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→How to burn Android image to SPIFlash+NVMe SSD
<li><p>Then download the image of Android11</p>
<ol style="list-style-type: lower-alpha;">
<li><p>After opening the download link of the Android image, you can > see the following two types of Android images. Please select > the image in the '''<span class="mark">SPIFlash-NVME SSD boot image</span>''' > folder to download</p>
<div class="figure">
</div></li>
<li><p>After entering the '''<span class="mark">SPIFlash-NVME SSD boot image</span>''' > folder, you can see the following two images. The difference > between them is:</p>
<ol style="list-style-type: none;">
<li><p>a) The image without lcd is specially used for HDMI display and > supports 4K display. If you don’t use the LCD screen, > please download the image without lcd</p></li><li><p>b) If you want to use an LCD screen, please choose the image > with lcd</p>
<p>[[File:cm4-img143.png]]</p></li></ol>
</li></ol>
<li><p>Then start burning the Android image to SPIFlash+NVMe SSD</p>
<ol style="list-style-type: lower-alpha;">
<li><p>First, connect the development board to the Windows computer > through a USB2.0 male-to-male data cable. The location of the > USB2.0 programming port on the development board is as shown > in the figure below.</p>
<p>[[File:cm4-img38.png]]</p></li>
<li><p>Make sure that the development board is not inserted into the TF > card and not connected to the power supply</p></li><li><p>Then press and hold the MaskROM button on the development board. > The location of the MaskROM button on the development board is > as shown in the figure below:</p>
<p>[[File:cm4-img39.png]]</p></li>
<li><p>Then connect the development board to the power supply of the > Type-C interface, power it on, and then release the MaskROM > button</p>
<p>[[File:cm4-img40.png]]</p></li>
<li><p>If the previous steps are successful, the development board will > enter the '''MASKROM''' mode at this time, and the interface of > the burning tool will prompt "'''Found a MASKROM devic'''e "</p>
<p>[[File:cm4-img41.png]]</p></li>
<li><p>Then click the "'''Upgrade Firmware'''" column of the burning > tool</p>
<p>[[File:cm4-img130.png]]</p></li>
<li><p>Then click the "'''Firmware'''" button to select the Android > image that needs to be burned</p>
<p>[[File:cm4-img131.png]]</p></li>
<li><p>Finally, click the "'''Upgrade'''" button to start burning. The > burning process is shown in the figure below. You can see that > the firmware will be burned into SPIFlash first, and then > burned into PCIE. The Android system will start automatically > after burning.</p>
<p>[[File:cm4-img144.png]]</p></li></ol>
</li></ol>
