Semitime g2

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Semitime g2
Semitime g2 front.jpg
Manufacturer Semitime
Dimensions 88.5mm x 35mm x 13.4mm
Release Date December 2012
Website Reseller Product Page
Specifications
SoC A10s @ 1Ghz
DRAM 1GiB DDR3 @ 432MHz
NAND 4GB
Power DC 5V @ 2A
Features
Video HDMI (Type C - mini)
Audio HDMI, internal microphone
Network WiFi 802.11 b/g/n (Realtek RTL8189ES)
Storage µSD
USB 1 USB2.0 Host, 1 USB2.0 OTG

This is an obvious Rikomagic MK802+ clone, but it contains an A10s SoC instead. It is not clear whether it was ever sold by Rikomagic itself, or whether it was only marketed by third parties.

Contents

Identification

This device is clearly marked as an MK802+ on the case, and is often sold as such. It however has 1GB of RAM and an A10s chip inside. The paper manual mentions "AK-212MinPC". The board is marked as "ST-G2", together with the kernel version strings, this led us to the manufacturer.

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

  • Model Number: SoftwinnerEvb
  • Kernel-Version: 3.0.8 qliu00@semitime #6 Mon Dec 10:44:01 CST 2012
  • Build Number: elite_nm307_v11-eng 4.0.4 IMMQ76D 20121210 test-keys

Incidentally, that's the same android image that is running on the Megafeis A08.

Sunxi support

Current status

Supported.

Images

HW-Pack

BSP

Manual build

  • For building u-boot, use the "Semitime_G2" target.
  • The .fex file can be found in sunxi-boards as semitime_g2.fex

Everything else is the same as the manual build howto.

Mainline kernel

Use the sun5i-a10s-mk802.dts device-tree file for the mainline kernel.

Tips, Tricks, Caveats

FEL mode

There is a special button to trigger FEL mode. You can reach it through the bottom-left hole of the top cover of the device.

Adding a serial port (voids warranty)

Bad routing: Not a UART!

Device disassembly

The three piece case is clicked together. Do not try to get the semi-transparent bit around the USB Host connector off, as it is clipped into the top and you could damage the clip. Just gently push your plastic tool between the bottom and the top, and push the top part of the shell outwards. You will soon hear the clips release.

Locating the UART

On the board labelled VER:1.0, due to bad routing, the two pads which were meant to be the UART instead turned out to be PB11 and PB14, rendering them useless. You will have to resort to a MicroSD breakout board to get serial on this device.

Pictures

Also known as

  • It is often branded as an A10s based MK802+, but it just shares the external packaging and has MK802+ written on the top cover.

See also

  • Rikomagic MK802: The 512MiB A10 based original, which has the same case.
  • Rikomagic MK802+: The 1GiB A10 based device, which also has the same case.
  • Megafeis A08: Different board, different exterior, but it has the same android identification strings.
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