{{indexmenu_n>40}} ====== VIM1S Boot into Upgrade Mode ====== In order to flash the OS into eMMC with USB Upgrade Tool, you need to put the board enter Upgrade Mode.\\ There are 4 ways to boot into upgrade mode: * TST Mode (Recommended) * Key Mode * Serial Mode * Bootable TF Card - Connect VIM1S to PC with a USB-C cable. - Quickly press the ''Function'' key **3 times in 2 seconds**, then release the key. You will see the Power LED (Red) blink for about 3 seconds. - After the Power LED (Red) turns OFF, this indicates that the board is in Upgrade Mode (Maskrom Mode). - Connect VIM1S to PC with a USB-C cable. - Long press the ''POWER'' key without releasing it. - Short press the ''RESET'' key and release it. - Count for 2 to 3 seconds, then release the ''POWER'' key to enter into Upgrade Mode. The Sys LED (White) will turn on when you’ve entered Upgrade Mode. - Connect VIM1S to PC with a USB-C cable. - Refer to [[products:sbc:vim1s:development:setup-serial-tool|Setup Serial Too]] to setup your Serial Tool for VIM1S. - Once again, make sure you’ve done the correct connections and setup. - Hit ''SPACE'' on your keyboard at the moment of bootup to stop autoboot. This step will let VIM1S boot into U-Boot command line. - Type ''run update'' in the terminal of U-Boot. The Sys LED (White) will turn ON when you’ve entered Upgrade Mode. - [[products:sbc:vim1s:development:create-bootable-tf-card|Create a Bootable TF Card]]. - Insert a Bootable TF card into the slot. - Refer to this guide to setup your serial tool for VIM1S. - Connect VIM1S to PC with a USB-C cable. - Hit ''SPACE'' key at the moment of bootup to stop autoboot. This step will let VIM1S boot into U-Boot. - Type ''run update'' in the U-Boot terminal.