How To Boot Into Upgrade Mode

There are 3 different ways to boot into Upgrade Mode:

  • Keys Mode (Side-Buttons)
  • Serial Mode
  • MRegister Mode

Usually, the first two methods will meet the needs of most users. However, in some cases such as burning an incorrect u-boot, or if your device is unable to boot at all, you can attempt to rectify the issue with the MRegister mode.

Keys Mode (U-Boot is Running)

  1. Power on VIM1.
  2. Long press the Power key without releasing it.
  3. Short press the ‘Reset’ key and release it.
  4. Count to 10 seconds and release the ‘Power’ key to enter into upgrade mode

Serial Mode (For Developers)

  1. Refer to this guide to setup your serial tool for VIM1.
  2. Once again, ensure that you’ve done the right connections and setup.
  3. Hit any keys at the moment of bootup to stop autoboot. This step will let VIM1 boot into u-boot mode.
  4. Type run update on the terminal of u-boot as below:
kvim# run update

MRegister Mode (Maskrom Mode)

  1. Power on VIM1.
  2. Use a tweezer to short-circuit the two pads of the M register, and without releasing it…
  3. Short press the Reset key and release it to boot into upgrade mode

Image of MRegister_ShortCircuit
Tip: The M register is located on the backside of your VIM1