Z28 Pro

• UART is possible to solder to this TV box and is accessible with unusual speed: 1500000
• Video and 3D acceleration addon
• Images are optimized and tested on 2GB / 16GB eMMC / 1000TX LAN version
• Clocking to maximum safe CPU speed (1.51Ghz) is possible this way:

  sed -i "s/MAX_SPEED=.*/MAX_SPEED=1510000/" /etc/default/cpufrequtils 
  service cpufrequtils restart

  Make sure to install large heatsink!

Preparation:

1. Download and unpack flasher for Linux
2. Download and unpack the desired armbian image
3. Unpack and copy armbian .img file into z28_linux_flasher/image/armbian.img

Flashing:

1. Short a resistor with tweezers as shown in the picture and attach USB A-A cable to the edge USB2.0 port at the same time
2. Your device should be switched to maskrom mode and become ready for flashing. This is indicated as new USB device: Bus 003 Device 007: ID 2207:320c
3. Go to z28_linux_flasher and execute: sudo ./flash_tool.sh -c rk3328 -p system -i image/armbian.img
4. You should see running % from 0 to 100% and the process should be done in a few minutes:
   PARTITIONS OFFSET: 0 sectors.
   Downloading bootloader succeeded.
   Write LBA from file (100%)
   Reset Device OK.
5. Unplug cables and power the board.