ICOU Fatty I

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ICOU Fatty I
ICOU Fatty I Front.png
Manufacturer ICOO
Dimensions 135mm x 200mm x 7mm
Release Date July 2013
Website Device Product Page
Specifications
SoC A20 @ 1Ghz
DRAM 1GiB DDR3 @ 384MHz
NAND 8GiB
Power DC 5V @ 2A, 3500mAh 3.7V Li-Ion battery
Features
LCD 768x1024 (7.85" 3:4)
Touchscreen 5-Finger Capacitive (Ilitek aimvF)
Video HDMI (Type C - mini)
Audio 3.5mm headphone plug, HDMI, internal stereo speakers, internal microphone
Network WiFi 802.11 b/g/n (Realtek RTL8188ETV)
Storage µSD
USB 1 USB2.0 OTG
Camera 0.3MP (640x480) front, 2.0MP (1600x1200) rear

Contents

Identification

The PCB has the following silkscreened on it:

2013-04-10
TOPWISE-013
S785F-MAINBOARD-V2.0.0

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

  • Model Number: Fatty1
  • Build Number: 20130601-S785

Sunxi support

Current status

There is neither mainline U-Boot nor mainstream kernel support at this point.

The legacy U-Boot properly supports the device.

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
  • LCD does not work (it uses MIPI), but backlight works
  • Wi-Fi doesn't work (interface is never ready)
  • HDMI doesn't work (segfault)

Manual build

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

Everything else is the same as the manual build howto.

Tips, Tricks, Caveats

FEL mode

The VOL- button triggers FEL mode. This is the third button from the top on the right edge of the device.

Adding a serial port (voids warranty)

ICOU Fatty I UART pads

Device disassembly

Opening the device is really straightforward. There are two Phillips screws to remove on top of the device and once these are out, the back aluminium case can easily be removed using a plastic tool to pop a few pins.

Locating the UART

The UART pads are clearly labeled on the PCB: GND, Rx, Tx. These pads are located on the edge of the board, left and below the RAM chips. All you have to do is solder on some wires according to our UART howto.

Pictures

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Manufacturer images

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