9)|
|Touchscreen||5-finger capacitive (Silead GSL1680)|
|Video||HDMI (Type C - mini)|
|Audio||3.5mm headphone plug, HDMI, internal stereo speakers, internal microphone|
|Network||WiFi 802.11 b/g/n (Realtek RTL8723AS)|
|USB||1 USB2.0 Host, 1 USB2.0 OTG|
|Camera||0.3MP (640x480) front, 2.0MP (1600x1200) rear|
The PCB has the following silkscreened on it:
In Android, under Settings->About Tablet, you will find:
- Model Number: AX105
- Build Number: wing_bd1078-eng 4.2.2 JDQ39 20140307 test-keys
Some features are missing on Linux (sunxi-3.4 branch):
- USB OTG doesn't work on the external connector (common to all sun7i devices) and it doesn't seem to work in either host or device mode
- Wi-Fi and Bluetooth are untested
For building mainline U-Boot, use the Yones_Toptech_BD1078 target.
- For building u-boot, use the Yones_Toptech_BD1078 target.
- The .fex file can be found in sunxi-boards as yones_toptech_bd1078.fex
Everything else is the same as the manual build howto.
Tips, Tricks, Caveats
Any button (VOL-, VOL+, BACK) triggers FEL mode from boot1.
Sending '2' over UART at boot triggers FEL mode from boot1.
USB storage mode
Sending '1' over UART at boot triggers an USB storage mode that exposes the nanda partition as well as the Android external storage.
The reset button (on the side of the device) reboots the device.
Internal µSD card
The device has an internal µSD card port that shows as mmcblk1. This port doesn't have boot priority over NAND.
Adding a serial port (voids warranty)
In order to open the device, there are two Phillips screws to remove from the side with the connectors. The pins from the white part are easy to pop but it is advised to use a a plastic tool, starting from the side with the connectors. The front panel is very fragile and pressuring the screen to pop open the pins can easily end up in breaking the touch screen panel.
Locating the UART
The UART pads are located on the back of the PCB. There is a plastic film that protects the back of the board from shorting with the back of the LCD panel. The pads are clearly labeled on the PCB: GND, Rx, Tx. It is advised to put the plastic film back after soldering connectors according to the UART howto.
Also known as