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Erase eMMC or SPI Flash

Enter to Maskrom Mode​

  1. Install the CM3 core board onto the CM3 IO Board
  2. Remove MicroSD Card
  3. Press and hold the SPI Disable button
  4. Connect the USB-A to Micro USB cable by plugging the Micro USB end into the Radxa CM3 IO OTG port (Micro USB port), and then plug the other USB-A end into your computer
  5. Plug in the power cable to power on the board. If the power LED is steadily illuminated, that indicates the board has successfully entered Maskrom mode
tip

To erase eMMC, press and hold SPI Disable button; to erase SPI Flash, press and hold eMMC Disable button.

cm3 core buttoncm3 io with cm3

Erase eMMC​

  1. Generate zero.img

    dd if=/dev/zero of=./zero.img bs=1M count=64

  2. Make sure the host recognises Maskrom

    sudo rkdeveloptool ld
    DevNo=1	Vid=0x2207,Pid=0x350a,LocationID=109	Maskrom

  3. Flash Loader

sudo rkdeveloptool db
  1. Erase eMMC
sudo rkdeveloptool wl 0 zero.img
  1. Reboot
sudo rkdeveloptool rd

Erase SPI Flash​

  1. Generate zero.img

    dd if=/dev/zero of=./zero.img bs=1M count=64

  2. Make sure the host recognises Maskrom

    sudo rkdeveloptool ld
    DevNo=1	Vid=0x2207,Pid=0x350a,LocationID=109	Maskrom

  3. Flash Loader

sudo rkdeveloptool db  rk3588_spl_loader_v1.15.113.bin
  1. Erase SPI Flash
sudo rkdeveloptool ef
  1. Reboot
sudo rkdeveloptool rd